期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 21, 页码 -出版社
MDPI
DOI: 10.3390/ijms232113304
关键词
table grapes; gaseous treatments; low temperature; rachis quality; gene expression
资金
- CICYT projects [AGL2017-85291-R, PID2020-113965RB-I00/AEI/10.13039/501100011033]
Short-term gaseous treatments can improve rachis quality during table grape postharvest by reducing oxidative stress and cell wall degradation. This improvement is achieved through the modulation of the non-enzymatic and enzymatic antioxidant systems, as well as the expression of ethylene and ABA regulatory genes. This study provides new insights into the mechanisms underlying the beneficial effects of gaseous treatments on rachis browning.
Short-term gaseous treatments improve rachis quality during table grape postharvest, but little is known about the mechanisms involved. In this work, we observed that the application of a 3-day CO2 treatment at 0 degrees C improved rachis browning of Superior Seedless and Red Globe bunches, affecting the non-enzymatic antioxidant system by reducing the total phenolic content, the antioxidant activity and the expression of different stilbene synthase genes. Lipid peroxidation levels revealed lower oxidative stress in CO2-treated rachis of both cultivars linked to the activation of the enzymatic antioxidant system. Furthermore, whereas a positive correlation was denoted between rachis browning and the accumulation of key ABA regulatory genes in Red Globe bunches, this effect was restricted to ACS1, a key synthetic ethylene gene, in Superior Seedless clusters. This work also corroborated the important role of ethylene-responsive factors in the beneficial effect of the gaseous treatment, not only in the berries but also in the rachis. Finally, the application of the gaseous treatment avoided the induction of cell wall-degrading enzyme-related genes in both cultivars, which could favor the maintenance of rachis quality. This work provides new insight into specific responses modulated by the gaseous treatment focused on mitigating rachis browning independently of the cultivar.
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