Thermal Stability Of Nitrate Reductase In Relation To Drought Tolerance In Coconut
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1992
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During tbe development of drought stress in the field, the leaf Relative Water Content (RWC) and Nitrate Reductase (NR) activity of a few coconut genotypes showed considerable reduction. The changes in NR activity were found to be positively correlated with the changes in RWC. However, when the effect due to temperature (Tmax) was eliminated, the correlation between NR activity and RWC low. On the contrary, the maximum temperature (Tmax) was found to have a strongly negative correlation with NR activity. Based on this relationship, the effect of pretreating the leaves at various temperatures on NR activities of several genotypes was studied. The results indicated differences in the thermal stability of NR In vivo, which could be employed as an additional parameter in screening coconut genotypes for drought tolerance.
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In: Abstracts, PLACROSYM IX, CCRI, Chikmagalur, 5- 7 Dec. 1990 65-66 J.Plantn.Crops 1992 suppl. v-20 p-267-273