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中国农学通报 ›› 2015, Vol. 31 ›› Issue (12): 6-11.doi: 10.11924/j.issn.1000-6850.casb14100045

所属专题: 生物技术 小麦 农业气象

• 农学 农业基础科学 • 上一篇    下一篇

干旱胁迫对不同冬小麦品种幼苗期生理特性的影响

宋新颖,张玉梅,张洪生,穆 平,林 琪   

  1. (青岛农业大学农学与植保学院/山东省旱作农业技术重点实验室/山东省旱地作物水分高效利用科研创新团队,山东青岛 266109)
  • 收稿日期:2014-10-16 修回日期:2014-11-10 接受日期:2014-11-14 出版日期:2015-05-06 发布日期:2015-05-06
  • 通讯作者: 林 琪
  • 基金资助:
    山东省现代农业产业体系小麦创新团队;山东省农业良种工程重大课题资金“耐盐碱小麦种质资源创新与利用”。

Effect of Drought Stress on Physiological Characteristics in Different Winter Wheat Seedlings

Song Xinying, Zhang Yumei, Zhang Hongsheng, Mu Ping, Lin Qi   

  1. (College of Agronomy and Plant Protection, Qingdao Agricultural University/Key Laboratory of Dryland Farming Technology in Shandong Province/Dry Land Water-saving Farming Innovation Team, Qingdao Shandong 266109)
  • Received:2014-10-16 Revised:2014-11-10 Accepted:2014-11-14 Online:2015-05-06 Published:2015-05-06

摘要: 研究小麦幼苗时期生理指标等方面的抗旱特性,为今后抗旱小麦新品种的培育提供基础的理论依据。选用5个肥水类型不同的小麦品种,在20% PEG-6000(w/v)水分胁迫条件下,研究不同冬小麦品种幼苗时期的生理抗旱特性,并对幼苗期抗旱生理指标与抗旱指数做了相关性分析。结果表明,在20%的PEG-6000(w/v)渗透胁迫后,5个小麦品种渗透调节物质可溶性糖和脯氨酸含量均上升,且上升的程度与抗旱性一致;胁迫条件下保护酶系统SOD和POD活性均降低,其中POD活性呈先上升后降低的趋势;膜脂过氧化产物MDA含量升高。与高肥水品种相比,‘青麦7号’和‘鲁麦21’的可溶性糖和脯氨酸含量较高,随胁迫时间延长增加的幅度大;MDA含量积累的速度以及SOD、POD活性降低的速度较为缓慢。其中,可溶性糖含量、脯氨酸含量、SOD活性以及POD活性与抗旱性鉴定指标抗旱指数存在极显著相关性,可以作为小麦抗旱性鉴定的早期生理指标。

关键词: 措施, 措施

Abstract: The characteristics of drought resistance of wheat seedling period of physiological indexes, provide the basis for future theoretical basis for cultivating new varieties of drought resistance of wheat. Five different fertilizer and water types of wheat were studied under the water stress of 20% PEG-6000, and the drought resistance was identified under the condition of trough cultivation with rain-proof shelter. The results showed that five varieties of wheat soluble sugar and proline contents went up and the diversifications were consistent with the drought resistance. SOD and POD activity of protective enzyme system were reduced, the POD activity showed a trend of lower after the first rise. Membrane lipid per oxidation products MDA content increased. Compared with irrigated field cultivars, the soluble sugar and proline content of dry land cultivars ‘Qingmai7’ and ‘Lumai21’ were higher and its growth range was larger along with the stress time, the speed of accumulation of MDA content and SOD, POD activity, the reduce speed was relatively slow. The soluble sugar content, proline content and SOD activity and POD activity extremely significant correlation with drought resistance appraisal index and drought index, could be used as a preliminary identification of the early indicators of wheat drought resistance.