| 6个宽叶雀稗材料种子萌发期抗旱性研究 |
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| 引用本文： | 屈兴红,赵丽丽,王普昶,陈超,唐华江,曾洪学.6个宽叶雀稗材料种子萌发期抗旱性研究[J].种子,2017(4):24-27. |
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| 作者姓名： | 屈兴红 赵丽丽 王普昶 陈超 唐华江 曾洪学 |
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| 作者单位： | 1. 浙江同济科技职业学院,杭州,311231;2. 贵州大学动物科学学院草业科学系,贵阳,550025;3. 贵州省草业研究所,贵阳,550006 |
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| 基金项目： | 国家科技支撑计划(2014 BAD 23 B 03)，贵州省农业攻关计划项目(黔科合NY字[2014]3048号;黔科合NY字[2010]3049号)，国家自然科学基金项目(31560664) |
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| 摘 要： | 以6个宽叶雀稗材料为研究对象,配置6个浓度的PEG-6000溶液模拟不同的干旱胁迫强度,研究供试材料的种子相对发芽势、相对发芽率、相对发芽指数和相对活力指数随干旱胁迫强度增加的变化情况,并采用隶属函数法综合评价供试材料种子萌发期的抗旱性.结果表明:1)随PEG胁迫强度增加,宽叶雀稗种子的相对发芽势、相对发芽率、相对发芽指数和相对活力指数总体呈下降趋势.2)通过线性回归方程确定宽叶雀稗材料PW 01、PW 06、PW 08、PW15、PW 17和PW 22的半致死PEG胁迫强度分别为:-1.31,-1.48,-1.18,-1.09,-0.81 MPa和-0.86 MPa.3)6个宽叶雀稗材料种子萌发期的抗旱性强弱顺序为:PW 06＞PW 01＞PW 08＞PW 15＞PW 17＞PW 22.
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| 关 键 词： | 宽叶雀稗 PEG胁迫 种子萌发 抗旱性 |
Drought Resistance of Six Paspalum wettsteinii Materials During Germination Period |
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| QU Xinghong,ZHAO Lili,WANG Puchang,CHEN Chao,TANG Huajiang,ZENG Hongxue.Drought Resistance of Six Paspalum wettsteinii Materials During Germination Period[J].Seed,2017(4):24-27. |
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| Authors: | QU Xinghong ZHAO Lili WANG Puchang CHEN Chao TANG Huajiang ZENG Hongxue |
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| Abstract: | Seeds of six Paspalum wettsteinii were taken as the materials.The germination test was determined with different concentrations of polyethylene glycol (PEG-6000) to simulate drought stress.The relative germination potential,relative germination rate,relative germination index and relative vigor index were studied.The results showed that:1) With the increasing concentration of PEG-6000,the relative germination potential,relative germination rate,relative germination index and relative vigor index tended to decline.2) The half-lethal osmotic potential of the six P.wettsteinii materials PW 01,PW 06,PW 08,PW 15,PW 17 and PW 22 were-1.31,1.48,-1.18,-1.09,-0.81 MPa and-0.86 MPa,respectively.3) For drought resistance of six P.wettsteinii materials,the order was PW 06＞PW 01＞PW 08＞PW 15＞PW 17＞PW 22. |
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| Keywords: | Paspalum wettsteinii PEG stress seed germination drought resistance |
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