PEG胁迫下野生甘草种子萌发和幼苗生长

马海鸽; 蒋齐; 王占军; 刘华; 何建龙

doi:10.11829/j.issn.1001-0629.2013-0563

PEG胁迫下野生甘草种子萌发和幼苗生长

马海鸽¹,
蒋齐^2,3,4,
王占军⁵,
刘华⁵,
何建龙⁵

1.
宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 宁夏银川 750021
2.
1. 宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 宁夏银川 750021
3.
2. 宁夏农林科学院荒漠化治理研究所, 宁夏银川 750002
4.
5.
宁夏农林科学院荒漠化治理研究所, 宁夏银川 750002

基金项目:

宁夏科技支撑计划项目“甘草种子繁育及提高种子成苗率研究”

国家科技支撑计划项目(2011BAI05B01)

摘要: 采用聚乙二醇(PEG-6000)模拟干旱, 研究干旱胁迫对野生甘草(Glycyrrhiza uralensis)种子萌发和幼苗生长的影响。结果表明, 浓硫酸预处理可显著提高甘草种子的发芽率;PEG胁迫对甘草种子萌发进程有一定的延缓作用;低浓度PEG胁迫提高活力指数, 高浓度PEG胁迫显著抑制种子萌发(P0.05)。PEG胁迫促进甘草根长生长, 对于地上部分, 低浓度PEG(5%～10%)促进而高浓度抑制。发芽率、发芽势及萌发指数与PEG浓度间均呈极显著负相关(P0.01), 在此基础上建立了PEG浓度与发芽率、萌发指数之间的关系模型。

关键词:

English

Effects of PEG on Glycyrrhiza uralensis seeds germination and seedling growth

1.
Key Lab for Restoration and Reconstruction of Degraded Ecosystem in North-Western China of Ministry of Education, Ningxia University, Yinchuan 750021, China
2.
1. Key Lab for Restoration and Reconstruction of Degraded Ecosystem in North-Western China of Ministry of Education, Ningxia University, Yinchuan 750021, China
3.
2. Desert Institute of Academy of Agriculture and Forestry Sciences of Ningxia, Yichuan 750002, China
4.
5.
Desert Institute of Academy of Agriculture and Forestry Sciences of Ningxia, Yichuan 750002, China

Received Date: 2013-10-09
Publish Date: 2014-08-14

Abstract: Effects of drought stress simulated by polyethylene glycol (PEG-6000) on Glycyrrhiza uralensis seed germination and seeding growth were analyzed. The results showed that the pretreatment of concentrated sulfuric acid significantly improved the germination rate. PEG stress delayed the germination of G.uralensis seeds. The vigor index of seeds with 5%~10% of PEG concentration treatment was higher than that of control treatment, however, the seed germination were inhibited significantly (P0.05) with higher PEG concentration treatments. PEG stress improved the root length of G.uralensis. For the aboveground part, the lower concentration of PEG had promoting effects while higher concentration of PEG had significantly inhibiting effects. There is significantly negative correlation between PEG concentration and GR(Germination Rate), GP(Germination Potential), GI(Germination Index) and the relation models between PEG concentration and GR, GI were established.

Keywords:

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参考文献(1)

[1]

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PEG胁迫下野生甘草种子萌发和幼苗生长

English

Effects of PEG on Glycyrrhiza uralensis seeds germination and seedling growth

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