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油菜是十字花科植物.十字花科的四强二弱雄蕊不是随意形成的,而是长期自然选择的结果.既然在同一花朵内雄蕊有强弱之分,它们的花粉在愈伤组织的诱导率方面,就可能存在差异;在强弱雄蕊的花粉细胞形态上也可能有区别.实验的结果证明了强弱雄蕊间的确存在着差异. 甘蓝型油菜强雄蕊花粉的发育程度较高,无论是自花授粉还是异花授粉,都比弱雄蕊花粉具有优势.但在花粉愈伤组织的诱导率方面,实验的结果表明,强弱雄蕊与上面所说的优势恰恰相反,弱雄蕊花粉平均诱导率高于强雄蕊;而且在花粉细胞形态特征上,两者存在明显的差别.
Brassica oleracea is a cruciferous plant.The cruciferous tetraploid two weak stamens are not randomly formed, but the result of long-term natural selection.Since the stamens have the strength and weakness in the same flower, their pollen is in callus induction There may be differences in the rate of pollen cells in the stamens may also be different morphological differences in the experimental results show that there is indeed a difference between the strong and weak stamens.Radianthus tuberosa pollen stamen development is higher, Self-pollination or cross-pollination, pollen than weak stamen has an advantage.But in the pollen callus induction rate, the experimental results show that the strong and weak stamens and the above-mentioned advantages on the contrary, the average stamen pollen induction rate Higher than the strong stamens; and morphological characteristics of pollen cells, there is a clear difference between the two.