Photosensitivity of urediniospore germination in Puccinia arachidis

  • Subrahmanyam, P
  • Reddy, P M
  • McDonald, D
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Publication date
January 1988
Publisher
Department of Zoology, University of Cambridge

Abstract

Light inhibited germination of P. arachidis (cause of groundnut rust) urediospores. The threshold value for complete inhibition of urediospore germination was 5000 W/m². Wavelengths of 430, 510 and 620 nm inhibited germination but had no adverse effect on germ-tube elongation of pregerminated urediospores. Hydrated urediospores were more sensitive to light than non-hydrated urediospores. Inhibition was not permanent, and spores germinated when returned to the dar

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