Non-stomatal inhibition of photosynthesis in are canut palms affected with yellow leaf disease
135
Authors
-
P. CHOWDAPPA and D. BALASIMHA
Central Plantation Crops Research Institute, Regional Station, Vittal 574 243
Keywords:
Arecanut palms, yellow leaf disease, inhibition, photosynthesisAbstract
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) incre sed. Stomatal conductance (g,) and transpiration rate (E) decreased significantly in. the diseased palms. Significant reductions in Alg, 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 thar, E !e ding to low AlE ratio.
Issue
Section
License
For Authors
As soon as an article is accepted for publication, authors are requested to assign copyright of the article (or to grant exclusive publication and dissemination rights) to the publisher (Indian Phytopathlogical Society). This will ensure the widest possible protection and dissemination of information.
For Readers
While the advice and information in this journal is believed to be true and accurate at the date of its publication, the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may have been made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
All articles published in this journal are protected by copyright, which covers the exclusive rights to reproduce and distribute the article (e.g., as offprints), as well as all translation rights. No material published in this journal may be reproduced photographically or stored on microfilm, in electronic data bases, on video disks, etc., without first obtaining written permission from the publisher. The use of general descriptive names, trade names, trademarks, etc. in this publication, even if not specifically identified, implies that these names are protected by the relevant laws and regulations.