不同种类柑橘的抗旱性及其与内源激素变化的关系  

Relationship between drought resistance and endogenous hormone content in different citrus species

作　　者：马文涛[1,2] 樊卫国[1,2] 

机构地区：[1]贵州省果树工程技术研究中心,贵阳550025 [2]贵州大学喀斯特山地果树资源研究所,贵阳550025

出　　处：《应用生态学报》2014年第1期147-154,共8页Chinese Journal of Applied Ecology

基　　金：国家科技支撑计划项目(2005BA901A04);贵州省自然科学基金项目(黔科合J字2011-2136号);贵州省科技攻关计划项目(GZ2007-3001)资助

摘　　要：以红橘、朱橘、土橘、枳、枳橙、实生酸柚、实生甜橙、黄柑为材料,进行不同降水量的长期干旱胁迫后,测定生物量、抗旱系数及叶片中赤霉素(GA1+3)、玉米素核苷(ZR)、生长素(IAA)、脱落酸(ABA)含量,分析GA1+3、ZR、IAA、ABA的相对含量变化及ABA/GA1+3、ABA/ZR、ABA/IAA与8个种类柑橘抗旱性的关系.结果表明:在降水量低于1200 mm(对照)条件下,随降水量的减少不同种类柑橘的生物量明显降低,其抗旱系数及抗旱力大小顺序为朱橘>红橘>枳>土橘>枳橙>实生酸柚>实生甜橙>黄柑.不同种类柑橘叶片中ABA含量随降水量的减少而增加,GA1+3、ZR和IAA含量随降水量的减少而降低.在抗旱性强的柑橘种类中,ABA/GA1+3和ABA/ZR的增加幅度大,ABA/IAA变化与种间抗旱力的关联度不大.ABA和GA1+3的相对含量与柑橘抗旱系数分别呈极显著正相关和极显著负相关,ZR的相对含量与抗旱性系数呈极显著或显著负相关,IAA的相对含量与抗旱性系数相关性不明显.对柑橘抗旱性的促进效果,以ABA最大,其次为GA1+3和ZR,IAA最小.Eight plant seedlings of citrus species, Citrus tangerina, C. erythrosa, C. chuana, Pon- cirus trifoliate, C. sinensisxP, trifoliate, C. grandis, C. sinensis and C. vessucosa were used to in- vestigate the effects of drought stress on plant biomass, drought resistance coefficient and leaf hor- mone （ABA, GA1＋3, ZR, IAA） changes. The results showed that, on the condition of precipitation less than 1200 mm, the biomass of different citrus species reduced obviously, and drought-resist- ance index and drought resistance showed in order of C. erythrosa 〉 C. tangerina 〉 P. trifoliate 〉 C. chuana 〉 C. sinensis xP. trifoliate 〉 C. grandis 〉 C. sinensis 〉 C. vessucosa. The leaf ABA contents of the eight species increased whereas GA1＋3 , ZR and IAA decreased, under the condition of drought stress. The ratios of ABA/GA1＋3 and ABA/ZR in the species of C. erythrosa and C. tan- gerina increased drastically, yet there was no significant correlation between the ratio of ABA/IAA and the drought tolerance. The drought-resistance index was significantly positively related to the relative content of ABA （P〈0.01）, while significantly negatively related to the relative content of GA1＋3. The function to enhance drought resistance by those endogenous hormones in the citrus spe- cies showed in order of ABA 〉 GA1＋3 , ZR 〉 IAA.

关 键 词：柑橘 干旱胁迫 抗旱性 内源激素 相关性 

分 类 号：S666[农业科学—果树学]