Ding Xiaoyi, Wang Bin, Gong Yubo, Yan Xueqing, Chen Xinxin, Zhong Yuanwen, Zhao Zhengyang
State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Xianyang 712100, China.
Foods. 2024 May 21;13(11):1594. doi: 10.3390/foods13111594.
'Ruixue' apples were used as the test material to study the effect of 10 μM methyl jasmonate (MeJA) on the quality and cell wall metabolism of apples after 18 d of storage. The results showed that MeJA significantly decreased the respiratory rate, reduced the titratable acid content and maintained a high soluble solids content. MeJA has been shown to suppress the activities and gene expressions of WSP, CSP, ISP, and cellulose in contrast to the control group, thereby maintaining a lower cell permeability and higher exocarp firmness. MeJA significantly decreased the expression of , , , , and genes in the apple exocarp when compared to the control group. In addition, the overexpression of increased the content of cell wall polysaccharides such as WSP and CSP, enhanced cell wall-degrading enzyme activities, and accelerated fruit ripening and softening, whereas silencing did the opposite. Together, these results demonstrate that exogenous MeJA maintains the Ruixue apple fruit quality by regulating the metabolism of cell wall substances.
以“瑞雪”苹果为试验材料，研究10 μM茉莉酸甲酯（MeJA）对贮藏18 d后苹果品质和细胞壁代谢的影响。结果表明，MeJA显著降低了呼吸速率，降低了可滴定酸含量，并维持了较高的可溶性固形物含量。与对照组相比，MeJA已被证明可抑制WSP、CSP、ISP和纤维素的活性及基因表达，从而保持较低的细胞通透性和较高的外果皮硬度。与对照组相比，MeJA显著降低了苹果外果皮中 、 、 、 和 基因的表达。此外， 的过表达增加了WSP和CSP等细胞壁多糖的含量，增强了细胞壁降解酶的活性，并加速了果实成熟和软化，而沉默 则产生相反的效果。总之，这些结果表明外源MeJA通过调节细胞壁物质的代谢来维持瑞雪苹果果实的品质。
