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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology REINWARDTIA
Sri Sudarmiyati Tjitrosoedirjo, Sri Sudarmiyati
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Veterinary

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FOUR NEW TAXA OF ASTERACEAE IN SUMATRA Tjitrosoedirjo, Sri Sudarmiyati
REINWARDTIA Vol 12, No 1 (2002): Vol. 12, No. 1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.54 KB) | DOI: 10.14203/reinwardtia.v12i1.93

Abstract

TJITROSOEDIRDJO, SRI S. 2002. Four new taxa of Asteraceae in Sumatra. Reinwardtia 12(1): 125–128. ? Four new taxa of Asteraceae in Sumatra are described: Prenanthes L. (2 species), Senecio L. (1 species) and Emilia sonchifolia (L.) DC. (1 variety).
NOTES ON THE PROFILE OF INDONESIAN INVASIVE ALIEN PLANT SPECIES Tjitrosoedirjo, Sri Sudarmiyati
BIOTROPIA Vol. 14 No. 1 (2007): BIOTROPIA Vol. 14 No. 1 June 2007
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2007.14.1.25

Abstract

An alien species, which becomes established in natural or semi-natural ecosystems or habitas, is an agent of change and threatens native biological diversity.  The Convention on Biological Diversity (CBD) declared in 1992, in which the issue on invasive alien species was raised, was ratified by the Indonesian Government in 1994.  Protecting our biodiversity will be our moral obligation to comply with CBD.  Inventory on the invasive alien plant species in Indonesia should be done by field surveys aside from the data collected from the references and herbarium specimens.  Field studies should be carried out to get complete figures, to identify the new ones, to determine their distributions, to plan their management including prevention to spread, containment and movement or mitigate their impact to environment.  Sometimes it is difficult in determining whether the plants are aliens or not. Cooperation with botanists and taxonomists in other parts of the world is necessary.  There are some species of invasive aliens plant in Indonesia, which have to be watched for their aggressiveness i.e. Acasia nilotica (L.) Willd. ex Del., Eupatorium sordidum Less., Jatropa gossipifolia L., Mikania micrantha Kunth, Mimosa pigra L., Opuntia sp., and Piper aduncum L. have to be watch for their aggressiveness.  Notes on some important invasive alien plant species are discussed.
ANTIMICROBIAL AND HERBICIDAL PROPERTIES OF THE FRUTICOSE LICHEN Ramalina FROM GUIMARAS ISLAND, PHILIPPINES Gazo, Shenly Marie Tobias; Santiago, Krystle Angelique Aguda; Tjitrosoedirjo, Sri Sudarmiyati; dela Cruz, Thomas Edison E.
BIOTROPIA Vol. 26 No. 1 (2019): BIOTROPIA Vol. 26 No. 1 April 2019
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7192.328 KB) | DOI: 10.11598/btb.2019.26.1.836

Abstract

Lichens, a unique symbiosis between a mycobiont and a photobiont organism, are known to produce metabolites that can be tapped as biopesticides for agriculture. Such property of the fruticose lichen Ramalina collected within Guimaras Island, Philippines was investigated in this study. A total of 195 specimens were collected and characterized using conventional morphological and chemical analyses. These lichens were identified as Ramalina farinacea, R. roesleri, and R. nervulosa. To test their potential application in agriculture, nine lichen specimens were extracted with acetone and assayed for its inhibitory activities against test bacteria, fungi, and weedy plants. All nine lichen extracts inhibited Pseudomonas aeruginosa (>19 mm ZOI) while only seven lichen extracts inhibited Staphylococcus aureus (13–19 mm ZOI). No inhibitory activity was observed among the fungal plant pathogens Fusarium oxysporum, F. solani, F. verticillioides, Colletotrichum capsici, and C. gleosporioides, and on the Gram-negative bacteria Escherichia coli and Pectobacterium carotovorum var. carotovorum. A decrease in the root (up to 27% reduction) and shoot (up to 39% reduction) lengths, and leaf chlorophyll content (up to 44% reduction) of rice weeds Fimbristylis miliacea, Leptochloa chinensis and weedy rice (Oryza sp.) were also observed. These results, therefore, suggested that the lichen crude extract from Ramalina is a potential biological control for weed management.
Co-Authors dela Cruz, Thomas Edison E. Gazo, Shenly Marie Tobias Santiago, Krystle Angelique Aguda