Articles

STUDI AKUMULASI PIGMEN β-CRYPTOXANTHIN UNTUK MEMBENTUK WARNA JINGGA BUAH JERUK DI DAERAH TROPIKA Sumiasih, Inanpi Hidayati; Arzam, Taruna Shafa; Poerwanto, Roedhy; Efendi, Darda; Agusta, Andria; Yuliani, Sri
Jurnal Hortikultura Indonesia Vol. 9 No. 2 (2018): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (934.285 KB) | DOI: 10.29244/jhi.9.2.73-83

Abstract

ABSTRACTDegreening is a transformation process on peel which enables it to change color from green to orange on citrus fruits. The orange color of the peel comes from the mixture of carotenoid pigments, such as ?-cryptoxanthin and ?-citraurin. The pigments contributed in the formation of ?-citraurin are ?-cryptoxanthin and zeaxanthin. The objectives of this study were (1) to obtain proper degreening temperature in the orange color formation of several citrus varieties, and (2) to identify and determine pigments of ?-cryptoxanthin pigment and total chlorophyll content in citrus peel after degreening. This study was conducted at PKHT IPB and LIPI Cibinong from July 2013 to December 2013, and from February 2016 to May 2017. About 100 ppm of ethylene gas was injected into a citrus-containing box using 5 ml syringe, then the box was placed in cool storage at 15 0C, 20 0C and room temperature, for 72 hours. The results showed that the best colors of Keprok Selayar and Keprok Tejakula were obtained by the degreening at 15 0C, in Siam Kintamani it was obtained by degreening at 20 0C. Degreening significantly reduced the total chlorophyll content, and increased ?-cryptoxanthin content. The content of ?-cryptoxanthin after degreening was 3 folds higher on highland Citrus reticulata than lowland citrus.Keywords: citrus color index, chlorophill, degreening, ethylene, tropical citrusABSTRAKDegreening adalah proses perombakan warna hijau pada kulit jeruk diikuti dengan proses pembentukan warna jingga. Warna jingga adalah campuran antara ?-cryptoxanthin dengan ?-citraurin. Pigmen yang berkontribusi dalam pembentukan ?-citraurin adalah ?-cryptoxanthin dan zeaxanthin. Tujuan penelitian ini ialah (1) Mendapatkan suhu degreening yang tepat dalam pembentukan warna jingga pada beberapa varietas jeruk, (2) Identifikasi dan penentuan kadar pigmen ?-cryptoxanthin dan kandungan total klorofil pada kulit jeruk setelah degreening. Penelitian ini dilakukan di PKHT IPB dan LIPI Cibinong pada bulan Juli 2013 sampai Desember 2013, dan bulan Februari 2016 sampai Mei 2017. Degreening dilakukan dengan menginjeksikan gas etilen konsentrasi 100 ppm ke dalam wadah tertutup yang berisi jeruk menggunakan syringe 5 ml, kemudian disimpan pada suhu 15 0C, 20 0C dan suhu ruang, selama 72 jam. Hasil penelitian menunjukkan bahwa warna terbaik jeruk Keprok Selayar dan Tejakula diperoleh dengan degreening pada suhu 15 0C, Siam Kintamani diperoleh dengan degreening pada suhu 20 0C. Degreening dapat menurunkan kandungan total klorofil secara tajam, dan terbukti meningkatkan kandungan pigmen ?-cryptoxanthin. Kandungan pigmen ?-cryptoxanthin setelah degreening 3 kali lebih tinggi pada jeruk keprok dataran tinggi dibandingkan dengan dataran rendah.Kata kunci: citrus color index, degreening, etilen, jeruk tropika, klorofil
APLIKASI KALSIUM DAN NAA UNTUK MENGENDALIKAN GETAH KUNING BUAH MANGGIS (GARCINIA MANGOSTANA L.) Tanari, Yulinda; Efendi, Darda; Poerwanto, Roedhy; Sopandie, Didy; Suketi, Ketty
Jurnal Hortikultura Indonesia Vol. 9 No. 1 (2018): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.793 KB) | DOI: 10.29244/jhi.9.1.10-18

