【摘要】 采用盆栽法和14C-同位素示踪技术,以杂交稻组合汕优46为对照,研究了超级杂交稻组合"两优293"、"准两优527"的光合能力和光合同化物运转分配特性。结果表明,在不同生育期,两个超级杂交稻组合与对照组合汕优46相比,其单株同化14CO2的总量均显著高于对照,达到对照的1.49~1.96倍;14C-光合同化物最终分配至穗中的比例也较对照高,且其14C-光合同化物运输至穗中的速率也比对照快。表明超级杂交稻组合"两优293"、"准两优527"具有较强的光合同化物生产和运输能力。更多还原

【Abstract】 ()¹⁴C-isotope tracer technique was used to estimate the photosynthetic capacity and photoassimilates distribution in two super hybrid rice combinations （Liangyou 293 and Zhunliangyou 527） compared with the control of Shanyou 46.The results showed that the total amount of photoassimilates per plant of the two super hybrid rice combinations was remarkably（1.49～1.96 times） higher than that of Shanyou 46 at different growth stages.The percentages of（）¹⁴C-photoassimilates partitioned into grains of the two super hybrid rice combinations were higher than those in Shanyou 46,and the rate of（）¹⁴C-photoassimilates partitioned into spike were also significantly faster than those in Shanyou 46.The results indicate that the two super hybrid rice combinations have higher photosynthetic capacity and photoassimilates transport capacity.更多还原