Changes in Proline and Polyphenol oxidase enzyme activity in some Banana Cultivars and Hybrids under water stress  

K. Krishna Surendar1 , D. Durga Devi2 , P. Jeyakumar3 , K. Velayudham4 , I. Ravi5
1. Assistant Professor, Crop Physiology, Regional Research Station, TNAU, Paiyur
2. Professor, Department of Crop Physiology, TNAU, Coimbatore. Tamil Nadu, INDIA
3. Professor & Head, Department of Crop Physiology, TNAU, Coimbatore. Tamil Nadu, INDIA
4. Dean, Agriculture College & Research Institute, TNAU, Madurai. Tamil Nadu, INDIA
5. Principal Scientist, National Research Centre for Banana (ICAR), Thiruchirapalli
Author    Correspondence author
Genomics and Applied Biology, 2015, Vol. 6, No. 4   doi: 10.5376/gab.2015.06.0004
Received: 10 Feb., 2015    Accepted: 22 Mar., 2015    Published: 09 Apr., 2015
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This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Surendar et al., 2015, Changes in Proline and Polyphenol oxidase enzyme activity in some Banana Cultivars and Hybrids under water stress, Genomics and Applied Biology, Vol.6, No.4, 1-6 (doi: 10.5376/gab.2015.06.0004)

Abstract

Plant growth and productivity is adversely affected by abiotic stresses induced changes in proline content and polyphenol oxidase enzyme activity. Field experiments were conducted at the National Research Centre for banana, Thiruchirapalli, during the growing season of 2011-2013 to compare the changes in proline content and PPO enzyme activity in twelve main crop and ratoon crop ofbanana cultivars and hybrids in 5th and 7th MAP (Month after Planting) under two levels of irrigation. The lowest reduction in the bunch yield of tolerant banana cultivars and hybrids viz., Karpuravalli, Karpuravalli x PisangJajee, Saba, and Sannachenkathali with the highest increase in proline and PPO enzyme activity was observed in 5th and 7th MAP stage due to 50 per cent depletion in available soil moisture (ASM) of the stress.

Keywords
Water deficit; Proline; Polyphenol oxidase; Yield; Banana
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