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农学学报 ›› 2018, Vol. 8 ›› Issue (9): 9-14.doi: 10.11923/j.issn.2095-4050.cjas18030018

所属专题: 生物技术 马铃薯

• 农艺科学 生理生化 • 上一篇    下一篇

高温胁迫对马铃薯幼苗生长和部分生理指标的影响

戴鸣凯,张志忠,刘 爽,樊佳茹,王革伏   

  1. 福建农林大学S园艺学院,福建农林大学S园艺学院,福建农林大学S园艺学院,福建农林大学S园艺学院,福建农林大学S园艺学院
  • 收稿日期:2018-03-17 修回日期:2018-05-21 接受日期:2018-05-25 出版日期:2018-09-19 发布日期:2018-09-19
  • 通讯作者: 王革伏 E-mail:1041730766@qq.com
  • 基金资助:
    福建省闽江学者科研基金(116-114120019);福建农林大学园艺学院闽江学者科研启动基金。

Effects of High Temperature Stress on Growth and Some Physiological Indices of Potato Seedlings

  • Received:2018-03-17 Revised:2018-05-21 Accepted:2018-05-25 Online:2018-09-19 Published:2018-09-19

摘要: (目的)高温逆境会严重抑制马铃薯生长发育,导致产量下降,造成严重经济损失,本论文通过分析高温胁迫对马铃薯幼苗生长情况和部分生理指标的影响,为马铃薯抗热性机制研究提供参考。(方法)实验以闽薯1号为材料,高温胁迫处理马铃薯植株,观测胁迫条件下植株生长情况变化,超氧阴离子(O2-)、丙二醛(MDA)、过氧化氢(H2O2)和脯氨酸(PRO)含量变化,超氧化物歧化酶(SOD)、过氧化酶(POD)和过氧化氢酶(CAT)等保护酶活性变化。(结果)结果表明高温对植株的株型,叶片大小,长势都造成了一定的影响;生理指标SOD呈现先上升后下降的趋势,POD与CAT则先下降后上升;MDA、O2-、H2O2、PRO含量都出现持续上升的趋势。(结论)幼苗体内活性氧的积累,膜质氧化加剧可能是导致马铃薯高温伤害的原因之一。

关键词: 甜菜, 甜菜, 种子, 引发剂, 聚乙二醇

Abstract: High temperature stress could seriously inhibit the growth and development of potatoes, leading to the decline of production and cause serious economic losses. To study heat resistance mechanism of potatoes, we analyzed the effect of potato seedlings’ growth conditions and some physiological indices under high temperatures. [Method]We tested the superoxide anion(O2-),malondialdehyde(MDA),hydrogen peroxide(H2O2) and proline(PRO) contents and the activities of superoxide dismutase(SOD), peroxidase(POD), and catalase(CAT) of potato seedlings under the high temperature treatments. The phenotypic changes before and after the high temperature treatment were also recorded. [Result]The results indicated that the high temperatures have certain effects on plant shape, leaf size and growth conditions. The contents of SOD was rising first and then decreased; values of POD and CAT were decreased first and then increased. Meanwhile, the contents of O2-, MDA, H2O2,and PRO were all increased during the examination period. [Conclusion]In summary, the accumulation of reactive oxygen species and increased membrane oxidation in potato seedlings were the reasons that may cause the damages to potatoes under high temperatures.

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