TOXICITY OF OAT ROOTS, OAT ROOT EXTRACTS, AND SAPONINS TO ZOOSPORES OF PYTHIUM SPP AND OTHER FUNGI
TOXICITY OF OAT ROOTS, OAT ROOT EXTRACTS, AND SAPONINS TO ZOOSPORES OF PYTHIUM SPP AND OTHER FUNGI
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DOI：
10.1016/s0007-1536(85)80010-3
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发表时间：
1985-01-01
期刊：
影响因子：
--
通讯作者：
MITCHELL, RT
中科院分区：
文献类型：
--
作者：
DEACON, JW;MITCHELL, RT
在实验室实验中，燕麦（Avena sativa）的根和草Arrhytherum elatius引起Allomyces arbuscula，Aphanomyces sp.，Phytophthora cinnamomi、Pythium aphanidermatum、P. tagomanes、P. graminicola、P. intermedium、P. ultimum var. sporangiferum和Saprolegnia litoralis。这种溶解化合物被认为是皂苷燕麦素，与明显未受损的燕麦根有关。它能阻止游动孢子形成孢囊壁，但对腐霉的成囊前游动孢子和营养菌丝只有微弱的活性或无活性。其对游动孢子的作用与皂苷β-七叶皂苷。在初步试验中，这些化合物在通过土壤或在土壤中孵育后仍保持活性。
In laboratory experiments, roots of oats (Avena sativa) and the grass Arrhenatherum elatius caused attraction and subsequent lysis of zoospores of Allomyces arbuscula, Aphanomyces sp., Phytophthora cinnamomi, Pythium aphanidermatum, P. arrhenomanes, P. graminicola, P. intermedium, P. ultimum var. sporangiferum and Saprolegnia litoralis. The lytic compound, thought to be the saponin avenacin, was related from apparently undamaged oat roots. It prevented cysts wall formation by zoospores, but it was only weakly active or inactive against pre-encysted zoospores and vegetative mycelia of Pythium spp. Its effects on zoospores were paralleld by the saponin .beta.-aescin. In preliminary tests, these compounds retained activity after passage through, or incubation in, soil.