Factors influencing seed dormancy in Spergularia media (L.) C. Presl.

Ungar, Irwin A.; Binet, P

doi:10.1016/0304-3770(75)90006-6

Cited by 28 publications

(5 citation statements)

References 18 publications

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“…The reduction in cytokinin content and low gibberellin-like concentrations in response to NaCl treatments, implies that hormonal equilihrium must play an important physiological role in the germination of seeds of these halophytic taxa in the genus Suaeda. Ungar and Binet (1975) has also found tbat gibberellic acid will stimulate germination under conditions of osmotic stress in the halophyte Spergularia media; but as in the current study kinetin was not promotive. The increased capacity to germinate for dormant species of Suaeda treated with gibberellic acid and NaCl demonstrates that the hormone can stimulate the embryo to grow and overcome the mechanical resistance of the testa.…”

Section: Discussioncontrasting

confidence: 48%

Hormonal Control of Germination under Saline Conditions of Three Halophytic Taxa in the Genus Suaeda

Boucaud

Ungar

1976

Physiologia Plantarum

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The interaction between hormones and salinity on seed germination of three halophytic taxa in the genus Suaeda: S, maritima (L.) Dum. var. flexilis Focke and var. macrocarpa Moq., and S. depressa (Pursh) Wats, was studied. Exogenous applications of kinetin and gibberellic acid (GA3) were applied in order to determine if either of these growth-promoting hormones would promote germination in the two dormant taxa, Suaeda depressa and S. maritima var. flexilis and to see if osmotically induced dormancy by NaCl could be alleviated. Our results indicate that gibberellic acid is capable of breaking dormancy in these species with dormant seeds, but kinetin proved to be ineffective. A seed dormancy that was induced by osmotic stress could also be alleviated by treatments with gibberellic acid. Endogenous concentrations of both cytokinins and gibberellins were measured in seeds exposed to osmotic stress (0.85 M NaCl), and we found a reduction in cytokinin activity in these three taxa. Gibberellinlike activity was reduced in S, depressa when seeds were soaked in 0.85 Af NaCl.

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Section: Discussioncontrasting

confidence: 48%

Hormonal Control of Germination under Saline Conditions of Three Halophytic Taxa in the Genus Suaeda

Boucaud

Ungar

1976

Physiologia Plantarum

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“…The success of our model species along the roads can also be increased by their high degree of salt tolerance, which was also demonstrated by our germination experiment. In consistent with our experiment, other studies have also been documented the negative effect of NaCl on germination rates in case of Spergularia media 93 and Puccinellia distans 94 . Soils with a soluble salt content of 0.25–0.50% can already be classified as highly saline, where only few halophytes can survive 95 .…”

Section: Discussionsupporting

confidence: 93%

Road traffic and landscape characteristics predict the occurrence of native halophytes on roadside verges

Fekete

Bak

Vincze

et al. 2022

Sci Rep

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Road management practices, such as winter de-icing create ideal habitats and competitive advantage for salt-tolerant species. We aimed to map the occurrences of halophytes along roads in Hungary. Furthermore, we tested factors that might play a role in the roadside occurrences of five chosen native halophytes from rare to common, we encountered during our field surveys. These were Festuca pseudovina, Limonium gmelinii subsp. hungaricum, Podospermum canum, Puccinellia distans and Spergularia media. We found, that at least one halophyte species was documented in 71% of the total sampling points. Germination experiments indicated that substrate salt concentration significantly decreased germination rates in each of the five species, but in case of L. gmelinii subsp. hungaricum, or P. distans germination occurred on extremely high salt concentrations. Traffic intensity, the presence of other halophytes at the sampling point and the presence of a given species in the surrounding landscape had a significant positive effect on the occurrence of four of the five model species. Our results suggest that the studied species are mostly in the early stage of their roadside spread, colonizing roadsides close to their native distribution ranges. The possibility of a future range expansion along roads cannot be excluded.

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“…Ungar and Binet (1975) reported that the germination percentage of seeds of the coastal halophyte Spergularia media (Caryophyllaceae) cold stratified for 10 days was higher in light than that in darkness, whereas seeds stratified for 30 days germinated equally well in light and in darkness. Likewise, cold stratification also changed the light requirement for germination of K. caspicum seeds.…”

Section: Discussionmentioning

confidence: 97%

Effects of cold stratification, temperature, light and salinity on seed germination and radicle growth of the desert halophyte shrub, Kalidium caspicum (Chenopodiaceae)

Baskin

Wang

et al. 2007

Plant Growth Regul

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Factors influencing seed dormancy in Spergularia media (L.) C. Presl.

Cited by 28 publications

References 18 publications

Hormonal Control of Germination under Saline Conditions of Three Halophytic Taxa in the Genus Suaeda

Hormonal Control of Germination under Saline Conditions of Three Halophytic Taxa in the Genus Suaeda

Road traffic and landscape characteristics predict the occurrence of native halophytes on roadside verges

Effects of cold stratification, temperature, light and salinity on seed germination and radicle growth of the desert halophyte shrub, Kalidium caspicum (Chenopodiaceae)

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