Effects of salinity, temperature, and light on seed germination in two Turkish endemic halophytes, Limonium iconicum and L. lilacinum (Plumbaginaceae)

Yıldız, Mustafa; Cenkci, Süleyman; Kargıoğlu, Mustafa

doi:10.15258/sst.2008.36.3.14

Cited by 16 publications

(7 citation statements)

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“…Different responses have been reported in the genus Limonium, depending on species. L. stocksii, L. iconicum and L. lilacinum showed a similar response to temperature as the four herein studied species, and an optimal response at higher temperatures (Zia and Khan, 2004;Yildiz et al, 2008;Santo et al, 2017), whereas other species like L. cossonianum and L. insigne were more sensitive to increasing temperature (Giménez Luque et al, 2012;Fernández et al, 2015). Tolerance to a wide range of temperatures could allow these four species to germinate during a longer period of the year.…”

Section: Discussionsupporting

confidence: 63%

Assessing Effects of Temperature Change on Four Limonium Species from Threatened Mediterranean Salt-Affected Habitats

Monllor

Soriano

Lull

et al. 2018

Not Bot Horti Agrobo

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Evaluation of tolerance to temperatures in the germination stage is an important tool to foresee the possible effect of global warming. Moreover, establishing germination protocols for endemic and threatened species is most interesting for restoration and management plans that focus on habitat conservation. Seed germination was analysed in four species of the genus Limonium (L. virgatum, L. narbonense, L. girardianum and L. santapolense) growing in two saline habitats on the eastern coast of the Iberian Peninsula. The study aim was to compare responses of seed germination to different temperature regimes. Seeds were collected in two protected areas, 'L´Albufera de Valencia' (province of Valencia) and 'Clot de Galvany' (province of Alicante). Responses to temperature were checked within a constant range, 10-30 °C at 5 °C intervals, by considering the environmental conditions at both sampling sites. The final germination percentage and mean germination time (MGT) were calculated after 30 days. In order to compare thermal responses, base temperature (Tb) and thermal time (S) were determined for each species. The possible correlations of soil parameters with the species´ germination pattern were also analysed. To identify distinct behavioural groups, a non-linear principal component analysis was performed. Significant differences between species were found in the velocity of germination. A fast response as opportunistic germination was observed in all the species. The base temperature and thermal time showed significant differences in competitiveness between species.

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Section: Discussionsupporting

confidence: 63%

Assessing Effects of Temperature Change on Four Limonium Species from Threatened Mediterranean Salt-Affected Habitats

Monllor

Soriano

Lull

et al. 2018

Not Bot Horti Agrobo

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“…Studies on several Mediterranean endemics revealed a complete inhibition of germination by salt concentrations higher than 200 mM NaCl, for example in L. cossonianum (Giménez Luque et al, 2013 ), L. tabernense (Delgado Fernández et al, 2016 ), or L. insigne (Delgado Fernández et al, 2015 ). In two endemics from Turkey, L. iconicum and L. lilacinum , germination was reduced to <20% of the control at 300 mM salt (Yildiz et al, 2008 ). Some Limonium taxa are more tolerant to salt during the seed germination phase, as it is the case for L. stocksii , a species from India and Pakistan in which germination was optimal (and close to 100%) at or below 200 mM NaCl; germination percentages were reduced only by 40% at 300 mM, and some seeds germinated even in the presence of 400 mM NaCl (Zia and Khan, 2004 ).…”

