The fitness cost of benzothiadiazole (BTH)-induced resistance in bean has been investigated both in terms of seed quality and production, and by examining some physiological parameters, such as photosynthesis and ethylene induction and emission. Although BTH treatment induced 1-aminocyclopropane-1- carboxylate (ACC) oxidase gene transcription, no ethylene emission was detected, unless leaves were detached, thus stimulating senescence. Efficiency of photosystem II was not affected by BTH treatment, nor was seed quality, the electrophoretic patterns of seed proteins extracted from BTH-treated and untreated plant being very similar. Only seed production was slightly lower in BTH-treated plants, due to the lower number of pods per plant; however this difference was not significant. All these data, taken together, indicate that BTH-induced resistance in bean does not incur appreciable fitness costs. Moreover, ACC oxidase gene expression, without ethylene emission, suggests a sort of "ethylene priming" induced by BTH. Thus, BTH and ethylene signalling pathways seem to act synergistically in the establishment of systemic acquired resistance.
Does benzothiadiazole-induced resistance increase fitness cost in bean? / M. Iriti, F. Faoro. - In: JOURNAL OF PLANT PATHOLOGY. - ISSN 1125-4653. - 85:4(2003), pp. 265-270.
Does benzothiadiazole-induced resistance increase fitness cost in bean?
M. IritiPrimo
;F. FaoroUltimo
2003
Abstract
The fitness cost of benzothiadiazole (BTH)-induced resistance in bean has been investigated both in terms of seed quality and production, and by examining some physiological parameters, such as photosynthesis and ethylene induction and emission. Although BTH treatment induced 1-aminocyclopropane-1- carboxylate (ACC) oxidase gene transcription, no ethylene emission was detected, unless leaves were detached, thus stimulating senescence. Efficiency of photosystem II was not affected by BTH treatment, nor was seed quality, the electrophoretic patterns of seed proteins extracted from BTH-treated and untreated plant being very similar. Only seed production was slightly lower in BTH-treated plants, due to the lower number of pods per plant; however this difference was not significant. All these data, taken together, indicate that BTH-induced resistance in bean does not incur appreciable fitness costs. Moreover, ACC oxidase gene expression, without ethylene emission, suggests a sort of "ethylene priming" induced by BTH. Thus, BTH and ethylene signalling pathways seem to act synergistically in the establishment of systemic acquired resistance.Pubblicazioni consigliate
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