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ABSTRACTThe yellow sap is produced naturally in mangosteen organ except in the root. The yellow sap contaminated the aryl and rind if the epithelial cell walls rupture due to deficiency of calcium (Ca). Calcium is one of structural component of cell walls, whereas naphthaleneacetic acid (NAA) has its role in improving cell division and cell elongation. Interaction of Ca and NAA can improve sink strength and capacity because the newly formed cells need Ca to construct wall structure. This experiment aimed at finding out the effect of Ca and NAA applications in reducing the contamination of yellow sap in mangosteen. The experiment was conducted by using factorial random block design consisting of 2 factors and 3 replications. The first factor was Ca dosage (0 and 4.8 kg/tree), and the second factor was NAA concentration (0, 200, 400 and 600 ppm). The results showed that application of 4.8 Ca/tree and 200 ppm NAA as much as 5 ml / fruit effectively improve the content of Ca pectate in pericarp, reduced the percentage of yellow sap contamination on the fruit segment, aryl and rind to 0% and 12.3% respectively compared to control (17.8% on fruit segment, 36.8% on aryl and 56.1% on rind).Key words: aryl, Ca pectate, cell wall, middle lamela.ABSTRAKGetah kuning adalah getah yang dihasilkan secara alami pada setiap organ manggis, kecuali pada akar. Getah kuning akan keluar dan mencemari aril serta kulit jika dinding sel epitel pecah karena kekurangan kalsium (Ca). Kalsium adalah komponen dinding sel, berperan dalam struktur dan permeabilitas membran sedangkan asam naftalenasetat (NAA) berperan penting dalam meningkatkan pembelahan dan pembesaran sel. Interaksi keduanya dapat meningkatkan kapasitas sink buah karena sel yang baru terbentuk membutuhkan Ca dalam menyusun struktur dinding sel. Percobaan bertujuan untuk mengetahui pengaruh aplikasi Ca dan NAA dalam menurunkan cemaran getah kuning manggis. Percobaan menggunakan rancangan acak kelompok faktorial 2 faktor dengan 3 ulangan. Faktor ke-1 yaitu dosis Ca (0 dan 4.8 kg Ca/pohon) dan faktor ke-2 yaitu konsentrasi NAA (0, 200, 400 dan 600 ppm) dengan volume semprot 5 ml perbuah. Hasil percobaan menunjukkan bahwa aplikasi 4.8 kg Ca/pohon dengan NAA 200 ppm sebanyak 5 ml/buah efektif meningkatkan kandungan Ca pektat perikarp dan menurunkan persentase buah tercemar getah kuning menjadi 0% pada juring dan aril serta 12.3% pada kulit dibandingkan dengan perlakuan kontrol (17.8% pada juring, 36.8% pada aril dan 56.1% pada kulit buah).Kata kunci: aril, Ca pektat, dinding sel, lamela tengah
DEGREENING BUAH JERUK SIAM (CITRUS NOBILIS) PADA BEBERAPA KONSENTRASI DAN DURASI PEMAPARAN ETILEN H., Nian Rimayanti; Poerwanto, Roedhy; Suketi, Ketty
Jurnal Hortikultura Indonesia Vol. 7 No. 2 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.836 KB) | DOI: 10.29244/jhi.7.2.111-120

