ACTA AGRICULTURAE BOREALI-SINICA ›› 2012, Vol. 27 ›› Issue (6): 107-112. doi: 10.3969/j.issn.1000-7091.2012.06.022

Special Issue: Drought and water saving Cultivation & Physiology

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Effects of Drought Stress and Rehydration on Physiological Characteristics of Medicago ruthenicaSeedling

CAI Li-yan, SUN Qi-zhong, LI Zhi-yong, LI Hong-yan, SHI Wen-gui, LIU Lei   

  1. Grassland Research Institute of Chinese Academy of Agricultural Sciences, Huhhot 010010, China
  • Received:2012-08-04 Published:2012-12-28

Abstract: The drought resistance of 6 germplasm materials of Medicago ruthenicawas identified and evaluated using simulated drought stress and rehydration in a green house. The relative water content of leaves,cell membrane permeability,malondialdehyde content,proline content and soluble protein content were measured at 1,4 ,7 ,1 0 d of drought stress and 2 days after rehydration. The relative water content of Medicago ruthenicaleaves decreased with drought stress enhanced,but rapid recovery after rehydration. Cell membrane permeability,malondialdehyde content and soluble protein content increased with drought stress enhanced,but proline content was first decreased and then increased. Proline content was the most sensitive to drought stress in five physiological indexes. The three drought resistant classes: high drought resistance( MR4 and MR5),medium drought resistance( MR1,MR2and MR3) and weak drought resistance( MR6) were classified using the above 5 physiological indexes by the Euclidean distance clustering method.

Key words: Medicago ruthenica( Linn. ) Trautv. , Drought stress, Rehydration, Physiological characteristics

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Cite this article

CAI Li-yan, SUN Qi-zhong, LI Zhi-yong, LI Hong-yan, SHI Wen-gui, LIU Lei. Effects of Drought Stress and Rehydration on Physiological Characteristics of Medicago ruthenicaSeedling[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2012, 27(6): 107-112. doi: 10.3969/j.issn.1000-7091.2012.06.022.