CAJ | 학술논문

叶绿素是水稻叶片进行光合作用的重要物质之一。为了研究叶片叶绿素的含量、捕光色素分子的内禀特性与饱和光强的关系，利用LI-6400XT便携式光合测定系统测量了6个水稻品种的光响应曲线，并利用光合作用对光响应的机理模型进行了拟合。结果表明：供试的6种水稻品种的饱和光强只与植物捕光色素分子的物理参数如本征光能吸收截面、激子传递到光反应中心的速率(kp)、热耗散速率(kD)和激发态的平均寿命(t)等有关，与叶片的叶绿素含量无关。
협록소시수도협편진행광합작용적중요물질지일。위료연구협편협록소적함량、포광색소분자적내품특성여포화광강적관계，이용LI-6400XT편휴식광합측정계통측량료6개수도품충적광향응곡선，병이용광합작용대광향응적궤리모형진행료의합。결과표명：공시적6충수도품충적포화광강지여식물포광색소분자적물리삼수여본정광능흡수절면、격자전체도광반응중심적속솔(kp)、열모산속솔(kD)화격발태적평균수명(t)등유관，여협편적협록소함량무관。
Chlorophyll is one of important matters for photosynthesis in rice leaf. To investigate the relationship between chlorophyll contents and saturation irradiance, light-response curves of photosynthesis for six rice varieties were measured by LI-6400XT. Then these data were simulated by a mechanistic model of light-response of photosynthesis. The results showed that there is no direct relationship between the saturation irradiance and chlorophyll contents among six rice varieties. The saturation irradiance is a function of eign-absorption cross-section, rate of photochemistry (kp), rate of heat-dissipation (kD) and average life-time of photosynthetic pigments in the excited state(t) from the mechanistic model of light-response of photosynthesis.