Section: Discussionmentioning

confidence: 99%

Unraveling Salt Tolerance Mechanisms in Halophytes: A Comparative Study on Four Mediterranean Limonium Species with Different Geographic Distribution Patterns

et al. 2017

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We have performed an extensive study on the responses to salt stress in four related Limonium halophytes with different geographic distribution patterns, during seed germination and early vegetative growth. The aims of the work were twofold: to establish the basis for the different chorology of these species, and to identify relevant mechanisms of salt tolerance dependent on the control of ion transport and osmolyte accumulation. Seeds were germinated in vitro, in the presence of increasing NaCl concentrations, and subjected to “recovery of germination” tests; germination percentages and velocity were determined to establish the relative tolerance and competitiveness of the four Limonium taxa. Salt treatments were also applied to young plants, by 1-month irrigation with NaCl up to 800 mM; then, growth parameters, levels of monovalent and divalent ions (in roots and leaves), and leaf contents of photosynthetic pigments and common osmolytes were determined in control and stressed plants of the four species. Seed germination is the most salt-sensitive developmental phase in Limonium. The different germination behavior of the investigated species appears to be responsible for their geographical range size: L. narbonense and L. virgatum, widespread throughout the Mediterranean, are the most tolerant and the most competitive at higher soil salinities; the endemic L. santapolense and L. girardianum are the most sensitive and more competitive only at lower salinities. During early vegetative growth, all taxa showed a strong tolerance to salt stress, although slightly higher in L. virgatum and L. santapolense. Salt tolerance is based on the efficient transport of Na+ and Cl− to the leaves and on the accumulation of fructose and proline for osmotic adjustment. Despite some species-specific quantitative differences, the accumulation patterns of the different ions were similar in all species, not explaining differences in tolerance, except for the apparent activation of K+ transport to the leaves at high external salinity, observed only in the most tolerant L. narbonense and L. virgatum. This specific response may be therefore relevant for salt tolerance in Limonium. The ecological implications of these results, which can contribute to a more efficient management of salt marshes conservation/regeneration programs, are also discussed.

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“…Wagenitz, Yildiz et al . ), focusing in particular on the salt stress tolerance of Limonium seeds. Many Limonium species show a rapid seed germination (>90% after ca.…”

Section: Introductionmentioning

confidence: 99%

Variability on morphological and ecological seed traits of Limonium avei (De Not.) Brullo & Erben (Plumbaginaceae)

Santo

Mattana

Grillo

et al. 2017

Plant Species Biology

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Limonium avei is an annual species occurring in the salt-marshes and in limited surfaces of rocky areas around the Mediterranean coasts. Seed lots from five populations of this species, along a latitudinal gradient, were analyzed using an image analysis system to detect differences in seed morphology among populations. Germination requirements at constant (5-25 C) and alternating temperatures (25/10 C), both in light and in darkness, were evaluated for all populations, as well as the effect of the calyx removal on final seed germination and its rate. Morpho-colorimetric analysis clearly identified seeds from different populations, habitats and substrates without misattributions among them. The calyx slowed the germination process, influencing both final germination and rate with respect to naked seeds. Seeds from all populations germinated with significantly higher percentages in the light, with respect to those incubated in the darkness, and showed rapid germination (time in days to reach 50% of germination: 0.5 days) at the warmer tested temperature (25 C). High germination (>80%) was also detected for seeds of all the investigated populations, except for those from the Apulian region (South Italy, ca. 60%). Our results highlight that L. avei has a high variability in seed morphology, probably habitat induced, and a fast germination response for all populations. Rapid germination may be an adaptive strategy that allows L. avei seeds to take advantage of transient favorable conditions during the germination stage, to ensure seedling establishment under the unpredictable rainfall pattern in the Mediterranean climate.

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Effects of salinity, temperature, and light on seed germination in two Turkish endemic halophytes, Limonium iconicum and L. lilacinum (Plumbaginaceae)

Cited by 16 publications

References 0 publications

Assessing Effects of Temperature Change on Four Limonium Species from Threatened Mediterranean Salt-Affected Habitats

Assessing Effects of Temperature Change on Four Limonium Species from Threatened Mediterranean Salt-Affected Habitats

Unraveling Salt Tolerance Mechanisms in Halophytes: A Comparative Study on Four Mediterranean Limonium Species with Different Geographic Distribution Patterns

Variability on morphological and ecological seed traits of Limonium avei (De Not.) Brullo & Erben (Plumbaginaceae)

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