Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal HAYATI Journal of Biosciences BIODIVERS - BIOTROP Scientific Magazine
SOEKISMAN TJITROSEMITO
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Energy Environmental Science

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Secretory Duct Structure and Phytochemistry Compounds of Yellow Latex in Mangosteen Fruit DORLY DORLY; SOEKISMAN TJITROSEMITO; ROEDHY POERWANTO; JULIARNI JULIARNI
HAYATI Journal of Biosciences Vol. 15 No. 3 (2008): September 2008
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.533 KB) | DOI: 10.4308/hjb.15.3.99

Abstract

Yellow latex is the main problem in mangosteen agribusiness, because it is one factor lowering the fruit quality. The structure of yellow latex secretory ducts in the flower and fruit as well as in the root, stem and leaf of mangosteen (Garcinia mangostana L.) seedling and the qualitative phytochemistry of yellow latex were studied. The ducts were branched, canal-like type. They were found in the exocarp, mesocarp, endocarp, aril of the fruit, flower, stem, and leaf. In the fruit, the biggest diameter of the secretory ducts was found in the endocarp. There were continuous secretory ducts from fruit stalk to the fruit. Ultrastructural observation showed that the ducts surrounded by specific epithelial cells, which were living cells containing dense cytoplasm with plastid, mitochondria and golgi apparatus organelles. The qualitative test indicated that the yellow latex collected from stem bark, outer part of fruit, young fruit pericarp, mature aril and young aril contained terpenoid, flavonoid and tannin, but not alkaloid, saponin and steroid, except in the young aril containing the steroid. Key words: secretory ducts, yellow latex, endocarp, aril, epithelial cells
Tolerance Levels of Roadside Trees to Air Pollutants Based on Relative Growth Rate and Air Pollution Tolerance Index SULISTIJORINI RINI; ZAINAL ALIM MASUD; NIZAR NASRULLAH; AHMAD BEY; SOEKISMAN TJITROSEMITO
HAYATI Journal of Biosciences Vol. 15 No. 3 (2008): September 2008
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (66.094 KB) | DOI: 10.4308/hjb.15.3.123

Abstract

Motor vehicles release carbon monoxide, nitrogen dioxide, sulphur dioxide, and particulate matters to the air as pollutants. Vegetation can absorb these pollutants through gas exchange processes. The objective of this study was to examine the combination of the relative growth rate (RGR) and physiological responses in determining tolerance levels of plant species to air pollutants. Physiological responses were calculated as air pollution tolerance index (APTI). Eight roadside tree species were placed at polluted (Jagorawi highway) and unpolluted (Sindangbarang field) area. Growth and physiological parameters of the trees were recorded, including plant height, leaf area, total ascorbate, total chlorophyll, leaf-extract pH, and relative water content. Scoring criteria for the combination of RGR and APTI method was given based on means of the two areas based on two-sample t test. Based on the total score of RGR and APTI, Lagerstroemia speciosa was categorized as a tolerant species; and Pterocarpus indicus, Delonix regia, Swietenia macrophylla were categorized as moderately tolerant species. Gmelina arborea, Cinnamomum burmanii, and Mimusops elengi were categorized as intermediate tolerant species. Lagerstroemia speciosa could be potentially used as roadside tree. The combination of RGR and APTI value was better to determinate tolerance level of plant to air pollutant than merely APTI method. Key words: air pollutants, tolerance of roadside trees, relative growth rate, physiological responses, air pollution tolerance index
Nitrogen Resorption and Nitrogen Use Efficiency in Cacao Agroforestry Systems Managed Differently in Central Sulawesi TRIADIATI TRIADIATI; SOEKISMAN TJITROSEMITO; EDI GUHARDJA; SUDARSONO SUDARSONO; IBNUL QAYIM; CHRISTOPH LEUSCHNER
HAYATI Journal of Biosciences Vol. 14 No. 4 (2007): December 2007
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (85.519 KB) | DOI: 10.4308/hjb.14.4.127

Abstract

Cacao agroforestry is a traditional form of agriculture practiced by the people of Central Sulawesi. These agroforestry systems vary from a simple system following selective cutting of forest trees, to a more sophisticated planting design. The cacao was planted under remaining forest covers (CF1), under planted trees (CF2), and between shade trees Gliricidia sepium (CP). The objectives of this study were to quantify nitrogen use efficiency (N NUE) and nitrogen resorption in cacao agroforestry systems. The N NUE at the ecosystem scale (N NUEES) for the cacao agroforestry systems were compared with the natural forest. The results showed that CP produced the highest litterfall and cacao foliar nitrogen. CP and CF1 produced litterfall and the nitrogen resorption that not were significantly different. In contrast, CF2 produced the lowest litterfall, hence required lower nitrogen supply. The nitrogen resorption of CF2 was less than that of CF1 and CP. However, N NUE in cacao plant (N NUEC) of CF2 was higher than that of the CP. The N NUEES of either CF1 or CF2 were similar to that of the natural forest, but higher than that of the CP. Using shade trees in cacao plantations increased foliar nitrogen concentration, nitrogen resorption, N NUEC and N NUEES; thus, might be one reason for a higher productivity of cacao in unshaded systems. Key words: cacao agroforestry system, cacao foliar nitrogen, nitrogen resorption, N NUE
BEKOL SAVANNA REHABILITATION BY CONTROLLING VACHELLIA NILOTICA WITH TRICLOPYIR AND DESIRED GRASSES REPLANTING Tjitrosemito, Soekisman; Irianto, Ragil; Garsetiarsih, Garsetiarsih; Setyawati, Titiek; Subiyakto, Atok; Susmianto, Adi
BIODIVERS - BIOTROP Science Magazine Vol. 3 No. 2 (2024): BIODIVERS Volume 3 No. 2 (2024)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56060/bdv.2024.3.2.2168

Abstract

Research works were carried out from 2012 – 2015 to investigate success of controlling broadleaved weed and trees of V.nilotica and planting desired grasses The tretments were combined 3 factors. Factor 1, was the way to apply triclopyr formulated as GARLON 670 EC to control trees of V.nilotica, (1). by brushing the solution of 1% GARLON 670 EC dissolved in diesel oil on the stump of V.nilotica after cutting using a chainsaw, and by (2). brushing at the base of intact standing tree of V. nilotica, from above the ground up to 30 cm height. Factor 2, was grasses (1). Dichanthium caricosum, and (2). Polytrias amaura planted ad 1 x 1 m2. Factor 3 was fertilizer, (1) planted grasses were fertilized with compost derived from goat feces at 100 gr/ single chunk planted, and (2) without fertilizer. The results indicated that grass grew better under the treatment of killing V.nilotica by cutting and brushing with 1% GARLON 670 EC dissolved in diesel oil, while fertilizing D.caricosum was much better to than of P.amaura.
Co-Authors , Triadiati AHMAD BEY Christoph Leuschner Dorly Dorly Edi Guhardja Garsetiarsih, Garsetiarsih IBNUL QAYIM Irianto, Ragil JULIARNI JULIARNI NIZAR NASRULLAH Roedhy Poerwanto Subiyakto, Atok Sudarsono Sulistijorini Susmianto, Adi Titiek Setyawati ZAINAL ALIM MASUD