紫杉叶片结构与水分蒸腾速率初步研究  

Preliminary study on leaf structure and water transpiration rate of Taxuscuspidata

作　　者：任宣百 刘景巍 唐晓杰[3] 程广有[3] 

机构地区：[1]吉林省林业技术推广站,吉林长春130022 [2]吉林市松花湖国有林保护中心,吉林吉林132013 [3]北华大学林学院,吉林吉林132013

出　　处：《吉林林业科技》2018年第2期7-10,共4页Journal of Jilin Forestry Science and Technology

基　　金：吉林省科技攻关项目:紫杉优质高效栽培技术研究与示范(20110913);东北红豆杉优良品种选育与工厂化育苗技术研究(20140204005NY);东北红豆杉良种工厂化繁育技术研究(2015Y078)

摘　　要：通过对紫杉叶片进行解剖观察及蒸腾作用测定,探讨了叶片结构与水分蒸腾的关系,结果表明:气孔分布于叶片背面,纵向气孔线有8~10条,气孔带有2条,并分为四胞型气孔、五胞型气孔、六胞型气孔3种类型;叶片上下表皮各一层细胞,上表皮具较薄一层角质层,角质层平均厚度为1.02μm,中间为叶肉细胞,叶片结构不具有抗干旱特征。叶片早晨和傍晚蒸腾速率较低,在中午蒸腾速率到达峰值,平均蒸腾强度和最大蒸腾强度不同月份之间差异较大,从4月到6月逐渐增加,尤其是5月到6月增加幅度更大。The relationship between leaf structure and water transpiration was discussed through anatomical observation and determination of transpiration of leaf. The result showed that stomata of Taxuscuspidata were distributed on the back of the leaf,with 8 ~ 10 longitudinal stomatal lines and 2 stomata. The stomata of Taxuscuspidata leaves were divided into four types of stomata,five cell type stomata and six cell type stomata. The epidermis of the upper and lower epidermis of the leaves of Taxuscuspidata leaves,the upper epidermis with a thin layer of cuticle and the average thickness of the cuticle is1. 02 μm. Mesophyll cells were in the middle. The leaf structure of Taxuscuspidata had not anti-arid characteristics. The transpiration rate of Taxuscuspidata leaves in the morning and evening was lower and the transpiration rate reached the peak at noon. The average transpiration intensity and maximum transpiration intensity of Taxuscuspidata varied greatly from month to month. It increased gradually from April to June,especially from May to June.

关 键 词：紫杉 叶片结构 水分蒸腾 

分 类 号：S791.49[农业科学—林木遗传育种]