Combined effect of Cr-toxicity and temperature rise on physiological and biochemical responses of Atriplex halimus L.

Mesnoua, Mohammed; Mateos‐Naranjo, Enrique; Pérez-Romero, Jesús Alberto; Barcia-Piedras, José-María; Lotmani, Brahim; Redondo‐Gómez, Susana

doi:10.1016/j.plaphy.2018.08.025

Cited by 7 publications

(9 citation statements)

References 42 publications

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“…angustifolia, which is a drought-tolerant shrub, or A. lentiformis, which can live in seawater irrigation and xeric conditions [24]. Atriplex species could serve as tools for the phytoremediation of polluted, arid, or semi-arid soils [22,[25][26][27] or as forage species [27][28][29]. Among them, Atriplex halimus L. is one of the most planted Atriplex species worldwide [22], and therefore represents one of the most important species within this genus.…”

Section: Introductionmentioning

confidence: 99%

Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in Atriplex halimus

Pérez-Romero

Mateos‐Naranjo

López‐Jurado

et al. 2020

Plants

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Many halophytic physiological traits related to the tolerance of plants to salinity excess have been extensively studied, with a focus on biomass and/or gas exchange parameters. To gain a more complete understanding of whether salinity excess affects the physiological performance of halophytes, an experiment was performed using the halophyte Atriplex halimus L. as a model. A. halimus plants were subjected to two salinity treatments (171 and 513 mM NaCl) over 60 days in a controlled environment. After this period, dry biomass, specific stem conductivity, water potential at turgor loss point, osmotic potential, gas exchange parameters, and the fluorescence of chlorophyll a derived parameters were assessed in order to obtain knowledge about the differences in vulnerability that these parameters can show when subjected to salinity stress. Our results showed a decrease in belowground and aboveground biomass. The decrement in biomass seen at 513 mM NaCl was related to photosynthetic limitations and specific stem conductivity. Turgor loss point did not vary significantly with the increment of salinity. Therefore, the parameter that showed less vulnerability to saline stress was the turgor loss point, with only a 5% decrease, and the more vulnerable trait was the stem conductivity, with a reduction of nearly 50%.

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Section: Introductionmentioning

confidence: 99%

Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in Atriplex halimus

Pérez-Romero

Mateos‐Naranjo

López‐Jurado

et al. 2020

Plants

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“…Abundant literature is being produced on the positive effect of inoculation with metallo-resistant bacteria on plants cultivated under metal stress. For instance, cultivation of Atriplex halimus and Arthrocnemum macrostachyum in sediment polluted with heavy metals showed a reduction in chlorophyll florescence and gas exchange, while inoculation with bacteria improve them [27,34,61]. Multiple mechanisms account for this effect, since bacteria can enhance plant nutrition through phosphate solubilization, iron acquisition, nitrogen fixation, etc.…”

Section: Discussionmentioning

confidence: 99%

Safe Cultivation of Medicago sativa in Metal-Polluted Soils from Semi-Arid Regions Assisted by Heat- and Metallo-Resistant PGPR

et al. 2019

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Soil contamination with heavy metals is a constraint for plant establishment and development for which phytoremediation may be a solution, since rhizobacteria may alleviate plant stress under these conditions. A greenhouse experiment was conducted to elucidate the effect of toxic metals on growth, the activities of ROS (reactive oxygen species)-scavenging enzymes, and gene expression of Medicago sativa grown under different metal and/or inoculation treatments. The results showed that, besides reducing biomass, heavy metals negatively affected physiological parameters such as chlorophyll fluorescence and gas exchange, while increasing ROS-scavenging enzyme activities. Inoculation of M. sativa with a bacterial consortium of heat- and metallo-resistant bacteria alleviated metal stress, as deduced from the improvement of growth, lower levels of antioxidant enzymes, and increased physiological parameters. The bacteria were able to effectively colonize and form biofilms onto the roots of plants cultivated in the presence of metals, as observed by scanning electron microscopy. Results also evidenced the important role of glutathione reductase (GR), phytochelatin synthase (PCS), and metal transporter NRAMP1 genes as pathways for metal stress management, whereas the gene coding for cytochrome P450 (CP450) seemed to be regulated by the presence of the bacteria. These outcomes showed that the interaction of metal-resistant rhizobacteria/legumes can be used as an instrument to remediate metal-contaminated soils, while cultivation of inoculated legumes on these soils is still safe for animal grazing, since inoculation with bacteria diminished the concentrations of heavy metals accumulated in the aboveground parts of the plants to below toxic levels.