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ABSTRACTSiam tangerine peel is green when harvested. Degreening technology by ethylene can improve the citrus peel color becomes uniformly orange. Degreening is a process to break down green pigment (chlorophyll) on citrus peel chemically and form the orange color (carotene) without affecting internal quality of fruit. The purpose of this research was to determine the effect of ethylene concentration and ethylene exposure duration to bring out the color on Siam tangerine from Banyuwangi. Ethylene 0, 100, 200 ppm was injected into the box containing 2.8 kg citrus and was exposed to the cooling chamber with a temperature 18 0C for 24 hours ethylene + 48 hours without ethylene, 48 hours ethylene + 24 hour without ethylene and 72 hours ethylene. Ethylene exposure was conducted using multiple shots method. After exposure, tangerines were put at room temperature condition. Observations were conducted every two days: (a) non-destructive observation conducted using color reader to determine the color changes; (b) destructive observations for measuring chlorophyll and carotenoids content and physico-chemical changes i.e. the hardness, soluble solid content, titratable acidity and vitamin C. The results showed that the best combination was 200 ppm ethylene concentration for 48 hours ethylene exposure. This degreening technique altered the Citrus Colour Index (CCI) value from -1.60 to be 6.50, changed the tangerines into a bright orange. Degreening did not give negative impact on internal quality.Key words: carotenoid, chlorophyll, citrus color index, cooling chamber, tropical citrus         ABSTRAKWarna kulit buah jeruk siam saat dipanen umumnya hijau. Teknologi degreening menggunakan gas etilen dapat memperbaiki warna kulit jeruk tropika menjadi jingga. Degreening merupakan proses perombakan pigmen hijau (klorofil) pada kulit jeruk secara kimiawi dan membentuk warna jingga (karotenoid) tanpa mempengaruhi kualitas internal buah. Penelitian bertujuan mengkaji pengaruh konsentrasi dan durasi pemaparan etilen untuk menstimulasi pigmen jingga dan pengaruhnya terhadap sifat fisikokimia jeruk siam Banyuwangi. Degreening jeruk menggunakan etilen 0, 100, dan 200 ppm diinjeksikan ke dalam box degreening yang berisi jeruk 2.8 kg dan dipaparkan pada cooling chamber dengan suhu 18 0C selama 24, 48, dan 72 jam. Pengamatan dilakukan setiap dua hari: (a) pengamatan non-destruktif dengan menggunakan color reader untuk mengetahui perubahan warna; (b) pengamatan destruktif dengan mengukur kekerasan, kandungan klorofil dan karotenoid, Padatan Terlarut Total (PTT), Asam Tertitrasi Total (ATT) dan vitamin C untuk mengetahui perubahan fisikokimia jeruk. Hasil penelitian menunjukkan perubahan warna kulit buah mulai terjadi pada hari ke 4 setelah perlakuan degreening. Konsentrasi etilen terbaik adalah 200 ppm dengan durasi pemaparan 48 jam yaitu dapat meningkatkan kualitas warna buah jeruk siam dari hijau menjadi jingga kekuningan dan mampu mengubah nilai Citrus Colour Index (CCI) dari -1.60 (hijau) menjadi 6.50 (jingga kekuningan), tanpa pengaruh negatif terhadap kualitas fisikokimia buah.Kata kunci: cooling chamber, citrus color index, jeruk tropika, karotenoid, klorofil
KEANEKARAGAMAN DAN PATOGENISITAS FUSARIUM SPP. ASAL BEBERAPA KULTIVAR PISANG Sari, Widya; Wiyono, Suryo; Nurmansyah, Ali; Munif, Abdul; Poerwanto, Roedhy
Jurnal Fitopatologi Indonesia Vol 13 No 6 (2017)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1079.575 KB) | DOI: 10.14692/jfi.13.6.216

