more information
Search within Results:

Select All    Deselect All
 |   | 
Details
   print
  Records Links
Author (up) Bajji, M.; Kinet, J.-M.; Lutts, S. file  url
openurl 
  Title Salt stress effects on roots and leaves of Atriplex halimus L. and their corresponding callus cultures Type Journal Article
  Year 1998 Publication Plant Science Abbreviated Journal Plant Science  
  Volume 137 Issue 2 Pages 131-142  
  Keywords Atriplex halimus L.; Ion accumulation; Osmotic adjustment; Organic solutes; Salinity; Tissue culture  
  Abstract Salt stress effects on growth, osmotic adjustment, mineral and organic contents and soluble peroxidase activities were determined in roots and leaves of Atriplex halimus and their corresponding callus cultures. Low NaCl doses (150 mM) promoted shoot growth, corroborating the halophilic nature of this species; in these stress conditions, Na+ concentration markedly increased in the leaves indicating that salinity resistance was not associated with the ability of the plants to restrict sodium accumulation in the aerial part. Whole organs and their corresponding calli were able to cope with high NaCl doses but there was no clear correspondence between the physiological behaviour of cell culture and whole plant. For several physiological parameters (osmotic potential (Ψs), mineral content, proline accumulation), roots were less affected by NaCl than leaves while both root and leaf calli behaved in the same way in response to salinity. NaCl-induced modifications of the recorded parameters are discussed in relation to the mechanisms of salinity resistance in this species. Evidence indicated the existence of a cellular basis for salinity resistance in A. halimus, but the expression of this cellular property at organ level appeared to be masked by the physiological complexity of the intact plant and the nature of the whole organ response was apparently determined primarily by regulation mechanisms assigned by the differentiated tissue organization.  
  Call Number Serial 683  
Permanent link to this record
 

 
Author (up) Bliss, R.D.; Platt-Aloia, K.A.; Thomson, W.W. file  url
openurl 
  Title Osmotic sensitivity in relation to salt sensitivity in germinating barley seeds Type Journal Article
  Year 1986 Publication Plant, Cell and Environment Abbreviated Journal Plant Cell Environ  
  Volume 9 Issue 9 Pages 721-725  
  Keywords calcium; germination; membrane permeability; salinity  
  Abstract Abstract Cultivars of barley (Hordeum vulgare L.) were tested for germination sensitivity to progressively higher concentrations of salt, mannitol, and betaine. The three solutes were equally inhibitory at equal osmotic potential, but there was a consistent difference in osmotic sensitivity between two cultivars, CM-67 and Briggs (Briggs was the most sensitive). There was no difference between the two cultivars in salt or water uptake from salt solutions during imbibition. Brief presoaking in water did not improve salt resistance, indicating that a hydration-dependent decrease in membrane permeability is not involved in salt tolerance. The calcium content of Briggs was higher than CM-67. These results suggest that salt inhibits barley germination primarily by osmotic effects, and that salt influx during imbibition does not play a role in this inhibition. A hypothesis regarding salt effects on germination is discussed.  
  Call Number Serial 1222  
Permanent link to this record
 

 
Author (up) Ghars, M.A.; Parre, E.; Debez, A.; Bordenave, M.; Richard, L.; Leport, L.; Bouchereau, A.; Savoure, A.; Abdelly, C. url  openurl
  Title Comparative salt tolerance analysis between Arabidopsis thaliana and Thellungiella halophila, with special emphasis on K(+)/Na(+) selectivity and proline accumulation Type Journal Article
  Year 2008 Publication Journal of Plant Physiology Abbreviated Journal J Plant Physiol  
  Volume 165 Issue 6 Pages 588-599  
  Keywords Arabidopsis/drug effects/growth & development/*metabolism; Biomass; Brassicaceae/drug effects/growth & development/*metabolism; Potassium/*metabolism; Proline/*metabolism; Salinity; *Salt-Tolerance/drug effects; Sodium/*metabolism; Sodium Chloride/pharmacology; Stress, Physiological/drug effects; Water/metabolism  
  Abstract The eco-physiology of salt tolerance, with an emphasis on K(+) nutrition and proline accumulation, was investigated in the halophyte Thellungiella halophila and in both wild type and eskimo-1 mutant of the glycophyte Arabidopsis thaliana, which differ in their proline accumulation capacity. Plants cultivated in inert sand were challenged for 3 weeks with up to 500mM NaCl. Low salinity significantly decreased A. thaliana growth, whereas growth restriction was significant only at salt concentrations equal to or exceeding 300mM NaCl in T. halophila. Na(+) content generally increased with the amount of salt added in the culture medium in both species, but T. halophila showed an ability to control Na(+) accumulation in shoots. The analysis of the relationship between water and Na(+) contents suggested an apoplastic sodium accumulation in both species; this trait was more pronounced in A. thaliana than in T. halophila. The better NaCl tolerance in the latter was associated with a better K(+) supply, resulting in higher K(+)/Na(+) ratios. It was also noteworthy that, despite highly accumulating proline, the A. thaliana eskimo-1 mutant was the most salt-sensitive species. Taken together, our findings indicate that salt tolerance may be partly linked to the plants' ability to control Na(+) influx and to ensure appropriate K(+) nutrition, but is not linked to proline accumulation.  
  Call Number Serial 230  
Permanent link to this record
 

