干旱和盐胁迫对 种子萌发和幼苗生长的影响。

Effects of drought and salt stress on seed germination and seedling growth of .

机构信息

Tibet Agricultural and Animal Husbandry University, Tibet, China.

出版信息

PeerJ. 2023 Aug 24;11:e15968. doi: 10.7717/peerj.15968. eCollection 2023.

Abstract

Drought and soil salinization are global environmental issues, and play an important role in vegetation restoration in arid and saline environments due to their excellent stress resistance. In the process of vegetation restoration, the stage from germination to seedling growth of forage is crucial. This experiment studied the effects of PEG-6000 simulated drought stress and NaCl simulated salinization stress on the germination of seeds, and explored the growth of forage seedlings from sowing to 28 days under drought and salinization stress conditions. The results showed that under the same environmental water potential, there were significant differences in responses of seed germination, seedling growth, organic carbon, total nitrogen and total phosphorus of above-ground and underground parts of to drought stress and salinization stress. Using the membership function method to comprehensively evaluate the seed germination and seedling indicators of , it was found that under the same environmental water potential, was more severely affected by drought stress during both the seed germination and seedling growth stages. showed better salt tolerance than drought resistance.

摘要

干旱和土壤盐渍化是全球性的环境问题,由于其具有出色的抗逆性,在干旱和盐渍环境中的植被恢复中起着重要作用。在植被恢复过程中,从种子发芽到幼苗生长的阶段至关重要。本实验研究了 PEG-6000 模拟干旱胁迫和 NaCl 模拟盐胁迫对 种子发芽的影响,并探讨了在干旱和盐胁迫条件下从播种到 28 天期间饲料幼苗的生长情况。结果表明,在相同的环境水势下, 对干旱胁迫和盐胁迫的种子发芽、幼苗生长、地上和地下部分的有机碳、总氮和总磷的响应存在显著差异。利用隶属函数法综合评价 种子发芽和幼苗指标,发现相同环境水势下,种子发芽和幼苗生长阶段干旱胁迫对 的影响更为严重。 表现出比耐旱性更好的耐盐性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e56a/10460566/bcaecbcc42a9/peerj-11-15968-g001.jpg

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