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: Jiangsu Acad Agr Sci, Inst Agrobiol Genet & Physiol, Nanjing 210014, Peoples R China;Jiangsu Acad Agr Sci, Inst Agrobiol Genet & Physiol, Nanjing 210014, Peoples R China; Washington State Univ, Sch Biol Sci, Pullman, WA 99164 USA
关键词: transgenic rice;phosphoenopyruvate carboxylase (PEPC);pyruvate Pi dikinase (PPDK);photoinhibition of photosynthesis;chlorophyll fluorescence
期刊名称:ACTA BOTANICA SINICA ( 2006影响因子:0.599; )
ISSN: 0577-7496
年卷期: 2002 年 44 卷 4 期
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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