Abstract
Inoculation of cotyledons with Alternaria macrospora or application of 2,6-dichloroisonicotinic acid to cotyledons caused the next emerging leaves to become less susceptible to infection by A. macrospora than those on control plants. This effect was demonstrated in cotton cultivars Siokra and Deltapine using young plants raised and tested under glasshouse conditions. The treatments applied to the cotyledons had no visible effect on the development of the plants and 2,6-dichloroisonicotinic acid had no direct effect on the fungus in vitro, suggesting that resistance was induced systemically in cotton plants.
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Brock, P.M., Inwood, J.R.B. & Deverall, B.J. Systemic induced resistance to Alternia macrospora in cotton (Gossypium hirsutum). Australasian Plant Pathology 23, 81–85 (1994). https://doi.org/10.1071/APP9940081
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DOI: https://doi.org/10.1071/APP9940081