scholarly journals Revisiting the Salinity Tolerance of Crapemyrtles (Lagerstroemia spp.)

2009 ◽  
Vol 35 (3) ◽  
pp. 129-134
Author(s):  
Raul Cabrera
Keyword(s):  
Salt Tolerance ◽  
Chlorophyll Content ◽  
Salinity Tolerance ◽  
Irrigation Water ◽  
Salt Tolerant ◽  
Nacl Salinity ◽  
Chlorophyll Contents ◽  
Leaf Tissues ◽  
The U.S ◽  
Indica Cultivar

The crapemyrtle (Lagerstroemia L.) is one of the most popular flowering trees in the U.S. and abroad. L. indica cultivars have dominated urban and landscape settings until their recent displacement by modern interspecific L. indica × L. fauriei Kohene hybrids. This study evaluated the salt tolerance of an older L. indica cultivar, ‘Pink Lace,’ and the hybrids ‘Natchez’ and ‘Basham’s Party Pink.’ While the growth of these three cultivars was significantly and negatively affected by increasing NaCl salinity (0 to 24 mM) in the irrigation water, the shoot to root ratio (S/R) and aesthetic parameters (chlorophyll content and salt burn ratings) of ‘Pink Lace’ was the most affected. This cultivar showed the most responsive relationships between salt burn ratings and sodium (Na) and chloride (Cl) accumulation in leaf tissues. ‘Basham’s Party Pink’ was rated as the most salt tolerant, with relatively steady S/R, chlorophyll contents and salt burn rating across all salinities, and its leaf tissues had the lowest accumulation of Na and Cl. Results from this study also support the hypothesis that geographical and ecological origins of the parent Lagerstroemia species and selections largely influences the relative salinity tolerance of the cultivars.

scholarly journals Salinity Tolerance of Select Wildflower Species in a Hydroponic Setting

HortScience ◽  
2020 ◽  
Vol 55 (7) ◽  
pp. 1119-1131
Author(s):  
Iryna Andrenko ◽  
Thayne Montague ◽  
Cynthia McKenney ◽  
Russell Plowman
Keyword(s):  
Salt Tolerance ◽  
Plant Growth ◽  
Salinity Tolerance ◽  
Irrigation Water ◽  
Block Design ◽  
Wildlife Habitat ◽  
Salinity Treatment ◽  
Salt Tolerant ◽  
Percent Survival ◽  
Aesthetic Appearance

Water quality and quantity are critical issues in the Southwest United States and many other locations in the world. Use of reclaimed water for landscape irrigation can conserve potable water significantly and possibly reduce fertilizer application. A potential concern of using alternative water sources is elevated salt levels, which can have adverse effects on plant growth and aesthetic appearance. Most Texas native wildflowers are known to be hardy and easy to maintain, and are drought tolerant after establishment. In addition, native wildflowers provide wildlife habitat and support native pollinators. However, little information is available on salinity tolerance of many Texas native wildflower species. In this study, two separate hydroponic experiments were conducted to determine salt tolerance of three Texas native wildflower species: Gaura villosa Torr. (wooly gaura), Xanthisma texanum DC. (Texas sleepy daisy), and Ipomopsis rubra (L.) Wherry (standing cypress). Species were suspended in a hydroponic setting using a randomized complete block design with a control [municipal reverse-osmosis (RO) water with a nutrition solution at an electrical conductivity (EC) of 3.0 dS·m–1] and three salinity treatments: 5.0, 7.0, and 11.0 dS·m–1 EC. Sixty days after salinity treatments were initiated, percent survival, visual rating, fresh weight, and length measurements were recorded on root and shoot tissue. To determine tissue percentage sodium (Na+), calcium (Ca2+), and chloride (Cl–), shoot and root tissues were dried and ground for tissue analysis. At the end of each experiment, total percent survival for X. texanum, G. villosa, and I. rubra were 100%, 94%, and 76%, respectively, with the greatest mortality rate at the highest salinity treatment. Shoot dry weight and plant growth index (PGI) decreased in all three species as salinity of irrigation water increased. Visual qualities of all species were mainly compromised at the highest salinity level. Ion concentrations in root and shoot tissues were affected by salinity levels and varied among species. Different mechanisms of salt tolerance (ion exclusion, salt excretion, and tissue tolerance to high concentrations of Na+ or Cl–) have been observed among wildflower species, and results indicate different salt tolerance mechanisms were exhibited by each trial species. In addition, results indicate I. rubra can be identified as moderately salt tolerant (EC up to 7.0 dS·m–1), whereas, X. texanum and G. villosa can be classified as salt tolerant (EC up to 11.0 dS·m–1). Results from this study suggest great potential of these native Texas wildflowers in landscapes using limited-quality irrigation water or landscapes with soil salinity concerns.