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Fusarium wilt disease caused by pathogenic fungus F. oxysporum f. sp. cubense is an important disease in banana plants. This research was aimed to identifiy Fusarium spp. collected from banana plants showing wilt disease based on morphology and molecular characters.  The fungi isolates obtained was further examined for its pathogenicity and distribution in various parts of banana plants.  Based on morphological characters, i.e. growth rate, total conidia, colony color, macroconidium, microconidium, and chlamydospores, F. oxysporum f. sp. cubense can be differentiated from other species of Fusarium, but not the strain. Molecular analysis using specific primers VCG 01213/16 and Foc1/Foc 2 successfully identified 13 and 7 isolates of F. oxysporum f. sp. cubense TR4 and F. oxysporum f. sp. cubense non TR4, respectively.  Analysis using universal primer ITS4/ITS5 identified 7 isolates of F. solani, 1 isolate of F. verticillioides, and 2 isolates non Fusarium.  Infection of F. oxysporum f. sp. cubense TR4 and non-TR4 were found mostly in pseudo stems, whereas F. solani and F. verticillioides dominantly colonized banana corm. Pathogenicity test showed that F. oxysporum f. sp. cubense TR4 and non-TR4 caused necrosis on corm of cv. Ambon Kuning.  Similar necrosis symptom was also observed on infection of F. solani but with less severity.
WE INVESTIGATED THE EFFECT OF SECTOR (POSITION IN CANOPY) ON TRANSLOCATION AND DISTRIBUTION OF 13C-PHOTOSYNTHATES IN  MANGOSTEEN TREES AND RELATED THE FINDINGS TO PREVIOUS ANALYSES OF FRUIT QUALITY. OUR EXPERIMENT WAS CONDUCTED ON THREE 25-YEAR-OLD MANGOSTEEN TREES. TREE CANOPIES WERE DIVIDED INTO 9 SECTORS BASED ON HEIGHT (BOTTOM, MIDDLE, TOP) AND WIDTH (INNER, CENTER, OUTER). ONE BRANCH FROM EACH SECTOR WAS LABELED WITH 13CO2 IN DECEMBER 2003. IMMEDIATELY AFTER LABELING, 13C CONCENTRATION IN Setiawan, Eko; Poerwanto, Roedhy; Fukuda, Fumio; Sugiyama, Nobuo; Saitoh, Kuniyuki; Kubota, Naohiro
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 2 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v40i2.6375

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We investigated the effect of sector (position in canopy) on translocation and distribution of 13C-photosynthates in  mangosteen trees and related the findings to previous analyses of fruit quality. Our experiment was conducted on three 25-year-old mangosteen trees. Tree canopies were divided into 9 sectors based on height (bottom, middle, top) and width (inner, center, outer). One branch from each sector was labeled with 13CO2 in December 2003. Immediately after labeling, 13C concentration in leaves from middle sectors was higher than that in leaves from other positions. 13C concentration in all leaves decreased rapidly for 24 h after 13C feeding, followed by a gradual decrease. In contrast, 13C concentration increased over time in the pericarp and aril of fruits. Translocation of 13C-photosynthates into fruit was high in Sectors 4 and 5, and in top positions (Sectors 7 to 9). At 96 h after 13C feeding, the highest distribution ratio of 13C-photosynthates was observed in stems, followed in descending order by pericarp, leaf, and aril. 13C distribution ratio in the aril was generally highest in fruits from inner and center positions. The relationship between partitioning of photosynthates and quality of mangosteen fruit, which differs among sectors, has been discussed. Keywords: fruiting positions, Garcinia mangostanaL., photosynthate partitioning, 13C, tree branches
ANALISIS KEDEKATAN HUBUNGAN ANTAR GENOTIPE PEPAYA BERDASARKAN KARAKTER MORFOLOGI DAN BUAH Suketi, Ketty; Poerwanto, Roedhy; Sujiprihati, Sriani; Sobir, ,; Widodo, Winarso D.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 38 No. 2 (2010): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.631 KB) | DOI: 10.24831/jai.v38i2.1797

