不同种类柑橘的抗旱性及其与内源激素变化的关系

应用生态学报

不同种类柑橘的抗旱性及其与内源激素变化的关系

马文涛^1,2,樊卫国^1,2**

(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)

出版日期:2014-01-18 发布日期:2014-01-18

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

MA Wen-tao^1,2, FAN Wei-guo^1,2

(¹Guizhou Fruits Engineering Technology Research Centre, Guiyang 550025, China; ^2Research Institute for Fruit Resources of Karst Mountain Region, Guizhou University, Guiyang 550025, China)

Online:2014-01-18 Published:2014-01-18

摘要/Abstract

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.

Abstract: Eight plant seedlings of citrus species, Citrus tangerina, C. erythrosa, C. chuana, Poncirus trifoliate, C. sinensis×P. trifoliate, C. grandis, C. sinensis and C. vessucosa were used to investigate the effects of drought stress on plant biomass, drought resistance coefficient and leaf hormone (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resistance index and drought resistance showed in order of C. erythrosa > C. tangerina > P. trifoliate > C. chuana > C. sinensis ×P. 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. tangerina 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 species showed in order of ABA > GA₁₊₃, ZR > IAA.

马文涛1,2,樊卫国1,2**. 不同种类柑橘的抗旱性及其与内源激素变化的关系[J]. 应用生态学报.

MA Wen-tao1,2, FAN Wei-guo1,2. Relationship between drought resistance and endogenous hormone content in different citrus species.[J]. Chinese Journal of Applied Ecology.