| Effect of Salinity on the Composition, Number and Size of Epidermal Cells along the Mature Blade of Wheat Leaves |
| |
| 作者姓名： | Yuncai Hu Urs Schmidhalter |
| |
| 作者单位： | Chair of Plant Nutrition, Technical University of Munich, D-85350 Freising, Germany |
| |
| 基金项目： | The excellent technical advice and assistance of Prof. Feucht, Mr Christof Leser and Mr Maobei Zhuo （WZW Weihenstephan, Technical University of Munich, Germany） is greatly appreciated. |
| |
| 摘 要： | Salinity inhibits leaf growth in association with changes in cell size. The objective of this study was to determine the spatial distributions of the composition, number and dimensions of epidermal cells in the mature blades of leaf four of wheat seedlings under saline conditions. Plants were grown in loamy soil either with or without 120 mmol/L NaCl in a growth chamber, and harvested after leaf four was fully developed. The results of the spatial distribution analyses of width along the blade showed that salinity not only reduced the width of the leaf blade, but that it also altered the distribution pattern of blade width along the leaf axis. The reduction in the final size of the leaf blade was associated with a reduction in the total number of epidermal cells and in their widths and lengths. This study also revealed the spatial effects of salinity on the blade and epidermal cell dimensions along the leaf axis. In particular, salinity inhibited the total cell number for interstomatal, sister and elongated cells, implying that cell division in wheat leaves is inhibited by salinity. However, the lengths of interstomatal cells were not affected by salinity （unlike those for the sister and elongated cells）, suggesting the relative contributions of cell length and numbers to the reduction in the final length of the blade under salinity is dependent on cell type.
|
| 关 键 词： | 小麦 细胞长度 细胞数量 叶表皮 盐度 |
| 修稿时间： | 2006-07-312006-10-10 |
Effect of Salinity on the Composition, Number and Size of Epidermal Cells along the Mature Blade of Wheat Leaves |
| |
| Authors: | Yuncai Hu Urs Schmidhalter |
| |
| Institution: | ( Chair of Plant Nutrition, Technical University of Munich, D-85350 Freising, Germany) |
| |
| Abstract: | Salinity inhibits leaf growth in association with changes in cell size. The objective of this study was to determine the spatial distributions of the composition, number and dimensions of epidermal cells in the mature blades of leaf four of wheat seedlings under saline conditions. Plants were grown in loamy soil either with or without 120 mmol/L NaCl in a growth chamber, and harvested after leaf four was fully developed. The results of the spatial distribution analyses of width along the blade showed that salinity not only reduced the width of the leaf blade, but that it also altered the distribution pattern of blade width along the leaf axis. The reduction in the final size of the leaf blade was associated with a reduction in the total number of epidermal cells and in their widths and lengths. This study also revealed the spatial effects of salinity on the blade and epidermal cell dimensions along the leaf axis. In particular, salinity inhibited the total cell number for interstomatal, sister and elongated cells, implying that cell division in wheat leaves is inhibited by salinity. However, the lengths of interstomatal cells were not affected by salinity (unlike those for the sister and elongated cells), suggesting the relative contributions of cell length and numbers to the reduction in the final length of the blade under salinity is dependent on cell type. |
| |
| Keywords: | cell length cell number leaf epidermis salinity wheat |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
