摘要
对田旋花营养器官的解剖学研究结果表明 ,叶为两面叶 ,栅栏组织和海绵组织发达 ,主脉为周韧型维管束 ,在其主脉的远轴面 ,紧邻下表皮的为 1～ 2层同化组织细胞。地上茎表皮内具由 2层细胞组成的同化组织 ,维管组织呈连续的环状排列 ,木质部内外侧都为韧皮部。地下根状茎的结构类似地上茎的结构。根的维管组织发达 ,在次生生长中 ,中央初生木质部导管周围薄壁细胞脱分化产生大量薄壁细胞和韧皮部分子。根状茎上的不定芽及不定根由维管形成层活动产生 。
The anatomical results of vegetative organs in Convolvulus arvensis showed that the laminas were amphistomatic leaves,with well developed palisade and spongy tissues ,which centro vein was amphicribral bundle and one or two assimilating tissue cells were next to epidermis in its abaxial face. The assimilating tissue in aerial shoot was composed of two layers of cells and vascular tissue was continous ring and phloem was located in inner and outer sides of xylem. The structure of rhizoma was the same as that of aerial shoot. The vascular tissue in roots was well developed, which a great number of parenchymous cells and phloem members were both formed by parenchymous cells around vessel of central primary xylem splitting up. The adventitious buds and adventitious roots of rhizoma are formed by action of vascular cambium. The vascular cambium of root can form the adventitious buds.
出处
《武汉植物学研究》
CSCD
2002年第3期185-187,T007-T008,共5页
Journal of Wuhan Botanical Research
基金
塔里木农垦大学研究生基金资助项目
关键词
田旋花
营养器官
不定芽发生
解剖学
Convolvulus arvensis
Vegetative organ
Adventitious bud
Anatomy
