凌丽俐;彭良志;曹立;江才伦;淳长品;张广越;王振兴;

• 1:西南大学柑桔研究所
• 2:国家柑桔工程技术研究中心
• 3:西南大学

摘要(Abstract)：

以北碚447锦橙为材料,测定叶片镁质量分数、光合色素质量分数、光响应和CO2响应有关指标,研究在自然条件下缺镁对锦橙叶片光合特性的影响。结果显示,随着黄化程度增加叶片的镁质量分数显著降低,叶片受镁胁迫程度加剧。随着缺镁程度增加,叶片光合色素呈极显著的下降趋势,叶片的光饱和点、Pnmax、表观量子效率(AQY)、CO2饱和点和羧化效率(CE)显著降低,叶片的光补偿点和CO2补偿点显著提高;在光响应和CO2响应上,随着缺镁程度增加,锦橙叶片气孔导度显著降低,而细胞间隙CO2显著增大,表明缺镁锦橙的光合作用主要是受非气孔限制。这些结果为柑橘优质、高产栽培提供了理论指导和相关依据。

关键词(KeyWords)： 锦橙;缺镁;光合特性

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑项目(2007BAD61B03、2007BAD47B04);; 重庆市科委重大专项(CSTC2007AA1016);; 公益性行业(农业)科研专项(nyhyzx07-023);; 柑桔学重庆市市级重点实验室开放基金(CKLC200802);; 现代农业(柑橘)产业技术体系建设专项

作者(Author): 凌丽俐;彭良志;曹立;江才伦;淳长品;张广越;王振兴;

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