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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (25): 87-92.doi: 10.11924/j.issn.1000-6850.2013-0256

所属专题： 生物技术； 园艺

• 林学 园艺 园林 • 上一篇    下一篇

外源物质处理对辣椒幼苗抗冷性的影响

姜秀梅 秦勇 郭光照 陈东明 古丽皮热斯?努尔   

  • 收稿日期:2013-01-23 修回日期:2013-02-21 出版日期:2013-09-05 发布日期:2013-09-05
  • 基金资助:
    新疆维吾尔自治区 “十二五”重大专项资助项目

The Effects of Exogenous Substances on Chilling Resistance of Pepper Seedlings

  • Received:2013-01-23 Revised:2013-02-21 Online:2013-09-05 Published:2013-09-05

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摘要： 以辣椒幼苗为试验材料，分别喷施不同浓度亚精胺、壳聚糖、水杨酸、CaCl2、甜菜碱溶液，采用昼温/夜温为10℃/5℃低温胁迫5天后进行相对电导率、冷害指数、可溶性糖含量、脯氨酸含量、丙二醛(MDA)含量等指标的测定和分析，探讨外源物质对低温胁迫下辣椒幼苗的影响及作用效果。结果表明，适宜浓度的外源物质可以显著降低辣椒幼苗低温胁迫后的相对电导率、冷害指数和MDA的积累量，提高可溶性糖、脯氨酸等渗透调节物质的含量，对提高辣椒幼苗抗冷性有积极作用。亚精胺、壳聚糖、水杨酸、CaCl2、甜菜碱提高辣椒幼苗抗冷性的最佳诱导浓度分别为0.5 mmol/L、50 mg/L、2 mmol/L、10 mmol/L、10 mmol/L。

关键词: 水质, 水质

Abstract: Selected the pepper seedlings as the experimental material, different concentration of spermidine, chitosan, salicylic acid, CaCl2, betaine solution were sprayed respectively, and then relative conductivity, chilling injury index, soluble sugar content, proline content, malondialdehyde (MDA) content were measured and analyzed after 5 days under the day temperature/night temperature 10℃/5℃ low temperature stress, this paper discussed the effect of exogenous substances on pepper seedlings in low temperature stress. The results indicated that appropriate concentration of exogenous substances produce positive influence on improving cold resistance of pepper seedlings by reducing relative conductivity, chilling injury index, accumulation of MDA and increasing the osmotic regulation substances content such as soluble sugar and proline. The optimal concentrations of Spermidine, chitosan, salicylic acid, CaCl2, betaine to improve chilling resistance were 0.5 mmol/L, 50 mg/L, 2 mmol/L, 10 mmol/L, 10 mmol/L.