I Gede Tirta
UPT Balai Konservasi Tumbuhan Kebun Raya "Eka Karya" Bali, LIPI Candikuning, Baturiti, Tabanan Bali 82191

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A study of essential oil from an invasive Piper aduncum L. Wibawa, I Putu Agus Hendra; Saraswaty, Vienna; Kuswantoro, Farid; Andila, Putri Sri; Wardhani, Putri Kesuma; Tirta, I Gede; Sujarwo, Wawan
Jurnal Biologi Udayana Vol 23 No 2 (2019): JURNAL BIOLOGI UDAYANA
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (448.621 KB) | DOI: 10.24843/JBIOUNUD.2019.v23.i02.p02

Abstract

An invasive Piper aduncum is a plant species that potentially produces essential oil. The study aims todetermine the percentage, phytochemical compounds, and anti-fungal properties of essential oil producedfrom the leaves and fruits of Piper aduncum. The study showed that the leaves and fruits of P. aduncumcontain 0.30% and 0.33% of essential oil, respectively. Apiol is the most abundant phytochemical compoundobtained in essential oil of leaves and fruits of P. aduncum with 57.10% and 66.31%, respectively. Weconclude that essential oil obtained in this study is able to inhibit the growth of both Aspergillus niger andCladosporium sp. but not for Fusarium oxysporum and Fusarium solani.
Distribution and Phytocomponent in the Ethanol Extract of Globba candida Gagnep. (Zingiberaceae) by GC-MS Analysis Andila, Putri Sri; Tirta, I Gede
Journal of Tropical Life Science Vol 9, No 1 (2019)
Publisher : Journal of Tropical Life Science

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Abstract

Globba is the third largest genera in the Zingiberaceae family, distributed in tropical and sub-tropical regions with the center of biodiversity in Southeast Asia. The study about phytochemical contents Globba is an interesting especially Globba candida Gapnep which have been never reported. The aims of this study were to observe distribution and phytochemical compounds of ethanol extract of G. candida Gapnep. found on Bali Island. Hydrodistillation was used to determine the presence of its essential oil and a Gas Chromatography-Mass Spectrometry (GC-MS) was used to carry out the phytochemical analysis of the essential oil and ethanol extracts of G. candida Gapne. The phytochemical analysis of the rhizomes and leaves ethanol extracts of G. candida Gapnep revealed 36 and 8 identified chemical compounds representing 85,82% and 85,47% of the total analyzed extracts. However, there was no essential oil constituent found in G. candida Gapnep. The main compounds of the rhizome extract of G. candida Gapnep were levoglucosan 19.07%, allylhydrazone acetaldehyde 5.52%, trans-2,3-epoxybutane 6.30%, butan-3-enoic acid methyl ester 4.36%, 2-methylcyclopentanone 4.02%, and 2-n-propyl-oxetan 4.00%. While the dominant contents of the leaves extract of G. candida Gapnep were pinostrobin chalcone 75.63%.
STUDI ANGGREK EPIFIT PADA TIGA LOKASI DI KABUPATEN MALINAU, KALIMANTAN TIMUR Tirta, I Gede; Lugrayasa, I Nyoman; Irawati, Irawati
Buletin Kebun Raya Vol 13, No 1 (2010): Buletin Kebun Raya Vol. 13 (1) Januari 2010
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

A study on epiphytic orchids in three locations (Senturan Forest, Mount Sidi and Mount Jarang) in Malinau District showed that most epiphytic orchids were found in location with moderate light intensity rather than in low and high light intensities. Many orchids were found on parts of trees covered by thin mosses rather than on thick mosses. Three hundred and seventy one orchid specimens were collected from the three locations and at least 71 specimens were new collections to Eka Karya Botanic Garden, Bedugul.
STUDI ANGGREK EPIFIT PADA TIGA LOKASI DI KABUPATEN MALINAU, KALIMANTAN TIMUR Tirta, I Gede; Lugrayasa, I Nyoman; Irawati, Irawati
Buletin Kebun Raya Vol 13, No 1 (2010): Buletin Kebun Raya Vol. 13 (1) January 2010
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

A study on epiphytic orchids in three locations (Senturan Forest, Mount Sidi and Mount Jarang) in Malinau District showed that most epiphytic orchids were found in location with moderate light intensity rather than in low and high light intensities. Many orchids were found on parts of trees covered by thin mosses rather than on thick mosses. Three hundred and seventy one orchid specimens were collected from the three locations and at least 71 specimens were new collections to Eka Karya Botanic Garden, Bedugul.
STUDY AUTEKOLOGI PRANAJIWA (Euchresta horsfieldii (Lesch.) Benn.) DI BUKIT PENGELENGAN, DESA PANCASARI, KECAMATAN SUKASADA, KABUPATEN BULELENG, BALI Darma, I Dewa Putu; Tirta, I Gede; Ardaka, I Made
Buletin Kebun Raya Vol 14, No 1 (2011): Buletin Kebun Raya Vol. 14 (1) January 2011
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Pranajiwa (Euchresta horsfieldii (Lesch.) Benn) is a medicinal plant, which is growing wild and it is regarded as a rare plant. Currently, its existence in the wild increasingly threatened. Pengelengan Hill is one of the natural habitats of E. horsfieldii in Bali. Study of autecology aims to describe the ecology of E. horsfieldii in their natural habitat. E. horsfieldii was found abundant in plots II with 16.02% relative density, 9.68% of relative frequency and 25.69 of Important Value, grow clumped together with other plants (Idk 2.72).