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Protection of Wheat Seedlings from Helminthosporium Infection by Seed Treatment with Chemicals
Author(s) -
Hait G. N.,
Sinha A. K.
Publication year - 1986
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1986.tb00865.x
Subject(s) - biology , phytoalexin , inoculation , sativum , lesion , horticulture , seed treatment , botany , agronomy , surgery , medicine , germination , biochemistry , resveratrol
Twenty of twenty‐four chemicals known to induce phytoalexin production in other plants, when used to soak seed, provided effective protection to 3‐week‐old susceptible wheat seedlings against inoculation with Helminthosporium sativum. The number of lesions was very significantly reduced in most of these treatments and there was evidence for inhibition of lesion expansion in a few. Studies with twelve of the more effective chemicals showed that the protective effect persisted at significant levels even in 5‐week‐old plants and that at this stage the inhibitory effect on lesion expansion was more pronounced in most of the treatments. Different treatments led to the development of a moderate to high level of fungitoxicity in young wheat seedlings which gradually declined with age of the plant and disappeared in 5‐week‐old plants. When inoculated at the age of 3 or 5 weeks, plants receiving most of the treatments developed appreciably higher fungitoxicity than the untreated plants.