Exogenous Melatonin Affects the Germination and Resistance Ability of Common Bean Seeds Under Chilling Stress

doi:10.11924/j.issn.1000-6850.casb2021-1218

Abstract

Abstract:

In order to explore the effect of melatonin (Mt) on common bean seeds under chilling stress, the seeds of common bean were treated with chilling stress (LT) and chilling stress with melatonin (LT+Mt), and the normal temperature treatment was set as the control (CK). The physiological indexes of seeds of the same period were measured. The results showed that Mt could improve the germination rate of seeds under chilling stress, but the germination rate was lower than that of CK. The content of osmoregulatory substances, O₂^- and MDA and the activities of antioxidant enzymes were measured. It was found that the content of osmoregulatory substances increased under chilling stress, and the content further increased when Mt was added. The content of O₂^- and MDA increased after chilling stress, while the content of MDA decreased significantly after Mt addition, but was higher than that of CK. The activities of antioxidant enzymes after low temperature treatment were slightly lower than those of CK, and the content of antioxidant enzymes was significantly increased when Mt was added. To sum up, exogenous Mt could effectively reduce the damage of chilling stress on seed germination, thus promoting the ability of seeds to resist chilling stress during germination.

Key words: common bean, melatonin, seed, chilling stress

CLC Number:

S643.1

YANG Xiaoxu, LI Mengdi, LIU Dajun, FENG Guojun, LIU Chang. Exogenous Melatonin Affects the Germination and Resistance Ability of Common Bean Seeds Under Chilling Stress[J]. Chinese Agricultural Science Bulletin, 2022, 38(33): 34-38.

Figures/Tables 4

References 27

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