CALCIUM-DEPENDENT, GENUS-SPECIFIC, AUTOAGGREGATION OF ZOOSPORES OF PHYTOPATHOGENIC FUNGI
CALCIUM-DEPENDENT, GENUS-SPECIFIC, AUTOAGGREGATION OF ZOOSPORES OF PHYTOPATHOGENIC FUNGI
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DOI：
10.1006/emyc.1995.1025
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发表时间：
1995-09-01
期刊：
影响因子：
--
通讯作者：
GOW, NAR
中科院分区：
文献类型：
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作者：
REID, B;MORRIS, BM;GOW, NAR
棕榈疫霉，Pythium catenulatum，和Pythium dissotocum的游动孢子的密集种群形成多细胞转储，或自聚集体。自动聚集的结果是积极的的士，并被证明是密度依赖性，钙的需求，并受pH值的影响。此外，自动聚集似乎是种特异性的，因为聚集的Ph. palmivora不吸引游动孢子的三个腐霉物种和聚合物的Py。catenulatum不吸引Ph.palmivora游动孢子。聚集中心产生的钙离子梯度和诱导趋化性生长的芽管出现游动孢子囊。自动聚集还起到增强游动孢子在植物战利品表面的积累的作用，从而增加接种物的感染潜力。在没有根的情况下，自聚集可以提高游动孢子群体的存活率。(C)出版社：Academic Press
Dense populations of zoospores of Phytophthora palmivora, Pythium catenulatum, and Pythium dissotocum formed multicell dumps, or autoaggregates. Autoaggregation was the result of active taxis and was shown to be density-dependent, calcium-requiring, and influenced by pH. In addition, autoaggregation appeared to be species-specific, since aggregates of Ph. palmivora did not attract zoospores of three Pythium species and aggregates of Py. catenulatum did not attract Ph. palmivora zoospores. Aggregation centers generated a calcium ion gradient and induced chemotropic growth of germ tubes emerging from zoospore cysts. Autoaggregation also functions to enhance zoospore accumulation at plant loot surfaces, thereby increasing inoculum potential for infection. In the absence of roots, autoaggregation may enhance zoospore population survival. (C) 1995 Academic Press, Inc.