Application of SSR Technique for the Identification of Markers Linked to Salinity Tolerance in Rice

2013 ◽  
Vol 19 (2) ◽  
pp. 57-65
Author(s):  
MH Kabir ◽  
MM Islam ◽  
SN Begum ◽  
AC Manidas
Keyword(s):  
Salt Tolerance ◽  
Ssr Markers ◽  
Salinity Tolerance ◽  
Seedling Stage ◽  
Phenotypic Screening ◽  
Salt Tolerant ◽  
Marker Assisted Breeding ◽  
Hydroponic System ◽  
Rice Landrace ◽  
Salt Susceptible

A cross was made between high yielding salt susceptible BINA variety (Binadhan-5) with salt tolerant rice landrace (Harkuch) to identify salt tolerant rice lines. Thirty six F3 rice lines of Binadhan-5 x Harkuch were tested for salinity tolerance at the seedling stage in hydroponic system using nutrient solution. In F3 population, six lines were found as salt tolerant and 10 lines were moderately tolerant based on phenotypic screening at the seedling stage. Twelve SSR markers were used for parental survey and among them three polymorphic SSR markers viz., OSR34, RM443 and RM169 were selected to evaluate 26 F3 rice lines for salt tolerance. With respect to marker OSR34, 15 lines were identified as salt tolerant, 9 lines were susceptible and 2 lines were heterozygous. While RM443 identified 3 tolerant, 14 susceptible and 9 heterozygous rice lines. Eight tolerant, 11 susceptible and 7 heterozygous lines were identified with the marker RM169. Thus the tested markers could be efficiently used for tagging salt tolerant genes in marker-assisted breeding programme.DOI: http://dx.doi.org/10.3329/pa.v19i2.16929 Progress. Agric. 19(2): 57 - 65, 2008

scholarly journals Evaluation of salinity tolerance indices in North African barley accessions at reproductive stage

2019 ◽  
Vol 55 (No. 2) ◽  
pp. 61-69 ◽  
Author(s):  
Dorsaf Allel ◽  
Anis BenAmar ◽  
Mounawer Badri ◽  
Chedly Abdelly
Keyword(s):  
Salt Tolerance ◽  
Grain Yield ◽  
Salinity Tolerance ◽  
Selection Criteria ◽  
Reproductive Stage ◽  
Shoot Biomass ◽  
Salt Tolerant ◽  
North African ◽  
Grain Number ◽  
Selection Indices

Soil salinity is one of the main factors limiting cereal productivity in worldwide agriculture. Exploitation of natural variation in local barley germplasm is an effective approach to overcome yield losses. Three gene pools of North African Hordeum vulgare L. grown in Tunisia, Algeria and Egypt were evaluated at the reproductive stage under control and saline conditions. Assessment of stress tolerance was monitored using morphological, yield-related traits and phenological parameters of reproductive organs showing significant genetic variation. High heritability and positive relationships were found suggesting that some traits associated with salt tolerance could be used as selection criteria. The phenotypic correlations revealed that vegetative traits including shoot biomass, tiller number and leaf number along with yield-related traits such as spike number, one spike dry weight, grain number/plant and grain number/spike were highly positively correlated with grain yield under saline conditions. Hence, these traits can be used as reliable selection criteria to improve barley grain yield. Keeping a higher shoot biomass and longer heading and maturity periods as well as privileged filling ability might contribute to higher grain production in barley and thus could be potential target traits in barley crop breeding toward improvement of salinity tolerance. Multiple selection indices revealed that salt tolerance trait index provided a better discrimination of barley landraces allowing selection of highly salt-tolerant and highly productive genotypes under severe salinity level. Effective evaluation of salt tolerance requires an integration of selection indices to successfully identify and characterize salt tolerant lines required for valuable exploitation in the management of salt-affected areas.  

