二烷氨基乙醇羧酸酯对草莓光合作用和果实品质的影响

 以草莓为试材，研究不同浓度的二烷氨基乙醇羧酸酯对草莓叶片光合作用和果实品质的影响。结果表明，与对照相比，10 、20 mg·L^-1的DA-6提高了叶片的Pn和Gs，同时还提高叶片叶绿素含量、Rubisco活性和叶片中可溶性蛋白含量。在处理后7-21d，20 mg·L^-1的DA-6显著提高叶片的Pn、Rubisco活性和叶片中可溶性蛋白含量。在整个处理过程中，40 mg·L^-1的DA-6对叶片Pn、叶绿素含量和Rubisco活性有抑制作用，但是和对照间的差异不显著。所有的DA-6处理都能提高果实的品质，其中20 mg·L^-1处理显著提高了果实的品质。这表明，适当浓度的DA-6可调节草莓叶片光合能力，并最终提高果实品质和产量。

Effects of Different Concentration of DA-6 on Photosynthesis and Fruit Quality in Strawberry

The effects of DA-6 at different concentration on leaf photosynthesis and fruit quality were studied in strawberry. The results showed that DA-6 of 10 and 20 mg·L^-1 could increase leaf photosynthetic rate, stormatal conductance, chlorophyll content, Rubisco activity and soluble protein content compared with control. Moreover, 20 mg·L^-1 DA-6 significantly enhanced leaf photosynthetic rate, Rubisco activity and soluble protein content from 7 to 21 days after treatment. However, the results also indicated that 40 mg·L^-1 DA-6 had inhibiting effects on leaf photosynthetic rate, chlorophyll content and Rubisco activity and no significant differences found with control during the whole treatment period. On the other hand, DA-6 applied in different concentrations all increased the quality of strawberry and 20 mg·L^-1 DA-6 showed the remarkable effect. It is concluded that DA-6 applied at appropriate concentration improved photosynthetic ability and finally increased fruit quality and yield.