作　　者： ; ; ; ;

机构地区： 华南农业大学生命科学学院生物学研究中心

出　　处： 《华南农业大学学报》 2010年第3期1-4,共4页

摘　　要： 在营养液栽培条件下,以7个磷效率不同的大豆基因型为材料,研究了磷有效性对大豆碳代谢的生理调控及基因型差异.结果表明:低磷胁迫显著改变了大豆地上部、地下部碳分配.在低磷胁迫条件下大豆净光合速率、气孔导度、胞间CO2浓度、蒸腾速率、根呼吸、地上部生物量和总叶面积显著降低,这种现象在磷低效基因型中表现更为明显.此外,低磷胁迫还显著提高了大豆光合磷效率和根部生物量,其中磷高效基因型的光合磷效率和生物量增加更为明显. The present study elucidated the physiological regulation of phosphorus （P） availability on soybean carbon metabolism and their genotypic variations using 7 soybean genotypes contrasting in P efficiency in hydroponics. The results showed that low P availability significantly changed carbon allocation between shoots and roots. And net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate, root respiration, shoot biomass and total leaf area are significantly decreased under low P conditions, especially in P-inefficient genotypes. But low P availability significantly increased photosynthetic P use efficiency and root biomass in soybean. Among which, P-efficient genotypes had much greater increases of photosynthetic P use efficiency and root biomass by P deficiency.

关 键 词： 碳代谢 磷胁迫 磷效率 大豆

领　　域： [农业科学]