首页|PEG模拟干旱胁迫下29份偃麦草种质种子萌发期抗旱性评价

PEG模拟干旱胁迫下29份偃麦草种质种子萌发期抗旱性评价

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以20%聚乙二醇溶液(PEG-6000)为渗透介质模拟干旱胁迫条件,对29份偃麦草种质资源进行了种子萌发期抗旱性评价.结果表明: PEG胁迫降低了偃麦草种质资源的发芽率、发芽势、发芽指数、活力指数,抑制了胚芽和胚根的生长发育.以相对发芽率、相对胚根长、相对胚芽长、萌发抗旱指数、胁迫指数、相对发芽势及相对活力指数为依据,通过隶属函数法综合评价认为,29份偃麦草种质资源的抗旱性顺序依次为:E39＞E14＞E11＞E13＞E16＞E03＞E07＞E25＞E34＞E42＞E09＞E29＞E17＞E31＞E21＞E26＞E06＞E10＞E12＞E27＞E38＞E08＞E01＞E04＞E41＞E19＞E37＞E02＞E24.
Evaluation of Drought Resistance of 29 Accessions of Elytrigria repens at Seed Germination Stage under PEG-6000 Stress
The drought-resistance evaluation of 29 accessions of Elytrigria repens at seed germination stage was studied by simulated drought stress with 20% PEG-6000 solution. The results showed that the germination rate, germination energy, germination index and vitality index of E. repens decreased, and the length of embryonic bud and embryonic root also decreased under PEG stress. Based on the relative germination energy, relative germination rate, relative vitality index, relative embryonic bud length, relative embryonic root length, germination drought-resistance index and germination stress index, with Membership function method, the drought-resistance sequence of 29 accessions of E. repens from high to low was E39 > E14 > E11 > E13 > E16 > E03 > E07 > E25 > E34 > E42 > E09 > E29 > E17 > E31 > E21 > E26 > E06 > E10 > E12 > E27 > E38 > E08 > E01 > E04 > E41 >E19 > E37 > E02 > E24.

Elytrigia repensSeedPEG stressDrought resistanceMembership function method

李培英、孙宗玖、阿不来提

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新疆农业大学草业与环境科学学院/新疆草地资源与生态自治区重点实验室,新疆,乌鲁木齐,830052

偃麦草 种子 PEG胁迫 抗旱性 隶属函数法

新疆高校科研计划新疆高校科研计划新疆草地资源与生态实验室开放项目

XJEDU2006S18XJEDU2007G02XJDX0209-2007-01

2010

中国草地学报
中国农业科学院草原研究所 中国草地学会

中国草地学报

CSTPCDCSCD北大核心
影响因子：1.347
ISSN：1673-5021
年,卷(期)：2010.32(1)
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