Temperature-induced modifications in the surface features of stamens of a tomato mutant: An SEM study |
| |
Authors: | V K Sawhney P L Polowick |
| |
Institution: | (1) Department of Biology, University of Saskatchewan, S7N0W0 Saskatoon, Saskatchewan, Canada |
| |
Abstract: | Summary Stamenless-2 (sl2/sl2) is a temperature-sensitive mutant of tomato (Lycopersicon esculentum) which exhibits altered stamen development under different temperatures (Sawhney 1983). By using scanning electron microscopy, this study was conducted to investigate the differentiation of surface features of mutant and normal stamens grown under different temperatures, with the view to further determine the role of temperature in gene expression in stamen development. Mutant stamens grown under intermediate temperatures (23 °C day/18 °C night) differed from the normal in hair production, the shape of epidermal cells and in the pattern of cuticular thickenings. Under low temperatures (18 °C day/15 °C night), all surface features of mutant stamens closely resembled the normal, whereas under high temperatures (28 °C day/23 °C night), the patterns and types of hairs, epidermal cells, stomata, and cuticular thickenings on mutant stamens were similar to that of a gynoecium. The staminal features of normal stamens were not affected by different temperatures. This study shows that the expression of the sl2/sl2 allele is influenced by temperature conditions to the extent that the pattern of cellular differentiation characteristic of either the stamens or the carpels can be induced in mutant stamens. |
| |
Keywords: | Lycopersicon esculentum Stamen Surface features Temperature-sensitive mutant Tomato |
本文献已被 SpringerLink 等数据库收录! |
|