干旱胁迫对3个茶树品种含水量与叶绿素含量的影响

Effects of Drought Stress on Relative Water Content and Chlorophyll Content of Three Tea Cultivars

为探明茶树含水量、叶绿素含量与其抗旱性的关系,以四川省主栽茶树品种特早213、名山131和福鼎大白茶1年生幼苗为对象,采用水培方法并施以不同浓度的聚乙二醇6000(PEG-6000)进行模拟干旱胁迫试验。结果表明:茶树幼苗叶片相对含水量在不同品种、不同胁迫浓度及不同胁迫时间处理间差异显著(P<0.05),干旱胁迫12d后茶树幼苗叶片的相对含水量为名山131>特早213>福鼎大白茶。3个品种的叶绿素a、叶绿素b及叶绿素总量间差异不显著,在不同胁迫浓度间差异极显著(P<0.01)、不同胁迫时间下差异显著(P<0.05)。综合看,3个茶树品种的抗旱性为名山131>特早213>福鼎大白茶。

In order to study the relationship of drought resistance with relative water content and chlorophyll content,taking 1-year seedlings of three tea cultivars（Tezao 213, Mingshan 131,Fudingdabaicha）cultivated in Sichuan Province as the materials,a simulated drought stress test was conducted with water culture method and different concentration of polyethylene glycol 6000（PEG-6000）.The results showed that the relative water content of tea seedlings leaves was significantly different amount different cultivars,different stress concentrations and different stress times.After 12 days of drought stress,the relative water content of tea seedlings leaves was Mingshan 131Tezao 213Fudingdabaicha.There were no significant differences in chlorophyll a,chlorophyll b and total chlorophyll amount the three cultivars,and the cultivars were significantly different under different stress concentrations and different stress times.In conclusion,the drought resistance of the three tea cultivars was Mingshan 131Tezao 213Fudingdabaicha.