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<!-- /* Font Definitions */ @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin-top:0cm; margin-right:0cm; margin-bottom:10.0pt; margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:Calibri; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman"; mso-ansi-language:IN; mso-no-proof:yes;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> A study was conducted to determine the variation and relationships among  papaya genotypes based on morphological and fruit characteristics  in order to produce  high quality papaya fruits. Fruit characterization study is very useful for genotype improvement and genotype classi?  cation of papaya. In this study the morphological characters of 36 genotypes were analyzed to determine their phenotypic variabilities.  The relationships between genotypes based on all of the morphological and fruit characteristics were tested by subjecting the data to multivariate principal component analysis and to cluster analysis. Based on the dendrogram generated from vegetative and generative characters, the 36 genotypes could be grouped into 11 clusters on a threshold of 1.6 and formed 6 clusters on a threshold of 1.8.  The dendrogram was able to explain the close relationship between IPB 5 x IPB 1 and IPB 5 x IPB 4, IPB 2 and IPB 7, IPB 1 and IPB 3 genotype. The scattered diagram of generative variable divided the papaya genotypes into three groups based on fruit sizes i.e small group (IPB 1, IPB 3, IPB 4, IPB 3 x IPB 4, IPB 1 x IPB 9), medium group (IPB 5, IPB 7, IPB 8, IPB 9) and big group (IPB 2, IPB 10).  The IPB 1, IPB 3 and IPB 4 were different from IPB 2 in fruit shapes, petal length of male ?  owers, in? orescence size and fruit length. The hybrid plants obtained from crossings with IPB 10 were different from the other genotypes in the colours of female-, hermaphrodite-, and male ?  ower-lobes. Subsequently the scatter diagrams also revealed that several genotypes i.e. IPB 2 x IPB 6, IPB 1 x IPB 5,  IPB 1 x IPB 9, IPB 5 x IPB 1 and IPB 5 x IPB 2 had superior characters  ideotype similar to IPB 1, IPB 3 and IPB 8 genotypes. Keywords: Carica papaya, hermaphrodite, female, dendrogram, scatter diagram, ideotype
AKUMULASI DAN DISTRIBUSI BAHAN KERING PADA BEBERAPA KULTIVAR KACANG TANAH Purnamawati, Heni; Poerwanto, Roedhy; Lubis, Iskandar; Yudiwanti, ,; Rais, Sri Astuti; Manshuri, Ahmad Ghozi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 38 No. 2 (2010): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.307 KB) | DOI: 10.24831/jai.v38i2.1793

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<!-- /* Font Definitions */ @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin-top:0cm; margin-right:0cm; margin-bottom:10.0pt; margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:Calibri; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman"; mso-ansi-language:IN; mso-no-proof:yes;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> This research was carried out in April–September 2007. The research objective was to study the dry matter distribution pattern of several peanut cultivars. Twenty cultivars were planted at two different locations, Cikarawang and Sawah Baru Experimental Field but at the same elevation (250 m above sea level). The cultivars were scored according to morphological and physiological characters, total N and total non-structural carbohydrates (TNC), yield and yield components.  There were no statistically differences in pod yield, seed yield and harvest index between the cultivars, but there were differences in dry matter distribution between cultivars. TNC content in stem correlated positively with pod ?  lling. Carbohydrates for pod ?  lling presumed were derived from dry matter accumulation in early pod ?  lling stage. It was concluded that the ideal growing type of peanut are early accumulated dry matter but almost no increase of dry matter accumulation in upper part of plant during seed development. Keywords:  dry matter distribution, pod ? lling, peanut
KARAKTER FISIK DAN KIMIA BUAH PEPAYA PADA STADIA KEMATANGAN BERBEDA Suketi, Ketty; Poerwanto, Roedhy; Sujiprihati, Sriani; Sobir, ,; Widodo, Winarso Drajad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 38 No. 1 (2010): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (153.04 KB) | DOI: 10.24831/jai.v38i1.1678

