Sri Darmanti
Jurusan Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Jl. Prof. Soedarto, SH, Tembalang, Semarang

Published : 34 Documents
Articles

Found 34 Documents
Search

PENGARUH LAMA PERENDAMAN DAN KONSENTRASI ASAM SULFAT (H2SO4) TERHADAP PERKECAMBAHAN BENIH JATI (TECTONA GRANDIS LINN.F) Suyatmi, Suyatmi; Hastuti, Endah Dwi; Darmanti, Sri
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 19, No 1 (2011) : Volume XIX, Nomor 1, Maret 2011
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (652.416 KB) | DOI: 10.14710/baf.v19i1.2581

Abstract

The Aims of the research to determine the effect of soaking time and concentration of H2SO4 on the germination of seeds jati (Tectona grandis Linn. f). The research using a Completely Randomized Design (CRD) with factorial pattern   3 x 4. Factor I is a long time soaking (W1: 20 minutes, W2: 30 minutes and W3: 40 minutes), factor II is the concentration of H2SO4 (K0: 0%, K1: 70%, K2: 80% and    K3: 90%). Each treatment with three replications. The data obtained were analyzed by ANAVA at 95% significance level, followed by Duncan's test at the 95% test level. Parameters observed were: the percentage of germination (%),hipokotil seedling length (cm), radicels seedling length (cm) and seedling dry weight (gr). The results showed there were interactions between treatment long time soaking and H2SO4 concentration on the percentage of seed germination of jati. Interaction treatment 70% H2SO4 concentration on the length of soaking of 30 and 40 minutes showed the highest percentage germination. Seeds that capable to germinate under thus treatment the seedling growth is not affected by treatment.
PENGARUH PENYIRAMAN AIR CUCIAN BERAS FERMENTASI SATU HARI DAN FERMENTASI LIMA BELAS HARI TERHADAP KADAR PIGMEN FOTOSINTETIK DAN PERTUMBUHAN VEGETATIF TANAMAN SAWI HIJAU (BRASSICA JUNCEA L.) Fadilah, Aprilia Nurul; Darmanti, Sri; Haryanti, Sri
Bioma : Berkala Ilmiah Biologi Vol. 21, No 1, Tahun 2019
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (63.011 KB) | DOI: 10.14710/bioma.21.1.47-54

Abstract

Mustard plants are a type of vegetable favored by most people. Demand formustard plants continues to increase along with the increasing population and awareness of nutritional needs, but there are obstacles in increasing the production. This is due to the lack of nutrients needed by the mustard plant for its growth. One effort to increase the production of mustard plants is by adding nutrients through fertilization. Fertilizers are divided into two types, namely organic and inorganic fertilizers. However, long-term use of inorganic fertilizers can reduce soil quality and environmental health. One alternative to overcome these problems is to use liquid organic fertilizer in the form of fermented rice washing water. This study aims to determine the effect of 1-day fermented rice washing water and 15-days fermented rice washing water at different concentrations on photosynthetic pigment content and vegetative growth of green mustard plants and find out the best dose of rice washing water for the growth of green mustard plants. The study used a Completely Randomized Design (CRD) of 1 factor with 5 treatments. Each treatment with 4 replications with ordinary water as a control, 1-day fermented rice washing water with the concentration of 50% and 100%, and 15-days of fermented rice washing water with the concentration of 50%, and 100%. The results showed that the watering on 1-day fermented rice washing water with the concentration of 50% and 100% and 15-days of fermented rice washing water with a concentration of 50% had no effect on all parameters but the watering of 15-days fermented rice washing water with a concentration of 100% had an effect on increasing the plant height, number of leaves, leaf area, plant fresh weight, and plant dry weight. The growth of mustard green plants (Brassica juncea L) is best obtained in the treatment of 15-days fermented rice washing water with a concentration of 100%.
PENURUNAN PERTUMBUHAN TAJUK KEDELAI [GLYCINE MAX (L.) MERR.] AKIBAT CEKAMAN GANDA INTERFERENSI TEKI (CYPERUS ROTUNDUS L.) DAN KEKERINGAN Darmanti, Sri
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 24, No 1 (2016): Volume 24, nomor 1, tahun 2016
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (309.88 KB) | DOI: 10.14710/baf.v24i1.11693

