Prasad T K, Sack F D, Cline M G
Department of Botany, The Ohio State University, Columbus 43210, USA.
Am J Bot. 1988 Nov;75(11):1619-24.
The effects of shoot inversion on stem structure over 72 hr were investigated in Pharbitis nil by analyzing cell number, cell length, and the cross sectional areas of cells, tissues, and regions. An increase in stem diameter can be attributed to an increase in both cell number and cross sectional area of pith (primarily) and vascular tissue (secondarily). Qualitative observations of cell wall thickness in the light microscope did not reveal any significant effects of shoot inversion on this parameter. The inhibition of shoot elongation was accompanied by a significant decrease in cell length in the pith. The results are generally consistent with an ethylene effect on cell dimensions, especially in the pith.
通过分析细胞数量、细胞长度以及细胞、组织和区域的横截面积，研究了72小时内牵牛茎倒置对茎结构的影响。茎直径的增加可归因于髓（主要）和维管组织（次要）的细胞数量和横截面积的增加。光学显微镜下对细胞壁厚度的定性观察未发现茎倒置对该参数有任何显著影响。茎伸长的抑制伴随着髓细胞长度的显著减少。结果总体上与乙烯对细胞尺寸的影响一致，尤其是在髓中。
