摘要
应用石蜡切片法对胡杨(Populus euphratica Oliv.)雌、雄株叶片进行比较解剖研究,结果表明:(1)胡杨雌、雄株叶片都由表皮、叶肉与叶脉构成,表皮由2层细胞构成复表皮;上、下表皮内均分化出了2～3层栅栏组织细胞,栅栏组织之间有少量海绵组织细胞;主脉维管束通常1个,由木质部、韧皮部、少量形成层及类似禾本科植物的维管束鞘所构成.(2)胡杨雌株叶片的表皮细胞厚度、角质层厚度、叶片厚度、栅栏组织厚度、主脉维管束高度及木质部高度都明显大雄株.(3)雌雄株叶片上、下表皮气孔的数目、栅栏组织在叶肉中的百分比、主脉维管束木质部所占的百分比存在一定差异,但是方差分析结果表明其差异不显著.(4)胡杨叶片的解剖结构具有旱生植物叶片的典型特点,但其雌株叶片旱生结构特点更明显,可能与雌雄株生殖功能相关.
The anatomical characteristics of females and males from Populus euphratica Oliv.were studied by paraffin section.The results are as follows：（1） All the female and the male leaves are composed of leaf epidermis,mesophyll and vein.Leaf epidermis is multi-epidermis usually composed of 2 layer cells.Near by adaxial and abaxial hypodermis,there are 2～3 layer palisade tissue cells.Between palisade tissue cells,there are a few sponge tissue cells.The number of vascular bundle in main vein is usually single,and they are composed of xylem,phloem,a little cambium and vascular bundle sheath that are similar to Poaceae＇.（2）The female thickness of epidermal cells and horny layer,the thickness of mesophyll and palisade tissue,and the height of vascular bundle and xylem are obviously bigger than male＇.（3）The female stomata numbers in epidermis,the percentage of palisade tissue in mesophyll and the precentage of xylem in main vein vascular bundle are a little different from the male,but the results of analysis of correlation and variance showed they are not significant.（4）The anatomical characteristics of the female leaves and the male leaves are accord with xerophyte,but the female characteristics to the responses of drought are more obvious than the male＇ and it is possible to related with their reproductive function.
出处
《西北植物学报》
CAS
CSCD
北大核心
2011年第1期79-83,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
教育部科学技术研究重点项目(207138)
新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室开放基金课题(BR0710)
关键词
胡杨
雌株
雄株
叶片
比较解剖
Populus euphratica
female
male
leaf blade
comparative anatomy
