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Saprophytic Behaviour of Some Cereal Root‐Rot Fungi
Author(s) -
BUTLER F. C.
Publication year - 1953
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1953.tb01084.x
Subject(s) - biology , sativum , allium sativum , fungus , ammonium , nitrogen , straw , nitrate , botany , agronomy , horticulture , ecology , chemistry , organic chemistry , physics , quantum mechanics
Records are given of the survival of Helminthosporium sativum, Curvularia ramosa and Ophiobolus graminis as saprophytes in infected wheat straw buried in un‐sterilized soil of different nitrate nitrogen content. Ample nitrogen supply prolonged the survival of O. graminis and C. ramosa but shortened that of H. sativum. Both the Australian isolate of H. sativum used for the survival experiment and a Canadian isolate of the fungus were able to utilize nitrate, as well as ammonium and peptone nitrogen; neither isolate required either thiamin or biotin for growth in pure culture. The depressing effect of nitrate nitrogen upon survival of H. sativum is ascribed to its encouragement of competing micro‐organisms also present in the infected straws.