正造与反季节龙眼成花碳素营养差异研究  

Carbon nutrition differences between on-season and off-season longan in flowering

作　　者：李松刚[1] 洪继旺 张蕾[1] 杨子琴[1] 

机构地区：[1]中国热带农业科学院热带作物品种资源研究所/农业部华南作物基因资源与种质创制重点实验室,海南儋州571737

出　　处：《广东农业科学》2013年第24期43-45,50,共4页Guangdong Agricultural Sciences

基　　金：中央级公益性科研院所基本科研业务费专项资金(1630032012016);国家公益性行业(农业)科研专项(2010030 21);国家荔枝龙眼产业技术体系专项资金(CARS-33)

摘　　要：花芽分化是果树产量形成最为关键的阶段,同时伴随着树体碳素的复杂转运过程,了解龙眼花芽分化过程中碳素变化对于制定合理的栽培措施、进行花期调控具有重要意义。就正造及反季节龙眼成花过程中各效应部位的糖分及淀粉含量变化进行研究,结果表明,正造及反季节龙眼花芽分化过程中在碳素累积及转化方面存在差异,正造龙眼顶芽糖分及淀粉含量在花芽生理分化后期除叶芽淀粉外均有降低趋势,而反季节龙眼顶芽在花芽分化后期不降反升,总糖含量由花芽分化前7 d的15.43 mg/g上升至花芽分化后7 d的31.38 mg/g;淀粉含量也由花芽分化前7 d的5.42 mg/g上升至8.31 mg/g。这可能与花芽分化所处的外部环境有关,也可能是氯酸钾打破了树体原有代谢。Flower bud differentition is the most critical stage of fruit yield formation, as well as a complicated carbon transfer process. It is very important to understand the changes of carbon during longan flower bud differentition process, therefore to adopt suitable planting measures and control flowering time. This study focused on the changes of sugar and starch content about on-season and off-season longan in the process of flowering. The results showed that the accumulation and transformation of carbon differed between on-season and off-season longan, sugar and starch content of on-season longan were decreasing at stage of buds physiological differentiation except leaf bud starch content, while the off-season longan flower buds in late rose instead of fall. The total sugar content increased from 15.43 mg/g （-7 d） to 31.38 mg/g （7 d）, and starch content increased from 5.42 mg/g to 8.31 mg/g during this time, which may be relevant to external environment, or tree original metabolism be broken by potassium chlorate.

关 键 词：龙眼 花芽分化 淀粉 糖分 

分 类 号：S667.2[农业科学—果树学]