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Analysis on the Mechanism of Nectarine Fruit-Cracking
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Analysis on the Mechanism of Nectarine Fruit-Cracking
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Journal Article
Analysis on the Mechanism of Nectarine Fruit-Cracking
2024
Overview
To explore the fruit-cracking mechanism in nectarine, we compared three cracking-susceptible nectarine varieties (‘Huaguang’, ‘Yanguang’, and ‘Zaohongzhu’) and one cracking-resistant nectarine variety (‘Shuguang’). Our findings indicate that ‘Shuguang’ nectarines exhibited significantly higher levels of calcium, calcium pectinate, total pectin, cellulose, Na
2
CO
3
-soluble pectin and CDTA-soluble pectin in the peel compared to ‘Huaguang’, ‘Yanguang’, and ‘Zaohongzhu’. In contrast, the activities of polygalacturonases, pectinesterases, β-galactosidases, and cellulase were significantly lower in ‘Shuguang’. Interestingly, no significant differences were observed in indole-3-acetic acid and gibberellic acid content between ‘Shuguang’ and the other three cracking-susceptible nectarine varieties. However, the abscisic acid content in ‘Shuguang’ was significantly lower. Additionally, compared with the three cracking-susceptible nectarine varieties, the expression level of
PpPIP1
(encoding the plasma membrane intrinsic protein, which can improve the permeability of plant cell membranes and greatly improve the efficiency of water diffusion across membranes) in flesh was significantly lower, and the expression levels of
PpExp1
and
PpExp2
(encoding expansins, which play significant roles in loosening and expanding cell wall components) were significantly higher in the peels of cracking-resistant nectarine varieties. These differences can provide a basis for further study of the mechanism of nectarine fruit-cracking.
