外源脱落酸和赤霉素对红肉脐橙果肉糖含量的影响

Effects of exogenous ABA and GA_3 on sugar concentration in flesh of Cara Cara Navel Orange

在红肉脐橙幼果期和着色前分2次喷施不同浓度的外源ABA和GA3,研究其对红肉脐橙果肉糖含量的影响.结果表明:10mg.L-1ABA处理显著或极显著提高了果实成熟时的葡萄糖、果糖和总糖含量,50mg.L-1ABA处理极显著提高了果实蔗糖含量,而100mg.L-1ABA处理极显著降低了果实葡萄糖含量;中低浓度的GA3(10、50和250mg.L-1)极显著提高了果实蔗糖含量,10mg.L-1GA3处理对果实葡萄糖和果糖含量无明显影响,但极显著提高了果实总糖含量,50、250和500mg.L-1GA3处理极显著降低了果实葡萄糖、果糖和总糖含量.表明着色前较低浓度的外源ABA处理(10和50mg.L-1)可提高果实中一种或几种糖的含量,而较高浓度的GA3处理(250和500mg.L-1)则严重阻碍了果肉中糖的积累.

The concentration of glucose, fructose, sucrose and total sugar were determined after exogenous ABA and GA3 treatment during young period of fruit and before fruit coloring in flesh of Cara Cara Navel Orange. The results showed that 10mg·L^-1 ABA treatment improved glucose, fructose and total sugar concentration significantly or very significantly, 50mg·L^-1 ABA treatment improved sucrose concentration very significantly, but 100mg·L^-1 ABA treatment reduced glucose concentration very significantly. GA3 treatment of lower and middle concentrations （ 10, 50 and 250 mg·L^-1） improved sucrose concentration very significantly, 10 mg·L^-1 GA3 treatment had no remarkable effect onglucose and fructose concentration but improved total sugar concentration very significantly, GA3 treatment of 50, 250 and 500 mg·L^-1 decreased glucose, fructose and total sugar concentration very significantly. Therefore, prove one or several kinds of sugar concentration, and 500 mg·L^-1） prohibited sugar accumulation ABA treatment of lower concentration could imbut GA3 treatment of higher concentration （250 in flesh of Cara Cara Navel Orange seriously.