不同橡胶品种幼苗对遮荫的生理响应及耐荫能力评价  

Physiological Response to Shade and Shade-tolerant Capability of Hevea brasiliensis Seedlings of Different Varieties

作　　者：原慧芳[1] 陈国云[1] 寸明[1] 田耀华[1] 

机构地区：[1]云南省热带作物科学研究所,云南景洪666100

出　　处：《西北植物学报》2014年第3期550-559,共10页Acta Botanica Boreali-Occidentalia Sinica

基　　金："十二五"国家科技支撑计划项目(2011BAD30B01);云南省科研院所技术开发研究专项(2011CF017);农业部热作农技推广与体系建设项目(11RZNJ-14);中国科学院战略性先导科技专项子课题(XDA05070303)

摘　　要：以不同遮荫条件(100%、50%、25%和5%自然光)下适应生长1年后的6个橡胶品种幼苗为研究对象,测定分析了干季和雨季时幼苗叶片多项生理生化指标的变化特征,并对幼苗的耐荫性进行综合评价。结果表明:(1)不同光处理对所有6个橡胶品种幼苗叶片的超氧化物歧化酶(SOD)活性、可溶性蛋白质(SP)含量、可溶性糖(SS)含量、蔗糖(Suc)含量、叶绿素(Chl)含量、叶绿素a/b(Chl a/b)、脯氨酸(Pro)含量、丙二醛(MDA)含量和质膜相对透性(RMP)都有显著影响,且幼苗叶片的SOD、SP、SS、Suc、Chl、Chla/b和RMP在6个品种之间也有显著差异。(2)与雨季相比,干季时各品种的SS和Chl显著下降,而SOD、SP、Suc、Pro、Chla/b、MDA和RMP显著升高。(3)各品种的SP、SS、Suc、SOD和MDA均随着光强的减弱而下降。(4)主成分分析法筛选结果显示,与橡胶幼苗对光强反应密切相关7个生理生化指标是SP、SS、Suc、SOD、Pro、Chl a/b和MDA;9个生理生化指标的平均隶属度比较发现,干季和雨季对光强变化适应能力较强的3个品种是‘RRIM600’、‘云研77-4’和‘云研77-2’,‘GT1’和‘PR107’品种次之,‘热研523’品种最弱。In order to compare the different adaptive ability of rubber seedlings to irradiance change among six varieties （ ‘GT1 ’, ‘ RRIM600 ＇, ‘ PR107 ’, ‘ Yunyan 77-4 ＇, ‘ Yunyan 77-2 ＇ and ‘ Reyan 523 ＇ ）, we grew the seedlings of each variety in four irradiance levels （100% ,50%,25% ,5%） for one year, then we com- pared some biochemical parameters of seedling leaves at dry and rainy season. The results indicated： （1）For each variety,there were significant differences for SOD,SS,Guc,Chl,Chl a/b,SP and RMP among four ir- radiances,and the varieties also have significant effect on these parameters. （2）For each variety,in dry sea- son,SS and Chl decreased and SOD,SP,Suc,Chl a/b,Pro and MDA increased significantly when compared with rainy season. （3）For all six varieties,SP,SS,Suc,SOD and MDA decreased with the decreasing irradi- ance. （4）Seven parameters （SP,SS,Suc,SOD,Pro,Chla/b and MDA） were found that are strongly correla- ted with physiological adaptation to irradiance. （5） Comprehensive evaluation with subordinate functionmethod,we found ‘RRIM600＇,‘Yunyan 77-4＇ and ‘Yunyan 77-2＇ have stronger,while ‘Reyan 523＇ has weaker adaptive ability to irradiance change, and ‘ GT1 ＇ and ‘ PR107 ’ are intermediate.

关 键 词：橡胶 遮荫处理 生理生化指标 耐荫能力 综合评价 

分 类 号：Q945.78[生物学—植物学]