Effects of Enhanced UV-B Radiation Exposure on Fruit-ripening, Photosynthesis, and Leaf-microstructure of Guifei Mango

LIN Xiaokai; LIAO Haizhi; YANG Chengkun; DU Jingjia; PENG Junjie; ZHOU Kaibing

doi:10.19303/j.issn.1008-0384.2021.10.010

Volume 36 Issue 10

Oct. 2021

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Article Navigation > Fujian Journal of Agricultural Sciences > 2021 > 36(10): 1187-1193

LIN X K, LIAO H Z, YANG C K, et al. Effects of Enhanced UV-B Radiation Exposure on Fruit-ripening, Photosynthesis, and Leaf-microstructure of Guifei Mango [J]. Fujian Journal of Agricultural Sciences，2021，36（10）：1187−1193 doi: 10.19303/j.issn.1008-0384.2021.10.010

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LIN X K, LIAO H Z, YANG C K, et al. Effects of Enhanced UV-B Radiation Exposure on Fruit-ripening, Photosynthesis, and Leaf-microstructure of Guifei Mango [J]. Fujian Journal of Agricultural Sciences，2021，36（10）：1187−1193 doi: 10.19303/j.issn.1008-0384.2021.10.010

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Effects of Enhanced UV-B Radiation Exposure on Fruit-ripening, Photosynthesis, and Leaf-microstructure of Guifei Mango

doi: 10.19303/j.issn.1008-0384.2021.10.010

College of Horticulture, Hainan University/Engineering Research Center for Breeding of New Varieties of Tropical Crops, Ministry of Education , Haikou, Hainan　570228, China

Received Date: 2021-07-30
Rev Recd Date: 2021-08-21

Available Online: 2021-12-30

Publish Date: 2021-10-28

Abstract

Abstract

Objective Effects of enhanced UV-B radiation exposure on the ripening and quality of fruit as well as the photosynthesis and microstructure of leaves of Guifei mango were studied.【Methods】Mature Guifei mongo trees of 16-year-old were exposed to 96 kJ·m⁻²·d⁻¹ UV-B radiation (Tr) or natural light (CK). Criteria including ripened fruit percentage on a tree and photosynthetic rate (P_n), stomatal conductance (G_s), and microstructure of leaves were evaluated. Result Under Tr, the tree leaves became 2.29 μm thicker, the upper epidermis and palisade tissue 30.35 μm higher, the cell distribution of palisade tissue and spongy tissue denser, the ratio of palisade tissue and spongy tissue 18% higher, the P_n and G_s greater, and the ripened fruit rates 6.77% higher on April 22, 37.83% higher on April 29, and 17.52% higher on May 7 than CK. The soluble sugar, soluble solids, vitamin C, and sugar/acid and solid/acid ratios of the fruits on the first harvest were significantly higher, while the titratable acid content significantly lower, than those of CK. On the other hand, there was no significant effects exerted by Tr on the thickness of upper and lower cuticle or lower epidermis, nor the size and morphology of stoma of the leaves. Conclusion The photosynthesis of mango trees was promoted by the 96 kJ·m⁻²·d⁻¹ enhanced UV-B radiation-induced microstructural alternation on the tissue of mesophyll and G_s increase in the leaves. The effect on fructescence could be applied to regulate Guifei mango maturation and ripening.
- UV-B radiation,
- mango,
- fructescence,
- quality,
- photosynthesis,
- microstructure

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References(36)

References

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