, Research Papers

Leaf water potential, stomatal resistance and activities of enzymes during the development of moisture stress in the coconut palm

Research Papers
S. Shivashankar
Central Plantation Crops Research Institute, Kasaragod 671 124, Kerala, India
K.V. Kasturi Bai
Central Plantation Crops Research Institute, Kasaragod 671 124, Kerala, India
V. Rajagopal
Central Plantation Crops Research Institute, Kasaragod 671 124, Kerala, India
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Keywords

Leaf water potential
Enzyme activity
Coconut palm
Moisture stress
Soil and atmospheric drought

How to Cite

Leaf water potential, stomatal resistance and activities of enzymes during the development of moisture stress in the coconut palm. (1991). Tropical Agriculture, 68(2). https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1671
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Abstract

Response of coconut palms (Cocos nucifera L.) to available soil moisture was studied by determination of leaf water potential, ?, stomatal resistance and activities of three enzymes, acid phosphatase (orthophosphoryl monoester phosphohydrolase, (E.C. 3.1.3.2), L-aspartate: 2-oxoglutarate aminotransferase (E.C. 2.6.1.1) and malate dehydrogenase (E.C. 1.1.1.39). Comparison between the irrigated and rainfed palms was made during the course of a six-month period (December 1985 - May 1986) representing increasing drought conditions. A combined effect of soil and atmospheric droughts on the development of stress in terms of high stomatal resistance and low ? was discernible in coconut. Stress-induced changes in enzyme activities was noticed. The threshold ? for the activities of acid phosphatase and L-aspartate: 2-oxoglutarate aminotransferase was determined.
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