| 化学溶液浸种对荆条种子萌发和幼苗抗旱性的效应 |
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| 引用本文： | 陈德华,杜小姣,段雪娇,张甲上,梁小红.化学溶液浸种对荆条种子萌发和幼苗抗旱性的效应[J].草原与草坪,2016(5):28-33. |
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| 作者姓名： | 陈德华 杜小姣 段雪娇 张甲上 梁小红 |
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| 作者单位： | 1. 深圳市彬绿园林有限公司,广东 深圳,518040;2. 深圳市日昇园林绿化有限公司,广东 深圳,518040;3. 北京林业大学 草坪研究所,北京,100083 |
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| 基金项目： | 深圳市科技计划项目“城市绿地节水综合技术研究(CXZZ20140418110342522)”资助 |
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| 摘 要： | 为筛选出既能提高荆条种子发芽率又能增强荆条幼苗抗旱性的化学溶液处理方式,研究了不同化学溶液浸种处理对荆条种子萌发及幼苗抗旱性的影响。结果表明:0.1%GA_3,0.2%H2O2和0.1%GA_3+0.5%CaCl_2混合溶液3种方式浸种24h均能够显著提高荆条种子的发芽势、发芽率和发芽指数。同干旱胁迫相比,0.1%GA_3+0.5%CaCl_2混合溶液浸种能够在最大程度上提高荆条幼苗的相对含水量和叶绿素含量,降低电解质渗透率和丙二醛含量,并进一步增加APX,CAT和POD的活性。混合溶液0.1%GA_3+0.5%CaCl_2浸种能够提高荆条种子的发芽率,同时有效提高荆条幼苗的抗旱性。
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| 关 键 词： | 荆条 种子萌发 抗旱性 浸种 |
Effects of chemical solution soaking on seed germination and seedling drought resistance ofVitex negundo var.heterophylla |
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| CHEN De-hua,DU Xiao-jiao,DUAN Xue-jiao,ZHANG Jia-shang,LIANG Xiao-hong.Effects of chemical solution soaking on seed germination and seedling drought resistance ofVitex negundo var.heterophylla[J].Grassland and Turf,2016(5):28-33. |
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| Authors: | CHEN De-hua DU Xiao-jiao DUAN Xue-jiao ZHANG Jia-shang LIANG Xiao-hong |
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| Abstract: | In order to find out the seed treatment methods for improving seed germination rate and drought resistance ofVitex negundo var.heterophylla seedling,the seeds were soaked in GA3 ,H 2 O2 ,CaCl2 ,GA3 +CaCl2 solutions with different concentrations for 24h,and the germination potential,germination rate and germination index were measured and the physiological index of seedlings under drought stress for 21 d were assayed as well.The results showed that the germination potential,germination rate and germination index could be signifi-cantly enhanced by seed soaking in GA3 ,H 2 O2 and GA3 +CaCl2 solutions with suitable concentration,and the treatments of 0.1% GA3 ,0.2% H 2 O2 and 0.1% GA3 +0.5% CaCl2 solutions were the best for seed germina-tion.Soaking seed in 0.1% GA3 ,0.2% H 2 O2 and 0.1% GA3 +0.5% CaCl2 solutions alleviated the drought-in-duced damage through increasing relative water content and chlorophyll content as well as decreasing electrolyte leakage and MDA content in seedlings,and 0.1% GA3 +0.5% CaCl2 solution was the most effective.Besides, soaking seed in 0.1% GA3 +0.5% CaCl2 solutions enhanced the activities of APX,CAT and POD of seedlings. |
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| Keywords: | Vitex negundo var heterophylla seed germination drought resistance seed soaking |
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