低温对毛果杨韧皮部筛分子胼胝质沉积的影响  

Effects of low temperature on callose deposition in the sieve elements in Populus trichocarpa

作　　者：张梦婕[1] 丁琦[2] 贺新强[2] 李仲芳[1,3] 

机构地区：[1]甘肃农业大学生命科学技术学院,甘肃兰州730070 [2]北京大学生命科学学院,北京100871 [3]天水师范学院,甘肃天水741000

出　　处：《电子显微学报》2015年第2期121-125,共5页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(No.31270219;No.31300499)

摘　　要：利用光学显微镜和扫描电子显微镜观察了低温对毛果杨韧皮部筛分子胼胝质沉积以及筛域结构的影响。观察结果显示,低温(4℃)处理1周后,毛果杨韧皮部筛分子的胼胝质沉积明显减少,筛孔的面积也呈现降低趋势。结果表明低温抑制了胼胝质在筛分子中的沉积,已有的胼胝质也快速降解消失,胼胝质沉积变化伴随着筛孔面积改变。研究结果将有助于揭示杨树年生长周期过程中环境因素对于韧皮部筛分子结构与功能的调控机制。Effects of low temperature on callose deposition in the sieve elements in Populus trichocarpa were studied by light microscope and scanning electronic microscope （ SEM ） . The results showed that 1？week low temperature （ 4 ℃） treatment repressed callose deposition in the phloem sieve elements and the area of sieve pores in the treated plants were reduced significantly. The results contribute to the understanding on the regulatory mechanisms of environmental factors on the structure and function of sieve elements in phloem during the annual growing cycle of poplar trees.

关 键 词：毛果杨 胼胝质 筛板 筛孔 

分 类 号：S792.11[农业科学—林木遗传育种]