高晶晶;冯新新;段春慧;李健花;师忠轩;高付永;汪良驹;

• 1:南京农业大学园艺学院
• 2:徐州市果树研究所

摘要(Abstract)：

【目的】为了探讨5-氨基乙酰丙酸(ALA)在苹果生产上应用的可能性,【方法】以‘红星’和‘富士’苹果为材料,研究了生长季节喷施低质量浓度(0.05~5 mg·L-1)外源ALA对苹果叶片叶绿素相对含量(SPAD)、气体交换参数、叶绿素荧光快速诱导曲线(OJIP)、820 nm光吸收曲线以及果实品质的影响。【结果】0.05~5 mg·L-1ALA均能不同程度地提高苹果叶片SPAD,增加叶片净光合速率(P n)、瞬时羧化效率(P n/Ci)。M-PEA测定结果表明,ALA处理叶片单位面积吸收(ABS/CS)、捕获(TR0/CS)和传递(ET0/CS)的能量以及光合性能指数(PI ABS和PI CS)均有不同程度升高,PSI反应中心的氧化和再还原速率上升,同时以热形式耗散的能量(DI o/CS和DI o/RC)下降,表明低浓度ALA可以显著促进苹果叶片光合电子传递和能量转换。另外,果实成熟时,ALA处理果实的硬度、花青素、可溶性固形物、可溶性糖、可溶性蛋白和维生素C含量显著高于对照,而可滴定酸含量则低于对照。【结论】生长季节喷施低浓度ALA可以提高苹果叶片光合性能,改善果实内外品质。

关键词(KeyWords)： 苹果;5-氨基乙酰丙酸;净光合速率;叶绿素快速荧光;果实品质

Abstract:

Keywords:

基金项目(Foundation): 江苏省农业自主创新基金[CX(10)111]

作者(Author): 高晶晶;冯新新;段春慧;李健花;师忠轩;高付永;汪良驹;

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参考文献(References)：

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