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外源生长物质对干旱胁迫条件下甜高粱种子萌发的影响
引用本文:梁佳,马依努·吾斯曼,方志刚. 外源生长物质对干旱胁迫条件下甜高粱种子萌发的影响[J]. 草地学报, 2021, 29(3): 610-617. DOI: 10.11733/j.issn.1007-0435.2021.03.023
作者姓名:梁佳  马依努·吾斯曼  方志刚
作者单位:1. 喀什大学生命与地理科学学院, 新疆 喀什 844000;2. 新疆帕米尔高原生物资源与生态重点实验室, 新疆 喀什 844000
基金项目:新疆维吾尔自治区高校科研计划自然科学项目
摘    要:为筛选促进甜高粱种子萌发的最佳外源生长物质及浓度配比,本研究分别以不同浓度(0~1.0 mmol·L-1)的褪黑素(melatonin,MT)、水杨酸(salicylic acid,SA)、5-氨基乙酰丙酸盐酸盐(5-aminolevulinic acid hydrochloride,5-ALA)、α-萘乙酸(1-na...

关 键 词:甜高粱  干旱胁迫  外源生长物质  种子萌发
收稿时间:2020-10-20

Effects of Exogenous Growth Substances on Seed Germination of Sweet Sorghum under Drought Stress
LIANG Jia,MAYINU·Wusiman,FANG Zhi-gang. Effects of Exogenous Growth Substances on Seed Germination of Sweet Sorghum under Drought Stress[J]. Acta Agrestia Sinica, 2021, 29(3): 610-617. DOI: 10.11733/j.issn.1007-0435.2021.03.023
Authors:LIANG Jia  MAYINU·Wusiman  FANG Zhi-gang
Affiliation:1. College of Life and Geographical Sciences, Kashgar University, Kashgar, Xinjiang 844000, China;2. Xinjiang Key Laboratory of Biological Resources and Ecology of Pamir Plateau, Kashi, Xingjiang 844000, China
Abstract:The optimal exogenous growth substance and concentration ratio was screened for promoting the sweet sorghum[Sorghum bicolor(L.)Moench]seeds germination in this study.The effects of seed germination in response to drought stress(10%PEG-6000 simulation)were investigated through seeds priming treatments,which were composed of seven exogenous growth substances at gradient concentration(0~1.0 mmol·L-1)for 2 h,including melatonin(MT),salicylic acid(SA),5-aminolevulinic acid hydrochloride(5-ALA),α-naphthaleneacetic acid(NAA),gibberellin(GA3),2,4-epibrassinolide(EBR)and diethyl aminoethyl hexanoate(DA-6)respectively.The results showed that:The growth substances and concentrations significantly affected the water absorption,seed germination and seedling growth,when the sweet sorghum seeds were treated with drought stress;The growth substances and the proportion concentration can be classified into 5 types,among which the seeds priming with the 4 types(NAA,5-ALA,DA-6,EBR and GA3)had no obvious effect on the drought resistance during seed germination.However,MT and SA improved the seed germination under drought stress,and the best one was the MT with 0.5 mmol·L-1.At the seedling stage,it is a fast and effective method to screen the exogenous growth substances by simulating drought stress,and this approach is feasible to some extent.
Keywords:Sweet sorghum  Drought stress  Exogenous growth substances  Seed germination
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