Wu Wei, Bao Zhe-Yang, Xiong Ceng-Xi, Shi Li-Yu, Chen Wei, Yin Xue-Ren, Yang Zhen-Feng
Zhejiang Key Laboratory of Intelligent Food Logistic and Processing, College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang 315100, China.
Department of Analytical Chemistry and Food Science, Instituto de Agroecoloxía e Alimentación (IAA)-CITEXVI, Universidade de Vigo, Vigo 36310, Spain.
J Agric Food Chem. 2025 Jan 15;73(2):1159-1166. doi: 10.1021/acs.jafc.4c09045. Epub 2024 Dec 24.
Texture is an important quality index reflecting a series of sensory evaluations of fruit, and softening is the main texture change of most postharvest fruit. Persimmon fruit () shows a pattern of decreasing firmness after harvest, leading to a short duration of sale and excessive waste. We found that the treatment with gibberellin (GA) could effectively inhibit the postharvest softening of persimmon fruit, but the underlying mechanism is unclear. In the GA signal transduction pathway, DELLA protein is the key component and is involved in many growth and development processes regulated by GA, while whether DELLA is involved in GA-regulated fruit ripening is not yet known. In this research, two DELLA genes DkDELLA1/2 were found to enhance the transactivation effect of DkNAC9 on the promoter, thus participating in persimmon fruit softening regulated by GA. The results may provide new findings for the regulatory network of GA and the DELLA protein family.
质地是反映果实一系列感官评价的重要品质指标，而软化是大多数采后果实主要的质地变化。柿果（）采后表现出硬度下降的趋势，导致销售期短且浪费严重。我们发现用赤霉素（GA）处理可有效抑制柿果采后软化，但其潜在机制尚不清楚。在GA信号转导途径中，DELLA蛋白是关键组分，参与许多由GA调控的生长发育过程，而DELLA是否参与GA调控的果实成熟尚不清楚。在本研究中，发现两个DELLA基因DkDELLA1/2增强了DkNAC9对 启动子的反式激活作用，从而参与GA调控的柿果软化过程。这些结果可能为GA与DELLA蛋白家族的调控网络提供新的发现。