scholarly journals Early Growth Stage Characterization and the Biochemical Responses for Salinity Stress in Tomato

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 712
Author(s):  
Md Sarowar Alam ◽  
Mark Tester ◽  
Gabriele Fiene ◽  
Magdi Ali Ahmed Mousa
Keyword(s):  
Salt Tolerance ◽  
Salinity Tolerance ◽  
Salinity Treatment ◽  
Salt Tolerant ◽  
Improvement Program ◽  
Biochemical Basis ◽  
Elevated Salinity ◽  
Tolerance Indices ◽  
Promising Source ◽  
Tomato Genotypes

Salinity is one of the most significant environmental stresses for sustainable crop production in major arable lands of the globe. Thus, we conducted experiments with 27 tomato genotypes to screen for salinity tolerance at seedling stage, which were treated with non-salinized (S1) control (18.2 mM NaCl) and salinized (S2) (200 mM NaCl) irrigation water. In all genotypes, the elevated salinity treatment contributed to a major depression in morphological and physiological characteristics; however, a smaller decrease was found in certain tolerant genotypes. Principal component analyses (PCA) and clustering with percentage reduction in growth parameters and different salt tolerance indices classified the tomato accessions into five key clusters. In particular, the tolerant genotypes were assembled into one cluster. The growth and tolerance indices PCA also showed the order of salt-tolerance of the studied genotypes, where Saniora was the most tolerant genotype and P.Guyu was the most susceptible genotype. To investigate the possible biochemical basis for salt stress tolerance, we further characterized six tomato genotypes with varying levels of salinity tolerance. A higher increase in proline content, and antioxidants activities were observed for the salt-tolerant genotypes in comparison to the susceptible genotypes. Salt-tolerant genotypes identified in this work herald a promising source in the tomato improvement program or for grafting as scions with improved salinity tolerance in tomato.

scholarly journals Effect of Sulfur and Clean Salt on Antioxidant Enzymes and Proline Content in Improving Salt Tolerance of Two Lettuce Cultivars Grown in Basrah

2019 ◽  
Vol 32 ◽  
pp. 80-89
Author(s):  
Jameel H. Hiji ◽  
Abbas M. Jasim ◽  
Awatif N. Jerry
Keyword(s):  
Electrical Conductivity ◽  
Antioxidant Enzymes ◽  
Salt Tolerance ◽  
Adverse Effects ◽  
Irrigation Water ◽  
Sandy Loam ◽  
Proline Content ◽  
Salt Tolerant ◽  
Loam Soil

The experiment was conducted during 2017-2018 and 2018-2019 winter seasons at Abu Al-Khaseeb District at basrah /Iraq on sandy loam soil  to study the effect of sulfur at five concentration ( 0 , 500 , 1000, 1500 and 2000) kg. Ha-1, clean salt at three concentration (0, 0.5 and 1.0) ml. L-1, two cultivars of lettuce local and fajr and interaction among them  at electrical conductivity of the irrigation water (7.85 and 9.69) dS.m-1.  Result showed significant reduction in the activity of catalase (CAT) and peroxidase (POD) enzymes and proline content in all treatments of sulfur and clean salt especially at 2000 Kg. Ha-1 sulfur and clean salt at 1.0 ml L-1had significantly decrease in CAT activity (295.80 ? 341.65) U mg–1 FW, POD activity (7.86? 8.98) U mg–1 FW and proline (0.50 ? 0.80) mg g-1DW, comparing with control of CAT activity (663.21, 814.65) U mg–1 FW and POD activity (13.83, 15.52) mg–1 FW and proline (1.19, 2.03) mg g-1DW, respectively for two seasons due to the role of sulfur and clean salt ameliorates the adverse effects of salinity on plants. Fajr lettuce is more salt-tolerant than local due to less antioxidant enzyme levels POD, CAT and proline.

