Abstract Sex differentiation is an important stage in plant ontogeny.The clarification of its mechanism is of importance to the developmental biology both in theory and in practice.

• 摘要 性别分化是植物个体发育的重要阶段，其分化机理的阐明不仅在发育生物学中具有重要的理论意义，而且具有极为重要的实践价值。