刘翔宇,邱燕萍,陈杰忠,袁沛元

• 1:华南农业大学园艺学院
• 2:广东省农业科学院果树研究所

摘要(Abstract)：

【目的】为研究水分胁迫对荔枝果实的生长发育、糖代谢及产量的影响,【方法】以15 a生‘桂味’荔枝(Litchichinensis Sonn‘Guiwei’)为试材,设以灌溉和水分胁迫2个不同的土壤水分处理。【结果】结果表明,水分胁迫下荔枝果实的大小、单果质量降低,果实发育受到抑制。水分胁迫的荔枝坐果率显著降低,同时导致最终产量的下降。对水分胁迫条件下糖积累的研究发现,‘桂味’荔枝前期以积累还原糖为主,果实发育后期主要积累蔗糖;胁迫处理的荔枝果实糖含量前期低于灌溉的,后期总糖、蔗糖及还原糖含量都高于灌溉处理的。在荔枝果实发育后期,分解蔗糖的酸性转化酶(AI)、蔗糖合成酶(SS)及合成蔗糖的蔗糖磷酸合成酶(SPS)的活性都为水分胁迫的高于灌溉处理的,这将有助于增加胁迫的果实库强及糖的积累。【结论】因此为使果实正常生长及提高产量和品质,生产上果实发育前中期应保持足量均衡的水分供应,后期不需要过多水分。

关键词(KeyWords)： 荔枝;水分胁迫;果实生长发育;糖代谢

Abstract:

Keywords:

基金项目(Foundation): 国家荔枝龙眼产业技术体系树冠管理岗位(项目编号:CARS-33-10);; 广东省现代农业产业体系岭南水果荔枝栽培与耕作岗位项目(项目编号:LNSG 2010-08,粤财教[2009]356)

作者(Author): 刘翔宇,邱燕萍,陈杰忠,袁沛元

DOI: 10.13925/j.cnki.gsxb.2012.04.025

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