高产杂交稻功能叶光能吸收、传递与转化特性研究

【Objective】To investigate the primary photochemical reaction of chloroplasts in functional leaves of Liangyoupeijiu and Shanyou 63 in the reproductive growth stage , we provide theoretical insights into physiological basis for high yield of the super high-yield hybrid rice. 【Methods】Through fluorescence dynamics knowledge and professional process software,we measured and analysised chlorophyll fluorescence parameters of functional leaves of Liangyoupeijiu and Shanyou 63, and assessed characteristics of solar energy absorption, transmission and conversion. In this experiment,changes of chlorophyll content, chloroplast energy flow，the structure and status of the primary photochemical reaction and the photosynthetic apparatus in PS Ⅱ of functional leaves were studied.【Results】 Be compared with Shanyou63, chlorophyll content per unit mass in functional leaves of Liangyoupeijiu was higher by average of 14.98%, and it had a relative long period of stability and higher chla / chlb ratio.In the term of light absorption and distribution, there was no significant difference in light absorption (ABS/CSM) per unit leaf area of functional leaves, but Liangyoupeijiu maintained a high and long stability period of light energy absorption capacity, the number of active reaction centers on the unit leaf area was more then Shanyou63 , the excitation energy of QA used to restore in a high form, the energy of heat dissipation was relatively fewer, the energy transferred into the electron transport chain was higher. Fluorescence analysis showed that structures and status of the body side, the receptor side and the reaction center in PSⅡ performed better than Shanyou 63, indicated that Liangyoupeijiu had a higher efficient in the transforming light energy into chemical energy.