Salt stress reduces root water uptake in barley ( Hordeum vulgare L.) through modification of the transcellular transport path

2020 ◽  
Author(s):  
Thorsten Knipfer ◽  
Mathieu Danjou ◽  
Charles Vionne ◽  
Wieland Fricke
Keyword(s):  
Salt Stress ◽  
Hordeum Vulgare ◽  
Water Uptake ◽  
Root Water Uptake ◽  
Hordeum Vulgare L ◽  
Transcellular Transport ◽  
Transport Path

Sensitivity and uncertainty analysis of the HYDRUS-1D model for root water uptake in saline soils

2018 ◽  
Vol 69 (2) ◽  
pp. 163 ◽  
Author(s):  
Wenzhi Zeng ◽  
Guoqing Lei ◽  
Yuanyuan Zha ◽  
Yuanhao Fang ◽  
Jingwei Wu ◽  
...  
Keyword(s):  
Salt Stress ◽  
Water Uptake ◽  
Soil Salinity ◽  
Root Water Uptake ◽  
Stress Factors ◽  
Saline Soils ◽  
Growth Stages ◽  
1D Model ◽  
Maximum Root ◽  
Hydrus 1D

A variance-based global sensitivity analysis (extended Fourier amplitude sensitivity test, EFAST) was applied to the Feddes module of the HYDRUS-1D model, and the sensitivity indices including both main and total effects of actual root water uptake (RWUa) to seven Feddes parameters were quantified at different growth stages of sunflower (Helianthus annuus L.): seedling, bud, flowering and maturity. The effects of soil salinity, climate conditions, and crop root growth on parameter sensitivity were explored by analysing three precipitation frequencies and two maximum root depths across four field locations with different soil salinity levels in China’s sunflower-growing regions. Uncertainties for RWUa were evaluated at four stages with varying Feddes parameters for different field locations, precipitation frequencies and maximum root depths. We found that the water stress factor concerning ceasing root water uptake (h4), and two salt stress factors ht and Sp, indicating the salinity threshold and the slope of the curve determining the fractional decline in root water uptake per unit increase in salinity below the threshold, respectively, were three most important Feddes parameters for RWUa estimation in HYDRUS-1D. In addition, the effects of soil salinity and precipitation frequencies were stronger than maximum root depth on the order of the parameters’ impacts on RWUa. Our study suggested that h1, h2, h3h, and h3l might be determined by an economical method (e.g. literature review) in saline soils with limited observations, but it is better to calibrate wilting point (h4) and salt stress parameters (ht and Sp) based on local measurements.

scholarly journals Genetic Variation and Alleviation of Salinity Stress in Barley (Hordeum vulgare L.)

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2488 ◽  
Author(s):  
Mohamed El-Esawi ◽  
Ibrahim Alaraidh ◽  
Abdulaziz Alsahli ◽  
Hayssam Ali ◽  
Aisha Alayafi ◽  
...  
Keyword(s):  
Salt Stress ◽  
Hordeum Vulgare ◽  
The Netherlands ◽  
European Region ◽  
Eastern European ◽  
Hordeum Vulgare L ◽  
Major Cluster ◽  
Pigment Contents ◽  
Western European ◽  
Barley Genotypes

Barley (Hordeum vulgare L.) represents one of the most important cereals cultivated worldwide. Investigating genetic variability and structure of barley is important for enhancing the crop productivity. This study aimed to investigate the diversity and structure of 40 barley genotypes originated from three European countries (France, the Netherlands, Poland) using amplified fragment length polymorphisms (AFLPs). It also aimed to study 5-aminolevulinic acid (ALA) effect on salinity tolerance of six barley genotypes. The expected heterozygosity (He) diverged from 0.126 to 0.501, with a mean of 0.348. Polymorphic information content (PIC) diverged from 0.103 to 0.482 across barley genotypes, with a mean of 0.316, indicating that barley genotypes are rich in a considerable level of genetic diversity. The 40 barley genotypes were further studied based on their geographical origin (Western Europe and Eastern Europe). The Eastern European region (Poland) has a higher barley variability than the Western European region (France and the Netherlands). Nei’s distance-based cluster tree divided the 40 barley accessions into two major clusters; one cluster comprised all the varieties originated from the Eastern European region, while the other major cluster included all accessions originated from the Western European region. Structure analysis results were in a complete concordance with our cluster analysis results. Slaski 2, Damseaux and Urbanowicki genotypes have the highest diversity level, whereas Carmen, Bigo and Cambrinus genotypes have the lowest level. The response of these six varieties to NaCl stress was also investigated. Salt stress (100 mM NaCl) slightly decreased levels of chlorophyll, carotenoid and osmolytes (proteins, soluble sugars, phenolics and flavonoids) in the leaves of Slaski 2, Damseaux and Urbanowicki genotypes at non-significant level, as compared to control samples. However, pigment contents and osmolytes in leaves of Carmen, Bigo and Cambrinus genotypes were significantly decreased by salt stress. Antioxidant enzyme activities were significantly increased in Slaski 2 genotype, but non-significantly increased in Carmen by salt stress. Priming Slaski 2 and Carmen cultivars with ALA under salt stress significantly induced pigment contents, antioxidants enzymes activity and stress-responsive genes expression, relative to NaCl-stressed plants. In conclusion, this study suggested a correlation between variability percentage and degree of salinity resistance. ALA improved salt tolerance in barley.

ROOT DISTRIBUTION OF AND WATER UPTAKE BY FIELD-GROWN BARLEY IN A BLACK SOLOD

1988 ◽  
Vol 68 (2) ◽  
pp. 425-432 ◽  
Author(s):  
Y. K. SOON
Keyword(s):  
Hordeum Vulgare ◽  
Root Growth ◽  
Water Uptake ◽  
Root Length ◽  
Root Length Density ◽  
Spring Barley ◽  
Grain Filling ◽  
Soil Drought ◽  
Hordeum Vulgare L ◽  
Uptake Rates

A field study was conducted in 1984 and 1985 to determine the spatial distribution with time of root length density of spring barley (Hordeum vulgare L.) growing in a Black Solod in northwestern Alberta. The weakly solonetzic Bnt horizon present in the solodic soil appeared not to inhibit root growth, and roots were present to 90 cm depth of soil. Drought in 1985 reduced root growth in general, and in particular in the surface soil (0 – 15 cm depth) between crop rows. Root growth in both years continued well after ear emergence and attained a maximum total length (14.5 and 9.5 km m−2 in 1984 and 1985, respectively) some time into grain-filling. Water uptake rates of up to 1.3 cm3 m−1 d−1 were observed; this maximum rate was associated with younger roots in the 60- to 90-cm depth in 1984. Low availability of subsoil water in 1985, however, resulted in low root density and water uptake rates in the 60- to 90-cm depth. The weighted mean uptake rate for the entire root system was slightly more than 0.4 cm3 m−1 d−1 in 1984 and about half that in 1985. Key words: Barley, Hordeum vulgare L., solonetzic soil, water inflow, root growth, root length density

scholarly journals Paradox of plant growth promotion potential of rhizobacteria and their actual promotion effect on growth of barley (Hordeum vulgare L.) under salt stress

2015 ◽  
Vol 181 ◽  
pp. 22-32 ◽  
Author(s):  
Massimiliano Cardinale ◽  
Stefan Ratering ◽  
Christian Suarez ◽  
Ana Maria Zapata Montoya ◽  
Rita Geissler-Plaum ◽  
...  
Keyword(s):  
Salt Stress ◽  
Hordeum Vulgare ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Hordeum Vulgare L ◽  
Promotion Effect ◽  
Effect On Growth
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