 
Author (up) Oraby, H.; Ahmad, R. file  url
openurl 
  Title Physiological and biochemical changes of CBF3 transgenic oat in response to salinity stress Type Journal Article
  Year 2012 Publication Plant Science : an International Journal of Experimental Plant Biology Abbreviated Journal Plant Sci  
  Volume 185-186 Issue Pages 331-339  
  Keywords Arabidopsis--genetics; Arabidopsis Proteins--genetics, metabolism; Avena sativa--drug effects, genetics, growth & development, physiology; Biomass; Droughts; Gene Expression; Gene Expression Regulation, Plant--physiology; Photosynthesis--drug effects; Plant Leaves--drug effects, genetics, growth & development, physiology; Plant Proteins--genetics, metabolism; Plant Roots--drug effects, genetics, growth & development, physiology; Plant Shoots--drug effects, genetics, growth & development, physiology; Plant Transpiration--drug effects; Plants, Genetically Modified; Promoter Regions, Genetic--genetics; Salinity; Seedling--drug effects, genetics, growth & development, physiology; Sodium Chloride--pharmacology; Stress, Physiological--physiology; Transcription Factors--genetics, metabolism  
  Abstract Salinity is a major abiotic constraint affecting oat productivity. Several physiological and biochemical traits have been found to be related to yield maintenance under salinity. The impact of introducing the Arabidopsis CBF3 gene controlled by the rd29A stress-inducible promoter in T(2) transgenic oat on salinity tolerance and associated physiological changes were studied. Compared with the non-transgenic control, transgenic T(2) plants exhibited greater growth and showed significant maintenance of leaf area, relative water content, chlorophyll content, photosynthetic and transpiration rates as well as increased levels of proline and soluble sugars under high salt stress. These physiological changes delayed leaf-wilting symptoms, increased tolerance and reduced yield loss. At a salinity stress level of 100mM, the CBF3-overexpressing transgenic oat showed a yield loss of 4-11% compared with >56% for the non-transgenic control. These results demonstrate that stress-inducible over-expression of CBF3 may have the potential to enhance abiotic stress tolerance in oat.  
  Call Number Serial 238  
Permanent link to this record
 

 
Author (up) Palmegiano, G.B.; D'Apote, M.P. file  url
doi  openurl
  Title Combined effects of temperature and salinity on cuttlefish (Sepia officinalis L.) hatching Type Journal Article
  Year 1983 Publication Aquaculture Abbreviated Journal Aquaculture  
  Volume 35 Issue Pages 259-264  
  Keywords Cephalopod; Salinity  
  Abstract In an investigation of conditions suitable for achieving commercial production of Sepia officinalis L. in a brackish lagoon by means of egg sowing, the hatching of the eggs of this marine cephalopod were studied under different combined temperature and salinity conditions. Two series of experiments ( 3 × 3 and 3 × 2 designs) were run over the temperature range 1524°C and the salinity range 2333 S. Temperature was found to affect only the incubation time, and its relevant regression function is calculated. Salinity had a significant inhibitory effect on hatching at all of the temperatures investigated. No interactive effect between the two parameters was observed. A comparison is made with the results obtained using other temperature and salinity profiles relating to the Lesina lagoon. It is concluded that the environmental conditions occurring in May represent the minimum conditions for obtaining a marketable size harvest in autumn. It is in fact during this period that the lagoon water reaches a temperature of about 20°C and a salinity of 28%., allowing 50% hatching to be achieved in 30 days.  
  Call Number Serial 605  
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Save Citations: