盐、碱胁迫与温度对黄花苜蓿种子发芽的影响

武祎; 田雨; 张红香; 杨健; 吴志红

doi:10.11829/j.issn.1001-0629.2015-0317

盐、碱胁迫与温度对黄花苜蓿种子发芽的影响

1.
吉林省教育学院,吉林长春 130022
2.
吉林农业大学动物科学技术学院,吉林长春 130118
3.
中国科学院东北地理与农业生态研究所,吉林长春 130102
4.
内蒙古农业大学动物科学技术学院,内蒙古呼和浩特 010018

基金项目:

吉林省高校科研春苗人才培育计划项目&#x02014

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盐碱及温度对黄花苜蓿种子发芽、幼苗生长和离子调节的影响(2013408)

摘要: 为了探讨盐、碱胁迫与温度交互作用对黄花苜蓿(Medicago falcata)种子萌发的影响,选用两种中性盐(NaCl、Na2SO4)和两种碱性盐(Na2CO3、NaHCO3),3个温度(10/20 ℃、15/25 ℃和25/35 ℃)处理,测定各因子对种子最终发芽率及发芽速度的影响。结果表明,盐、碱胁迫与温度及其交互作用对黄花苜蓿种子发芽均有显著影响(P<0.05)。黄花苜蓿种子发芽率和发芽速度在10/20 ℃或15/25 ℃处理下最高,并且两者之间差异不显著(P>0.05)。随着盐、碱胁迫浓度的增加,种子发芽率和发芽速度降低,且碱性盐的胁迫作用大于中性盐。25/35 ℃高温显著抑制了各个处理下黄花苜蓿种子发芽,并且加剧了盐、碱胁迫对种子萌发的抑制作用。黄花苜蓿对碱性盐和高pH有一定的耐受性,在25 mmol·L-1的Na2CO3和30 mmol·L-1的NaHCO3处理下均能良好发芽。

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English

Effects of salinity, alkalinity, temperature and their interactions on seed germination of Medicago falcata

1.
Jilin Provincial Institute of Education, Changchun 130022, China
2.
Animal Science and Technology College, Jilin Agricultural University, Changchun 130118, China
3.
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China
4.
College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China

Received Date: 2015-06-07
Publish Date: 2015-11-19

Abstract: In the present study, the effects of salinity, alkalinity, temperature and their interactions on seed germination of Medicago falcata were evaluated by treated with two neutral salts (NaCl, Na2SO4), two alkaline salts(Na2CO3, NaHCO3), and three alternating temperature(10/20 ℃, 15/25 ℃ and 25/35 ℃). The results showed that seed germination percentage and germination rate were significantly affected (P<0.05) by salinity, alkalinity, temperature and their interactions. The seed germination percentage and germination rate were the highest under treatments at 10/20 ℃ or 15/25 ℃, and there was no significant difference between them. The seed germination percentage and germination rate decreased with the increasing of salinity and alkalinity concentrations and the deleterious effect of alkali stress was more severe than salt stress. Seed germination was significantly inhibited by treatment at 25/35 ℃ which also aggravated the inhibition of alkali and salt stress on seed germination. M. falcata had some tolerance to alkaline salts and high pH which germinated well under 25 mmol·L-1 Na2CO3 and 30 mmol·L-1 NaHCO3 treatments.

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[1]

高战武,蔺吉祥,邵帅,盛后财,范春燕,屈吉宁.复合盐碱胁迫对燕麦种子发芽的影响[J].草业科学.2014,31(3):451-456[3] 祝廷成.羊草生物生态学[M].长春:吉林科学技术出版社,2004:539-542.[6] Grime J P,Campbell B D.Growth rate,habitat productivity,and plant strategy as predictors of stress response[A].Mooney H A,Winner W E,Pell E J,Chu E.Response of Plants to Multiple Stresses[M].San Diego,London:Academic Press,1991:143-159.[14] 王俊杰.中国黄花苜蓿野生种质资源研究[D].呼和浩特:内蒙古农业大学博士学位论文,2008:107-116.[23] 管博.花苜蓿发芽及早期幼苗阶段的抗逆性研究[D].长春:东北师范大学硕士学位论文,2008:17-18.

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盐、碱胁迫与温度对黄花苜蓿种子发芽的影响

English

Effects of salinity, alkalinity, temperature and their interactions on seed germination of Medicago falcata

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