Sri Listiyowati
Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Darmaga Campus, Bogor 16680

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HUBUNAGN KEMAMPUAN PERGANTIAN INANG DENGAN PLASTISITAS GENETIKA PADA CENDAWAN BLAS PADI (PYRICULARIA GRISEA) Listiyowati, Sri; Widyastuti, Utut; Rahayu, Gayuh; Hartana, Alex; Jusuf, Muhammad
Jurnal Ilmu Pertanian Indonesia Vol. 14 No. 2 (2009): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1504.563 KB)

Abstract

The Digitaria ciliaris, wild grass grown around rice field, was a host for Pyricularia grisea (Cooke) Sacc., the fungi caused blast disease of rice. This fungi have a specific mechanism to regenerate new genetic variation in its life cycle. The aim of this research is to study the relation between the ability of the fungi to infect different species of host with its genetic plasticity. It was used three SCAR molecular markers Cutl, Pwl 1 and Erg2. P. grisea isolates (Dc4J1) originated from D. ciliaris at Jasinga-Bogor were able to infect rice cultivars Kencana Bali and Cisokan. The original Dc4Jl, from D. ciliaris, and the Dc4Jl that were reisolated from the infected rice cultivars (reisolates-1) had the same ability to infect Kencana Bali and Cisokan. Molecular technique showed that there was a different molecular marker genotype between the original Dc4J1, from D. ciliaris, and the Dc4Jl reisolated from infected rice cultivars. The original Dc4J1 owned Cutl but did not Pwl2 in contrary the reisolates Dc4J1 from rice cultivars (reisolates-1) had Pwl2 but did not Cutl. The Erg2 presented in both the original and the reisolated Dc4Jl. These results indicated that there were a change of genotype of P. grisea at the same time with the change of host species. The Dc4Jl isolates originated from Kencana Bali and Cisokan (reisolates-2) that were infected by reisolate-1, had the same genotype with the reisolates-1.
KERAGAMAN CENDAWAN PASCAPANEN PADA UMBI BAWANG MERAH VARIETAS BIMA BREBES Dharmaputra, Okky Setyawati; Listiyowati, Sri; Nurwulansari, Ira Zahara
Jurnal Fitopatologi Indonesia Vol 14 No 5 (2018)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (451.217 KB) | DOI: 10.14692/jfi.14.5.175

Abstract

Diversity of Postharvest Fungi on Shallot Bulbs Variety Bima BrebesIn Indonesia, shallot (Allium ascalonicum) is horticultural main commodity after hot pepper. Significant yield losses can be caused by postharvest fungi infection. Research on the diversity of postharvest fungi on shallot bulbs has been conducted in some countries, unfortunately little is done in Indonesia. The study was aimed to obtain information on the diversity of postharvest fungi infecting shallot bulbs variety Bima Brebes from several traditional markets in Bogor City. Shallot bulbs were collected in January and February 2016. The study consisted of fungal isolation from shallot bulbs, fungal pathogenicity test, and identification of pathogenic fungi based on morphological and molecular characteristics. Morphology identification was based on the color of fungal colony, growth pattern, as well as somatic and reproduction structures. Several species of pathogenic fungi were successfully identified from shallot bulbs i.e. Alternaria alternata, Aspergillus niger, Colletotrichum gloeosporioides species complex, Fusarium fujikuroi species complex, F. oxysporum, F. solani, Penicillium citrinum and P. pinophilum.  Among these fungi, the highest pathogenicity was shown by C.  gloeosporioides species complex.
Potensi Cendawan Asal Hydrilla verticillata Sebagai Pengendali Hayati Fusarium oxysporum dan Ganoderma boninense ARIYANI, ASTRI; SUKARNO, NAMPIAH; LISTIYOWATI, SRI
Jurnal Sumberdaya Hayati Vol 5, No 2 (2019)
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.5.2.%p

Abstract

Hydrilla verticillata is an aquatic weed, can build symbiosis and also become a substrate of freshwater fungi. Some of freshwater fungi that live in association with H. verticillata are pathogenic fungi which were potentially used as controller for Fusarium oxysporum and Ganoderma boninense. The use of pathogenic fungi as a biocontrol is not consistent in the field. Therefore, this research aimed to find new fungus candidates that are stronger and more consistent in controlling pathogenic fungi. Freshwater fungi were isolated from H. verticillata. Identification was based on morphological characters. Molecular analysis was carried out for freshwater fungi which had the highest inhibition percentage to pathogenic fungi. The antagonism test was conducted by dual culture method. The mechanism of interaction of hyphae was observed under a microscope. Freshwater fungi was derived from H. verticillata stem are Aspergillus section flavi, Gliomastix sp., and Talaromyces sp. Antagonism test results showed that all fungi could inhibit the growth of pathogenic fungi. Based on molecular analysis used ITS region showed Talaromyces sp. could not identify to the level of species so that additional genes were required, namely beta-tubulin gene, in order to further identify Talaromyces sp.