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The Accumulation and Conversion of Non-Structural Carbohydrate in Branches and Leaves at Different Phenological Stages Determine the Fruit Yield of Xanthoceras sorbifolium Bunge
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The Accumulation and Conversion of Non-Structural Carbohydrate in Branches and Leaves at Different Phenological Stages Determine the Fruit Yield of Xanthoceras sorbifolium Bunge
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Journal Article
The Accumulation and Conversion of Non-Structural Carbohydrate in Branches and Leaves at Different Phenological Stages Determine the Fruit Yield of Xanthoceras sorbifolium Bunge
2024
Overview
Xanthoceras sorbifolium
Bunge (XSB) is one of the most promising trees for sustainable development, the low fruit yield of which, however, has become a restriction in the fruit product industrialization. The contents of soluble sugar and starch in leaves, two-year-old leaf branch (TYLB), current-leaf branch (CLBr) and flowering branch (FlBr) and the relationship among those carbohydrates and fruit yields were measured to evaluate whether the demand of XSB fruit growth and carbohydrate supplement were synchronized. The contents of soluble sugar and starch in TYLB decreased from germination to leafing stage. The obvious fluctuation of the carbohydrates in the four plant organs were exhibited at flowering stage with the maximal soluble sugar content of 226.93 mg g
−1
in leaf and maximal starch content of 82.23 mg g
−1
in TYLB. The soluble sugar in FlBr and leaf decreased after fruit ripening, while the content in CLBr increased at that period. The starch contents in TYLB at leafing and fruit formation stages and FlBr at flowering stage exhibited the first three high positive coefficients to the large fruit yield. While the starch contents in leaf, CLBr and TYLB at leafing, flowering and fruit formation stages exhibited the first three high positive coefficients to the middle fruit yield. The results indicated that the shortage of carbohydrate to the fruit cluster at the flowering and fruitlet developing stages resulted in the fruitlet abscission. This study indicates that the loading capacity of nutrients in vegetative organs at the critical period of fruit development should be considered first to ensure the yield target of XSB fruit in the future.
