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The occurrence and distribution of Pythium species on Hainan Island of South China

文献类型： 外文期刊

作者： Ho, Hon-Hing 1 ; Chen, Xiu-Xian 2 ; Zeng, Hui-Cai 2 ; Zheng, Fu-Cong 3 ;

作者机构： 1.SUNY Ner Paltz, Dept Biol, New Paltz, NY 12561 USA

2.Chinese Acad Trop Agr Sci, Haikou Expt Stn, Inst Trop Biol Sci & Biotechnol, Haikou 571101, Peoples R China

3.Hainan Univ, Inst Environm & Plant Protect, Dhanzou 57137, Peoples R China

关键词： Chromista;Ecology;Oomycetes;Pythiaceous Fungi

期刊名称：BOTANICAL STUDIES （ 影响因子：2.787； 五年影响因子：2.871 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： During the period 2003-2009 a comprehensive study of Pythitum species in soil and water samples collected from various habitats on Hainan Island was conducted using conductedusing a combina-tion of baiting and selective agar medium technique. A total of 2348 isolates were identified into 29 species: P. acanthicum, P. acanthophoron, P. aphanidermatum, P. aristosporum, P. arrhenomanes, P. carolinianum, P. catenulatum, P. cucurbitacearum, P. deliense, P. dissotocum, P. graminicola, P. helicoides, P. hydnosporum, P. indigoferae, P. inflatum, P. intermedium, P. irregulare, P. marsipium, P. middletonii, P. monospermum, P. myriotylum, P. oedochilum, P. paroecandrum, P. pulchrum, P. spinosum, P. splendens, P. sylvaticum, P. ulti-mum and P. vexans. Except for P. acanthicum, P. aphanidermatum, P. catenulatum, P. deliense, P. dissotocum, P. indigoferae, P. marsipium, P. myriotylum and P. splendens, the remaining 20 species are new records for Hainan. Pythium cucurbitacearum is the first record in China. Several species of Pythium which are either ter-restrial or occasionally found in fresh water were isolated for the first time from fallen leaves submerged in sea water in or near mangrove habitats: P. vexans, P. aphanidermatum, P. cucurbitacearum, P. helicoides and P. middletonii. It remains to be determined whether they should be treated as halotolerant strains or marine spe-cies of Pythium but their repeated isolation pointed out their significance in litter decomposition in the marine habitat. By far, P. vexans is the most widespread and abundant species followed by P. deliense, P. acanthicum, P. aphanidermatum, P. helicoides and P. splendens. Of the 23 sampling sites, the greatest diversity of Pythium species was found in the cities of Wenchang, Haikao, Wuzhishan, Ledong and their vicinity.

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