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Effects of melatonin on germination and amino acid content in different wheat varieties seeds under polyethylene glycol stress

Dongxiao Li, Di Zhang, Hongguang Wang, Haoran Li, Shijia Song, Hongye Li, Ruiqi Li
doi: https://doi.org/10.1101/710954
Dongxiao Li
1College of Agronomy, Agricultural University of Hebei, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei Province, China
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Di Zhang
1College of Agronomy, Agricultural University of Hebei, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei Province, China
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Hongguang Wang
1College of Agronomy, Agricultural University of Hebei, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei Province, China
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Haoran Li
1College of Agronomy, Agricultural University of Hebei, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei Province, China
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Shijia Song
2Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, 050000, China
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Hongye Li
1College of Agronomy, Agricultural University of Hebei, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei Province, China
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Ruiqi Li
1College of Agronomy, Agricultural University of Hebei, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei Province, China
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  • For correspondence: wheatlrq@163.com
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Abstract

In this research, the effects of melatonin on germination and amino acid content in wheat (Triticum aestivum L.) seeds under polyethylene glycol (PEG-6000) stress were investigated. The results revealed that 10 μM melatonin could aggravate the adverse effects of drought stress on germination percentage, germination index, and germination potential of two wheat varieties (JM22 and HG35). However, 300 μM melatonin could obviously alleviate the negative effect of water stress on germination and increase radicle length, radicle number and plumule length of germinated seeds. Principal component analysis showed that amino acid content apparently changed in germination and the variation amplitude was different due to melatonin concentrations and wheat varieties. Lys content in wheat seed under 300 μM melatonin plus PEG treatment increased compared with that under PEG. Meanwhile, Lys content was significantly and positively correlated with germination percentage, germination index, germination potential, radicle length, and plumule length, respectively. Our results suggested Lys play an important role in the regulation of melatonin on drought resistance of wheat seed during germination. This may be of value for saving water resources in North China Plain.

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Posted July 22, 2019.
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Effects of melatonin on germination and amino acid content in different wheat varieties seeds under polyethylene glycol stress
Dongxiao Li, Di Zhang, Hongguang Wang, Haoran Li, Shijia Song, Hongye Li, Ruiqi Li
bioRxiv 710954; doi: https://doi.org/10.1101/710954
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Effects of melatonin on germination and amino acid content in different wheat varieties seeds under polyethylene glycol stress
Dongxiao Li, Di Zhang, Hongguang Wang, Haoran Li, Shijia Song, Hongye Li, Ruiqi Li
bioRxiv 710954; doi: https://doi.org/10.1101/710954

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