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佛手幼果发育过程中，蛋白质含量随幼果发育略有提高，开花后第５～２５天由５．６４１ｍｇ／ｇ鲜重增至８．０７６ｍｇ／ｇ鲜重。吲哚乙酸含量在开花后第５～１０天由４３．３７μｇ／ｇ干重升至７４．４０μｇ／ｇ干重，然后急剧下降，至开花后第２５天降至１３．５０μｇ／ｇ干重。吲哚乙酸氧化酶活性显示，在开花后第１０～２５天由２．７２μｇ／ｈ·ｍｌ酶液升至１１．１７μｇ／ｈ·ｍｌ酶液。佛手幼果发育过程中，吲哚乙酸氧化酶活性升高，引起吲哚乙酸含量下降，蛋白质等养分积累减少，可能是佛手早期落果的生理原因之一。
During the development of bergamot young fruit, the protein content increased slightly with the young fruit development, and increased from 5.641mg / g fresh weight to 8.076mg / g fresh weight on the 5th to 25th days after flowering. Indoleacetic acid content increased from 43.37μg / g dry weight to 74.40μg / g dry weight on the 5th to 10th day after anthesis, then decreased sharply to 13.50μg / g dry weight on the 25th day after anthesis. The activity of indoleacetic acid oxidase showed that it increased from 2.72μg / h · ml enzyme solution to 11.17μg / h · ml enzyme solution on the 10th to 25th day after flowering. During the development of bergamot young fruit, the activity of indoleacetic acid oxidase increased, which led to the decrease of indoleacetic acid content and the decrease of protein and other nutrient accumulation, which may be one of the physiological reasons for the early fall of bergamot.