Study on the diversity of endophytic communities from rice (Oryza sativa L.) and their antagonistic activities in vitro
Study on the diversity of endophytic communities from rice (Oryza sativa L.) and their antagonistic activities in vitro
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DOI：
10.1016/j.micres.2006.12.003
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发表时间：
2009-01-01
影响因子：
6.7
通讯作者：
Krishnamurthy, Y. L.
中科院分区：
文献类型：
--
作者：
Naik, B. Shankar;Shashikala, J.;Krishnamurthy, Y. L.
从2005年12月（冬季）和2006年4月（夏季）从印度南部巴德拉河项目区采集的2400个水稻片段中分离内生菌种群。在冬季，根和叶的定殖率分别为40.3%和25.83%，在夏季，根和叶的定殖率分别为20.15%和8.66%。19个不同的真菌分类群，链霉菌属和细菌，物种被分离。链霉菌属、内生真菌中球毛壳菌、产黄青霉、尖孢镰刀菌和枝孢枝孢霉占优势。不同地点、不同季节和不同水稻品种的侵染频率存在显著差异。双培养研究表明，C. globosum、产黄青霉和链霉菌是提取生物活性化合物的合适候选物。水稻内生微生物种类繁多，其中一些对病原真菌具有拮抗作用。(C)2007年，Elsevier GmbH。All rights reserved.
Endophytic populations were isolated from 2400 segments of Oryza sativa collected from Bhadra River Project Area, Southern India during December 2005 (Winter) and April 2006 (Summer). Overall colonization rates from surface sterilized tissues were 40.3% in roots and 25.83% in (eaves during winter season, 20.15% in roots and 8.66% in Leaves during summer season. Nineteen different fungal taxa, a Streptomyces sp. and bacterial, species were isolated. Streptomyces sp., Chaetomium globosum, Penicillium chrysogenum, Fusarium oxysporum and Cladosporium cladosporioides were dominant endophytes in this study. Frequency of colonization between the sites, seasons and rice varieties were found to differ significantly. Dual culture studies revealed that C. globosum, P chrysogenum and Streptomyces sp. are suitable candidates for extraction of biologically active compounds. Rice harbors many endophytic organisms and some of them have antagonistic properties against fungal pathogens. (C) 2007 Elsevier GmbH. All rights reserved.