Chapter 8

Role of Ethylene in Flower and Fruit Development

Cecilia Martínez

Cecilia Martínez

Departamento de Biología y Geología, Research Center CIAIMBITAL and Agrifood Campus of International Excellence CeiA3, University of Almería, La Cañada de San Urbano s/n, Almería, Spain

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Alicia García

Alicia García

Departamento de Biología y Geología, Research Center CIAIMBITAL and Agrifood Campus of International Excellence CeiA3, University of Almería, La Cañada de San Urbano s/n, Almería, Spain

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Manuel Jamilena

Manuel Jamilena

Departamento de Biología y Geología, Research Center CIAIMBITAL and Agrifood Campus of International Excellence CeiA3, University of Almería, La Cañada de San Urbano s/n, Almería, Spain

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First published: 26 August 2022
Citations: 1

Summary

Ethylene is a plant phytohormone that regulates multiple aspects of plant growth and development. In this chapter, we review the involvement of this essential hormone in different valuable agronomic traits during reproductive development. Ethylene controls the transition between vegetative and reproductive stages of development in some plant species and has an essential role in the female flowering transition of monoecious cucurbits. During flower development, ethylene modulates the growth and maturation of sexual organs and petals up to anthesis. Transcriptomic analyses, ethylene mutants, and the external application of ethylene promoters and inhibitors have demonstrated that ethylene regulates stamen filament elongation, anther and pollen development and maturation, pistil and ovule formation and maturation, and the expansion, senescence, and abscission of petals. Recently it has been demonstrated that the successful pollination and fertilization events that trigger fruit set and early fruit development in species like tomato and zucchini are also dependent on reduced production of ethylene in flowers and that in the absence of pollination and parthenocarpy, a burst of ethylene is induced that participates in the abortion and senescence of the ovary. One of the most remarkable roles of ethylene in flower and fruit development has been thoroughly studied in the monoecious species of the Cucurbitaceae family, where ethylene biosynthesis and perception genes have been discovered that are responsible for sex determination. The chapter also underlines the importance of these discoveries in improving the reproduction and performance of different crop species.

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