Abstract

Plants under stress conditions will decrease the  variety of physiological processes speed, so  the growth and production did not reach the genotypes potential. Weeds interference and drought stress that occurred simultaneously is one of obstacle in improving the soybean [Glycine max (L.) Merr.] production. Purple nutsedge (Cyperus rotundus L.) is the important weeds in soybean, invasive and difficult to eradicate. This research uses experimental method completely randomized design of two factors such as the level of water supply and the level of purple nutsedge interference. Each treatment unit, with five replications.  The aim of this research to determine  multiple stress of purple nutsedge  interference and drought stress effect to the decrease of soybean shoot growth. The results showed  that combination of three or six purple nutsedge interference with mild or severe drought stress causes a decrease of fresh weight, dry weight and length soybean shoot. The more weight the greater levels of stress decrease. The smallest decrease occurred in the shoot length parameter and successive increases in dry weight and wet weigh.   Keywords : multiple stress, Cyperus rotundus L., Glycine max (L.) Merr., growth, shoot
KEMAMPUAN MENGIKAT AIR OLEH TANAH PASIR YANG DIPERLAKUKAN DENGAN TEPUNG RUMPUT LAUT GRACILARIA VERRUCOSA Sinulingga, Maranatha; Darmanti, Sri
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 15, No 2 (2007): Volume XV, Nomor 2, Oktober 2007
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (82.911 KB) | DOI: 10.14710/baf.v15i2.2570

Abstract

Sand is media plant which was ability fasten the water absorb of very low. Sea weed of Gracilaria verrucosa pregnant of gel able to fasten water. This research aim to know of ability fasten waterby mixed sand with Gracilaria verrucosa flour at some comparations. Research use random device complete with 4 treatment, every treatment by 5 restating. Result of research indicate that ever greaterly of comparison of grass flour go out to sea to sand, hence juicy progressively able to be bound by sands.
PENGARUH ALELOKIMIA EKSTRAK TANAMAN PADI (ORYZA SATIVA L. VAR. IR64) TERHADAP PERKECAMBAHAN DAN PERKEMBANGAN KECAMBAH KEDELAI (GLYCINE MAX L.) Mahayaning, Fitrian Agna; Darmanti, Sri; Nurchayati, Yulita
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 23, No 2 (2015): Volume XXIII, Nomor 2, Oktober 2015
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (359.109 KB) | DOI: 10.14710/baf.v23i2.10021

Abstract

The aim of this research is to know the allelochemicals effect of  rice var. IR 64 residues extract on germination and growth soybean var. Grobogan seedling. This experiment  uses completely randomized factorial design (3x5). The fist factors is extract resources (root, straw, and hull) and secont factor is level concentration extrac (0%, 25%, 50%, 75%, dan 100%) with 5 replicates. Data analysed using ANOVA and DMRT.The results showed that allelochemicals from residue of rice IR 64 extract inhibit the germination and growth soybean var. Grobogan seedling, the higher concentration of the treatment the greater inhibition. Inhibition most likely caused by a hull rice extract.   Keywords: Glycine max, Oryza sativa, allelochemical, phenol  
PRODUKSI BIOMASSA TANAMAN NILAM (POGOSTEMON CABLIN) YANG DITANAM PADA INTENSITAS CAHAYA YANG BERBEDA Darmanti, Sri; Nurchayati, Yulita; Hastuti, Endah Dwi; Syaifuddin, Mochammad
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 17, No 1 (2009): Volume XVII, Nomor 1, Maret 2009
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (50.667 KB) | DOI: 10.14710/baf.v17i1.2532

Abstract

Patchouli oil is found in all vegetative part of Pogostemon cablin. Therefore, a high biomass is important to increase production of patchouli oil. Biomass production is on of plant growth indicator. Plant growth is a effected by genetic and environmental factor. Light intensity will effect to chlorophyl syntesis, photosynthetic rate, transpiration and hormonal balance. The aim of this research is to study effect of light intensity on biomass production of Pogostemon cablin. Design of research is CRD (Complete Randomized Design), with one factor which is light intensity. There were difference of light intensity that use astreatments. These are : 96 LUX, 340 LUX and 780 LUX. Each treatment was replicated five times. Result indicated that, light intensity affect biomass production of Pogostemon cablin. At light intensity of 96 LUX, biomass productions is the most optimum. An increase of light intensity, biomass production ofPogostemon cablin is reduction.
PENGARUH PERLAKUAN KONSENTRASI KALSIUM KLORIDA (CACL2) DAN LAMA PENYIMPANAN TERHADAP KADAR ASAM ASKORBAT BUAH TOMAT (LYCOPERSICUM ESCULENTUM MILL.) Rahmawati, Ita Setiani; Hastuti, Endah Dwi; Darmanti, Sri
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 19, No 1 (2011) : Volume XIX, Nomor 1, Maret 2011
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (638.081 KB) | DOI: 10.14710/baf.v19i1.2585

