Salinity tolerance of Beta vulgaris ssp. maritima. Part I. Biomass production and osmotic adjustment

2003 ◽  
pp. 41-49 ◽  
Author(s):  
S. Daoud ◽  
H.-W. Koyro ◽  
M. C. Harrouni
Keyword(s):  
Beta Vulgaris ◽  
Biomass Production ◽  
Salinity Tolerance ◽  
Osmotic Adjustment

scholarly journals Physiological and Biochemical Responses to Salt Stress of Alfalfa Populations Selected for Salinity Tolerance and Grown in Symbiosis with Salt-Tolerant Rhizobium

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 569
Author(s):  
Annick Bertrand ◽  
Craig Gatzke ◽  
Marie Bipfubusa ◽  
Vicky Lévesque ◽  
Francois P. Chalifour ◽  
...  
Keyword(s):  
Amino Acids ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Water Content ◽  
Salinity Tolerance ◽  
Osmotic Adjustment ◽  
Recurrent Selection ◽  
Aromatic Amino Acids ◽  
Nacl Stress ◽  
Salt Tolerant

Alfalfa and its rhizobial symbiont are sensitive to salinity. We compared the physiological responses of alfalfa populations inoculated with a salt-tolerant rhizobium strain, exposed to five NaCl concentrations (0, 20, 40, 80, or 160 mM NaCl). Two initial cultivars, Halo (H-TS0) and Bridgeview (B-TS0), and two populations obtained after three cycles of recurrent selection for salt tolerance (H-TS3 and B-TS3) were compared. Biomass, relative water content, carbohydrates, and amino acids concentrations in leaves and nodules were measured. The higher yield of TS3-populations than initial cultivars under salt stress showed the effectiveness of our selection method to improve salinity tolerance. Higher relative root water content in TS3 populations suggests that root osmotic adjustment is one of the mechanisms of salt tolerance. Higher concentrations of sucrose, pinitol, and amino acid in leaves and nodules under salt stress contributed to the osmotic adjustment in alfalfa. Cultivars differed in their response to recurrent selection: under a 160 mM NaCl-stress, aromatic amino acids and branched-chain amino acids (BCAAs) increased in nodules of B-ST3 as compared with B-TS0, while these accumulations were not observed in H-TS3. BCAAs are known to control bacteroid development and their accumulation under severe stress could have contributed to the high nodulation of B-TS3.

Association of SSR markers and morpho-physiological traits associated with salinity tolerance in sugar beet (Beta vulgaris L.)

Euphytica ◽  
2015 ◽  
Vol 205 (3) ◽  
pp. 785-797 ◽  
Author(s):  
Zahra Abbasi ◽  
Mohammad Mahdi Majidi ◽  
Ahmad Arzani ◽  
Abazar Rajabi ◽  
Parisa Mashayekhi ◽  
...  
Keyword(s):  
Sugar Beet ◽  
Beta Vulgaris ◽  
Ssr Markers ◽  
Salinity Tolerance ◽  
Physiological Traits

Linking osmotic adjustment and stomatal characteristics with salinity stress tolerance in contrasting barley accessions

2015 ◽  
Vol 42 (3) ◽  
pp. 252 ◽  
Author(s):  
Min Zhu ◽  
Meixue Zhou ◽  
Lana Shabala ◽  
Sergey Shabala
Keyword(s):  
Stress Tolerance ◽  
Salinity Stress ◽  
Salinity Tolerance ◽  
Osmotic Adjustment ◽  
Inorganic Ions ◽  
Plant Performance ◽  
Hordeum Vulgare L ◽  
Stomatal Characteristics ◽  
Stomata Density ◽  
Salinity Stress Tolerance

Salinity tolerance is a complex trait – both physiologically and genetically – and the issue of which mechanism or trait has bigger contribution towards the overall plant performance is still hotly discussed in the literature. In this work, a broad range of barley (Hordeum vulgare L. and Hordeum spontaneum L.) genotypes contrasting in salinity stress tolerance were used to investigate the causal link between plant stomatal characteristics, tissue ion relations, and salinity tolerance. In total, 46 genotypes (including two wild barleys) were grown under glasshouse conditions and exposed to moderate salinity stress (200mM NaCl) for 5 weeks. The overall salinity tolerance correlated positively with stomata density, leaf K+ concentration and the relative contribution of inorganic ions towards osmotic adjustment in the shoot. At the same time, no correlation between salinity tolerance and stomatal conductance or leaf Na+ content in the shoot was found. Taken together, these results indicate the importance of increasing stomata density as an adaptive tool to optimise efficiency of CO2 assimilation under moderate saline conditions, as well as benefits of the predominant use of inorganic osmolytes for osmotic adjustment in barley. Another finding of note was that wild barleys showed rather different strategies dealing with salinity, as compared with cultivated varieties.

