Abstract
Water stress is one of the main environmental stresses that affect plant growth and development. Salicylic acid (SA) induces water stress tolerance in plants. In this study, the effect of exogenous SA on physiological and biochemical process in Red bayberry (Myric rubra) seedlings, of three different genotypes, that were grown under water stress (soil ranging from 20 to 50 % of field capacity) was evaluated. Results showed that water stress severely affected the relative water content (RWC), photosynthesis, stomatal conductance and enzymes activities. Genotypes differed in RWC, Chlorophyll content, gas exchange parameter, antioxidant enzymes activities and proline, and the genotype Biqi had the RWC, photosynthesis, stomatal conductance and enzymes activities greater than the other two genotypes Wangdao and Shenhong. SA treated plants showed, in general, a higher RWC, chlorophyll content, photosynthetic rate, stomatal conductance, superoxide dismutase activity and proline content, and a lower relative electrolyte conductivity, methane dicarboxylic aldehyde content and catalase activity compared to those of untreated seedlings. These results signified the role of SA in diminishing the negative effects of drought on Red bayberry plants and suggest that SA could be used as a potential growth regulator, for improving plant growth under water stress.
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Abbreviations
- REC:
-
Relative electrolyte conductivity
- MDA:
-
Malondialdehyde
- CAT:
-
Catalase
- ROS:
-
Reactive oxygen species
- RWC:
-
Relative water content
- SA:
-
Salicylic acid
- SOD:
-
Superoxide dismutase
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Acknowledgments
This work was funded by the National Natural Science Foundation of China (31070604 and 31270716); the Scientific Research Foundation for the Returned Overseas Chinese Scholars; State Education Ministry, the key projects of the State Education Ministry; the initial project of the National Basic Research Program of China (2011CB111510); the Zhejiang Provincial Natural Science Foundation of China (Y305314, R13C160002 and LZ12C16001); the Fruit Innovation Team Project of Zhejiang Province (2009R50033) and the Innovation Team Project of Zhejiang A & F University (Class B) (2007).
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Yeqing Ying and Yongli Yue contributed equally to this work.
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Ying, Y., Yue, Y., Huang, X. et al. Salicylic acid induces physiological and biochemical changes in three Red bayberry (Myric rubra) genotypes under water stress. Plant Growth Regul 71, 181–189 (2013). https://doi.org/10.1007/s10725-013-9818-3
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DOI: https://doi.org/10.1007/s10725-013-9818-3