Research Report

Comprehensive Evaluation on Cold Resistance of Two Wild Clover in Tibet  

xiang jia , Xiangtao Wang , Henna Baosai , Mingtao Wang , Yanjun Miao
Tibet Agriculture and Animal Husbandry College,Tibet Nyingchi, 860000
Author    Correspondence author
Legume Genomics and Genetics, 2020, Vol. 11, No. 1   
Received: 07 Sep., 2020    Accepted: 09 Sep., 2020    Published: 25 Sep., 2020
© 2020 BioPublisher Publishing Platform
This article was first published in Molecular Plant Breeding in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
In order to explore the adaptability of Melilotus Mill to low temperature environment, the wild M.albus and M. officinalis ollected from Dazi, Tibet were used as experimental materials to explore the seed germination characteristics of their seeds under -4 ℃ low temperature stress , Measured the malondialdehyde (MDA) content, soluble sugar (SS) content, free proline (Pro) content, superoxide dismutase activity and peroxidase of seedlings under -10 ℃ ~ 5 ℃ low temperature stress (POD) Changes in activity, and a comprehensive evaluation of cold resistance using the membership function method. The results show that: -4 ℃ low temperature stress has a significant inhibitory effect on the seed germination of the two materials; as the temperature decreases, the MDA content in the leaves of the two materials continues to increase, and other physiological indicators show a trend of first increasing and then decreasing, both The peak value is reached at -5 ℃; the comprehensive evaluation results of the membership function method show that the cold resistance of M.albus is higher than that of M.officinalis. This study will have important reference significance for revealing the adaptation mechanism of wild Melilotus Mill in Tibet to low temperature environment and the development and utilization of local Melilotus Mill germplasm resources
Keywords
Melilotus Mill; Low temperature stress; Physiology and biochemistry; Cold resistance evaluation
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. xiang jia
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