向日葵花盘分化与其叶龄指数的关系研究  

Study on the correlation between the sunflower flower disk differentiation and the sunflower foliar age index

作　　者：安雅杰 张润生[1] 赵君[1] 赵超[1] 

机构地区：[1]内蒙古农业大学,内蒙古呼和浩特010018

出　　处：《北方农业学报》2016年第2期41-44,48,共5页Journal of Northern Agriculture

基　　金：内蒙古农业大学科技创新培育专项基金

摘　　要：向日葵的花盘分化时期是影响产量的关键时期。研究花盘内部分化发育过程与向日葵叶龄指数的关系,找出向日葵叶片发育和花盘内部分化发育的关系,制订合理的栽培管理措施来促进植株的花盘增大、籽粒增多,取得高产,具有重大的意义。研究结果表明:向日葵的花盘分化发育过程可以分为6个时期:花盘分化前期→花盘分化期→小花分化期→雌雄蕊分化期→子房胚珠分化形成期→花粉分化形成期。花盘分化前期的叶龄指数在24%以下,花盘分化期开始时叶龄指数为24%,小花分化期开始时叶龄指数为45%,雌雄蕊分化期开始时叶龄指数为48%,子房胚珠分化形成期开始时叶龄指数为69%,花粉分化形成期开始叶龄指数86%。Sunflower flower disk differentiation is the key determinant factor for sunflower yield. The correlation between the differentiation stage of flower disk and the foliar age index and using the foliar age to predict the flower disk development are pivotal for promoting the flower disk size, increasing the flower seeds amount and facilitating the high yield of sunflower. Our data suggested that the sunflower flower disk development could be classified into six stages：the pre-differentiation stage of flower disk-the differentiation stage of flower disk- floret differentiation stage-stamen and pistil differentiation stage-ovary ovule differentiation stage- pollen differentiation stage.The foliar age index was around 24% just at the pre-differentiation stage of sunflower disk;it reached to 45% at floret differentiation stage and 48% at stamen and pistil diffentitation stage and69% at ovary ovule differentiation tage;it increased to 86% at pollen differentiation stage.

关 键 词：向日葵 花盘分化 叶龄指数 

分 类 号：S565.5[农业科学—作物学]