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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (21): 44-48.

所属专题： 小麦

• 农学 农业基础科学 • 上一篇    下一篇

PEG处理下青海栽培小麦萌发期及幼苗期抗旱性研究

李凤珍 马晓岗   

  • 收稿日期:2011-03-30 修回日期:2011-05-05 出版日期:2011-08-25 发布日期:2011-08-25
  • 基金资助:

    作物种质资源繁殖更新与创新

Study on Drought-resistance of Wheat Varieties at Germination Stage and Seedlings in Qinghai

  • Received:2011-03-30 Revised:2011-05-05 Online:2011-08-25 Published:2011-08-25

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摘要：

为了给青海小麦抗旱性育种提供依据，以7个青海省培育并已大面积推广的普通小麦品种为材料，经过渗透胁迫处理（20% PEG6000），研究小麦萌发期胚芽鞘长度及萌发率的变化和幼苗期部分生化指标（脯氨酸、过氧化氢酶(CAT)、可溶性糖）的变化。结果表明：渗透胁迫处理后，小麦萌发期胚芽鞘生长缓慢且萌发率低；幼苗期脯氨酸含量、可溶性糖的含量升高，CAT活性上升。初步判断出7个品种的抗旱性为‘小红麦’、‘阿勃最强’；‘乐麦5号’、‘互麦11’和‘山旱901’次之；‘互助红’和‘互麦15’抗旱性最弱。

关键词: 抗性淀粉结构, 抗性淀粉结构

Abstract:

In order to provide drought-resistance evidence of wheat breeding in Qinghai, seven wheat cultured varieties in Qinghai were researched on their coleoptile length and germination rate change in germination stage and several biochemical indices (proline, CAT, dissolubility candy) in seedling between control groups and treatment groups (PEG6000 0f 20%). The result indicated that coleoptile of these wheat varieties grew slowly under PEG6000 0f 20%, proline content and soluber sugar content rise, CAT activity rise in seedling. Drought-resistance of seven wheat varieties were ranged according to drought-resistance indexes: ‘Xiaohongmai’ and ‘Abo’ were the best, ‘Lemai5’, ‘Humai11’ and ‘Shanhan901’ were better, ‘Huzhuhong’ and ‘Humai15’ were the worst.