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采用14 C -葡萄糖同位素示踪技术研究高收获指数型水稻品种粤香占光合产物运转与分配特性 ,结果表明 :籽粒灌浆至成熟期间 ,14 C -葡萄糖从剑叶的总输出率为 71 .0 2 % ,显著高于对照品种 ;14 C -葡萄糖向上运转于穗、穗颈的比例大 ,向下运转于其他茎叶的比例小 ,用于籽粒充实的绝对量高 ;穗对碳水化合物具有较强的积累能力 ,光合产物向穗的运转具有流畅、量大的特点 组织切片显示 ,粤香占尽管穗颈节大维管束较少 ,但韧皮部发达 ,筛管数量多
The 14 C - glucose isotope tracing technique was used to study the translocation and distribution of photosynthate of high yield index rice varieties. The results showed that the total export rate of 14 C - glucose from flag leaves was 71.0 2%, significantly higher than the control varieties; 14 C - glucose up running in the ear, panicle neck large proportion of down to the other stems and leaves the proportion of small, the absolute amount of grain filling is high; spike carbohydrate has more Strong accumulation capacity, photosynthetic products to the operation of the spike has a smooth, large amount of features of tissue sections show that Guangdong Hong accounted despite the panicle cervical large vascular bundles less, but the phloem developed, the number of more screen