| 水杨酸对盐胁迫下百日草种子萌发及幼苗生理特性的影响 |
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| 引用本文： | 黄玉梅,张杨雪,刘庆林,刘盼,黄胜岚.水杨酸对盐胁迫下百日草种子萌发及幼苗生理特性的影响[J].草业学报,2015,24(7):97-105. |
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| 作者姓名： | 黄玉梅 张杨雪 刘庆林 刘盼 黄胜岚 |
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| 作者单位： | 四川农业大学风景园林学院,四川 成都,611130 |
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| 基金项目： | 国家自然科学基金项目(31201649)资助。 |
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| 摘 要： | 以百日草品种"芳菲1号"为试材,在100mmol/L NaCl胁迫处理下,研究了不同浓度(0,0.5,1.0,1.5和2.0mmol/L)水杨酸浸种对百日草种子萌发以及不同浓度水杨酸(SA)注根和叶面喷施对幼苗生长及生理特性的影响。结果显示,SA一定程度上可以缓解盐胁迫对百日草种子萌发和幼苗生长的影响。其中,0.5,1.0,1.5mmol/L SA处理的种子具有较高的发芽势、发芽率、发芽指数、活力指数;幼苗株高、茎粗、根冠比增加;叶片叶绿素含量明显升高;超氧化物歧化酶(SOD)、过氧化物酶(POD)活性以及脯氨酸、可溶性糖、可溶性蛋白含量均变高,丙二醛(MDA)含量降低。表明0.5~1.5mmol/L的SA处理通过促进百日草叶片叶绿素合成,保护其光合作用,维持了植物的正常生长;同时,通过调节百日草抗氧化及抗渗透胁迫能力,有效缓解了盐毒害,尤其以1.0mmol/L效果最佳,2.0mmol/L的SA处理未见有明显缓解。
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| 关 键 词： | 百日草 水杨酸 盐胁迫 |
| 收稿时间： | 2014-12-15 |
Effects of salicylic acid on seed germination and seedling physiological characteristics of Zinnia elegans under salt stress |
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| HUANG Yu-Mei,ZHANG Yang-Xue,LIU Qing-Lin,LIU Pan,HUANG Sheng-Lan.Effects of salicylic acid on seed germination and seedling physiological characteristics of Zinnia elegans under salt stress[J].Acta Prataculturae Sinica,2015,24(7):97-105. |
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| Authors: | HUANG Yu-Mei ZHANG Yang-Xue LIU Qing-Lin LIU Pan HUANG Sheng-Lan |
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| Abstract: | Zinnia elegans seed (cultivar “Fangfei No.1 ”)was treated with 100 mmol/L NaCl.The effects of different concentration of exogenous salicylic acid (SA:0,0.5,1.0,1.5,and 2.0 mmol/L)on salt stress-in-juries were investigated during seed germination and seedling growth.The results indicated that SA can effec-tively alleviate the injuries of salt stress on seed germination and seedling growth of Z .elegans .Salicylic acid increased germination vigour,germination percentage,germination index,and subsequently increased plant height,stem diameter,root∶shoot ratio,chlorophyll content,proline,soluble sugar and soluble protein con-tent and superoxide dismutase (SOD)and peroxide (POD)activity under salt stress.However,malondialde-hyde (MDA)content (indicator of oxidative stress)was decreased by salicylic acid.Salicylic acid concentration of 1.0 mmol/L produced the best effects whereas no mitigation effects were observed on seed germination or seedling growth under salt stress at 2.0 mmol/L salicylic acid.It is suggested that salicylic acid concentrations of 0.5-1.5 mmol/L could be used to alleviate salt stress-induced injuries. |
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| Keywords: | Zinnia elegans salicylic acid salt stress |
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