胡杨雌雄株叶片的比较解剖学研究

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...

Leaf Blade Comparative Anatomy between the Female and the Male of Populus euphratica Oliv.

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.