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| 八种胡枝子属植物种子萌发期抗旱性的比较 | |
| 引用本文： | 马彦军,曹致中,李毅.八种胡枝子属植物种子萌发期抗旱性的比较[J].甘肃农业大学学报,2009,44(5). |
| 作者姓名： | 马彦军 曹致中 李毅 |
| 作者单位： | 1. 甘肃农业大学草业学院,甘肃,兰州,730070;甘肃农业大学林学院,甘肃,兰州,730070 2. 甘肃农业大学草业学院,甘肃,兰州,730070 3. 甘肃农业大学林学院,甘肃,兰州,730070 |
| 基金项目： | 国家科技支撑计划，国家林业局重点科研项目，甘肃省科技攻关项目 |
| 摘 要： | 试验采用0、50、100、1502、00 g.L-15个质量浓度梯度的聚乙二醇(PEG-6000)为渗透介质,对胡枝子属的8个种的种子进行了渗透胁迫处理,结果表明:随着PEG浓度的增加,种子的发芽率、发芽势、发芽指数、活力指数、苗重、根长以及苗高总体呈下降趋势,低浓度(501、00 g.L-1)处理与对照差异不显著(P<0.05)或略高于对照,高浓度(100、200 g.L-1)处理与对照差异显著(P<0.05).通过对发芽率、发芽势、发芽指数、活力指数、苗重、根长以及苗高7项指标综合分析表明:供试的8个种的种子萌发期抗旱性强弱依次为:‘截叶铁扫帚’>‘白指甲花’>‘多花胡枝子’>‘二色胡枝子’>‘尖叶铁扫帚’=‘达乌里胡枝子’>‘牛枝子’>‘美丽胡枝子’. |
| 关 键 词： | 胡枝子属 PEG胁迫 种子萌发 抗旱性 隶属函数值 |
Comparative study on the drought resistance 8 species of Lespedeza in seed germination period |
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| MA Yan-jun,CAO Zhi-zhong,LI Yi.Comparative study on the drought resistance 8 species of Lespedeza in seed germination period[J].Journal of Gansu Agricultural University,2009,44(5). | |
| Authors: | MA Yan-jun CAO Zhi-zhong LI Yi |
| Institution: | MA Yan-jun1,2,CAO Zhi-zhong1,LI Yi2(1.College of Prataculture,Gansu Agricultural University,Lanzhou 730070,China,2.College of Forestry,China) |
| Abstract: | The seeds of Lespedeza(8 species) were used as materials to be treated under the drought stress by polyethylene glycols (PEG) at five levels ,0.50,100,150 and 200 g ·L~(-1). The results showed that with the increasing of PEG concentration, the seeds germination rate,germination potential,germina-tion index,vigor index,seedling weight,root length and height of seedling were all decreased, which were not significantly different between lower PEG concentration treatments and control, while significantly dif-ferent between higher PEG concentration and control. Comprehensive analysis on all the seven indexes a-bove showed that the order of drought-resistance of 8 species of Lespedeza in seed germination period was L. cuneata>L. inschanica>L. floribunda>L. bicolor>L. juncea = L. daurica>L. potaninii>h. formosa. |
| Keywords: | Lespedeza PEG stress seeds germinating drought resistance membership function value |
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