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Abstract
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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
Submitted: August 31, 2012
Accepted: October 03, 2012
Published: December 20, 2012 |
Abstract:
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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.
Key words: Antioxidant enzymes, flooding stress, net photosynthetic rate, physiological parameters, sesame, ,
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Cite this Reference:
Feng-ying Xu, Xiao-ling Wang, Qi-xia Wu, Xiu-rong Zhang and Lin-hai Wang, . Physiological Responses Differences of Different Genotype Sesames to Flooding Stress. Advance Journal of Food Science and Technology, (6): 352-356.
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ISSN (Online): 2042-4876
ISSN (Print): 2042-4868 |
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