Role of Jasmonates, Calcium, and Glutathione in Plants to Combat Abiotic Stresses Through Precise Signaling Cascade

Aslam, Saima; Gul, Nadia; Mir, Mudasir Ahmad; Asgher, Mohd; Al-Sulami, Nadiah; Abulfaraj, Aala A.; Qari, Sameer H.

doi:10.3389/fpls.2021.668029

Cited by 38 publications

(15 citation statements)

References 383 publications

(412 reference statements)

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“…In addition, for peas under As toxicity, Rodríguez-Ruíz et al [ 95 ] describe decreases in the GSH and GSSG content in both roots and leaves. The decrease in GSH content may be due to its capacity to serve as a substrate for phytochelatins [ 95 ] which would subsequently act to chelate Sb, or to Sb’s capacity to bind either directly to GSH or through GST activity [ 130 ]. The greater decline in GSH content together with the increased GST activity observed in roots may, together with the strong increase in the coniferyl alcohol peroxidase activity, be the cause of the large accumulation of Sb that occurred in this organ.…”

Section: Discussionmentioning

confidence: 99%

Response to Antimony Toxicity in Dittrichia viscosa Plants: ROS, NO, H2S, and the Antioxidant System

et al. 2021

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Dittrichia viscosa plants were grown hydroponically with different concentrations of Sb. There was preferential accumulation of Sb in roots. Fe and Cu decreased, while Mn decreased in roots but not in leaves. Chlorophyll content declined, but the carotenoid content increased, and photosynthetic efficiency was unaltered. O2●− generation increased slightly, while lipid peroxidation increased only in roots. H2O2, NO, ONOO−, S-nitrosothiols, and H2S showed significant increases, and the enzymatic antioxidant system was altered. In roots, superoxide dismutase (SOD) and monodehydroascorbate reductase (MDAR) activities declined, dehydroscorbate reductase (DHAR) rose, and ascorbate peroxidase (APX), peroxidase (POX), and glutathione reductase (GR) were unaffected. In leaves, SOD and POX increased, MDAR decreased, and APX was unaltered, while GR increased. S-nitrosoglutathione reductase (GSNOR) and l-cysteine desulfhydrilase (l-DES) increased in activity, while glutathione S-transferase (GST) decreased in leaves but was enhanced in roots. Components of the AsA/GSH cycle decreased. The great capacity of Dittrichia roots to accumulate Sb is the reason for the differing behaviour observed in the enzymatic antioxidant systems of the two organs. Sb appears to act by binding to thiol groups, which can alter free GSH content and SOD and GST activities. The coniferyl alcohol peroxidase activity increased, possibly to lignify the roots’ cell walls. Sb altered the ROS balance, especially with respect to H2O2. This led to an increase in NO and H2S acting on the antioxidant system to limit that Sb-induced redox imbalance. The interaction NO, H2S and H2O2 appears key to the response to stress induced by Sb. The interaction between ROS, NO, and H2S appears to be involved in the response to Sb.

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Section: Discussionmentioning

confidence: 99%

Response to Antimony Toxicity in Dittrichia viscosa Plants: ROS, NO, H2S, and the Antioxidant System

et al. 2021

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“…Glutathione is a major plant antioxidant (Noriega et al, 2012 ; Aslam et al, 2021 ), and accumulation and redox status of GSH is associated with a plant's ability to tolerate stress through the GSH reduction of H 2 O 2 and reactive oxygen species when a plant is experiencing oxidative stress (Rausch et al, 2007 ). Additionally, Chen et al ( 2017 ) proposed a model for crosstalk through GSH-mediated redox and defense-related signaling pathways.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, Chen et al ( 2017 ) proposed a model for crosstalk through GSH-mediated redox and defense-related signaling pathways. While the exact contribution of GSH in JA signaling is unclear, upregulation of the JA pathway triggered by intracellular oxidation requires GSH accumulation (Han et al, 2013 ; Aslam et al, 2021 ). Plant defense hormones, including SA and JA, have been shown to regulate gene expression through H 2 O 2 (Mur et al, 2006 ), and exogenous application of SA to soybean cell suspensions increases GSH, providing a potential substrate for the indirect crosstalk with GSH.…”

Section: Discussionmentioning

confidence: 99%

Identification of Candidate Genes for a Major Quantitative Disease Resistance Locus From Soybean PI 427105B for Resistance to Phytophthora sojae

Karhoff

Vargas-Garcia²,

Lee³

et al. 2022

Front. Plant Sci.

