Synergistic interplay between Azospirillum brasilense and exogenous signaling molecule H2S promotes Cd stress resistance and growth in pak choi (Brassica chinensis L.)

Cui, Qingliang; Liu, Dongdong; Chen, Hansong; Qiu, Tianyi; Zhao, Shufen; Duan, Chengjiao; Cui, Yongxing; Zhu, Xiaozhen; Chao, Herong; Wang, Yuhan; Wang, Jie; Fang, Linchuan

doi:10.1016/j.jhazmat.2022.130425

Cited by 15 publications

(4 citation statements)

References 50 publications

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“…It has been shown that bacteria from the genus Azospirillum, alone or in combination with another rhizosphere bacterium, Bacillus subtilis, are able to reduce cadmium toxicity for arabidopsis, pakchoi, and barley [26][27][28][29]. A decrease in the concentration of cadmium in plants and an increase in the biomass of shoots occurred due to an increase in the concentration of abscisic acid (ABA) [26,27,29]. The action of ABA was mediated through Heavy metals, such as iron, arsenic, copper, cadmium, zinc, and lead, have negative effects on plant growth and vitality.…”

Section: Heavy Metal Pollutionmentioning

confidence: 99%

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Molecular Mechanisms Determining the Role of Bacteria from the Genus Azospirillum in Plant Adaptation to Damaging Environmental Factors

Gureeva

Gureev

2023

IJMS

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Agricultural plants are continuously exposed to environmental stressors, which can lead to a significant reduction in yield and even the death of plants. One of the ways to mitigate stress impacts is the inoculation of plant growth-promoting rhizobacteria (PGPR), including bacteria from the genus Azospirillum, into the rhizosphere of plants. Different representatives of this genus have different sensitivities or resistances to osmotic stress, pesticides, heavy metals, hydrocarbons, and perchlorate and also have the ability to mitigate the consequences of such stresses for plants. Bacteria from the genus Azospirillum contribute to the bioremediation of polluted soils and induce systemic resistance and have a positive effect on plants under stress by synthesizing siderophores and polysaccharides and modulating the levels of phytohormones, osmolytes, and volatile organic compounds in plants, as well as altering the efficiency of photosynthesis and the antioxidant defense system. In this review, we focus on molecular genetic features that provide bacterial resistance to various stress factors as well as on Azospirillum-related pathways for increasing plant resistance to unfavorable anthropogenic and natural factors.

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Section: Heavy Metal Pollutionmentioning

confidence: 99%

“…The action of ABA was mediated through IRT1 (IRON-REGULATED TRANSPORTER 1) [26]. A decrease in the level of cadmium toxicity for plants could also be due to a decrease in oxidative stress and an increase in the activity of antioxidant enzymes [29].…”

Section: Heavy Metal Pollutionmentioning

confidence: 99%

Molecular Mechanisms Determining the Role of Bacteria from the Genus Azospirillum in Plant Adaptation to Damaging Environmental Factors

Gureeva

Gureev

2023

IJMS

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“…This redox imbalance results in accelerated lipid peroxidation changing plasma membrane fluidity and permeability, and degrading functional biomolecules (e.g., chlorophylls, proteins, RNA, DNA), so plants need to maintain a balance between scavenging and ROS generation [7,8]. To alleviate oxidative stress, plants usually adopt various defense systems, includes activation of efficient antioxidant defense system [9][10][11]. For instance, plants usually produce various antioxidant enzymes, superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX), which can alleviate the ROS toxicity [6,12].…”

Section: Introductionmentioning

confidence: 99%

Conjoint analysis of physio-biochemical, transcriptomic, and metabolomic reveals the response characteristics of solanum nigrum L. to cadmium stress

