Characteristics of CO2 exchange and chlorophyll fluorescence of transgenic rice with C-4 genes

文献类型： 外文期刊

第一作者： Huang, XQ

作者： Huang, XQ;Jiao, DM;Chi, W;Ku, MSB

作者机构：

关键词： transgenic rice;phosphoenopyruvate carboxylase (PEPC);pyruvate Pi dikinase (PPDK);photoinhibition of photosynthesis;chlorophyll fluorescence

期刊名称：ACTA BOTANICA SINICA （ 影响因子：0.599； ）

ISSN： 0577-7496

年卷期： 2002 年 44 卷 4 期

页码：

收录情况： SCI

摘要： The responses of photosynthesis of phosphoenopyruvate carboxylase (PEPC), pyrurate dikinase (PPDK), NADP-malic enzyme (NADP-ME) and PPDK + PEPC transgenic rice ( Oryza saltiva L.) plant to light, temperature, CO2 and the characteristics of chlorophyll fluorescence under photoinhibition conditions were studied. The results were as follows: 1. The light-saturated photosynthetic rates of transgenic rice plants were higher than that of wild type, in which the light-saturated point of PEPC and PPDK + PEPC transgenic rice plants was 200 mumol (.) m(-2) (.) s(-1) higher than that of untransformed rice and the light-saturated photosynthetic rates were 51.6% and 58.5% respectively. The carboxylation efficiency of PEPC transgenic rice plant increased by 49.3% and the CO2 compensation point decreased by 26.2% than that of untransformed rice. Under high temperature (35 degreesC), the photosynthetic rate of PEPC transgenic rice plant was higher over 17.5% than that of untransformed rice. 2. On the 8th day after photoinhibition treatment, the PS H photochemical efficiency ( F-v/F-m) and photochemical quenching ( qP) of PEK and PPDK + PEPC transgenic rice plants decreased by about 20% - 30% while the non-photochemical quenching ( qN) increased by approximately 30%. But F-v/ F-m and qP of untransformed rice decreased by over 50% while qN increased by less than 10%. The result suggested that transgenic rice plants were more tolerant to photoinhibition.

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