Biotechnology of Natural Products, Technical University Munich, D-85354 Freising, Germany.
Faculty of Forest Sciences, Universidad de Concepción, Concepción, Chile.
Food Chem. 2021 Oct 1;358:129913. doi: 10.1016/j.foodchem.2021.129913. Epub 2021 Apr 20.
Ethylene seems to play a secondary role in non-climacteric strawberry ripening compared to abscisic acid. However, this does not exclude that ethylene can regulate some specific events related to the ripening process. Preliminary experiments of applications of ethylene or its inhibitor 1-MCP to strawberry fruits have reinforced this hypothesis. Here, we reveal some previously non-covered physiological effects of ethylene using an in vitro strawberry ripening system. Fruits of Fragaria chiloensis treated with ethephon at the large green developmental stage showed inhibition of anthocyanin biosynthesis and downregulation of essential anthocyanin biosynthesis genes during the ripening. At the same time, ethylene stimulated lignin biosynthesis and remarkably upregulated the expression of FcPOD27. Since contrasting results have been reported when ethylene was applied at late ripening developmental stages, our findings support the hypothesis of a temporal-specific ethylene role in the ripening of strawberry fruits.
与脱落酸相比，乙烯在非跃变型草莓成熟过程中似乎扮演次要角色。然而，这并不排除乙烯可以调节与成熟过程相关的某些特定事件。应用乙烯或其抑制剂 1-MCP 于草莓果实的初步实验加强了这一假设。在这里，我们使用体外草莓成熟系统揭示了乙烯的一些先前未被覆盖的生理效应。在大绿发育阶段用乙烯利处理的智利草莓果实表现出花色苷生物合成的抑制和在成熟过程中关键花色苷生物合成基因的下调。同时，乙烯刺激木质素生物合成，并显著上调 FcPOD27 的表达。由于在后期成熟发育阶段应用乙烯时报告了相反的结果，我们的研究结果支持乙烯在草莓果实成熟过程中具有时间特异性作用的假设。
