凤仙花花逆转突变体的组织学研究

Histological Investigation on Floral Reversion of Impatiens balsamina L.

从经过卫星搭载的凤仙花种子后代中获得了可遗传的仅顶花叶化的花逆转突变体。该突变体保持了花的基本结构,但是不同程度地出现了花瓣增厚,变绿,锯齿等现象,雄蕊也片状化,早衰或完全消失。组织学观察发现,在叶化花瓣中出现了叶绿体和栅栏组织。统计分析结果表明,叶化花瓣与正常花瓣相比,组织结构上确实发生了显著变化。

The seeds of Impatiens balsamina L. were treated by space flight, and then heritable mutant plants with floral reversion occurring only in apical flower were obtained in the descendant generation. The mutants kept the basical floral structures, however, showed thicker green petals with serrate margin to some extent. Their stamens became petaloid, prematured even diminished. Histological investigation revealed that chloroplast and palisade tissue appeared in the leaf-like petals. Statistical analysis suggested that significant difference existed between the leaf-like petals and normal petals.