scholarly journals The Evaluation of Salt Tolerance during Germination and Vegetative Growth of Asparagus, Table Beet and Sea Aster

1996 ◽  
Vol 65 (3) ◽  
pp. 579-585 ◽  
Author(s):  
Yuichi Uno ◽  
Michio Kanechi ◽  
Noboru Inagaki ◽  
Mayumi Sugimoto ◽  
Susumu Maekawa
Keyword(s):  
Salt Tolerance ◽  
Vegetative Growth

scholarly journals Genetic Analysis of Salt Tolerance during Vegetative Growth in Tomato

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 624b-624
Author(s):  
M.R. Foolad
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Vegetative Growth ◽  
Genetic Effects ◽  
Least Square ◽  
Variance Component Analysis ◽  
Tomato Cultivar ◽  
Narrow Sense Heritability ◽  
Relative Growth ◽  
The Absolute

Breeding for salt tolerance in tomato (Lycopersicon esculentum Mill.) has been restricted by insufficient knowledge of the genetic control of tolerance. The genetic basis of salt tolerance during vegetative growth was investigated by growing a salt tolerant (PI174263) and a salt sensitive tomato cultivar (UCT5) and their F1, F2, and backcross progeny in saline solutions with electrical conductivity of 0.5 (control) and 20 dS·m–1 (salt-stress). The relative salt tolerance of each generation was determined as the percentage of growth (i.e., dry matter production) under salt-stress relative to growth under control conditions. In all generations, shoot growth was significantly reduced by salt-stress. The reduction was largest in UCT5 (56.1%) and smallest in the F1 (27.4%) followed by PI174263 (32.3%). Analysis of the absolute and relative growth under salt-stress indicated that genes contributing to vigor might be different from genes conferring tolerance. Generation means analyses of the absolute and relative growth indicated that the majority of the genetic variation among generations were due to simple (additive and dominance) genetic effects; nonallelic interactions, although significant, were far less important. Partitioning of the total genetic variance by weighted least square regression analysis and variance component analysis indicated that 88% or more of the variation were due to additive genetic effects. A moderate estimate of narrow sense heritability (0.49 ± 0.09) was obtained for shoot dry weight under salt-stress treatment. The results indicate that tomato salt tolerance during vegetative growth can be improved by breeding and selection.

Effect of nitrogen nutrition on salt tolerance ofPisum sativum during vegetative growth

2005 ◽  
Vol 168 (3) ◽  
pp. 359-363 ◽  
Author(s):  
Etelvina M. de Almeida Paula Figueira ◽  
Gustavo C. Nunes Caldeira
Keyword(s):  
Salt Tolerance ◽  
Vegetative Growth ◽  
Nitrogen Nutrition

Comparison of salt tolerance during seed germination and vegetative growth in tomato by QTL mapping

Genome ◽  
1999 ◽  
Vol 42 (4) ◽  
pp. 727-734 ◽  
Author(s):  
M R Foolad
Keyword(s):  
Quantitative Trait Loci ◽  
Salt Tolerance ◽  
Seed Germination ◽  
Lycopersicon Esculentum ◽  
Quantitative Trait ◽  
Vegetative Growth ◽  
Developmental Stages ◽  
Phenotypic Correlation ◽  
Recurrent Parent ◽  
Trait Loci

The purpose of this study was to determine the genetic relationship between salt tolerance during seed germination and vegetative growth in tomato by comparing quantitative trait loci (QTLs) which confer salt tolerance at these two developmental stages. A salt-sensitive Lycopersicon esculentum line (NC84173; maternal and recurrent parent) was hybridized with a salt-tolerant accession (LA722) of Lycopersicon pimpinellifolium, and BC1 and BC1S1 populations were developed. The BC1 population was used for RFLP mapping and the BC1S1 population for evaluation of salt tolerance during germination and vegetative growth. The results indicated the presence of a small but significant correlation (r = -0.22, p < 0.05) between rate of seed germination and the percentage of plant survival under salt stress. Seven and five QTLs were identified for salt tolerance during seed germination and vegetative growth, respectively. While in most cases the location of QTLs for germination was different from that for vegetative growth, there were some coincidences in QTL locations; this was consistent with the small phenotypic correlation observed between the two traits. The overall results indicated that, in these tomato genetic materials, salt tolerance during seed germination was independent of that during vegetative growth. However, simultaneous improvement of tolerance at the two developmental stages should be possible through marker-assisted selection and breeding.Key words: Lycopersicon esculentum, L. pimpinellifolium, salt tolerance, seed germination vegetative growth, restriction fragment length polymorphism (RFLP), quantitative trait loci (QTLs).

scholarly journals Evaluation of Different Drumstick Genotypes (Moringa sp.) Against Salt Stress

2016 ◽  
Vol 13 (1) ◽  
pp. 94-100
Author(s):  
M A Latif ◽  
M Robbani ◽  
K Akhter
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Vegetative Growth ◽  
Salinity Level ◽  
Pot Experiment ◽  
Water Salinity ◽  
Split Plot ◽  
Two Factors ◽  
Main Plot ◽  
Plot Design

