Influence of temperature and salinity on the germination of Limonium tabernense Erben from Tabernas Desert (Almería, SE Spain)

Fernández, Irina; Luque, Esther Giménez; Mercado, Francisco Gómez; Pedrosa, Wladimiro

doi:10.1016/j.flora.2015.12.001

Cited by 42 publications

(20 citation statements)

References 39 publications

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“…Similarly, Rasool, Hameed, Khan, and Gul () also reported that aggravated inhibitory effects of salinity at sub/supra‐optimal thermoperiods. Similar results were found for the seeds of Atriplex cordobensis (Aiazzi, Carpane, Di Rienzo, & Argüello, ) and Limonium tabernense (Delgado Fernández, Giménez Luque, Gómez Mercado, & Pedrosa, ). Hence, interaction of salinity and temperature appears an important cue for restricting seed germination only after sufficient rains when there is low soil salinity and optimal temperature for successful seedling establishment.…”

Section: Discussionsupporting

confidence: 79%

Perianth and abiotic factors regulate seed germination of Haloxylon stocksii—A cash crop candidate for degraded saline lands

et al. 2019

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Haloxylon stocksii, a common succulent halophyte of saline flats in Pakistan and adjacent countries, is utilized as forage, washing soda, and medicines by the local people. In addition, its cultivation can also prevent land degradation by erosion and salinity. Given that information about its seed ecology is limited, this study aimed to unveil the germination requirements of H. stocksii seeds. Seed morpho‐physical features and effects of perianth persistence, salinity (0–500‐mM NaCl), photoperiod (12 hr light/12 hr dark and 24 hr dark), thermoperiod (10/20°C, 15/25°C, 20/30°C, and 25/35°C), and osmotic stress (0 to −4.29 MPa) on germination and recovery were studied. Presence of perianth caused reductions both in imbibition and germination compared to seeds with perianth removed. Seeds germinated optimally under moderate (20/30°C) than lower (10/20°C and 15/25°C) and higher (25/35°C) temperatures. Under 24 hr dark seed germination was ~20% lower than that in 12‐hr photoperiod at 20/30°C and in distilled water. NaCl increment decreased germination, and only ~20% seeds germinated in the highest NaCl concentration. Ungerminated seeds, when shifted from salt solution to distilled water, showed high recovery of germination. Polyethylene glycol treatment also reduced germination, which was comparable with NaCl treatments. However, polyethylene glycol‐treated seeds showed low recovery, unlike NaCl‐treated seeds. Our data unveil that seeds of H. stocksii germinate optimally upon removal of perianth, under moderate temperature, in absence of salinity and/or osmotic stresses. This study thus provides essential baseline information for mass‐scale cultivation and conservation of H. stocksii in degraded arid‐saline areas.

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Section: Discussionsupporting

confidence: 79%

Perianth and abiotic factors regulate seed germination of Haloxylon stocksii—A cash crop candidate for degraded saline lands

et al. 2019

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“…Seed germination and seedling establishment are critical phases in the life cycle of halophytes [45] and a reduction of the salinity in the superficial soil layers, to allow germination, is a prerequisite for their survival in salt marshes. The concentration of 200 mM NaCl drastically affects or, in combination with high temperatures, is even the salinity limit allowing germination for several Iberian Limonium endemics [46][47][48]. On the contrary, in other species of this genus seeds still maintain their germination ability at higher salt concentrations [49][50][51], as in other halophytes [52][53][54][55].…”

Section: Relative Salt Tolerance Of Limonium Albuferae and L Dufouriimentioning

confidence: 99%

Insights on Salt Tolerance of Two Endemic Limonium Species from Spain

et al. 2019

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We have analysed the salt tolerance of two endemic halophytes of the genus Limonium, with high conservation value. In the present study, seed germination and growth parameters as well as different biomarkers—photosynthetic pigments, mono and divalent ion contents—associated to salt stress were evaluated in response to high levels of NaCl. The study was completed with an untargeted metabolomics analysis of the primary compounds including carbohydrates, phosphoric and organic acids, and amino acids, identified by using a gas chromatography and mass spectrometry platform. Limonium albuferae proved to be more salt-tolerant than L. doufourii, both at the germination stage and during vegetative growth. The degradation of photosynthetic pigments and the increase of Na+/K+ ratio under salt stress were more accentuated in the less tolerant second species. The metabolomics analysis unravelled several differences between the two species. The higher salt tolerance of L. albuferae may rely on its specific accumulation of fructose and glucose under high salinity conditions, the first considered as a major osmolyte in this genus. In addition, L. albuferae showed steady levels of citric and malic acids, whereas the glutamate family pathway was strongly activated under stress in both species, leading to the accumulation of proline (Pro) and γ-aminobutyric acid (GABA).

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“…Salinity can affect germination kinetics, delaying and slowing down the germination process, already at low concentration (100 mM;Delgado Fernández et al 2016;Manzoor et al 2017;Muñoz-Rodríguez et al 2017;Santo et al 2017). Germination usually decreases as salinity increases (Baskin and Baskin 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Salinity can also inhibit and suppress germination, although the intensity of the effect varies across species. Germination can be totally suppressed at higher NaCl concentrations (300-400 mM; Atia et al 2011;Santo et al 2014;Delgado Fernández et al 2016), but saltmarsh halophytes can germinate up to NaCl 600 mM or 1 M (Gul et al 2013;Muñoz-Rodríguez et al 2017). As far as seed viability is concerned, contrasting effects have been observed.…”

Section: Introductionmentioning

confidence: 99%

Germination responses of Mediterranean populations of Cakile maritima to light, salinity and temperature

et al. 2018

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Influence of temperature and salinity on the germination of Limonium tabernense Erben from Tabernas Desert (Almería, SE Spain)

Cited by 42 publications

References 39 publications

Perianth and abiotic factors regulate seed germination of Haloxylon stocksii—A cash crop candidate for degraded saline lands

Perianth and abiotic factors regulate seed germination of Haloxylon stocksii—A cash crop candidate for degraded saline lands

Insights on Salt Tolerance of Two Endemic Limonium Species from Spain

Germination responses of Mediterranean populations of Cakile maritima to light, salinity and temperature

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