## 3 Results  
### The Effect of Different Hormones on the Color and Quality Traits of Grape Berry  
#### 3.1.1 Effects of Different Hormones on Grape Phenotypic Characteristics  
As showed in Figure 1, ABA and MeJA were beneficial to the color conversion and maturation of grapes, while GA and NAA treatments were not conducive to the color conversion and maturation of grape berries. In the early stages of color-change, the fruit growth rate was faster. As the berries tend to mature, the growth rate of berries gradually slows down and tends to flatten as a whole. Moreover, ABA and MeJA treatments increased the size and weight of berries, while GA and NAA treatments inhibited the expansion of the berries (Table 1).  
Figure 1: Physiological characteristics of ‘Wink’ grape treated with different hormones. (**A**) Morphological and color change. (**B**) The contents of soluble sugars (glucose, fructose, and sucrose). (**C**) Color Index of Red Grape (CIRG). (**D**) The contents of anthocyanins (cyanidin-3-O-glucose chloride). Berry samples were randomly collected at 0 days after treatment (0 DAT, 16 July), seven days after treatment (7 DAT, 23 July), 14 days after treatment (14 DAT, 30 July), 21 days after treatment (21 DAT, 6 August), 28 days after treatment (28 DAT, 13 August), and 35 days after treatment (35 DAT, 20 August). Different letters on the bar graph indicate significant differences, and the same indicates no significant differences (\(p<0.05\)).  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Physiological Indexes**} & \multicolumn{5}{c}{**Different Treatment Periods**} \\ \cline{2-7}  & **Treatment** & **7 DAT** & **14 DAT** & **21 DAT** & **28 DAT** & **35 DAT** \\ \hline \multirow{4}{*}{transverse diameter (mm)} & CK & 20.53 \(\pm\) 0.59 b  & 21.35 \(\pm\) 0.61 bc  & 20.57 \(\pm\) 0.58 b  & 21.75 \(\pm\) 0.73 b  & 21.54 \(\pm\) 0.79 b  \\ \cline{2-7}  & GA & 19.87 \(\pm\) 0.63 c  & 21.19 \(\pm\) 0.74 c  & 20.34 \(\pm\) 0.36 b  & 20.98 \(\pm\) 0.63 c  & 21.31 \(\pm\) 0.82 b  \\ \cline{2-7}  & ABA & 21.01 \(\pm\) 0.34 a  & 21.96 \(\pm\) 0.58 a  & 21.54 \(\pm\) 0.41 a  & 22.12 \(\pm\) 0.25 b  & 22.27 \(\pm\) 0.29 a  \\ \cline{2-7}  & MeJA & 20.94 \(\pm\) 0.64 a  & 21.73 \(\pm\) 0.62 ab  & 21.23 \(\pm\) 0.76 a  & 22.67 \(\pm\) 0.59 a  & 22.16 \(\pm\) 0.31 a  \\ \cline{2-7}  & NAA & 19.28 \(\pm\) 0.58 d  & 19.43 \(\pm\) 0.54 d  & 19.31 \(\pm\) 0.49 c  & 19.84 \(\pm\) 0.62 d  & 20.06 \(\pm\) 0.76 c  \\ \hline \multirow{4}{*}{longitudinal diameter (mm)} & CK & 28.12 \(\pm\) 0.62 b  & 28.91 \(\pm\) 0.77 b  & 29.14 \(\pm\) 0.59 ab  & 29.11 \(\pm\) 0.99 ab  & 29.42 \(\pm\) 0.89 bc  \\ \cline{2-7}  & GA & 27.36 \(\pm\) 0.86 c  & 28.20 \(\pm\) 0.94 c  & 28.85 \(\pm\) 0.63 b  & 28.82 \(\pm\) 0.83 b  & 29.17 \(\pm\) 0.68 c  \\ \cline{2-7}  & ABA & 28.58 \(\pm\) 0.74 a  & 29.31 \(\pm\) 0.96 a  & 29.45 \(\pm\) 0.74 a  & 29.50 \(\pm\) 0.39 a  & 29.90 \(\pm\) 0.43 a  \\ \cline{2-7}  & MeJA & 28.49 \(\pm\) 0.57 ab  & 29.15 \(\pm\) 0.62 ab  & 29.32 \(\pm\) 0.92 a  & 29.31 \(\pm\) 0.65 a  & 29.61 \(\pm\) 1.03 ab  \\ \cline{2-7}  & NAA & 26.82 \(\pm\) 0.94 d  & 27.31 \(\pm\) 0.54 d  & 27.89 \(\pm\) 0.91 c  & 28.33 \(\pm\) 0.78 c  & 28.62 \(\pm\) 0.73 d  \\ \hline \end{tabular}
\end{table}
Table 1: Physiological indexes of grape berry treated with different hormones.