超绿水稻色素含量及其光合特性研究

目的]研究超绿水稻叶片叶绿素含量及其光舍特性。方法]以超绿水稻沈农19．6为研究对象，以叶色淡绿的沈农12—5、沈农07－015和叶色正常的丰锦、沈农26S水稻品种作为对照，测定各品种水稻的叶绿素含量，分析其光合特性。结果]结果表明，在不同生育时期，超绿水稻叶片的叶绿素含量都极显著高于其他品种。类胡萝卜素含量的变化规律与叶绿素含量的变化规律基本一致，即具有较高叶绿素含量的同时也具有较高的类胡萝卜紊含量。整个生育期，超绿水稻叶片均保持较高的叶绿素a、叶绿素b含量，而其比值则较小；超绿水稻叶片的净光合速率没有因叶绿素含量较高而显著提高，但气孔导度和蒸腾速率始终维持在较高的水平，且在成熟期显著摘要目的]研究超绿水稻叶片叶绿素含量及其光舍特性。方法]以超绿水稻沈农19．6为研究对象，以叶色淡绿的沈农12—5、沈农07—015和叶色正常的丰锦、沈农265水稻品种作为对照，测定各品种水稻的叶绿素含量，分析其光合特性。结果]结果表明，在不同生育时期，超绿水稻叶片的叶绿素含量都极显著高于其他品种。类胡萝卜素含量的变化规律与叶绿素含量的变化规律基本一致，即具有较高叶绿素含量的同时也具有较高的类胡萝卜紊含量。整个生育期，超绿水稻叶片均保持较高的叶绿素a、叶绿素b含量，而其比值则较小；超绿水稻叶片的净光合速率没有因叶绿素含量较高而显著提高，但气孔导度和蒸腾速率始终维持在较高的水平，且在成熟期显著高于其他品种。结论]该研究结果为进一步研究和推广应用超绿水稻奠定基础。

Study on Pigment Content and Photosynthetic Characteristics of Supergreen Rice

Objective] The research aimed to study the chlorophyll content and photosynthetic characteristics of super-green rice.Method] With the super green-rice Shennong 19-6 as material, Shennong 12-5, Shennong 07-015, Fengjin and Shennong 265 as CK, the chlorophyll content and photosynthetic characteristics of all varities rice were studied.Result] The results showed that the chlorophyll content of super green-rice was significantly higher than other varieties at different stages of growth.After heading stage, as the leaves were aging, the chlorophyll content decreased.But the decrease rate was significantly lower than CK, the chlorophyll content was also higher in ripening stage.Carotenoid content and chlorophyll content were consistent with variation.The chlorophyll content and carotenoid content were both higher.Further analysis of chlorophyll a, chlorophyll b and its ratio showed that the super green-rice kept higher chlorophyll a and chlorophyll b content in all stages of growth, which caused its ratio to be low.In the whole stages of growth, the net photosynthetic rate did not significantly increase with the higher chlorophyll content, but the stomatal conductance and transpiration rate were higher than other varieties and always maintained a higher level.Conclusion] This study will lay the foundation for further researching and popularizing super-green rice.