中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 赤霉素浸种对PEG模拟干旱条件下多年生黑麦草种子萌发的影响 草业科学 2019 (9) 2304-2311
Position: Home > Articles > 赤霉素浸种对PEG模拟干旱条件下多年生黑麦草种子萌发的影响 Pratacultural Science 2019 (9) 2304-2311

赤霉素浸种对PEG模拟干旱条件下多年生黑麦草种子萌发的影响

作  者：
单旭东;张睿;麦吾丽代·卡哈尔;古丽娜尔·努尔达吾列提;许立新
单  位：
北京林业大学草坪研究所
关键词：
多年生黑麦草;赤霉素;聚乙二醇(PEG);种子萌发
摘  要：
为研究赤霉素浸种对PEG模拟干旱条件下多年生黑麦草(Lolium perenne)种子萌发的影响.本研究对多年生黑麦草"麦迪"进行了4种浓度(0、100、200和300 mg·L–1)的赤霉素浸种处理.浸种24 h后分别在不同浓度PEG(0、5%、10%和15%PEG)胁迫下进行发芽试验,在第5天时测定发芽势,第14天测定发芽率、芽长、根长、芽抑制率、根抑制率和根冠比.结果表明,随着干旱胁迫程度的提高,多年生黑麦草种子发芽势、发芽率和芽长呈现减小趋势,根长呈现先增大后减小的趋势.在0、5%和10%PEG胁迫中,赤霉素浸种处理种子的发芽率均无明显影响,但在15%PEG胁迫时,200和300 mg·L–1赤霉素浸种处理能够明显缓解干旱对多年生黑麦草种子发芽率的抑制作用.在各干旱胁迫下,200和300 mg·L–1赤霉素浸种处理能降低芽抑制率,且能提高多年生黑麦草的根冠比.综上所述,缓解干旱对多年生黑麦草萌发的抑制作用,促进其幼苗生长的最适赤霉素处理浓度为200~300 mg·L–1.
作  者：
SHAN Xudong;ZHANG Rui;Maiwulidai·Kahar;Gulinaer·Nuerhawulieti;XU Lixin;Lawn Research Institute of Beijing Forestry University;
关键词：
perennial ryegrass;;gibberellin;;polyethylene glycol(PEG);;seed germination
摘  要：
To study the effects of gibberellin soaking on the germination of perennial ryegrass(Lolium perenne) seeds,germination indices were investigated under simulated drought conditions. The perennial ryegrass ‘Mathilde' was soaked with four concentrations of gibberellin: 0, 100, 200, and 300 mg·L~(–1). After 24 h of seed soaking, the germination test was performed under Polyethylene glycol(PEG) stress at different concentrations(0, 5%, 10%, and 15%). The germination potential was measured on the fifth day, and the germination rate, bud length, root length, bud inhibition rate, root inhibition rate, and root-shoot ratio were measured on the fourteenth day. The results showed that with the increase in drought stress,the germination potential, germination rate, and bud length of perennial ryegrass showed a decreasing trend, and the root length first increased and then decreased. Gibberellin treatment had no significant effect on seed germination rate under 0,5%, and 10% PEG stress; however, soaking in 200 mg·L~(–1) and 300 mg·L~(–1) gibberellin could significantly alleviate the inhibitory effect of drought on the seed germination rate of perennial ryegrass under 15% PEG stress. The seed soaking treatment(200 mg·L~(–1) and 300 mg·L~(–1)) could reduce the rate of bud inhibition and increase the root-shoot ratio of perennial ryegrass under various drought stresses. In conclusion, the optimum concentration of gibberellin for inducing seed germination, enhancing seedling growth, and alleviating drought stress of perennial ryegrass was 200～300 mg·L~(–1).

相似文章

导出引用
计量
文章访问数: 12
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46