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.

scholarly journals Detecting Salt Tolerance in Doubled Haploid Wheat Lines

Agronomy ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 211 ◽  
Author(s):  
Al-Ashkar ◽  
Alderfasi ◽  
El-Hendawy ◽  
Al-Suhaibani ◽  
El-Kafafi ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Salt Tolerance ◽  
Salinity Tolerance ◽  
Doubled Haploid ◽  
Dry Weight ◽  
Shoot Length ◽  
Salt Tolerant ◽  
Breeding Programs ◽  
Shoot Dry Weight ◽  
Wheat Lines

Improving salt tolerance of genotypes requires a source of genetic variation and multiple accurate selection criteria for discriminating their salt tolerance. A combination of morpho-physiological and biochemical parameters and multivariate analysis was used to detect salt tolerance variation in 15 wheat lines developed by doubled haploid (DHL) technique. They were then compared with the salt-tolerant check cultivar Sakha 93. Salinity stress was investigated at three salinity levels (0, 100, and 200 mM NaCl) for 25 days. Considerable genetic variation was observed for all traits, as was high heritability (>60%) and genetic gain (>20%). Principal component analysis indicated the ability of nine traits (root number, root length, root dry weight, shoot length, shoot dry weight, specific root length, relative water content, membrane stability index, and catalase) to identify differences in salinity tolerance among lines. Three traits (shoot length, shoot dry weight, and catalase) were indicative of salt-tolerance, indicating their importance in improving and evaluating salt tolerant genotypes for breeding programs. The salinity tolerance membership index based on these three traits classified one new line (DHL21) and the check cultivar (Sakha 93) as highly salt-tolerant, DHL25, DHL26, DHL2, DHL11, and DHL5 as tolerant, and DHL23 and DHL12 as intermediate. Discriminant function analysis and MANOVA suggested differences among the five groups of tolerance. Among the donor genotypes, Sakha 93 remained the donor of choice for improving salinity tolerance during the seedling stage. The tolerated lines (DHL21, DHL25, DHL26, DHL2, DHL11, and DHL5) could be also recommended as useful and novel genetic resources for improving salinity tolerance of wheat in breeding programs.

scholarly journals Genomic and transcriptomic analysis reveal molecular basis of salinity tolerance in a novel strong salt-tolerant rice landrace Changmaogu

Rice ◽  
2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Bing-Rui Sun ◽  
Chong-Yun Fu ◽  
Zhi-Lan Fan ◽  
Yu Chen ◽  
Wen-Feng Chen ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Salinity Tolerance ◽  
Molecular Basis ◽  
Carotenoid Biosynthesis ◽  
Seedling Stage ◽  
Differentially Expressed ◽  
Salt Tolerant ◽  
Transcriptomic Sequencing ◽  
Rice Landrace

Abstract Background Salt stress is an important factor that limits rice yield. We identified a novel, strongly salt tolerant rice landrace called Changmaogu (CMG) collected from a coastal beach of Zhanjiang, Guangdong Province, China. The salt tolerance of CMG was much better than that of the international recognized salt tolerant rice cultivar Pokkali in the germination and seedling stages. Results To understand the molecular basis of salt tolerance in CMG, we performed BSA-seq for two extreme bulks derived from the cross between CMG and a cultivar sensitive to salt, Zhefu802. Transcriptomic sequencing was conducted for CMG at the germination and young seedling stages. Six candidate regions for salt tolerance were mapped on Chromosome 1 by BSA-seq using the extreme populations. Based on the polymorphisms identified between both parents, we detected 32 genes containing nonsynonymous coding single nucleotide polymorphisms (SNPs) and frameshift mutations in the open reading frame (ORF) regions. With transcriptomic sequencing, we detected a large number of differentially expressed genes (DEGs) at the germination and seedling stages under salt stress. KEGG analysis indicated two of 69 DEGs shared at the germination and seedling stages were significantly enriched in the pathway of carotenoid biosynthesis. Of the 169 overlapping DEGs among three sample points at the seedling stage, 13 and six DEGs were clustered into the pathways of ABA signal transduction and carotenoid biosynthesis, respectively. Of the 32 genes carrying sequence variation, only OsPP2C8 (Os01g0656200) was differentially expressed in the young seedling stage under salt stress and also showed sequence polymorphism in the ORFs between CMG and Zhefu802. Conclusion OsPP2C8 was identified as the target candidate gene for salinity tolerance in the seedling stage. This provides an important genetic resource for the breeding of novel salt tolerant rice cultivars.

