摘要
对华北驼绒藜种子发育阶段的主要代谢"库"器官根、茎、果实进行了可溶性糖、淀粉和蔗糖酶的动态变化研究分析,确定其营养物质的流向及流量的大小,探索这一阶段碳水化合物的分配是否与种子低结实率有关。结果显示华北驼绒藜种子发育期间,根和茎中可溶性糖和淀粉的含量呈不断下降趋势,其中根中淀粉由盛花期到成熟期下降达48%,茎中下降幅度较小;同时这2个器官中蔗糖酶的活性也逐渐降低。果实中可溶性糖和淀粉含量呈逐渐递增的趋势,蔗糖酶活性也呈增大趋势。表明尽管根、茎通常是代谢的"库"器官,但在种子生长发育期间,根和茎转而成为"源"器官,其大量同化物流向繁殖器官。但是从同化物的流量来看,多年生的华北驼绒藜根茎中同化物的输出比例远小于一年生的作物。
The soluble sugar, starch and invertase of the roots, stems and ovaries of Ceratoides arboresens during seed development were measured peri plant. During seed development, the sol creased; the starch content in roots fell b O U Y dically to determine carbohydrate in relation to low seed set in this ble sugar and starch contents in roots and stems continuously de- 48% from the flowering stage to maturity, but there was a smaller decline in the stems; At the same time, invertase activity in the two organs gradually reduced and had reached the lowest value by the end of seed development. Simultaneously, the soluble sugar and starch contents in de- veloping fruits continuously increased and the invertase activity in them also increased. Although the root and stem are usually considered as the metabolic ＂sink＂ organs, during the period of seed growth and development, root and stem become ＂source＂ organs and their large amount of assimilates were transported to the reproduc- tive organs. However, from the aspect of assimilate flow, the proportions of assimilate losses from the root and stem of C. arboresens were far less than those of annual crops.
出处
《草业学报》
CSCD
北大核心
2013年第4期327-333,共7页
Acta Prataculturae Sinica
基金
国家自然科学基金项目(30560099)
内蒙古农业大学博士科研启动基金资助