scholarly journals Photosynthetic capacity, osmotic adjustment and antioxidant system in sugar beet (Beta vulgaris L.) in response to alkaline stress

2019 ◽  
Vol 57 (1) ◽  
pp. 350-360 ◽  
Author(s):  
C.L. ZOU ◽  
Y.B. WANG ◽  
L. LIU ◽  
D. LIU ◽  
P.R. WU ◽  
...  
Keyword(s):  
Sugar Beet ◽  
Beta Vulgaris ◽  
Antioxidant System ◽  
Osmotic Adjustment ◽  
Photosynthetic Capacity ◽  
Alkaline Stress

scholarly journals Wild and Cultivated Sunflower (Helianthus annuus L.) Do Not Differ in Salinity Tolerance When Taking Vigor into Account

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1013
Author(s):  
Vivian H. Tran ◽  
Andries A. Temme ◽  
Lisa A. Donovan
Keyword(s):  
Helianthus Annuus ◽  
Salinity Tolerance ◽  
Osmotic Adjustment ◽  
Abiotic Stress Tolerance ◽  
Wild Relatives ◽  
Elemental Content ◽  
Growth Responses ◽  
Helianthus Annuus L ◽  
Trade Offs ◽  
Wild Accessions

Cultivated crops are expected to be less stress tolerant than their wild relatives, leading to efforts to mine wild relatives for traits to increase crop tolerance. However, empirical tests of this expectation often confound tolerance with plant vigor. We assessed whether wild and cultivated Helianthus annuus L. differed for salinity tolerance with 0 and 150 mM NaCl treatments. Salinity tolerance was assessed as the proportional reduction in biomass and as the deviation from expected performance based on vigor. Cultivated accessions had a greater proportional decline in biomass than wild accessions, but proportional decline was positively associated with vigor in both. Thus, wild and cultivated H. annuus did not differ for tolerance when variation in vigor was corrected for statistically. For traits potentially related to tolerance mechanisms, wild and cultivated accessions differed for elemental content and allocation of N, P, K, Mg, Ca, S, Na, Fe, Mn, B, Cu, and Zn for some tissues, biomass allocation, specific leaf area, and leaf succulence. However, these traits were generally unrelated to tolerance corrected for vigor. Osmotic adjustment was associated with tolerance corrected for vigor only in wild accessions where more osmotic adjustment was associated with greater tolerance. Our results for H. annuus suggest that efforts to use wild relatives to enhance crop abiotic stress tolerance will benefit from greater knowledge of traits related to plant growth responses decoupled from vigor, in order to get beyond potential growth-tolerance trade-offs.

Effets de l'adjonction de KCl ou de CaCl2 sur la tolérance au NaCl chez deux cultivars de triticale (Clercal et Beagle)

1991 ◽  
Vol 69 (10) ◽  
pp. 2113-2121 ◽  
Author(s):  
Souheil Haddad ◽  
Alain Coudret
Keyword(s):  
Plant Growth ◽  
Key Words ◽  
Salinity Tolerance ◽  
Osmotic Adjustment ◽  
Normal Cell ◽  
Culture Medium ◽  
Selectivity Ratio ◽  
Nacl Concentration ◽  
Ion Relations ◽  
Nutrient Solutions

The effects of salinity on growth along with water and ion relations were studied on two cultivars of triticale (Clercal and Beagle) after 21 days of growth under controlled conditions in nutrient solutions with or without 150 mM NaCl, and on nutrient solutions with 150 mM NaCl + 20 mM KCl or 150 mM NaCl + 20 mM CaCl2. Growth was strongly affected by an increased NaCl concentration in the culture medium, causing a water deficit linked to a drop in water (ψ) and osmotic (π) potentials, followed by an accumulation of Na+ and a reduction of K+ in the aboveground part of the triticales. Addition of KCl or CaCl2 to NaCl-containing media improved NaCl tolerance of the plant: growth increased more than 30%, hydration of tissues improved, and K+ uptake was normal, as seen by an increased K+/Na+ selectivity ratio in the aboveground parts. The two cultivars did not show the same degree of tolerance on these media. The protection afforded by KCl or CaCl2 in the NaCl-containing media was more significant for 'Clercal' than for 'Beagle'. Moreover, it seems that in presence of KCl or CaCl2, the improved K+ uptake was greater in 'Clercal' than in 'Beagle'. It is therefore possible that 'Beagle' requires less K+ than 'Clercal' for normal cell functioning. It is suggested that the K+/Na+ selectivity ratio is critical for salinity tolerance in the triticales. Key words: NaCl, KCl, and CaCl2 tolerance, growth, water, relationships, osmotic adjustment, K+–Na+ selectivity, 'Clercal', 'Beagle', triticale.

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