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    Abstract
2012 (Vol. 4, Issue: 6)
Article Information:

Physiological Responses Differences of Different Genotype Sesames to Flooding Stress

Feng-ying Xu, Xiao-ling Wang, Qi-xia Wu, Xiu-rong Zhang and Lin-hai Wang
Corresponding Author:  Xiao-ling Wang 

Key words:  Antioxidant enzymes, flooding stress, net photosynthetic rate, physiological parameters, sesame, ,
Vol. 4 , (6): 352-356
Submitted Accepted Published
August 31, 2012 October 03, 2012 December 20, 2012
Abstract:

The objective of this study was to elucidate the physiological reaction variation of different genotype sesames to flooding stress. Different sesame genotypes, including two Water logging Tolerant Genotypes (WTGs), WTG-2541 and WTG-2413 and one water logging sensitive genotype, WSG-EZhi2, were used as tested materials. Flooding was applied for 48 h when plants were at the three-leaf stage before a number of parameters were assessed. Characteristics that were detected included photosynthetic characteristics of seedlings, contents of proline and Malondialdehyde (MDA), activities of Peroxidase (POD), Catalase (CAT) and Superoxide Dismutase (SOD). Results showed the net photosynthetic rate (Pn) of the three tested sesame seedlings all decreased. After a 15 days restore growth under normal field conditions, the P n of WTGs was lower than control with no significant difference. In contrast, the Pn of WSG was lower than control significantly. In flooding, both the WTGs and WSG showed the higher proline contents than that of control, however, a significant lower MDA contents were observed in seedlings flooding treated than that of control. The POD activities of the WTGs increased rapidly while of the WSG decreased with flooding stress. The opposite reaction was observed in activities of CAT, of which the WTGs showed a less percentage decreasing than that of the WSG. The SOD activities of three tested materials increased in flooding, with the WTGs increasing more than of the WSG. In general, the WTGs of sesames showed a substantial tolerance to flooding stress by increasing organic osmoregulation content and activities of active oxygen scavenger enzymes.
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  Cite this Reference:
Feng-ying Xu, Xiao-ling Wang, Qi-xia Wu, Xiu-rong Zhang and Lin-hai Wang, 2012. Physiological Responses Differences of Different Genotype Sesames to Flooding Stress.  Advance Journal of Food Science and Technology, 4(6): 352-356.
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ISSN (Online):  2042-4876
ISSN (Print):   2042-4868
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