Application of exogenous ACC in delaying flowering time and increasing flowering number of citrus

By treating citrus plants with the ethylene synthesis precursor ACC and the inhibitor AVG, the flowering time was delayed and the number of flowers was increased, thus addressing the impact of extreme weather on citrus yield and quality and achieving higher flowering efficiency and fruit set rate.

CN116998347BActive Publication Date: 2025-12-19HUAZHONG AGRI UNIV
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Patent Information

Application Number
CN202310608917.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-24
Publication Date
2025-12-19
Estimated Expiration
2043-05-24

AI Technical Summary

Technical Problem

In existing technologies, the flowering time and quantity of citrus trees are severely affected by extreme weather, leading to a decline in yield and quality. However, there are no reports on how ethylene affects the flowering time and quantity of large citrus trees.

Method used

Citrus plants were treated with ethylene synthesis precursor ACC and ethylene inhibitor AVG. Exogenous ACC was sprayed on the whole plant before flower bud differentiation in autumn, once every 12-16 days, for a total of 5-7 times, at a concentration of 150-250 μM. It contains Tween, which delays flowering time and increases the number of flowers.

Benefits of technology

It delays the flowering time of citrus by 3.19 days, increases the number of flowers by about 26.71%, improves the fruit set rate by 11.84%, enhances flowering efficiency, and improves the yield and quality of citrus under extreme weather conditions.

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Abstract

The application relates to the field of citrus planting technology, in particular to application of exogenous ACC in delaying flowering time of citrus and increasing flowering quantity, and more particularly to a method for delaying flowering time of citrus, increasing flowering quantity, flower formation rate and fruit setting rate, which comprises the following steps: first time spraying exogenous ethylene synthesis precursor ACC on the whole plant before autumn flower bud differentiation of the citrus, and then spraying once every 12-16 days, and spraying for 5-7 times in total. The method can delay the flowering time of the citrus by 3.19 days, and the flowering quantity, flower formation efficiency and fruit setting rate are all improved, thereby providing technical support for solving the influence of extreme weather such as late spring cold on the yield and quality of the citrus.
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