Germination Functional Traits in Seeds of Halophytes

Seal, Charlotte E.; Dantas, B. F.

doi:10.1007/978-3-030-17854-3_50-1

Handbook of Halophytes 2020

DOI: 10.1007/978-3-030-17854-3_50-1

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Germination Functional Traits in Seeds of Halophytes

Charlotte E. Seal¹,

B. F. Dantas²

Abstract: Many families of halophytes rely on seeds for their natural regeneration. As a functional trait, germination is highly responsive to the environment including salinity. For some halophyte species, their seeds may avoid periods of high salinity through dormancy, which may be present in only one seed morph in species with heteromorphic seeds, and can be influenced by the maternal environment and transgenerational effects. Avoidance strategies are plastic and can

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2022

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Seed priming to optimize germination in Arthrocnemum Moq.

Ramírez

Chaâbene²,

Hernández‐Apaolaza³

et al. 2022

BMC Plant Biol

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Background Seed germination and seedling growth constitute the first stage of a plant's life cycle for crop establishment. Arthrocnemum Moq. is a halophyte of the subfamily Salicornioideae (Amaranthaceae), which could be recognized in the foreseeable future as an emerging candidate in applied biosaline agricultural programs, mainly due to the large biomass it represents in coastal and inland saltmarshes, in addition to its interesting nutritional and pharmacological properties. However, to ensure their subsequent use as a crop, it is necessary to optimize their germination through appropriate seed priming treatments. The main goal of this work was to seek the optimization of Arthrocnemum germination process using different pretreatments: exposure to sodium chloride (100 to 1200 mM) in the dark and its subsequent transferred to distilled water separately and together with the combination of pH (5, 7, 9), salinity (0, 100, 200 mM NaCl), and iron conditions (0, 200, 400 µM FeSO4). The experiments were tested on six samples of two different species: A. meridionale (from Tunisia) and A. macrostachyum (from Spain). Results Salinity priming of seeds for 15 days in darkness improved germination percentages by almost 25% at 600 mM NaCl, in both Tunisian and Spanish species. However, keeping seeds at different salt concentrations for 30 days produced higher improvement percentages at lower concentrations in A. meridionale (100–200 mM NaCl), while in A. macrostachyum the highest improvement percentages were obtained at 600 mM NaCl (percentage improvement of 47%). When the dark time period is reduced to 5 days at higher salt concentrations, the greater germination percentages were reached in all the samples at the concentration of 800 mM NaCl, increasing the improvement of germination between 17 and 50%. Finally, the conditions of pH = 7, pretreatment in darkness at 800 mM NaCl and 400 µM or iron, turned out to be an effective medium for seed germination. Conclusions Therefore, before using Arthrocnemum seeds in applied biotechnological programs, a seed priming treatment based on prior exposure to high salt concentrations (600–1000 mM NaCl) is recommended in order to maximize germination percentages.

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Seed priming to optimize germination in Arthrocnemum Moq.

Ramírez

Chaâbene²,

Hernández‐Apaolaza³

et al. 2022

BMC Plant Biol

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show abstract

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Germination Functional Traits in Seeds of Halophytes

Cited by 1 publication

References 50 publications

Seed priming to optimize germination in Arthrocnemum Moq.

Seed priming to optimize germination in Arthrocnemum Moq.

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