Accumulation of pathogenesis-related proteins in barley leaf intercellular spaces during leaf senescence
1998
Tamas, L. | Ciamporova, M. | Luxova, M. (Slovenska Akademia Vied, Bratislava (Slovak Republic). Botanicky Ustav)
Accumulation of the pathogenesis-related (PR) proteins localised in intercellular spaces of barley primary leaves, chlorophyll content, structure of chloroplasts, and photosynthesis were examined during natural and in vitro induced leaf senescence. Some of PR proteins accumulated during natural senescence, but their accumulation pattern was different from those of pathogen-induced as well as during in vitroinduced senescence, which indicate different molecular bases of these processes. The chloroplasts contained more grana under in vitro induced senescence and they had reduced length in the dark. Correspondingly, accumulation of PR proteins was detectable on about the 15th day but the content of some PR proteins increased in later stages of senescence.
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