NaCl 胁迫对小黄花菜生长及相关生理指标的影响

Subjects: Biology >> Botany >> Applied botany submitted time 2021-07-20 Cooperative journals: 《广西植物》

耿晓东 周英 于明华 汪成忠 钱剑林

Abstract： To study the salt tolerance mechanism of Hemerocallis minor and select excellent salt-tolerant plants, sand culture in different concentrations of NaCl (50, 100, 150, 200, 250 mmol·L-1) to explore the growth characteristics and related physiological indicators. The results were as follows: (1) 100-150 mmol·L-1 NaCl stress caused initial damage. Growth was significantly inhibited in a salty environment above 200 mmol·L-1. (2) NaCl stress above 200 mmol·L-1 caused the cell membrane permeability and MDA content increased greatly. (3) The content of proline in the leaves increased significantly with the NaCl concentration increase; Under 50-100 mmol·L-1 stress, the soluble sugar content increased at the initial stage then became decreased. The maximum appeared at 15th day; The slow change of soluble protein content in the leaves suggested it was not the main adjustment substance. H. minor could alleviate the salinity damage by improving cell membrane permeability and promoting the organic osmotic adjustment substances’ synthesis. For these reasons, H. minor could grow normally in saline-alkali soil below 50-150 mmol·L-1.

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