A pot experiment was conducted during March 2012 to February 2013 to evaluate the salt tolerance of drumstick (Moringa sp.) genotypes in a factorial split plot design. Two factors, water salinity was assigned in the main plot with 4 levels (control, 7, 10 and 13 dS/m) and10 drumstick genotypes of Bangladesh (Acc. no. 1 to Acc. no. 10) in the sub-plot with 3 replications. The data were collected for the vegetative growth, percent alive cuttings and necrosis and chlorosis of leaves on the 12thmonth of the study. The results indicated that the Acc. no. 4 from Satkhira and the Acc. no.  5 from Khulna were the best in all respects even at 10 dS/m salinity level. The results also revealed that most of the genotypes performed more or less well up to the 7 dS/m salinity but none at the 13 dS/m. No genotype showed sensitivity to the lowest salinity level. In addition, The highest concentration of total Na+ and Cl-  were observed in the shoots and the leaves of the Acc. no. 5 and Acc. no. 9 at 13 dS/m salinity level as well.The Agriculturists 2015; 13(1) 94-100

scholarly journals Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental Stages

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1487
Author(s):  
Yan Xie ◽  
Xiaoying Liu ◽  
Maurice Amee ◽  
Hua Yu ◽  
Ye Huang ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Vegetative Growth ◽  
Developmental Stages ◽  
Genotypic Variation ◽  
Forage Quality ◽  
Italian Ryegrass ◽  
Neutral Detergent Fiber ◽  
Growth Stages ◽  
Tolerance Index

Soil salinity is one of the major abiotic stresses that continues to threaten plant growth and agricultural productivity. Screening germplasm with salinity tolerance is therefore necessary. This study was designed to evaluate salt tolerance based on the integrated tolerance index. Fifteen Italian ryegrass cultivars were used to evaluate the degree of genotypic variation in salt tolerance at the germination and vegetative growth stages of plant development. Evident variations in salt tolerance were observed at the germination stage under 255 mM NaCl treatment. Root growth rate, chlorophyll content, and germination rates played a vital role in determining salt tolerance. Based on combined attributes at the germination and vegetative growth stages, Gongniu, Chuangnong, Splendor, and Abundant were identified as the most tolerant cultivars. Furthermore, the constant crude protein, lower neutral detergent fiber, and acid detergent fiber contents were measured under salinity. Compared to the control, the cultivars Tetragold, Abundant, Splendor, Muyao, Harukaze, Tegao, Dongmu 70, and Doraian were identified to have high forage quality under salt stress. Finally, we selected Splendor and Abundant as the cultivars that expressed the highest degree of salt tolerance based on combined attributes related to germination, salt tolerance, and overall forage quality. In addition, gene expression analysis between salinity tolerant and sensitive cultivars revealed that the gene response to photosystem and carbohydrate synthesis may have played a mediating role in providing tolerance to salt stress.

scholarly journals Effect of salinity stress in Setaria viridis (L.) P. Beauv. accession A10.1 during seed germination and plant development

2020 ◽  
Vol 44 ◽  
Author(s):  
Thalita Massaro Malheiros Ferreira ◽  
Mariana de Lima Santos ◽  
Cecilia Lima Lopes ◽  
Carlos Antonio Ferreira de Sousa ◽  
Manoel Teixeira Souza Junior
Keyword(s):  
Salt Tolerance ◽  
Seed Germination ◽  
Candidate Genes ◽  
Vegetative Growth ◽  
Growth Stage ◽  
Agricultural Land ◽  
Saline Stress ◽  
Initial Growth ◽  
Setaria Viridis ◽  
Model Plant

ABSTRACT Setaria viridis (L.) P. Beauv. is a species proposed to be used as model plant in reverse genetics studies for the validation of gene function. Soil salinity is a recurring problem present in more than a 100 countries worldwide, and approximately 20% of the agricultural land in the world has saline and/or sodium soils. Saline stress affects all the main processes of the plant, such as germination, growth, and, consequently, the yield. The present study aimed at determining the tolerance levels of S. viridisA10.1 to saline stress and identify its potential as a model plant to validate salt-tolerance candidate genes/alleles as well as promoter sequences from salt-responsive genes. In an initial experiment, the seeds of the plant were sown on a germination medium containing an increasing concentration of NaCl (0, 30, 60, 90, 120, or 150 mM), and maintained there during the initial growth stage; and, in another experiment, the plants at the vegetative growth stage were submitted to increasing doses of NaCl (0.0, 0.2, 0.4, 0.6, 0.8, and 1.0g per 100g of the substrate). The germination rate was found to be affected a little by the salinity, while the seedlings development was impaired right after germination. Plant in the vegetative growth stage experienced a reduction in the evapotranspiration rates and pigment levels, along with an impairment in the system of capture and use of light, and a decrease in the leaf gas exchange rates, resulting in less accumulation of dry and fresh plant biomass proportional to the salt dose used. Plants started to die within a week at doses ≥19.4 dS/m. In conclusion, A10.1 is a glycophyte plant with some level of salt-tolerance and might be used as a model plant to validate salt-tolerance candidate genes/alleles, as well as promoters salt-responsive genes, depending on the right combination of plant age and level of stress. As seed germination is affected only little by salt stress at NaCl doses of about 15 dS/m or less, A10.1 might not be used to validate genes/alleles with a putative role regarding this trait.