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“…The use of biologicals based on plant growth-promoting rhizobacterial (PGPR) strains of the genus of Rizobium leguminosarum , demonstrating beneficial properties of plants, is of interest. They can be successful symbionts for various plant species [ 10 , 11 , 12 , 13 , 14 , 15 ]. The presence of the bacteria R. leguminosarum can regulate in plants such processes as the increased associative fixation of molecular nitrogen [ 1 , 15 , 16 ], additional production of physiologically active compounds, including phytohormones [ 8 , 16 ], and improvement of the water regime of plants [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…The application of PGPR is a sustainable approach to improving the physiological processes of crops and overcoming abiotic stresses. The effectiveness of the use of a particular bacterial preparation is often related to a particular crop, and this does not guarantee a positive effect on another crop or variety [ 10 , 11 , 12 , 13 , 14 , 16 ]. The maximum effect from the use of associative strains can be obtained only based on a careful selection of strains that have a greater positive effect on a particular culture.…”

Section: Introductionmentioning

confidence: 99%

“…In order to increase the resistance of plants to Cd, plants are treated with microbial growth regulators [ 1 ]. The use of PGPR effectively reduces the level of the negative effects of Cd on plants [ 10 , 11 , 12 , 13 , 14 , 15 ]. It was found that strains of the genus of Rhizobium leguminosarum , i.e., the rhizospheric bacterial strains Pvu5 (isolated from Phaseolus vulgaris ), VSy12 ( Vicia sylvatica ), Thy2 ( Trifolium hybridium ), and TPr4 ( T. pratense ), stimulated the growth of roots of cucumber seedlings [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Rhizobium leguminosarum Thy2 on the Growth and Tolerance to Cadmium Stress of Wheat Plants

Maslennikova

Nasyrova

Chubukova

et al. 2022

Life

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Cadmium (Cd) stress is an obstacle for crop production, quality crops, and sustainable agriculture. An important role is played by the application of eco-friendly approaches to improve plant growth and stress tolerance. In the current study, a pre-sowing seed treatment with Rhizobium leguminosarum strains, isolated from the leguminous plants Phaseolus vulgaris (strain Pvu5), Vicia sylvatica (strain VSy12), Trifolium hybridium (strain Thy2), and T. pratense (strain TPr4), demonstrated different effects on wheat (Triticum aestivum L.) plant growth under normal conditions. Among all tested strains, Thy2 significantly increased seed germination, seedling length, fresh and dry biomass, and leaf chlorophyll (Chl) content. Further analysis showed that Thy2 was capable of producing indole-3-acetic acid and siderophores and fixing nitrogen. Under Cd stress, Thy2 reduced the negative effect of Cd on wheat growth and photosynthesis and had a protective effect on the antioxidant system. This was expressed in the additional accumulation of glutathione and proline and the activation of glutathione reductase. In addition, Thy2 led to a significant reduction in oxidative stress, which was evidenced by the data on the stabilization of the ascorbate content and the activity of ascorbate peroxidase. In addition, Thy2 markedly reduced Cd-induced membrane lipid peroxidation and electrolyte leakage in the plants. Thus, the findings demonstrated the ability of the R. leguminosarum strain Thy2, isolated from T. hybridium nodules, to exert a growth-promoting and anti-stress effect on wheat plants. These results suggest that the Thy2 strain may enhance wheat plant growth by mitigating Cd stress, particularly through improving photosynthesis and antioxidant capacity and reducing the severity of oxidative damage. This may provide a basic and biological approach to use the Thy2 strain as a promising, eco-friendly candidate to combat Cd stress in wheat production.

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Combined effect of Cr-toxicity and temperature rise on physiological and biochemical responses of Atriplex halimus L.

Cited by 7 publications

References 42 publications

Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in Atriplex halimus

Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in Atriplex halimus

Safe Cultivation of Medicago sativa in Metal-Polluted Soils from Semi-Arid Regions Assisted by Heat- and Metallo-Resistant PGPR

Effects of Rhizobium leguminosarum Thy2 on the Growth and Tolerance to Cadmium Stress of Wheat Plants

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