摘要
为对木薯块根皮层厚度及其解剖结构进行研究,以高粉品种‘新选048’、‘辐选01’和低粉品种‘华南124’为研究材料,对3个木薯品种的块根皮层与淀粉储藏区淀粉颗粒大小、皮层厚度和皮层及淀粉储藏区多项生理指标进行了测定。结果表明:3个品种块根储藏区中淀粉粒要比皮层中长;高粉品种淀粉粒在2个组织中都比低粉品种‘华南124’的长;木薯皮层厚度与淀粉含量的积累呈负相关关系,这种关系在具亲缘关系的木薯品种之间尤为明显;在对块根皮层与淀粉储藏区各项生理指标的测定中,发现3种可溶性糖及可溶性总糖在皮层中积累要远远大于淀粉储藏区,且高粉品种可溶性总糖含量在皮层与淀粉储藏区中差异最显著,这说明块根皮层对淀粉积累起了关键作用。
In order to research root cortical thickness and anatomical structure of root, the high starch cassavacultivar‘Xinxuan 048＇,‘Fuxuan 01＇and low starch cassava cultivar‘SC124＇were studied. The studydetermined the starch granule size which included in root＇s cortex and starch storage area, root＇s corticalthickness and a number of physiological indexes about root＇s cortex and starch storage area. By comparingthree cassava cultivars, there were four discoveries. Firstly, starch grain in the starch storage area was longerthan that in the cortex. Secondly, starch grain in the two plant tissues of the low starch cultivars‘SC124＇wasshorter than that of the other two high starch cultivars. Thirdly, cassava cortex thickness was negatively relatedwith the accumulation of starch content, which was especially obvious between the cassava cultivars of geneticrelationship. Finally, from the physiological index determination of the root cortex and the starch storage area,it was discovered that 3 kinds of soluble sugar and soluble sugar accumulation in the cortex was far greaterthan that in starch storage area, and the difference was the most significant in high starch cultivars, it showedthat the root cortex plays a key role in starch accumulation.
出处
《中国农学通报》
CSCD
2014年第33期89-93,共5页
Chinese Agricultural Science Bulletin
基金
微生物及植物遗传工程教育部重点实验室2012年开放课题"木薯淀粉生物合成相关酶的同工酶分析及与淀粉合成的关系"(J1104)
广西大学国家级大学生创新创业项目"木薯块根皮层厚度及其解剖结构与淀粉积累的关系"(1301110)
广西大学大学生实验技能和科技创新能力训练基金项目"木薯储藏根发育的细胞学研究"(SYJN20132309)
关键词
木薯
皮层
淀粉储藏区
淀粉积累
cassava
root cortex
starch storage area
starch accumulation
