@Article{phyton.2024.058083,
AUTHOR = {Yunqi Zhang, Ying Li, Yashi Deng, Yilin Ou, Daocheng Ma, Dongdong Li, Weidong Xie, Zailiu Li},
TITLE = {Effects of PBO and PP<sub>333</sub> on Shoot Growth, Nutrient Accumulation, and Fruit Quality in <i>Carya Illinoinensis</i> cv. ‘Shaoxing’},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {93},
YEAR = {2024},
NUMBER = {12},
PAGES = {3293--3312},
URL = {http://www.techscience.com/phyton/v93n12/59184},
ISSN = {1851-5657},
ABSTRACT = {
To enhance the productivity of <i>Carya illinoinensis</i> cv. ‘Shaoxing’ and mitigate the loss of flowers and fruits, the effects of different concentrations of Piperonyl Butoxide (PBO) wettable powder (2, 5, and 10 g·L<sup>–1</sup>) and Paclobutrazol (PP<sub>333</sub>) (150, 300, and 450 mg·L<sup>–1</sup>, based on active ingredients) on 6-year-old ‘Shaoxing’ plants were investigated with water sprayed as the control. The results showed that: (1) Treatment with 10 g·L<sup>–1</sup> PBO and 450 mg·L<sup>–1</sup> PP<sub>333</sub> significantly inhibited the excessive growth of ‘Shaoxing’ branches. Also, 10 g·L<sup>–1</sup> PBO exhibited the best diameter increment effect on fruiting branches, and 150 mg·L<sup>–1</sup> PP<sub>333</sub> exhibited the best diameter increment effect on vegetative branches. (2) The content of soluble sugar and soluble protein in leaves treated reached the highest level after treatment with 450 mg·L<sup>–1</sup> PP<sub>333</sub>, while the content of starch sugar in leaves reached the highest level after treatment with 300 mg·L<sup>–1</sup> PP<sub>333</sub>. The application of PBO and PP<sub>333</sub> mitigated the decline in N, P, K, and other nutrient levels observed in the leaves of ‘Shaoxing’. As the PBO and PP<sub>333</sub> concentrations increased, the nutrient elements in the leaves first increased and then decreased. Among them, 300 mg·L<sup>–1</sup> PP<sub>333</sub> treatment exhibited the best effect on increasing the content of N, P, and K in the leaves at the late stage of fruit development. (3) In terms of fruit setting rate and nutritional quality of ‘Shaoxing’ fruit, 5 g·L<sup>–1</sup> PBO treatment showed the most promising effect on improving fruit setting rate, 150 mg·L<sup>–1</sup> PP<sub>333</sub> exhibited the best effect on improving reducing sugar and decreasing tannin content in the kernel, 10 g·L<sup>–1</sup> PBO had the best effect on improving the crude fat content, and 2 g·L<sup>–1</sup> PBO had the best effect on improving the cellulose content in the kernel. (4) Principal component analysis showed that 450 mg·L<sup>–1</sup> PP<sub>333</sub> treatment had the most comprehensive regulatory effect on the growth and development of current-year branches, leaves, and fruits of ‘Shaoxing’. This study provided a theoretical basis and data reference for the growth and development of <i>C. illinoinensis</i> cv. ‘Shaoxing’ fruits from the perspective of the application of plant growth regulators.},
DOI = {10.32604/phyton.2024.058083}
}