论文部分内容阅读
本文采用气雾法栽培方式,研究了60 d根际CO2浓度富集处理对番茄光合生理的影响.结果表明:2500μL·L–1及以上CO2浓度处理下,番茄植株叶片叶绿素含量、叶面积显著降低,叶片Mg2+-ATPase、Ca2+-ATPase和磷酸烯醇式丙酮酸羧化酶(PEPC)活性显著减少,而根系PEPC活性显著增加,叶片净光合速率、气孔导度和胞间CO2浓度均显著降低.表明根际高CO2浓度条件下,根系PEPC活性增强、叶片固定CO2的能力减弱、叶片Mg2+-ATPase和Ca2+-ATPase活性显著降低,根际长期高CO2浓度处理可能是导致植株光合生理指标下降的原因之一.
In this paper, aerobic cultivation method was used to study the effect of 60-day rhizosphere CO2 enrichment on photosynthetic physiology of tomato. The results showed that under the treatment of 2500μL·L-1 and above CO2, the leaf chlorophyll content and leaf area of tomato plants were significantly Decreased the activities of Mg2 + -ATPase, Ca2 + -ATPase and PEPC in leaves, but significantly increased the activities of PEPC in roots, and significantly decreased the net photosynthetic rate, stomatal conductance and intercellular CO2 concentration The results showed that under high CO2 concentration in rhizosphere, the activity of PEPC in roots was enhanced, the ability of CO2 fixation in the leaves was weakened, the activities of Mg2 + -ATPase and Ca2 + -ATPase in leaves were significantly decreased, and the long-term high CO2 concentration in rhizosphere could result in the decrease of photosynthetic physiological index one of the reasons.