水分胁迫对棉花叶绿素含量的影响

Effects of Water Stress on Chlorophyll Content Change of Cotton Leave(Gossypium hirsutum L.)

以中棉所92(CCRI-92)和中棉所60(CCRI-60)为材料,开展南疆膜下滴灌棉花不同灌水量对棉花叶绿素影响的田间试验,分析不同灌水量处理棉花叶片叶绿素a、叶绿素b、叶绿素a/b、叶绿素总量的变化。结果表明:在棉花整个生育期,采用不同的灌水量灌溉,各处理叶片中叶绿素含量及其叶绿素组成比例不同。水分胁迫初期,由于棉花自身抗逆系统的保护,叶绿素含量出现小幅度增加。生育后期,严重的干旱会造成叶绿素分解,植物光合作用受到抑制。水分胁迫程度越严重,叶绿素含量下降趋势越明显,但不同品种棉花在水分胁迫后与对照组相比,叶绿素含量产生显著差异的时期不同。

Field experiments were conducted in 2015 to study the effects of different irrigation amount on cotton leave chlorophyll change in Southern Xinjiang. Taking CCRI-92 and CCRI-60 （Gossypium hirsutum L. ） as material with technology of drip irrigation under film, the change of chlorophyll a, chlorophyll b, chlorophyll a / b and total chlorophyll under different irrigation was analyzed. The results showed that the whole growth stage with different irrigation treatment the content of chlorophyll and chlorophyll compositions were different. At the early stage of water stress, the content of chlorophyll slightly increased due to the protection of self-stress resistance system of cotton, then at the end of the cotton growth stage severe drought resulted in the decomposition of chlorophyll, photosynthesis was inhibited. With the water stress increased, the content of chlorophyll obviously decreased. Compared with contrast, under water stress the chlorophyll content of different cotton variety had significant difference at different period.