PEG胁迫对八棱海棠种子萌发及幼苗生理的影响

J4 ›› 2011, Vol. 24 ›› Issue (1): 36-39.

PEG胁迫对八棱海棠种子萌发及幼苗生理的影响

吴丽云¹, 曹帮华², 邵伟¹, 解文科¹, 李涛¹, 徐丹³

1.山东省临沂市林业局，山东临沂 276001； 2.山东农业大学林学院，山东泰安 271018； 3.山东省临沂市农业委员会，山东临沂 276001

出版日期:2011-02-20 发布日期:2011-02-20
基金资助:
山东省农业良种工程项目（30362）资助

Effects of PEG stress on seed germination and seedling physiology of Malus robusta

WU Li-Yun¹, CAO Bang-Hua², SHAO Wei¹, XIE Wen-Ke¹, LI Tao¹, XU Dan³

1. The Forestry Bureau of Linyi City, Linyi 276001, China; 2. School of Forestry, Shandong Agricultural University, Tai'an 271018, China; 3. The Agriculture Committee of Linyi City, Linyi 276001, China

Online:2011-02-20 Published:2011-02-20

摘要/Abstract

摘要：

本文以八棱海棠种子为试材，利用不同浓度PEG溶液模拟干旱条件，研究了干旱胁迫对八棱海棠种子萌发及幼苗生理的影响。结果表明：经PEG处理的种子，其相对发芽率、发芽势、发芽指数以及活力指数均随着胁迫强度的增大而逐渐降低。幼苗SOD酶活性随着PEG浓度的增加而逐渐增大，POD酶活性则相反。MDA和脯氨酸含量随着胁迫强度的增大而增大，说明PEG浓度越大对幼苗有更深的伤害。

关键词: PEG胁迫, 八棱海棠种子, 萌发, 幼苗生理

Abstract:

We investigated the influences of drought stress on the seed germination and seedling physiology of Malus robusta, which was simulated with different concentrations of PEG solution. Results show that the relative germination rate, germination potential, germination index and vigor index of the seeds processed with PEG decrease with the increase of stress intensity. SOD activity of the seedlings increases with the increase of PEG concentration, while POD activity demonstrates the opposite tendency. MDA and proline content increase with the increase of stress intensity. This indicates that higher PEG concentration cause worse damage to the seedlings of Malus robusta.

Key words: PEG stress, Malus robusta seed, germination, seedling physiology

中图分类号:

S661.4

吴丽云, 曹帮华, 邵伟, 解文科, 李涛, 徐丹. PEG胁迫对八棱海棠种子萌发及幼苗生理的影响[J]. J4, 2011, 24(1): 36-39.

WU Li-Yun, CAO Bang-Hua, SHAO Wei, XIE Wen-Ke, LI Tao, XU Dan. Effects of PEG stress on seed germination and seedling physiology of Malus robusta[J]. J4, 2011, 24(1): 36-39.