Immature fruits perform photosynthesis
Multiple botanical and physiological studies confirm that immature, green fruits contain functional chloroplasts and carry out photosynthesis to support their growth and metabolite accumulation.
The retrieved papers consistently demonstrate that immature fruits contain chlorophyll, develop functional chloroplasts, and actively perform photosynthesis during their early developmental stages.
Lan-huan Meng, Zhong-qi Fan, Qiang Zhang, Cuicui Wang, Ying Gao, Yikang Deng, B. Zhu, Hongliang Zhu, Jian-ye Chen, W. Shan, Xue‐ren Yin, S. Zhong, D. Grierson, Cai-Zhong Jiang, Yunbo Luo, D. Fu. BEL1‐LIKE HOMEODOMAIN 11 regulates chloroplast development and chlorophyll synthesis in tomato fruit. 2018. https://doi.org/10.1111/tpj.13924
Discusses chloroplast development and chlorophyll synthesis in unripe tomato fruit.
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A. Garrido, Artur Conde, J. Serôdio, R. D. de Vos, A. Cunha. Fruit Photosynthesis: More to Know about Where, How and Why. 2023. https://doi.org/10.3390/plants12132393
Notes that fruits at early developmental stages contain chlorophyll and exhibit photosynthetic activity.
Ting Jia, Yuting Cheng, I. Khan, Xuan Zhao, Tongyu Gu, Xueyun Hu. Progress on Understanding Transcriptional Regulation of Chloroplast Development in Fleshy Fruit. 2020. https://doi.org/10.3390/ijms21186951
Explains that developing fleshy fruits with functional chloroplasts are capable of photosynthesis.
Hanqian Liu, Mingming Cui, Kaihong Hu, Junyi Tan, Yiqun Weng, Yuxuan Ma, Ju Li, Zeqiang Huang, Birong Chen, Huan-wen Meng, Yupeng Pan, Zhihui Cheng. CsAPRR2 regulates cucumber immature fruit color by coordinating chloroplast biogenesis and photosynthesis-related gene expression.. 2025. https://doi.org/10.1111/tpj.70496
Establishes the regulation of chloroplast biogenesis and photosynthesis-related genes in immature cucumber fruit.
Zhang W, Xie Y, Yuan Y, Long Q, Shao Z, Zheng J, Ru X, Luo J, Pan G, Babalola OO, Deng W. Metabolism and regulation of chlorophyll and carotenoids in tomato fruits.. 2026. https://doi.org/10.1093/hr/uhag084
Highlights that chlorophyll is predominant in early fruit stages and plays a vital role in photosynthesis.
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