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Phytophthora root and stem rot is a yield-limiting soybean disease caused by the soil-borne oomycete Phytophthora sojae. Although multiple quantitative disease resistance loci (QDRL) have been identified, most explain <10% of the phenotypic variation (PV). The major QDRL explaining up to 45% of the PV were previously identified on chromosome 18 and represent a valuable source of resistance for soybean breeding programs. Resistance alleles from plant introductions 427105B and 427106 significantly increase yield in disease-prone fields and result in no significant yield difference in fields with less to no disease pressure. In this study, high-resolution mapping reduced the QDRL interval to 3.1 cm, and RNA-seq analysis of near-isogenic lines (NILs) varying at QDRL-18 pinpointed a single gene of interest which was downregulated in inoculated NILs carrying the resistant allele compared to inoculated NILs with the susceptible allele. This gene of interest putatively encodes a serine–threonine kinase (STK) related to the AtCR4 family and may be acting as a susceptibility factor, based on the specific increase of jasmonic acid concentration in inoculated NILs. This work facilitates further functional analyses and marker-assisted breeding efforts by prioritizing candidate genes and narrowing the targeted region for introgression.

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“…In the course of evolution, plants have developed ubiquitous mechanisms responses to salt tolerance, such as increasing anti-oxidative systems, buildup of compatible compounds, ion balancing, and compartmentation of toxic ions ( Zhu, 2016 ). These specific strategies lead to the activation of signaling pathways to combat salinity stress by maintaining cellular homeostasis ( Aslam et al, 2021 ). Phytohormones, such as auxin, ethylene, and abscisic acid (ABA), are known to be actively involved in coping with salt stress, through adjustment of whole-plant metabolism ( Khan et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Mucilaginibacter sp. K Improves Growth and Induces Salt Tolerance in Nonhost Plants via Multilevel Mechanisms

Fan

Smith

2022

Front. Plant Sci.

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Soil salinity negatively modulates plant growth and development, contributing to severe decreases in the growth and production of crops. Mucilaginibacter sp. K is a root endophytic bacterium that was previously reported by our laboratory to stimulate growth and confer salt tolerance in Arabidopsis (Arabidopsis thaliana). The main purpose of the present study is to elucidate the physiological and molecular machinery responsible for the prospective salt tolerance as imparted by Mucilaginibacter sp. K. We first report that auxin, gibberellin, and MPK6 signalings were required for strain K-induced growth promotion and salt tolerance in Arabidopsis. Then, this strain was assessed as a remediation strategy to improve maize performance under salinity stress. Under normal growth conditions, the seed vigor index, nitrogen content, and plant growth were significantly improved in maize. After NaCl exposure, strain K significantly promoted the growth of maize seedlings, ameliorated decline in chlorophyll content and reduced accretion of MDA and ROS compared with the control. The possible mechanisms involved in salt resistance in maize could be the improved activities of SOD and POD (antioxidative system) and SPS (sucrose biosynthesis), upregulated content of total soluble sugar and ABA, and reduced Na+ accumulation. These physiological changes were then confirmed by induced gene expression for ion transportation, photosynthesis, ABA biosynthesis, and carbon metabolism. In summary, these results suggest that strain K promotes plant growth through increases in photosynthesis and auxin- and MPK6-dependent pathways; it also bestows salt resistance on plants through protection against oxidative toxicity, Na+ imbalance, and osmotic stress, along with the activation of auxin-, gibberellin-, and MPK6-dependent signaling pathways. This is the first detailed report of maize growth promotion by a Mucilaginibacter sp. strain from wild plant. This strain could be used as a favorable biofertilizer and a salinity stress alleviator for maize, with further ascertainment as to its reliability of performance under field conditions and in the presence of salt stress.

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Role of Jasmonates, Calcium, and Glutathione in Plants to Combat Abiotic Stresses Through Precise Signaling Cascade

Cited by 38 publications

References 383 publications

Response to Antimony Toxicity in Dittrichia viscosa Plants: ROS, NO, H2S, and the Antioxidant System

Response to Antimony Toxicity in Dittrichia viscosa Plants: ROS, NO, H2S, and the Antioxidant System

Identification of Candidate Genes for a Major Quantitative Disease Resistance Locus From Soybean PI 427105B for Resistance to Phytophthora sojae

Mucilaginibacter sp. K Improves Growth and Induces Salt Tolerance in Nonhost Plants via Multilevel Mechanisms

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