烟草两种质源胞质雄性不育系营养元素差异分析OA

In order to compare the differences in yield and nutrient element contents between different cytoplasmic male sterile(CMS)lines and their maintainer lines of tobacco,we used CMS lines with different cytoplasmic sources,Nta(sua)S K326[(sua)S],Nta(gla)S K326[(gla)S],and the maintainer line K326(MF K326),as materials.We investigated the morphology of stamens and pistils,seed yield,and the contents of nutrient elements in different parts and at different stages of these three genotypes.The results showed that compared with the normal stamens and pistils of MF K326,the pistils of(gla)S were normal,while the stamens were degenerated,with short filaments and shrunken anthers.The pistils of(sua)S were normal or flattened or split,and the stamens were feminized,with stigma-like structures growing at the tips of the filaments.The seed yields of MF K326 and(gla)S were 1.51 and 1.38 times that of(sua)S,respectively.There were no significant differences in the total nitrogen,magnesium,boron,and copper contents among different genotypes in leaves and flowers or fruits at different stages.The potassium content in MF K326 was significantly higher than that in the two CMS lines in leaves and stamens and pistils at three stages.The phosphate content of the two CMS lines was always lower than that of MF K326 at different stages,except for the leaves at the green fruit stage.Iron and calcium accumulated in the flowers/fruits of the CMS lines at different stages.The zinc content of(sua)S was lower than that of the other two genotypes in leaves at the full bloom and green fruit stages.The manganese content of(sua)S was the lowest in flowers/fruits at different developmental stages and in stamens and pistils,while the manganese content of(gla)S was the highest at different developmental stages.This study preliminarily analyzed the relationship between nutrient elements and seed yield,providing a reference for potential seed production and yield improvement of(sua)S.