Identification and validation of QTLs for salt tolerance during vegetative growth in tomato by selective genotyping

Genome ◽  
2001 ◽  
Vol 44 (3) ◽  
pp. 444-454 ◽  
Author(s):  
M R Foolad ◽  
L P Zhang ◽  
G Y Lin
Keyword(s):  
Salt Tolerance ◽  
Restriction Fragment Length Polymorphism ◽  
Lycopersicon Esculentum ◽  
Length Polymorphism ◽  
Vegetative Growth ◽  
Fragment Length Polymorphism ◽  
Allele Frequencies ◽  
Salt Tolerant ◽  
Marker Allele ◽  
Restriction Fragment Length

The purpose of this study was to identify quantitative trait loci (QTLs) for salt tolerance (ST) during vegetative growth (VG) in tomato by distributional extreme analysis and compare them with the QTLs previously identified for this trait. A BC1 population (N = 792) of a cross between a moderately salt-sensitive Lycopersicon esculentum Mill. breeding line (NC84173, maternal and recurrent parent) and a salt-tolerant L. pimpinellifolium (Jusl.) Mill. accession (LA722) was evaluated for ST in solution cultures containing 700 mM NaCl + 70 mM CaCl2 (electrical conductivity, EC [Formula: see text] 64 dS/m and ψw [Formula: see text]–35.2 bars). Thirty-seven BC1 plants (4.7% of the total) that exhibited the highest ST were selected (referred to as the selected population), grown to maturity in greenhouse pots and self-pollinated to produce BC1S1 progeny seeds. The 37 selected BC1S1 progeny families were evaluated for ST and their average performance was compared with that of the parental BC1 population before selection. A realized heritability of 0.50 was obtained for ST in this population. The 37 selected BC1 plants were subjected to restriction fragment length polymorphism (RFLP) analysis using 115 markers, and marker allele frequencies were determined. Allele frequencies for the same markers were also determined in an unselected BC1 population (N = 119) of the same cross. A trait-based marker analysis (TBA), which measures differences in marker allele frequencies between selected and unselected populations, was used to identify marker-linked QTLs. Five genomic regions were detected on chromosomes 1, 3, 5, 6, and 11 bearing significant QTLs for ST. Except for the QTL on chromosome 3, all QTLs had positive alleles contributed from the salt tolerant parent LA722. Of the five QTLs, three (those on chromosomes 1, 3, and 5) were previously identified for this trait in another study, and thus were validated here. Only one of the major QTLs that was identified in our previous study was not detected here. This high level of conformity between the results of the two studies indicates the genuine nature of the identified QTLs and their potential usefulness for ST breeding using marker-assisted selection (MAS). A few BC1S1 families were identified with most or all of the QTLs and with a ST comparable to that of LA722. These families should be useful for the development of salt tolerant tomato lines via MAS.Key words: Lycopersicon esculentum, L. pimpinellifolium, salt tolerance, vegetative growth, restriction fragment length polymorphism (RFLP), quantitative trait loci (QTLs), trait-based analysis.

scholarly journals Exogenous Gibberellic Acid Ameliorates Salinity-Induced Morphological and Biochemical Alterations in Portulaca grandiflora

2018 ◽  
Vol 35 (0) ◽  
Author(s):  
A.S.A.S. SHAIKHA ◽  
S.S.A.S. SHAMSA ◽  
A.R. GABRIEL ◽  
S.S. KURUP ◽  
A.J. CHERUTH
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Gibberellic Acid ◽  
Vegetative Growth ◽  
Biochemical Parameters ◽  
Field Capacity ◽  
Dry Weight ◽  
Nacl Stress ◽  
Biochemical Alterations ◽  
Portulaca Grandiflora

ABSTRACT: An investigation was carried out to estimate the NaCl stress and ameliorative effects of Gibberellic Acid (GA3) on Portulaca grandiflora Hook. A crop experiment was conducted (CRBD) where all the pots were irrigated to field capacity. The treatments were given as (T0) control without NaCl, (T1) 80 mM NaCl, (T2) 80 mM NaCl and 50 ppm GA3, (T3) 80 mM NaCl and 75 ppm GA3 and (T4) 80 mM NaCl and 100 ppm GA3. The samples were collected at 90 DAS. It was found that plants subjected to salt stress generally showed a reduction of vegetative growth. GA3 spraying on Portulaca grandiflora with 75 ppm showed a high amelioration effect on growth and on biochemical patterns, which enhanced salt tolerance. In Portulaca grandiflora, data showed that NaCl stress inhibited fresh and dry weight and further introduced significant deviation on some biochemical parameters. However, GA3 partially ameliorated growth and some biochemical parameters of Portulaca grandiflora under NaCl stress.

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