摘要
在光学显微镜下对鹅掌楸属(Liriodendron)北美鹅掌楸、中国鹅掌楸和杂交鹅掌楸3个树种的次生韧皮部显微构造进行了比较研究。结果表明:鹅掌楸属3个树种的次生韧皮部纤维长度、纤维组织比量、筛管复筛板横隔数、油细胞组织比量、韧皮射线的高度和宽度等方面均存在一定差异。与杂交鹅掌楸和中国鹅掌楸相比,北美鹅掌楸有更长的筛管长度、薄壁细胞束长度和更大的纤维组织比量及油细胞组织比量。复筛板横隔数差异显示了中国鹅掌楸韧皮部系统进化程度较北美鹅掌楸高。由于外侧韧皮部射线弦向宽度显著增加,推测3种鹅掌楸外侧韧皮部的部分射线薄壁细胞仍具有垂周分裂能力。
The secondary phloem structure among three species in Liriodendron （Liriodendron chinensis,L, tulipifera and L. chinensis× tulipifera）was studied. There were obvious differences in terms of length and tissue proportion of phloem fiber, number of sieve plate bar tissue proportion of oil cell and the size of phloem ray. Compared with L. chinensis x tu- lipifera and L. chinensis, L. tulipifera had longer sieve-tube element and parenchyma strand. The larger tissue proportion in fiber and oil cell. L. tulipifera was more original while L. chinensis was more evolutionary advanced in terms of com- pound sieve plate bar number. It suggested that phloem ray parenchyma cell has anticlinal division abihty due to the in- creasing of tangential size of some rays near the outbark in the phloem.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第5期113-118,共6页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
江苏高校优势学科建设工程资助项目(PAPD)
关键词
鹅掌楸属
次生韧皮部
显微构造
系统演化
Liriodendron
secondary phloem
microscopic structure
evolution