Wang,

Chen,

Chu

et al. 2024

BMC Plant Biol

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Cadmium (Cd) is a nonessential element in plants and has adverse effects on the growth and development of plants. However, the molecular mechanisms of Cd phytotoxicity, tolerance and accumulation in hyperaccumulators Solanum nigrum L. has not been well understood. Here, physiology, transcriptome, and metabolome analyses were conducted to investigate the influence on the S. nigrum under 0, 25, 50, 75 and 100 µM Cd concentrations for 7 days. Pot experiments demonstrated that compared with the control, Cd treatment significantly inhibited the biomass, promoted the Cd accumulation and translocation, and disturbed the balance of mineral nutrient metabolism in S. nigrum, particularly at 100 µM Cd level. Moreover, the photosynthetic pigments contents were severely decreased, while the content of total protein, proline, malondialdehyde (MDA), H2O2, and antioxidant enzyme activities generally increased first and then slightly declined with increasing Cd concentrations, in both leaves and roots. Furthermore, combined with the previous transcriptomic data, numerous crucial coding-genes related to mineral nutrients and Cd ion transport, and the antioxidant enzymes biosynthesis were identified, and their expression pattern was regulated under different Cd stress. Simultaneously, metabolomic analyses revealed that Cd treatment significantly changed the expression level of many metabolites related to amino acid, lipid, carbohydrate, and nucleotide metabolism. Metabolic pathway analysis also showed that S. nigrum roots activated some differentially expressed metabolites (DEMs) involved in energy metabolism, which may enhance the energy supply for detoxification. Importantly, central common metabolism pathways of DEGs and DEMs, including the “TCA cycle”, “glutathione metabolic pathway” and “glyoxylate and dicarboxylate metabolism” were screened using conjoint transcriptomics and metabolomics analysis. Our results provide some novel evidences on the physiological and molecular mechanisms of Cd tolerance in hyperaccumulator S. nigrum plants.

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“…H 2 S is widely regarded as a third gas transmitter molecule, in addition to nitric oxide (NO) and carbon monoxide (CO). Researchers have found that H 2 S plays prominent multifunctional roles in mediating the various physiological processes and stress responses of plants, such as stomatal movement, leaf senescence, seed germination, root organogenesis, photosynthesis, fruit ripening, and nitrogen fixation [11,12]. Moreover, it was demonstrated that H 2 S, supplied with an exogenous NaHS donor, improves the tolerance of plants to aluminum (Al), chromium (Cr), lead (Pb), and Cd [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Sulfide Alleviates Cadmium Stress by Enhancing Photosynthetic Efficiency and Regulating Sugar Metabolism in Wheat Seedlings

Zheng

Zhang

et al. 2023

Plants

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Hydrogen sulfide (H2S) plays prominent multifunctional roles in the mediation of various physiological processes and stress responses to plants. In this study, hydroponic experiments were carried out to explore the effects of NaHS pretreatment on the growth of wheat (Triticum aestivum L.) under 50 μM cadmium (Cd). Compared with Cd treatment alone, 50 μM NaHS pretreatment increased the plant height, soluble sugar content of shoots and roots, and dry weight of shoots and roots under Cd stress, while the Cd concentration of shoots and roots was significantly reduced by 18.1% and 25.9%, respectively. Meanwhile, NaHS pretreatment protected the photosynthetic apparatus by increasing the net photosynthetic rate and PSII electron transportation rate of wheat leaves under Cd stress. NaHS pretreatment significantly increased the soluble sugar content to maintain the osmotic pressure balance of the leaf cells. The gene expression results associated with photosynthetic carbon assimilation and sucrose synthesis in wheat leaves suggested that the NaHS pretreatment significantly up-regulated the expression of TaRBCL, TaRBCS, and TaPRK, while it down-regulated the expression of TaFBA, TaSuSy, TaSAInv, and TaA/NInv. In summary, NaHS pretreatment improved the resistance of wheat seedlings under Cd stress by increasing the rate of photosynthesis and regulating the expression of genes related to sugar metabolism.

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Synergistic interplay between Azospirillum brasilense and exogenous signaling molecule H2S promotes Cd stress resistance and growth in pak choi (Brassica chinensis L.)

Cited by 15 publications

References 50 publications

Molecular Mechanisms Determining the Role of Bacteria from the Genus Azospirillum in Plant Adaptation to Damaging Environmental Factors

Molecular Mechanisms Determining the Role of Bacteria from the Genus Azospirillum in Plant Adaptation to Damaging Environmental Factors

Conjoint analysis of physio-biochemical, transcriptomic, and metabolomic reveals the response characteristics of solanum nigrum L. to cadmium stress

Hydrogen Sulfide Alleviates Cadmium Stress by Enhancing Photosynthetic Efficiency and Regulating Sugar Metabolism in Wheat Seedlings

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