Abstract

The aims of this study to determine the effect of combined treatment CaCl 2 concentration and storage time on ascorbic acid concentrations and decrease of tomatoes fruit wight as well as knowing the CaCl2 concentration effect on the long shelf life. The research using CRD factorial pattern (4 x 3). Factor I is the concentration of CaCl2 (K0: 0 M, K1: 0.05 M, K2: 0.1 M and K3: 0.15 M), factor II is a long storage       (L1: 4 days, L2: 8 days and L3: 12 days) . The data obtained were analyzed by ANAVA at 95% significance level, followed by Duncan's test at the 95% test level. The parameter is observed levels of ascorbic acid (milligram/100gram) with iodine titration method, decrease of tomatoes fruit weight and long shelf life. The results showed the interaction between the concentration of CaCl 2 and storage time treatment on levels of ascorbic acid. CaCl2 0,1 M with 4-day old store treatment shows the amount of ascorbic acid is highest. CaCl2 treatment also affects to minimize decrease of the weight tomatoes fruit and prolong shelf life of tomatoes 5 to 8 days compared to controls.
PENEBALAN DINDING SEL XILEM TANAMAN KEDELAI [GLYCINE MAX (L.) MERR.] VAR. GROBOGAN AKIBAT CEKAMAN GANDA INTERFERENSI TEKI (CYPERUS ROTUNDUS L.) DAN KEKERINGAN Darmanti, Sri
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 23, No 2 (2015): Volume XXIII, Nomor 2, Oktober 2015
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (607.365 KB) | DOI: 10.14710/baf.v23i2.9999

Abstract

Anatomical changes are good indicators used to know influence environmental stress on plant. The objective of this research is to study the multiple stress effect of  purple nutsedge  (Cyperus rotundus L.) interference and drough on  the xylem cell wall thickening of stems, roots and leaves of soybean [Glycine max (L.) Merr.] Var. Grobogan. This research was carried out using two experimental Completely Randomized Designs (CRD) (3X3), i.e. purple nutsedge interference (control, three and six  purple nutsedge) and drought stress (control, mild and severe).  The results showed that  multiple stress  purple nutsedge interference and drought led to the addition of xylem cell wall thickness of stem, root  and leaves .The higher level of interference and drought, xylem cell walls thicker. Keyword :  multiple stress, ROS, phenolic compound, lignin, xylem.
PERLAKUAN DEFOLIASI UNTUK MENINGKATKAN PEMBENTUKAN DAN PERTUMBUHAN CABANG LATERAL JARAK PAGAR (JATROPHA CURCAS) Darmanti, Sri; Setiari, Nintya; Romawati, Tanti Dwi
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 16, No 2 (2008): Vol. XVI, No. 2, Oktober 2008
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (41.762 KB) | DOI: 10.14710/baf.v16i2.2589

Abstract

Jatropha is an alternative resource of sustainable energi. Therefore, to support the use of sustainable energi,an increase production of Jatropha seed is important. As Jatropha seeds (fruits) only growth at terminal andaxial bud, therefore the presence of lateral bud is necessary to increase production of Jatropha seed.Formation of lateral bud is affected by the balance between auxin and sitokinin. Defoliation will control thebalance of these two hormone. In this study, defoliation is conducted on seedling at the age of 4 month.Each treatment was replicated    7 times. Variabel were observed and ended after 6 month. Result indicatecthat either defoliation will stimulated the formation and growth of lateral bud.
PENGARUH SUHU PENGERINGAN TERHADAP KADAR AIR, KADAR FLAVONOID DAN AKTIVITAS ANTIOKSIDAN DAUN DAN UMBI RUMPUT TEKI (CYPERUS ROTUNDUS L.) Syafrida, Mulia; Darmanti, Sri; Izzati, Munifatul
Bioma : Berkala Ilmiah Biologi Vol. 20, No. 1, Tahun 2018
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (96.996 KB) | DOI: 10.14710/bioma.20.1.44-50

Abstract

Purple nutsedge (Cyperus rotundus) is one of the medicinal plants that are potential to be developed as one source of antioxidants. This plant is quite interesting to developed because it is cheap and easy to obtain. The part of  purple nutsedge that often used is the tuber, leaves have not been widely used, whereas it contains flavonoids that can be used as an antioxidant. Post harvest handling is very important, especially in drying method. Drying aims to get a simplicia that is not easily damaged so it can be stored for a long time. This research was aimed to study differences of water content, flavonoids and antioxidant activity in leaves and tubers to the effect of different drying temperatures. The experimental analysis of this research is a Completely Randomized Design of two factors: the influence of different drying temperature (control (± 27 ºC), 30 ºC, 40 ºC and  50 ºC) and different parts of organs (leaves and tubers) with each of the three time repetition. Parameters include the study of  water content, levels of flavonoids and antioxidant activity. Data were analyzed using ANOVA followed by Duncan?s test at the level of 95%. The results showed that there was no interaction between drying temperature and organ difference in water content, flavonoids and antioxidant activity of purple nutsedge. Leaves of purple nutsdege have flavonoids and antioxidant activity is higher than the bulb. Water content, flavonoids and antioxidant activity decreases with increasing drying temperature.Keywords: purple nutsedge (Cyperus rotundus L.), drying temperature,  flavonoids, antioxidant activity