Effects of Light on Reproduction of Gibberella zeae and Overwintering of Soil-Borne Conidia

밀붉은곰팡이병균의 분생포자 및 자낭각 형성에 미치는 광선의 영향 및 토양에서의 분생포자월동

  • Kim Hee Kyu (Dept. of Agricultural Biology, College of Agriculture, Seoul National University) ;
  • Chung Hoo Sup (Dept. of Agricultural Biology, College of Agriculture, Seoul National University)
  • 김희규 (서울대학교 농과대학 농생물학과) ;
  • 정후섭 (서울대학교 농과대학 농생물학과)
  • Published : 1972.05.01

Abstract

1. Continuous light induced more conidia than alternating light and darkness treatment in isolate Chinju 1. Isolate Suwon 3 produced much more conidia on synthetic medium than Chinju 1 in light. Conidial formation in Suwon 3 increased remarkably with alternate light and darkness in 8 days incubation. 2. Light was essential for perithecial formation in Chinju 1. No matured perithecia were observed in Suwon 3 with any treatment. Abundant perithecia were produced in Chinju 1 but only perithecial initiation occurred in Suwon 3. Suwon 3 produced significantly more conidia than Chinju 1, while perithecial formation was reversed. 3. Conidial numbers in soil decreased significantly through the winter at 10, 30 and 50 per cent soil moisture, with the most striking decrease at 10 per cent levels, but the number recovered again beginning in March, regardless of the soil moisture. The above results provide us a useful clue to support the possbility the conidia may serve as a primary inoculum.

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