赤霉素与细胞分裂素对葡萄果实邻近叶光合特性及果实品质的影响

Effects of GA_3 and CPPU on grape fruit adjacent leaf photosynthesis and fruit quality

以‘阳光玫瑰’葡萄为材料,在连栋避雨大棚栽培条件下,研究了花后两周同一浓度赤霉素(GA3)与不同浓度细胞分裂素(CPPU)组合对葡萄果穗邻近叶片的光合特性及果实品质的影响.结果表明:非直角双曲线模型较为适合果穗邻近叶光响应曲线拟合.在25 mg·L-1GA3分别与5、10、15、20 mg·L-1CPPU组合处理下,葡萄果穗邻近叶的净光合速率和气孔导度均随着光合有效辐射的增加而增加,胞间CO2浓度降低.25 mg·L-1GA3分别与5、10、15mg·L-1CPPU组合处理下,果实品质随着CPPU浓度的增加而提高.25 mg·L-1GA3+20mg·L-1CPPU处理下,虽然果穗邻近叶的光合能力高于其他浓度处理,但果实品质相关指标较25 mg·L-1GA3+15 mg·L-1CPPU处理时低,表明适宜的CPPU浓度可以提高果实邻近叶的光合能力及果实品质,浓度过高反而使果实品质下降.花后两周较为合理的组合为25mg·L-1GA3+15 mg·L-1CPPU.

Taken the grape cuhivar ＇ Shine Muscat＇ as the material, the effect of the combination of GA3 and CPPU on the light-response curves in the fruit adjacent leaves and fruit quality were inves- tigated two weeks after blossoming. The results showed that non-rectangular hyperbolic model was more suitable for grape fruit adjacent leaf light response curve fitting. Po and gs of fruit adjacent leaves among all treatments increased with the increasing light intensity under the combination treat- ments of 25 mg· L-1 GA3 and 5, 10, 15, 20 mg · L-1 CPPU, respectively, but Ci decreased. Fruit quality increased with the increasing CPPU concentration under the combination treatments of 25 nag · L-1 GA3 and 5, 10, 15 mg · L-1 CPPU, respectively. Grape fruit adjacent leaf photosynthesis under the 25 mg· L-· GA3＋ 20 mg· L-1 CPPU treatment was higher than the other treatments. The fruit quality under the 25 mg· L-1 GA3 ＋ 20 mg · L-1 CPPU treatment was lower than the 25 mg · L-1 GA3＋ 15 mg · L-1 CPPU treatment. It indicated that reasonable CPPU treatment concen- tration could improve fruit adjacent leaf photosynthetic ability and fruit quality. Too high concentra- tion made the fruit quality lower instead. The 25 mg· L-1 GA3 ＋ 15 mg · L-1 CPPU treatment was most appropriate in two weeks after blossoming.