摘要
继研究了夏季高温下不同根温处理对番茄植株生长和对叶片气孔的影响后,再深入研究不同根温处理对番茄叶片显微结构的影响。以番茄为试验材料,采用营养液循环栽培法,分别对根系进行(23±1)、(28±1)和(33±1)℃3个不同的根温处理,采用石蜡切片法对植株叶片的显微结构进行观察与测量。结果表明:随着根温的升高,处理植株的叶片厚度、栅栏组织厚度、海绵组织厚度均在减小;表皮厚度、栅栏组织/海绵组织的厚度比增大。因此,根温升高对植株构成了干旱胁迫,植株为了适应高温干旱的环境而改变了自身的结构特征。
Following the study on effects of different root temperature treatments on growth and stomata of tomato plants under high temperature in summer, the influence of different root temperature treatments on microstructure of tomato leaves was studied in depth in this paper. The tomato plants were cultured with circulating nutrient solutions. Under three different root temperature treatments [（23±1）, （28±1）, （33±1）℃], the microstructure of tomato leaves were observed and measured with paraffin section method. The results showed that with the increase of root temperature, the thickness, palisade tissue thickness, spongy tissue thickness of tomato leaves all decreased, but the epidermis thickness and palisade tissue thickness to spongy tissue thickness ratio increased. Therefore, increased root temperature led to drought stress to tomato plants, and in order to adapt to the hot and drought environment, tomato plants changed their structural characteristics.
基金
高等学校博士点科研基金资助项目(20091403110002)~~
关键词
夏季高温
温室番茄
根温
叶片
显微结构
Summer heat
Greenhouse tomato
Root temperature
Leaf
Microstructure