Influence of NaCl Salinity on the Behaviour of Protease, Aminopeptidase and Carboxypeptidase in Rice Seedlings in Relation to Salt Tolerance

1990 ◽  
Vol 17 (2) ◽  
pp. 215 ◽  
Author(s):  
RS Dubey ◽  
M Rani
Keyword(s):  
Salt Tolerance ◽  
Protease Activity ◽  
Leucine Aminopeptidase ◽  
Growth Period ◽  
Salt Tolerant ◽  
Rice Seedlings ◽  
Salt Treatment ◽  
Nacl Salinity ◽  
Salt Susceptible ◽  
Salt Tolerant Cultivars

Activities of the enzymes protease, aminopeptidase and carboxypeptidase were determined in seedlings of rice cultivars with different salt tolerances raised under increasing levels of NaCl salinity. Salinity caused a marked increase in protease activity in roots as well as shoots, though activity was higher in roots than in shoots. Salt-tolerant cultivars possessed higher levels of protease activity in control as well as salt-stressed seedlings compared with salt-susceptible cultivars. During a growth period of 5-20 days, leucine aminopeptidase (LAP) activity increased up to days 10-15 and decreased thereafter. Salt treatment caused a sharp increase in LAP activity in roots of both sets of cultivars. The increase was larger in tolerant than in susceptible cultivars. In shoots, unlike roots, higher salinity suppressed LAP activity, and suppression was more marked in susceptible cultivars than in tolerant ones. Carboxypeptidase activity was higher in susceptible cultivars than in tolerant ones under both control as well as salt treatments. Roots maintained higher levels of carboxypeptidase activity than shoots. Results suggest an increased rate of proteolysis in salt-stressed rice seedlings and an association of salt-tolerance ability with higher protease and aminopeptidase activities and lower carboxypeptidase activity under salinisation.

Intervarietal variation in salt tolerance of lentil (Lens culinaris Medik.) in pot experiments

2018 ◽  
Vol 47 (3) ◽  
pp. 405-412
Author(s):  
Mohammad Zabed Hossain ◽  
Md Mehedi Hasan ◽  
Md Abul Kashem
Keyword(s):  
Cluster Analysis ◽  
Salt Tolerance ◽  
Salinity Tolerance ◽  
Lens Culinaris ◽  
Nacl Solution ◽  
Salt Tolerant ◽  
Fresh Weight ◽  
Shoot Height ◽  
Shoot Ratio ◽  
Tolerance Indices

Seven lentil (Lens culinaris Medik.) varieties were grown in pots irrigated with NaCl solution of different concentrations (0, 100, 200 and 300 mM) to assess their salinity tolerance potentials. Data revealed that the highest and the lowest salt tolerance were shown by BARI masur-5 (168.50%) and BARI masur-2 (56.32%), respectively. Cluster analysis based on the salt tolerance indices also showed grouping of the varieties into 4 clusters where BARI masur-5 was found highly salt tolerant, BARI masur-6 was moderately salt tolerant and BARI masur-1 and BARI masur-2 were least tolerant. Although shoot height, fresh weight and water content decreased, root length and root to shoot ratio increased significantly with the increase of salt concentrations in the varieties tested.

Sign in / Sign up

Export Citation Format

Share Document