The proteome response of salt-resistant and salt-sensitive barley genotypes to long-term salinity stress

We aimed to identify genetic variation in root growth in the cereal crop barley (Hordeum vulgare L.) in response to the early phase of salinity stress. Seminal root elongation was examined at various concentrations of salinity in seedlings of eight barley genotypes consisting of a landrace, wild barley and cultivars. Salinity inhibited seminal root elongation in all genotypes, with considerable variation observed between genotypes. Relative root elongation rates were 60–90% and 30–70% of the control rates at 100 and 150 mM NaCl, respectively. The screen identified the wild barley genotype CPI71284–48 as the most tolerant, maintaining root elongation and biomass in response to salinity. Root elongation was most significantly inhibited in the landrace Sahara. Root and shoot Na+ concentrations increased and K+ concentrations decreased in all genotypes in response to salinity. However, the root and shoot ion concentrations did not correlate with root elongation rates, suggesting that the Na+ and K+ concentrations were not directly influencing root growth, at least during the early phase of salt stress. The identification of genetic diversity in root growth responses to salt stress in barley provides important information for future genetic, physiological and biochemical characterisation of mechanisms of salinity tolerance.

Download Full-text

Response of two wheat genotype to long-term salinity stress in relation to oxidative stress and osmolyte concentration

Cereal Research Communications ◽

10.1556/crc.2013.0020 ◽

2013 ◽

Vol 41 (3) ◽

pp. 388-399 ◽

Cited By ~ 1

Author(s):

C. Chaffei Haouari ◽

A. Hajjaji Nasraoui ◽

E. Carrayol ◽

H. Gouia

Keyword(s):

Oxidative Stress ◽

Salinity Stress ◽

Wheat Genotype

Download Full-text

Responses of pelargonium (Pelargonium × hortorum L.H. Bailey) to long-term salinity stress induced by treatment with different NaCl doses

Acta Physiologiae Plantarum ◽

10.1007/s11738-015-2048-8 ◽

2015 ◽

Vol 38 (1) ◽

Cited By ~ 7

Author(s):

Włodzimierz Breś ◽

Hanna Bandurska ◽

Agnieszka Kupska ◽

Justyna Niedziela ◽

Barbara Frąszczak

Keyword(s):

Salinity Stress

Download Full-text

Identification and Characterization of Chromosome Regions Associated With Salinity Tolerance in Rice

Journal of Agricultural Science ◽

10.5539/jas.v10n11p57 ◽

2018 ◽

Vol 10 (11) ◽

pp. 57

Author(s):

Nguyen Thi Thu Thuy ◽

Misato Tokuyasu ◽

Nguyen Sao Mai ◽

Yoshihiko Hirai

Keyword(s):

Plant Growth ◽

Salinity Stress ◽

Salinity Tolerance ◽

World Population ◽

Chromosome 2 ◽

Substitution Lines ◽

Chromosome Segment Substitution Lines ◽

Panicle Number ◽

Segment Substitution

Rice, the major crop sustaining approximately half the world population, has been extensively reported to be sensitive to saline conditions. However, the genetic and physiological understanding related to long-term salinity stress remains unclear so far. The aim of this study was to evaluate the mechanisms of salinity tolerance in a salinity-tolerant variety of rice, Nona Bokra, and to detect the chromosomal regions responsible for it. We utilized chromosome segment substitution lines (CSSLs) carrying segments from Nona Bokra in the genetic background of a salt-sensitive variety Koshihikari by investigating the plant growth, grain productivity, and ion contents in plants subjected to long-term salinity stress. Comparison of plant growth and grain yield of CSSLs grown under long-term saline conditions suggests that the salinity tolerance of Nona Bokra involves the improvement of plant dry matter, panicle number, and percentage of ripened grains. Nona Bokra has the chromosomal regions for the improvement of the panicle number on chromosome 2 and the percentage of ripened grains on chromosome 6 or 10 under salinity conditions. It was suggested that these chromosomal regions were related to Na+ and Cl- exclusion. Low Na+ and Cl- contents in whole plant at full heading stage would be vital for improving the yield under long-term saline conditions.

Download Full-text

Antioxidant responses of peanut (Arachis hypogaea L.) seedlings to prolonged salt-induced stress

Archives of Biological Sciences ◽

10.2298/abs150407107k ◽

2015 ◽

Vol 67 (4) ◽

pp. 1303-1312 ◽

Cited By ~ 6

Author(s):

Musa Kavas ◽

Oya Akça ◽

Ufuk Akçay ◽

Begüm Peksel ◽

Seçkin Eroğlu ◽

...

Keyword(s):

Salinity Stress ◽

Growth Parameters ◽

Ion Leakage ◽

Stress Growth ◽

Salt Treatment ◽

Antioxidant Responses ◽

Stress Protection ◽

Arachis Hypogaea L ◽

Leaf Tissues

In this study, the effects of long-term NaCl treatment were investigated in two cultivars of peanut designated as drought-resistant and drought-sensitive. Growth parameters, changes in the concentrations of MDA, H2O2 and proline, and the activities of antioxidant enzymes were determined under salinity stress. Growth parameters indicated the superiority of cv. Florispan to cv. Gazipa?a under milder salinity stress treatment. However, comparative analysis of the two cultivars showed that MDA, H2O2, ion leakage levels and photosystem II activities were not significantly different, except for the proline activity, which increased only in Florispan leaf tissues under 100 mM salt treatment. Among the processes that govern the tolerance in peanut tissues, proline level and the activity of glutathione reductase (GR) appeared to be only components that play an important part in salt stress protection.

Download Full-text