不同硼效率甘蓝型油菜品种中硼的形态及其相互关系

Study on boron forms and their relationship in rape cultivars with different boron efficiency

采用硼高效 (95 89,95 90 )和硼低效 (9141,95 10 5 )甘蓝型油菜品种各 2个及其 4个杂交种 (95 10 5× 95 89,95 10 5× 95 90 ,9141× 95 89,9141× 95 90 )作试材 ,研究了不同硼效率甘蓝型油菜品种及其F1代花期各部分叶片中硼的形态。结果表明 ,在B2 (0 .35mg/kg)处理下 ,硼高效品种上叶 ,中叶 ,下叶和花中水溶态硼含量和束缚态硼含量低 ,半束缚态硼含量高 ,而硼低效品种 3种硼形态的含量则与此相反 ;F1代基本居于二者之间 ,且趋向于高效品种 ;在B1(0 .2 0mg/kg)处理下 ,各叶片和花中各硼形态含量也呈现类似的特征 ,但存在例外 ,尤其在花中。B1和B2处理下 ,除B1处理上叶外 ,硼高效品种和F1代的花和叶片中水溶态硼和束缚态硼相对含量较低 ,半束缚态硼相对含量较高 ,硼低效品种与此相反。建立了硼形态之间的相互平衡关系 ,并把这种平衡关系同硼效率联系起来 ,表明硼形态和硼效率存在密切关系 ,可望由此揭示不同甘蓝型油菜品种硼效率差异的生理机制。

For further study on leaf boron forms of rape (Brassica napus L.) with different boron efficient at flowering stage, two boron efficient (9589,9590), two boron inefficient rape cultivars (9141,95105) and their four F 1 hybrid (95105×9589, 95105×9590, 9141×9589, 9141×9590) were used in this pot experiment. The results showed that the water soluble boron(S B) content and bound boron(B B) content in boron efficient cultivars was lower, while the semi bound boron(SB B)content was higher, on the contrary, in the boron inefficient cultivars, and the results in F 1 hybrid were just between that in boron efficient cultivars and in boron inefficient cultivars. A balance of boron forms was established, which showed boron forms had a close relation with boron efficiency, and it may uncover the physiological mechanism of boron efficiency.