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Ethylene Production and Mycelium Growth of the Tulip Strain of Fusarium oxysporum as Influenced by Shaking of and Oxygen Supply to the Culture Medium
Author(s) -
SWART ANNIE,
KAMERBEEK G. A.
Publication year - 1977
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1977.tb09282.x
Subject(s) - mycelium , fusarium oxysporum , oxygen , fungus , substrate (aquarium) , liquid culture , ethylene , liquid medium , biology , strain (injury) , fusarium , horticulture , botany , food science , chemistry , biochemistry , chromatography , ecology , anatomy , organic chemistry , catalysis
The fungus Fusarium oxysporum Schlecht f. sp. tulipae Apt. can produce ethylene abundantly in vitro when grown in Pratt's liquid medium with glucose as the only organic substrate. This production starts after a lag phase of about 4 days, and peak production occurs when mycelium weight has reached its maximum value. For several days the rate of production is more or less linearly dependent on pO 2 . The total production is also dependent on the oxygen concentration, but pure oxygen inhibits the total production by about 50% as compared with 21% oxygen. The high production in shake cultures, as compared with the low production in stagnant cultures, is probably the result of a better oxygen supply in the culture medium. The mycelium weight proved not to be a valid referential basis for the production of ethylene.