TY  - EJOU
AU  - Shan, Fujian 
AU  - Yang, Yi 
AU  - Li, angliang 
AU  - Li, Tao 
AU  - Su, Wenwen 
AU  - Han, Zhencheng 
AU  - Tao, Yuanxun 
AU  - Wen, Xiaopeng 
AU  - Li, Weijie 

TI  - Effects of <i>Actinidia valvata</i> Rootstock on Photosynthetic Characteristics, Carbohydrate Metabolism, and Fruit Quality of <i>Actinidia deliciosa</i> cv. ‘Guichang’
T2  - Phyton-International Journal of Experimental Botany

PY  - 2026
VL  - 95
IS  - 7
SN  - 1851-5657

AB  - Rootstock plays an important role in commercial horticultural production by influencing scion growth, physiology, and fruit quality. However, information on the effects of different rootstocks on kiwifruit growth and fruit quality remains limited. In this study, <i>Actinidia valvata</i> was evaluated as an experimental rootstock and compared with the commonly used <i>A. deliciosa</i> rootstock to investigate their effects on photosynthetic characteristics, carbohydrate metabolism, and fruit quality of <i>A. deliciosa</i> cv. ‘Guichang’. Leaf photosynthetic parameters, fruit quality attributes, carbohydrate contents, and the activities of enzymes related to sucrose and starch metabolism were investigated during fruit development and postharvest ripening. The results showed that vines grafted onto <i>A. valvata</i> exhibited higher photosynthetic performance at certain developmental stages. Favorable changes were also detected in several physiological indicators associated with starch and sugar accumulation. In addition, fruits from plants grafted onto <i>A. valvata</i> exhibited enhanced activities of key enzymes involved in sucrose and starch metabolism at specific sampling stages. However, for many measured variables and time points, no significant differences were detected between the two rootstocks. Overall, these results suggest that <i>A. valvata</i> has potential as an alternative rootstock for ‘Guichang’ kiwifruit, particularly with respect to carbohydrate metabolism, although its overall performance was broadly comparable to that of <i>A. deliciosa</i>.
KW  - <i>Actinidia valvata</i>; rootstock; gas exchange; sucrose metabolism; enzyme activity

DO  - 10.32604/phyton.2026.084154