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Seed Germination Strategies of Mediterranean Halophytes Under Saline Condition

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Handbook of Halophytes

Abstract

The study of the ecological strategies adopted by seed plants to ensure their success in different environments is closely related to germination ecology. This implies a careful knowledge of ecophysiology of seeds and, therefore, also of interaction between plants and the complexity of external factors. In particular, the environmental conditions of the area where a plant grows and produces seeds represent the main factors that influence successful seedling establishment. The physical-chemical features of habitats, and therefore their heterogeneity, affect the behavior of seeds in different ways. In addition to the timing of seed production, they can induce or terminate dormancy and/or germination and influence the germination pattern of different seeds in the same plant and so the composition and dispersal of soil seed banks. Salinity is a major abiotic stress affecting growth and plant productivity worldwide, constituting one of the main topics of study in the field of plant physiology. Halophytes are the plants that have the availability to survive and develop in different types of saline habitats. In this chapter, we consider some examples to illustrate the main adaptive strategies used by the seeds of halophytes on ecophysiological perspectives to survive in habitats affected by high levels of salinity. The focus is on the species that live in the brackish or salt coastal areas of the Medit erranean Basin. On these environments, the salt stress may act synergistically with intense anthropic pressure, generating profound alterations in the ecosystem and threatening the survival of the plant species very sensitive to the effects of climate change also. The results show the main diverse strategies, such as dormancy cycling, seed heteromorphism, and recovery capacity, from saline shock, favoring the chances of seed survival. The interaction between temperature and salinity during germination was also discussed assessing its crucial role as an ecological strategy.

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Authors and Affiliations

  1. Department of Agriculture, Food and Environment (DAFE), University of Pisa, Pisa, Italy

    Tiziana Lombardi & Stefano Bedini

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  1. Tiziana Lombardi
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  2. Stefano Bedini
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Correspondence to Tiziana Lombardi .

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Editors and Affiliations

  1. Faculty of Biology, Alexandru Ioan Cuza University, Iasi, Romania

    Marius-Nicusor Grigore

Section Editor information

  1. Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi, Pakistan

    Bilquees Gul

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Lombardi, T., Bedini, S. (2020). Seed Germination Strategies of Mediterranean Halophytes Under Saline Condition. In: Grigore, MN. (eds) Handbook of Halophytes. Springer, Cham. https://doi.org/10.1007/978-3-030-17854-3_119-1

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  • DOI: https://doi.org/10.1007/978-3-030-17854-3_119-1

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  • Print ISBN: 978-3-030-17854-3

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