Publication Date
1989
Description
In a previous paper, Wolfson and Cresswell (1985) demonstrated that single leaf photosynthetic rates measured on successive leaves near the meristematic tip, in plants treated with different forms and concentrations of nitrogen, decreased reaching very low levels after four month's growth, irrespective of the treatment applied. As the leaves were considered to be young and they were not shaded in any way, it was expected that the photosynthetic rate would remain fairly high throughout the growing period. Therefore it was suggested that the leaves underwent some form of programmed metabolic ageing even though they were still structurally and physiologically young. The purpose of this study was to monitor photosynthesis and the activity of selected enzymes in the second leaves in order to determine whether there was any corresponding reduction in activity which would support the above hypothesis.
Citation
Wolfson, M M. and Cresswell, C F., "Physiological Ageing in Young Leaves of Digitaria eriantha (STEUD)" (2025). IGC Proceedings (1989-2023). 93.
https://uknowledge.uky.edu/igc/1989/session1/93
Included in
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Physiological Ageing in Young Leaves of Digitaria eriantha (STEUD)
In a previous paper, Wolfson and Cresswell (1985) demonstrated that single leaf photosynthetic rates measured on successive leaves near the meristematic tip, in plants treated with different forms and concentrations of nitrogen, decreased reaching very low levels after four month's growth, irrespective of the treatment applied. As the leaves were considered to be young and they were not shaded in any way, it was expected that the photosynthetic rate would remain fairly high throughout the growing period. Therefore it was suggested that the leaves underwent some form of programmed metabolic ageing even though they were still structurally and physiologically young. The purpose of this study was to monitor photosynthesis and the activity of selected enzymes in the second leaves in order to determine whether there was any corresponding reduction in activity which would support the above hypothesis.
