INDUCTION OF SUPPRESSIVENESS TO RHIZOCTONIA-SOLANI IN SOIL
INDUCTION OF SUPPRESSIVENESS TO RHIZOCTONIA-SOLANI IN SOIL
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DOI：
10.1094/phyto-70-994
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发表时间：
1980-01-01
期刊：
影响因子：
3.2
通讯作者：
BAKER, R
中科院分区：
文献类型：
--
作者：
CHET, I;BAKER, R
当土壤被大（> 589 μ m）的R. solani，土壤对R.茄病菌只产生于酸化或自然酸性土壤中，每隔一周重新种植萝卜、苜蓿或甜菜。随着抑制力的增加，哈茨木霉的繁殖体密度也随之增加。酸性pH水平促进T. harzianum比R. solani，并促进分生孢子梗的形成和孢子萌发。拮抗作用的机制是寄生，随后是裂解，而不是寄生;真菌释放活性β-内酰胺酶。(1-3)葡聚糖酶和几丁质酶的活性。solani细胞壁并裂解真菌活菌丝体和细胞壁。在生土中，T.哈茨也能控制萝卜立枯病。
When soil was infested with large (> 589 .mu.m) propagules of R. solani, soil suppressiveness to R. solani was generated only in acidified or naturally acidic soils after replanting radish [Raphanus sativus], alfalfa [Medicago sativa] or sugar beet [Beta vulgaris] at weekly intervals. As suppressiveness increased, the propagule density of Trichoderma harzianum also increased. Acidic pH levels enhanced in vitro growth of T. harzianum more than that of R. solani and stimulated its conidiophore formation and spore germination. The mechanism of antagonism was parasitism followed by lysis rather than antibiosis; the fungus released active .beta.-(1-3) glucanase and chitinase when grown on R. solani cell walls and lysed both living mycelium and cell walls of that fungus. In raw soil, T. harzianum also controlled damping-off of radish.