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The objective of the experiment was to investigate the physical and chemical characteristics of three stadia of maturity based on a range of peel color from green to yellow or based on percentage of the yellow area of fruit peel (stadium 1 = 25-49 % yellow, stadium 2 = 50-74 % yellow, and stadium 3 = above 75 % yellow) on six genotypes of papaya. Each genotype exhibited different days to maturity for each stadium. The fruits of stadium 1, 2 and 3 for IPB 1 were picked at 130, 135, and 140 days after anthesis (DAA); IPB 10A at 160, 165, and 170 DAA;  IPB 1 x PB 174 at 135, 140 and 145 DAA; while PB 174,  IPB 1 x IPB 10A and IPB 10A x PB 174 were picked at 140, 145 and 150 DAA, respectively. The results indicated that peel firmness was affected by maturity stage on female fruit of IPB 10A. Maturity stage affected chemical characteristics of papaya included total soluble solids (TSS) content (IPB 10A, female fruit of  PB 174, female fruit of IPB 1 x IPB 10A, and female fruit of IPB 1 x PB 174), vitamin C content (hermaphrodite fruit of 10 A, female fruit of IPB 1 x IPB 10A) and juice pH (hermaphrodite fruit of  IPB 1).  IPB 1 genotype can be harvested at all stadia of maturity stage. Hermaphrodite and female fruit of IPB 10 A, female fruit of  PB 174, female fruit of  IPB 1 x IPB 10A and female fruit of IPB 1 x  PB 174 genotype would be better harvested at stadium 3 of maturity stage.   Keywords: Carica papaya, papaya genotype, hermaphrodite fruit, female fruit, fruit quality, fruit maturity stage
PENINGKATAN PEMBUNGAAN DAN HASIL BIJI BAWANG MERAH VARIETAS BIMA MELALUI VERNALISASI DAN APLIKASI GA3 Fahrianty, Dian; Poerwanto, Roedhy; Widodo, Winarso Drajad; Palupi, Endah Retno
Jurnal Ilmu Pertanian Indonesia Vol. 25 No. 2 (2020): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.42 KB) | DOI: 10.18343/jipi.25.2.245

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The low production of true seed of shallot (TSS) is mostly caused by a low flowering rate. The research was aimed to increase the flowering rate and seed yield in lowland (240 masl) and highlands (1250 masl) by vernalization and submersion of the seed bulbs in GA3 before planting. The research was arranged in a completely randomized block design with 2 factors and replicated four times. The first factor was vernalization, i.e. without and with vernalization at 10±2°C for 30 days, and the second factor was the submersion of the seed bulbs following vernalization in GA3 at the concentrations of 0, 100, and 200 ppm for 1 h. Parameters measured were time of 50% flowering (days after planting), percentage of flowering plants, number of umbel per plant, number of floret per umbel, fruitset, seed weight per umbel and per plant, as well as the percentage of seed germination. The result suggested that when production of TSS of var. Bima is to be carried out in the lowland then the seed bulbs had to be vernalized at 10±2°C for 30 days which will increase the flowering percentage and seed yield. If the production of TSS is to be carried out in the highland then vernalization at 10±2°C for 30 days will increase the flowering percentage and seed yield. However, if for any reason vernalization is impossible to proceed then the submersion of the seed bulbs in 100 ppm GA3 for 1 h was sufficient to increase the flowering percentage and seed yield. The produced seeds (TSS) either in the low as well as in the highlands had high germination percentages. Keywords: germination, highland, lowland, umbel, true seed of shallot
PRODUKTIVITAS DAN KUALITAS BUAH MANGGIS (GARCINIA MANGGOSTANA L.) DI PURWAKARTA Setiawan, Eko; Poerwanto, Roedhy
Agrovigor Vol 1, No 1 (2008): SEPTEMBER
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (80.405 KB) | DOI: 10.21107/agrovigor.v1i1.227

