5种薄荷对PEG模拟干旱胁迫的生理响应与耐旱性评价

doi:10.19640/j.cnki.jtau.2022.01.001

Journal of Tianjin Agricultural University ›› 2022, Vol. 29 ›› Issue (1): 1-7.doi: 10.19640/j.cnki.jtau.2022.01.001

• Researches and Scientific Notes • Next Articles

Physiological response and drought tolerance evaluation of five mints to PEG-simulated drought stress

Zhang Yuanyi, Li Ai^{Corresponding Author}, Yan Zhuoli, Zhang Yongjie, Yang Lixiong

College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 300392, China

Received:2021-04-14 Online:2022-03-31 Published:2022-04-14

Abstract

Abstract: For screening of mint plant drought-resistant germplasm resources, the effect of drought stress simulated by different concentrations of PEG - 6000 on seed germination and seedling physiological and biochemical characteristics of 5 kinds of mint and the drought tolerance of the five mints was evaluated by subordinate function method. The results showed that drought stress could significantly restrain the germination of 5 kinds of mint seeds, and the inhibition effect was increased with the increase of PEG-6000 concentration. With the increase of stress degree, the relative water content of the five kinds of mint seedlings decreased continuously. SOD activity and photosynthetic pigment content increased first and then decreased. The contents of proline, soluble protein, soluble sugar and MDA all increased gradually. Under severe stress, the proline content of Mentha pulegium was 5.21 times that of CK, the soluble protein content of Monarda didyma was 5.19 times that of CK, and the MDA content of Mentha piperita was 3.36 times that of CK. According to the membership function analysis, the order of drought resistance was : Monarda didyma>Mentha puleqium L.>Mentha spicata L.>Mentha citrata>Mentha piperita.

Key words: mint, PEG-6000, drought stress, subordinate function

CLC Number:

S682.1

Zhang Yuanyi, Li Ai, Yan Zhuoli, Zhang Yongjie, Yang Lixiong. Physiological response and drought tolerance evaluation of five mints to PEG-simulated drought stress[J]. Journal of Tianjin Agricultural University, 2022, 29(1): 1-7.

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Physiological response and drought tolerance evaluation of five mints to PEG-simulated drought stress

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