Catálogo de publicaciones - libros

Ethylene is involved in the regulation of many physiological responses throughout plant development. In × “Mitchell Diploid” (MD), a rapid increase in endogenous ethylene is synthesized in the ovary coinciding with fertilization, and signaling a change in floral function from one of pollinator attraction to one of seed development. Following treatment of petunia flowers with exogenous ethylene, 76% of human olfactory panelists correctly identify a difference in floral aroma when compared to the control (air treatment).

Xylem is the plant vascular tissue responsible for raw sap conduction. It comprises two main types of cells that are derived from differentiating cambium: tracheary elements (TEs) and fibres that have conducting and mechanical role, respectively. Xylem formation is a developmental process and is under strict hormonal control involving a stew of phytohormones including auxin, cytokinin and ethylene.

The work was conducted with the aim to improve the quality of propagated shoots of the medicinal species L.

In this study, we show the capacity of de novo shoot organogenesis from cotyledon explants of bottle gourd in vitro in relation to ethylene, ethylene inhibitor, phytohormones and growth supplements. The physiological relevance of the hormonal interaction with respect to regulation of ethylene initiation and effect on regeneration is discussed.

Species of the monoecious family change sex determination of flowers when levels of ethylene change. Thus, the exogenous application of ethylene releasing agents such as ethephon inhibits the production of staminate flowers and increases the number of pistillate flowers in squash, being therefore used in the commercial production of hybrid seed (Rudich ., 1970).

Plant hormones, including the gaseous plant hormone ethylene, are important regulators of wood formation both due to environmental cues and in determining growth patterns. However, little is known about the role of ethylene in these processes at molecular level. Thus, sequencing of the black cottonwood () genome facilities a great tool for such research.

Some vineyards from ‘Rueda’ area (Spain) tends to develop an excessive vegetative growth which often leads to massive shading. The resulting shade favours long growth periods, early fruit ripening and fruit size and can reduce flower differentiation for the following year. Grape composition might be negatively affected by shading as a result of an unfavourable light microclimate in leaves and clusters (Smart, 1987).

1-methylcyclopropene (1-MCP), an ethylene antagonist, is an effective device to improve the shelf life and quality of fruits, vegetables and ornamentals. It also represents an useful tool in studies aimed at clarifying the ethylene physiology in plants. Peaches and nectarines are climacteric fruits which exhibit a sharp rise in ethylene synthesis at the onset of ripening associated with changes in colour, texture, aroma and other biochemical features.

Ethylene plays a role in many developmental processes among which fruit ripening has practical importance to the human diet. Peach is a climacteric fruit whose ripening, characterized by increased ethylene production, is accompanied by dramatic changes in colour, flavour, aroma and flesh texture.

Physiological and molecular evidence supported the autocatalytic ethylene production in young “Star Ruby” grapefruit and “Murcott” mandarins, and the autoinhibitory ethylene production in mature fruit. Ethylene upregulated expression of pyruvate decarboxylase () and alcohol dehydrogenase () in both fruitlets and mature “Star Ruby”, and increased acetaldehyde (AA) and ethanol production, while ethylene action inhibitors counteracted the effect. N2 not only changed the expression of genes for ethylene biosynthesis but also genes for ethylene perception in both young and mature fruits.