Abstract

Indonesian mangosteen is a prospective product to be exported to Europe, Middle East, East Asia such as Taiwan, Hong Kong, Singapore, and Japan. Indonesian exported commodities increase significantly from year to year, but the increasing volume was not followed by an improvement in the production and quality of the fruit.  Mangosteen has symmetrical branches that form a dense canopy that protect sun radiation intensity to penetrate, and it keeps the radiation intensity remain below normal of its need. Most of the harvested mangosteen plants owned by the community were not managed properly. It causes the production and quality of the fruit below standard. The research aims at (1) knowing the position of the buds and fruit at various branches within the canopy, (2) collecting information about the distribution of production and quality of the fruit. The research was done from September 2003 to May 2004 at the center of mangosteen fruit production in west Java, i.e. Sub-district of Wanayasa, District of Purwakarta.  The research was done on randomized complete block design which consists of nine sectors of branches with seven replications. The nine sectors are sector 1 (inner bottom canopy), sector 2 (center bottom canopy), sector 3 (outer bottom canopy), sector 4 (inner middle canopy), sector 5 (center middle canopy), sector 6 (outer middle canopy), sector 7 (inner top canopy), sector 8 (center top canopy), sector 9 (outer top canopy). The result of research showed that the most frequent emergence of bud and fruit in Wanayasa was found in sector 3 (outer bottom canopy), sector 4 (inner middle canopy) and sector 5 (center middle canopy). Sector 6 (outer middle canopy), produce more vegetative branches. Dense canopy structure of upper branches has protect inner and bottom canopy from light availability. On average, the quality of the fruit is below standard. In Wanayasa, only 0.6-0.7% of the fruit meets the quality of Super SNI which produced especially on sector 4 and sector 5. At average, distribution of quality I  was about 8.8-18.2%; distribution of quality II was about 7.7-36.4%; and more than 50% of the production does not meet the quality standards. 
Co-Authors , Dorly , Lizawati , Sakhidin , Sobir , Sudarsono , Trikoesoemaningtyas , Yudiwanti . DARMAWAN . SUDARSONO . SUHARSONO ABDUL MUNIF Abdul Qadir Achmad Surkati AGUS PURWITO Ahmad Ghozi Manshuri Ahmad Ghozi Mansyuri Ahmad S. Abidin Akmal, Ajmir Ali Nurmansyah Anas D Susila Anas D. Susila Anas Dinurrohman Susila ANDRIA AGUSTA Ansyori, . Asmini Budiani Bambang S . Purwoko Bambang S. Purwoko Bambang Sapta Purwoko Cenra Intan Hartuti Tuharea CICIK SURIANI D Fatria Darda Efendi DEDY DURYADI DEWI SUKMA DIDY SOPANDIE Djoko Santoso DORLY DORLY E Efendi, E Edi Santosa Eko Setiawan Endah Retno Palupi Endang Gunawan Fahrianty, Dian Fauziyah Harahap Fumio Fukuda H., Nian Rimayanti HAJRIAL ASWIDINNOOR Hanifah Muthmainnah, Hanifah Heni Purnamawati Hiroshi Inoue I Hidayati, I I MADE ARTIKA I NYOMAN RAI Iman Rusmana Inanpi Hidayati Sumiasih, Inanpi Hidayati Indah Wulandari Iskandar Lubis Jawal Muhammad Anwarudinsyah Juanasri, Juanasri JULIARNI JULIARNI Jumawati, Riana Kasutjianingati . Ketty Suketi Kuniyuki Saitoh Kurniadinata, Odit F. Kurniawan, Vandra La Ode Safuan Latifah K. Darusman LATIFAH KOSIM DARUSMAN Lukman Liferdi Maulana, Mohamad Akhbar Maulana, Mohamad Akhbar Memen Surahman Muhammad Arif Nasution Muhammad Darmawan, Muhammad Nadhirah Karimatul Ilmi, Nadhirah Karimatul Naohiro Kubota Nobuo Sugiyama Nono Sutrisno Nur Wahyu Sariningtias, Nur Wahyu Nurfitri Ramadhani, Nurfitri Nurul Khumaida Odit Ferry Kurniadinata, Odit Ferry Rahmat Budiarto Ramdan Hidayat Rd. Selvy Handayani Resa Sri Rahayu, Resa S Susanto SAMANHUDI, . Septirosya, Tiara Slamet Susanto Soaloon Sinaga Sobir Sobir SOEKISMAN TJITROSEMITO Sri Astuti Rais Sri Yuliani SRIANI SUJIPRIHATI Suci Rahayu SUDIRMAN YAHYA SURYO WIYONO Sutrisno sutrisno T Purnama Tanari, Yulinda Taruna Shafa Arzam, Taruna Shafa Tetty Chaidamsari, Tetty Tiara, Dede Titin Purnama Tri Muji Ermayanti Widodo . Widya Sari Winarso D. Widodo Winarso D.Widodo, Winarso Winarso Dradjad Widodo Winarso Drajad Widodo Y A Purwanto, Y A Yunita, Roza Yunus, Ismadi