东方百合鳞茎更新发育的碳同化物积累与分配

本文通过测量不同发育时期的碳水化合物含量来研究东方百合“Sorbonne”的碳代谢。东方百合鳞茎中的淀粉含量自下种后迅速下降,可溶性总糖和蔗糖含量在内层鳞片中于盛花期前逐渐增加,随后呈下降趋势。用扫描电镜观察到鳞片细胞中明显的淀粉颗粒,并随鳞茎的发育充满整个细胞腔。14C示踪技术分析表明,含苞期的14C-同化物分配以地上部为主,集中在花苞部位;花后期的14C-同化物分配以地下鳞茎为主,其中下位叶标记处理的鳞茎分配量占植株总14C的比例达85.8%,证实了植株的光合产物在花后期主要供应鳞茎发育膨大所需。

ACCUMULATION AND DISTRIBUTION OF ~(14)C-PHOTOSYNTHATE DURING BULB DEVELOPEMNT OF Lilium ORIENTAL HYBRID

Carbohydrate contents were determined to study the carbon metabolism in bulbs of Lilium Oriental hybrid 'Sorbonne'.The starch contents decreased significantly after planting,and the contents of total soluble sugar and sucrose increased in interior scales before the blooming stage continuously.Using the scanning electron microscope,the starch granules were observed which gathering and stuffing in scale cell during bulb development.By()~(14)C trace techniquer,it was cleared that the()~(14)C-photosynthates were mainly allocated in stalk,leaves and flower bud,especially in the bud at the growth stage of bud development.Under neath leaf()~(14)C-labelling at the stage of bloom expired,about 85.5% of()~(14)C-photosynthates were transported and stored in bulb.It was indicated that the carbon photosynthates were mainly distributed in bulb and supported the bulb development after blooming.