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水稻光合作用对加富CO_(2)的响应

摘要

整个生育期经高CO_(2)(600#mu#l/L)处理的5种水稻的PSII原初光化学效率(Fv/Fm)与空气CO_(2)(350#mu#l/L)中生长的对照无明显的差异。高CO_(2)下绿黄占3号,特三矮2号和普通野生稻叶片的平均光合放氧速率分别比各自的对照有所提高,而II优4480和药用野生稻的光合速率低于对照。高CO_(2)下生长的水稻叶片叶绿素含量和类胡萝卜素含量降低,生长后期的降解加快,并抑制了水稻的暗呼吸。绿黄占3号、特三矮2号和普通野生稻的干物重在高CO_(2)下较对照均有所增加,而II优4480和药用野生稻的则下降。

关键词： 水稻; 光合作用; 加富CO_(2)

Response of rice photosynthesis to CO_(2) enrichment

Abstract

The CO_(2) concentrations in the chambers were kept at 350#mu#l/L (ambient) or 600#mu#l/L (elevated) monitoring by an infrared CO_(2) analyzer with computer. Fv/Fm in leaves of rice species and varieties including Oryza sativa Luhangzhan 3, O. sativa Tesanai 2, O. sativa II You 4480, O. officinalis (wild rice species) and O. spontanea (wide rice species) showed no significant difference between plants growing under elevated and ambient CO_(2). As compared with the control at ambient CO_(2), the average photosynthetic oxygen evolution rates of Luhuangzhan 3, Tesanai 2 and O. spontanea under elevated CO_(2) were 9%-20% higher, while those of cv. II You 4480 and O. officinalis were 7%-12% lower. The photosynthetic pigment content and dark respiratary rate of rice leaves decreased under elevated CO_(2) were observed in Luhuangzhan 3, Tesaniai 2 and O. spontanea, but a decrease was found in II You 4480 and O. officinalis. Photosynthetic acclimation was not observed in cv. Luhuangzhan 3, Tesanai 2 and O. spontanea in a longterm experiment with elevated CO_(2).

Key words: Rice;Photosynthesis;CO_(2) enrichment

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引用本文：

. 水稻光合作用对加富CO_(2)的响应[J]. 生理学报 1998; 50 (3): .

. Response of rice photosynthesis to CO_(2) enrichment. Acta Physiol Sin 1998; 50 (3): (in Chinese with English abstract).