Carbon dioxide action on ethylene biosynthesis of preclimacteric and climacteric pear fruit

Abstract

Ethylene production in pear fruit was studied at 2 degrees C. Several observations showed that the inhibiting effect of CO2 on ethylene production did not operate only via the binding site of the ethylene binding protein. Ethylene production of freshly harvested pears was stimulated by 1-methylcyclopropene (1-MCP), but unaffected or inhibited by CO2 which points to different action sites for both molecules. In climacteric pears, where ethylene production was strongly inhibited by 1-MCP, a range of applied CO2 partial pressures was able to inhibit ethylene production further, to an extent similar to untreated pears. In the case of pears that had been stored for a period of 25 weeks, CO2 only had a clear effect after 1-MCP pretreatment. Respiration measurements showed that the effect of CO2 on ethylene production did not operate via an effect on respiration. Ethylene production models based on measurements of whole pears were used to study CO2 effects. Kinetic parameters derived from the models point to the conversion from ACC to ethylene by ACC oxidase as a possible action site for CO2 inhibition.

Molecular analysis of the improvement in rachis quality by high CO2 levels in table grapes stored at low temperature

“…In this sense, Becatti et al, (2010) observed that 25 high CO 2 applied to detached wine grapes for 3 days at 20 ºC induced ACO and an ACS-like gene expression in skin and pulp. On the other hand, elevated levels of CO 2 can reduce ethylene biosynthesis mainly by inhibiting ACS gene expression and affecting ACO action (de Wild et al, 2003). We observed that in table grapes the regulation of ACS1 and ACO1 gene expression by high CO 2 levels was dependent on the type of tissue.…”

Postharvest Handling Practices and Treatment Methods for Tomato Handlers in Developing Countries: A Mini Review

“…The packaging materials used in MAP allow for diffusion of gases through them until a stable equilibrium is reached between the external gases and those inside the package [62]. The most commonly used MAP materials are polyethylene terephthalate (PET), low density polyethylene (LDP), high density polyethylene (HDP), polyvinyl chloride (PVC), polypropylene [63], polystyrene [64,65], and some chemically modified derivatives [17]. The benefit of using MAP is not only in providing a modified atmosphere to control ripening [66], but also in reducing water loss in stored products [67], reducing mechanical injuries, and enhancing better hygiene which reduces the spread of food-borne diseases [66].…”

Effect of 1-MCP on Boll Development and Subtending Leaves of Cotton (<i>Gossypium hirsutum</i> L.) Plants

“…Research in pears (Pyrus communis L. cv. Conference) also reported a burst of ethylene following 1-MCP treatment [28]. Ethylene promotes the abscission layer formation in the peduncle in cotton plants and thus leads to fruit abortion, and ethylene production plays a primary role in early season square and boll abortion [3]- [6].…”