Non-stomatal inhibition of photosynthesis in arecanut palms affected with yellow leaf disease
Loading...
Date
2007-02
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Gas exchange rates in the apparently healthy and yellow leaf diseased (YLD) arecanut palms were studied. Net photosynthetic rate (A) was significantly reduced in the leaves of diseased palms compared to apparently healthy palms, while internal CO2 concentration (C.) increased. Stomatal conductance (g1) and transpiration rate (E) decreased significantly in the diseased palms. Significant reductions in A/g and A/C ratios were also observed in diseased palms. Similar trend was observed at different times of the day (8.00 to 16.00 h). The results indicate that mesophyll factors were more affected than the stomatal factors in the leaves of diseased palms. Hence, A was reduced more that. E leading to low A/E ratio.
Description
Keywords
Arecanut palms, yellow leaf disease, inhibition, photosynthesis
Citation
Indian Phytopathology 1992 v-45 p-312-315