| 作者 |
Zhenfeng TIAN, Na WANG*, Pingli SONG, Baotian WANG, Xiaoyang WANG, Luopeng WANG, Xindie ZHAO, Jiayi LIANG, Huajun HE, Zhangtao LIN, Ziyu QIN* |
| 摘要 |
[Objectives] This study was conducted to investigate the application time, concentrations, and combinations of plant growth regulators, aiming to screen suitable concentrations, combinations, and treatment periods for enhancing the commercial quality of the fruit. [Methods] 'Xiangfei' grape was selected as the experimental material. Treatments were applied at two stages: full bloom and 10-14 d after flowering. Three plant growth regulators, gibberellin (GA₃), forchlorfenuron (CPPU), and thidiazuron (TDZ), were used at different concentrations and in various combinations. The aim was to investigate the effects of different treatments on the seedless rate and fruit quality of 'Xiangfei' grape and to identify the optimal protocol for seedlessness induction in this cultivar. [Results] The optimal treatment protocol was the application of GA₃ 50 mg/L + TDZ 4 mg/L at full bloom, followed by clear water 10-14 d after full bloom. After this combined pre- and post-flowering treatment, a seedless rate of 73% was achieved. The corresponding fruit quality parameters were as follows: single berry weight, 17.64 g; longitudinal diameter, 28.94 mm; transverse diameter, 30.21 mm; fruit firmness, 8.41 N/cm²; and soluble protein content, 0.94 mg/g. Compared with other treatments, this protocol improved berry longitudinal and transverse diameters, fruit firmness, single berry weight, soluble solid content, and soluble protein content in 'Xiangfei' berries. It also altered the fruit shape index, reduced tannin content, and had a minimal impact on vitamin C content. [Conclusions] This study can provide a theoretical basis and technical reference for the seedlessness production of 'Xiangfei' grape. |
