摘要
为探讨CO_2浓度升高对不同秋眠型苜蓿(Medicago sativa)内源激素含量的影响,以3个不同秋眠型苜蓿品种为材料,设计3个不同的CO_2浓度梯度(700、550μmol·mol^(-1)和正常大气CO_2浓度350μmol·mol^(-1)),对苜蓿的4个生育期进行处理,测定各期叶片中内源激素含量。结果表明,CO_2浓度越高叶片中生长素(IAA)、赤霉素(GA3)含量越高,脱落酸(ABA)含量越低。整个生育期内高CO_2浓度处理有利于提高苜蓿的IAA/ABA和GA3/ABA的比值,解除休眠,保持生长。初花期和盛花期时,高CO_2浓度处理对苜蓿的内源激素有显著影响(P<0.05)。高CO_2浓度处理对半秋眠苜蓿的生长发育最为有利,其次为非秋眠型苜蓿,此外,高CO_2浓度处理能减弱秋眠型苜蓿的秋眠性,延长其生长周期。
To investigate the effects of elevated CO_2 on endogenous hormone content of three different fall dormancy alfalfa（Medicago sativa）cultivarsfor the entire growth period of alfalfa processing under three different CO_2 concentration gradient（700μmol·mol^（-1）,550μmol·mol^（-1） and normal atmospheric CO_2concentration350μmol·mol^（-1））.The results of measured in each growth stage leaves endogenous hormone showed that：the higher CO_2 concentration,the higher auxin（IAA）,gibberellin（GA3）,the lower content of abscisic acid（ABA）contentin.The IAA/ABA and GA3/ABA of the alfalfa increased by high CO_2 concentration handling throughout whole growth period,also,high CO_2 concentrations was conducive to the lifting of dormancy alfalfa,maintaining growth.Meanwhile,high CO_2 concentrations had a significant effect（P〈0.05）of endogenous hormones alfalfa when early flowering and flowering.It was most favorable for growth and development of semi Alfalfa,then the non-fall dormancy alfalfa when the air CO_2 concentration increased.The fall dormancy of fall dormancy Alfalfa decreased and the growth period was prolonged in the treatment of high CO_2 concentration.
出处
《草业科学》
CAS
CSCD
北大核心
2016年第3期442-449,共8页
Pratacultural Science
基金
2012年环保公益项目--气候变化下保护优先区脆弱性评估与保护对策研究(201209031)
关键词
CO2浓度
苜蓿
秋眠型
生育期
激素
CO2 concentration
alfalfa
dormancy
growth period
hormone
