Halophyte seed germination

Ungar, Irwin A.

doi:10.1007/bf02919080

Cited by 330 publications

(182 citation statements)

References 104 publications

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“…The resuIts reported here demonstrate that S. ciliata exhibits a germination behaviour similar to halophytes (Ungar 1962(Ungar , 1978Rozema 1975) and glycophytes (Bazzaz 1973;Redmann 1974;Rozema 1975). Seed germi nati on remai ned relatively unaffected by salinity up to 215mM NaCI; however it was completely inhibited at 340mM NaCI.…”

Section: Discussionsupporting

confidence: 56%

“…The rapidity of germination in S. ciliata suggests some sort of stimulation effects of NaCI, which was also reported in some coas tal plants (Woodell 1985). The rapid germination of seeds after salt pre-treatment has been attributed to weakening of the testa by solutions of low osmotic potential (Ungar 1978) and was also reported for Triglochin bulbosa and T. striata (Naidoo & Naicker 1992) as well as Blutaparon portulacoides (Cordazzo 1994). The capacity of seeds of maritime species to remain dormant when subjected to high salinity is probably of adaptive value since seeds are often dispersed by the seawater and germination would be a disadvantage or lethal under such conditions (Lesko & Walker 1969;Ignaciuk & Lee 1980).…”

Section: Discussionsupporting

confidence: 52%

“…The capacity of seeds of maritime species to remain dormant when subjected to high salinity is probably of adaptive value since seeds are often dispersed by the seawater and germination would be a disadvantage or lethal under such conditions (Lesko & Walker 1969;Ignaciuk & Lee 1980). An additional importance of this dormancy response to high salt stress in seeds of coastal species is that it permits seed survival during dry periods, when salinity hazards increases (Ungar 1978), and during periods of temporary flooding with highly saline waters (Ungar & Hogan 1970). However, after rainfall has leached or diluted the excess salts, seeds will still be capable of germinating, as was reported in Cakile marítima (Hocking 1982;Cordazzo 1994), C. edentula (Maun et ai.…”

Section: Discussionmentioning

confidence: 87%

“…Substrate salinity . can act as a major selective force, determining seed germination, seedling establishment and survi vaI in coastal areas (Barbour 1970;Seneca 1972;Ungar 1978). The adverse effects of salinity on plant growth and development are complex, and may resuIt from a combination of factors of nutritional, toxic and osmotic nature (Flowers et aI.…”

Section: Introductionmentioning

confidence: 99%

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Effects of salinity on seed germination, seedling growth and survival of Spartina ciliata Brong

Cordazzo

1999

Acta Bot. Bras.

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-(Effects of salinity on seed germination, seedling growth and survival of Spanina ciliata Brong.) The effects of different salinities on the germination of Spartina ciliata seeds were tested during 40 days in the laboratory, using six concentrations of NaCI (0,45, 80, 130, 170 and 215 mM) besides three concentrations of seawater (25, 30 and 35%0). In addition, the survival and growth of seedlings were tested in five constant salinity regimes (O, 45, 80 and 170 mM NaCI) as well as in five regimes of simulating seawater overwash. The results showed that seeds possed a high germination capacity over a wide range of salinities (O to 215 mM NaC\). Although concentrations close to full-strength seawater completely inhibited seed germination, the transfer of the ungerminated seeds to freshwater immediately stimulated this. The effects of salinity on seedling growth showed that shoot height and root length were the variables most sensitive to salt stress. Frequent overwash with seawater significantly reduced the survival and growth of Spartina ciliata seedlings. The success in seed germination, survival, and growth of Spartina ciliata in salinities above those normally found in the natural environment could explain the species being distributed throughout salt-stressed foredune habitats in southern Brazil.Key words -salinity stress, seed germination, seedling growth, coastal dune plant, Spartina ciliata

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Section: Discussionsupporting

confidence: 56%

Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Effects of salinity on seed germination, seedling growth and survival of Spartina ciliata Brong

Cordazzo

1999

Acta Bot. Bras.

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“…However, salt tolerance of plants varies with the age of the plant and the environmental conditions (Flowers et al 1977). Some halophytes, whose vegetative growth is often stimulated by salinity, do not appear to be salt tolerant during germination (Ungar 1978;Jefferies 1988).…”

Section: Introductionmentioning

confidence: 99%

Soil salinity and water status affect growth ofPhoenix dactyliferaseedlings

Ramoliya

Pandey

2003

New Zealand Journal of Crop and Horticultural Science

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Effects of salinisation of soil on emergence, growth, and physiological attributes of seedlings of the date palm (Phoenix dactylifera) 'Rati' (Palmaceae) were studied. A mixture of chlorides and sulfates of Na, K, Ca, and Mg was added to the soil and salinity was maintained at 4.3, 6.0, 8.2, 10.5, 12.8, and 14.6 dS m -1 . A negative relationship between percentage seed germination and salt concentration was obtained. Seedlings did not emerge when soil salinity exceeded 12.8 dS m -1 . Results suggested that this species is salt tolerant at the seed germination stage. Seedlings survived and grew up to a soil salinity of 12.8 dS m -1 and evidently this species is salt tolerant at the seedling stage as well. Elongation of stem and root was retarded by increasing salt stress. However, this species has a tendency for rapid root penetration and roots are able to extract water from dry saline soil (6.0% moisture) below the permanent wilting percentage. Among the tissues, young roots and leaf tissue were most tolerant, whereas stem tissue was most sensitive to salt stress. This species is a halophyte and adapted to salt stress conditions by the evolution of an osmoregulation mechanism. However, osmoregulation is effective for salt tolerance only to a limited range in the continuum of salt stress. The ability of this plant to thrive in dry regions is further conferred by the xeromorphic features of its leaves.

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Produced water's impact on soil properties: Remediation challenges and opportunities

Green¹,

DeSutter

Meehan

et al. 2020

Agrosystems Geosci & Env

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The choice of remediation of oil‐produced water (aka brine) spills depends on the severity of contamination, environmental factors, cost‐effectiveness, and relative efficiency of salt removal. The objective of this review is to summarize the current practices that are used to remediate brine spills or abandoned evaporation pits within the Bakken and Three Forks regions of the Williston Basin within the upper Great Plains. The most common current methods are “dig and haul” and the use of chemical amendments such as gypsum (CaSO4) or organic amendments (manure, straw, etc.) to promote soil flocculation and the downward leaching of salts out of the topsoil. These methods, however, can fail to achieve sustained remediation success in a cost‐effective and timely manner, making continued research into alternative methods necessary. The use of electrokinetics, crystallization inhibitors, wicking materials, and plant‐growth promoting rhizobacteria hold promise for in‐situ cleanup of contaminated sites.

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Halophyte seed germination

Cited by 330 publications

References 104 publications

Effects of salinity on seed germination, seedling growth and survival of Spartina ciliata Brong

Effects of salinity on seed germination, seedling growth and survival of Spartina ciliata Brong

Soil salinity and water status affect growth ofPhoenix dactyliferaseedlings

Produced water's impact on soil properties: Remediation challenges and opportunities

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