Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús (IIB-INTECH; CONICET-UNSAM), B7130IWA Chascomús, Argentina.
J Sci Food Agric. 2010 Mar 15;90(4):683-9. doi: 10.1002/jsfa.3868.
Strawberry is a soft fruit, considered as non-climacteric, being auxins the main hormones that regulate the ripening process. The role of ethylene in strawberry ripening is currently unclear and several studies have considered a revision of the possible role of this hormone.
Strawberry fruit were harvested at the white stage and treated with ethephon, an ethylene-releasing reagent, or 1-methylcyclopropene (1-MCP), a competitive inhibitor of ethylene action. The effects of the treatments on fruit quality parameters and on the activity of enzymes related to anthocyanin synthesis and cell wall degradation were evaluated. Some aspects of ripening were accelerated (anthocyanin accumulation, total sugar content and increment of phenylalanine ammonia-lyase (PAL; EC 4.3.1.24) and beta-galactosidase (EC 3.2.1.23) activities), while others were repressed (chlorophyll levels and increment of endo-1,4-beta-glucanase (EC 3.2.1.4) and beta-xylosidase (EC 3.2.1.37) activities) or unchanged (reducing sugar content, pH, titratable acidity and alpha-L-arabinofuranosidase (EC 3.2.1.55) activity) by ethylene. 1-MCP treatment caused the opposite effect. However, its effects were more pronounced, particularly in anthocyanin accumulation, phenolics, PAL and polygalacturonase (EC 3.2.1.15 and EC 3.2.1.67) activities.
These observations probably indicate that strawberry produces low levels of ethylene that are sufficient to regulate some ripening aspects.
草莓是一种柔软的水果，被认为是非跃变型的，其主要激素是生长素，调节其成熟过程。乙烯在草莓成熟过程中的作用目前尚不清楚，一些研究已经考虑对这种激素的可能作用进行修正。
草莓果实在白熟期收获，并分别用乙烯释放剂乙烯利或 1-甲基环丙烯（1-MCP）处理，1-MCP 是乙烯作用的竞争性抑制剂。评估处理对果实品质参数以及与花色素合成和细胞壁降解相关的酶活性的影响。一些成熟方面得到了加速（花色素积累、总糖含量以及苯丙氨酸解氨酶（PAL；EC 4.3.1.24）和β-半乳糖苷酶（EC 3.2.1.23）活性的增加），而其他方面则受到抑制（叶绿素水平和内-1,4-β-葡聚糖酶（EC 3.2.1.4）和β-木糖苷酶（EC 3.2.1.37）活性的增加）或不变（还原糖含量、pH 值、可滴定酸度和α-L-阿拉伯呋喃糖苷酶（EC 3.2.1.55）活性）由乙烯。1-MCP 处理产生相反的效果。然而，其效果更为显著，特别是在花色素积累、酚类物质、PAL 和多聚半乳糖醛酸酶（EC 3.2.1.15 和 EC 3.2.1.67）活性方面。
这些观察结果可能表明，草莓产生的乙烯水平较低，但足以调节一些成熟方面。
