Strigolactone GR24 improves cadmium tolerance by regulating cadmium uptake, nitric oxide signaling and antioxidant metabolism in barley (Hordeum vulgare L.)

Qiu, Cheng‐Wei; Zhang, Can; Wang, Nianhong; Mao, Weihua; Wu, Feibo

doi:10.1016/j.envpol.2021.116486

Cited by 69 publications

(36 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The application of GR24 reduced the MDA and H 2 O 2 contents in tomato plants under low‐light stress and alleviated photosystem injuries induced by excess light energy and ROS (Lu et al ., 2019). Moreover, 1 mμM GR24 markedly reduced the accumulation of 10 mM Cd‐induced H 2 O 2 and MDA in barley and protected plants from toxic oxidation (Qiu et al ., 2021). However, the role of GR24 on fruit postharvest senescence induced by excessive ROS is still unclear.…”

Section: Discussionmentioning

confidence: 99%

“…The GSH is transformed to oxidative glutathione disulfide and then reduced to GSH by GR (Garcia‐Caparros et al ., 2020). In the Cd‐threatened barley plants, exogenous GR24 markedly increased GSH and AsA pools and the activity of APX, GR, and dehydroascorbic acid reductase (Qiu et al ., 2021). In the salt‐treated sunflower, GR24 improved the enzymatic activity of SOD, CAT, and POD by 38.1%, 67.87%, and 124.01%, respectively (Zulfiqar et al ., 2020).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of an exogenous strigolactone GR24 on the antioxidant capacity and quality deterioration in postharvest sweet orange fruit stored at ambient temperature

Lin

Zhan

et al. 2021

Int J of Food Sci Tech

View full text Add to dashboard Cite

Quality deterioration and senescence are the main causes of loss of fruit postharvest. Here, the effects of 200 lmol L À1 strigolactone GR24 on the physicochemical characters, organoleptic quality, and antioxidant capacity of postharvest orange fruit were studied. GR24 increased fruit firmness (9.2%), citrus color index (22.34%), titratable acidity (11.7%), total soluble solid (13.13%), and soluble sugar content (8.17%) irrespective of the rates of weight loss (1.22%) and respiration (24.13%), indicating an improvement in organoleptic quality. GR24 also decreased the accumulation of hydrogen peroxide (30.08%) and malondialdehyde (27.59%), but increased the levels of antioxidants (ascorbate, glutathione, and total phenol) and enzyme activities (catalase, ascorbate peroxidase, and glutathione reductase), indicating an enhancement in antioxidant capacity. Moreover, GR24 delayed fruit senescence process by stimulating the boost of the antioxidant system during 0-63 days and delaying the quality deterioration at 77-91 days.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of an exogenous strigolactone GR24 on the antioxidant capacity and quality deterioration in postharvest sweet orange fruit stored at ambient temperature

Lin

Zhan

et al. 2021

Int J of Food Sci Tech

View full text Add to dashboard Cite

show abstract

“…SLs positively regulate plant height, leaf senescence, stem thickness, root hair elongation and primary root length, whereas they negatively affect shoot gravitropism and branching, adventitious rooting and lateral root development under normal growth conditions [1,7]. Various loss-of-function studies have used SL-related mutants and synthetic GR24 to demonstrate that SLs played crucial regulatory roles in plant responses to environmental perturbations [10][11][12][13]. For example, SLdeficient Arabidopsis (Arabidopsis thaliana) and rice mutants, and SL-depleted transgenic Lotus japonicus and tomato (Solanum lycopersicum) lines showed higher susceptibility to drought than their respective wild-type (WT) plants [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…SL-mediated positive effects on plant tolerance to abiotic stresses mainly pertain to the regulation of various physiological and biochemical processes, including photosynthetic efficiency, leaf senescence, cell wall biogenesis, stomatal closure, flavonoid production, antioxidant defense and nutrient homeostasis [1]. Recently, Qiu et al [11] reported that GR24 application improved cadmium (Cd) toxicity tolerance in contrasting barley (Hordeum vulgare) genotypes by inhibiting Cd uptake, balancing nutrient levels, and activating reactive oxygen species (ROS)-scavenging systems. Although this study pinpoints the likely involvement of SLs in heavy metal tolerance, the genetic and molecular insights into crop tolerance to excessive metal stresses are still obscure.…”

Section: Introductionmentioning

confidence: 99%

Strigolactones Modulate Cellular Antioxidant Defense Mechanisms to Mitigate Arsenate Toxicity in Rice Shoots

Mostofa

Rahman

et al. 2021

Antioxidants

View full text Add to dashboard Cite

Metalloid contamination, such as arsenic poisoning, poses a significant environmental problem, reducing plant productivity and putting human health at risk. Phytohormones are known to regulate arsenic stress; however, the function of strigolactones (SLs) in arsenic stress tolerance in rice is rarely investigated. Here, we investigated shoot responses of wild-type (WT) and SL-deficient d10 and d17 rice mutants under arsenate stress to elucidate SLs’ roles in rice adaptation to arsenic. Under arsenate stress, the d10 and d17 mutants displayed severe growth abnormalities, including phenotypic aberrations, chlorosis and biomass loss, relative to WT. Arsenate stress activated the SL-biosynthetic pathway by enhancing the expression of SL-biosynthetic genes D10 and D17 in WT shoots. No differences in arsenic levels between WT and SL-biosynthetic mutants were found from Inductively Coupled Plasma-Mass Spectrometry analysis, demonstrating that the greater growth defects of mutant plants did not result from accumulated arsenic in shoots. The d10 and d17 plants had higher levels of reactive oxygen species, water loss, electrolyte leakage and membrane damage but lower activities of superoxide dismutase, ascorbate peroxidase, glutathione peroxidase and glutathione S-transferase than did the WT, implying that arsenate caused substantial oxidative stress in the SL mutants. Furthermore, WT plants had higher glutathione (GSH) contents and transcript levels of OsGSH1, OsGSH2, OsPCS1 and OsABCC1 in their shoots, indicating an upregulation of GSH-assisted arsenic sequestration into vacuoles. We conclude that arsenate stress activated SL biosynthesis, which led to enhanced arsenate tolerance through the stimulation of cellular antioxidant defense systems and vacuolar sequestration of arsenic, suggesting a novel role for SLs in rice adaptation to arsenic stress. Our findings have significant implications in the development of arsenic-resistant rice varieties for safe and sustainable rice production in arsenic-polluted soils.

show abstract

“…We found significant decreases in chlorophyll and carotenoid contents and an increase in anthocyanins in the leaves of CCD7M14 as compared to the WT F01 line (Table 2). Exogenous application of the synthetic SL GR24 under stress conditions has been shown to control chlorophyll degradation and maintain the photosynthetic rate [56][57][58][59]. On the other hand, chlorophyll content in sunflower leaves was not influenced by GR24 treatment of achene pre-sowing, but carotenoid content increased [60].…”

Section: Discussionmentioning

confidence: 99%

Characterization of a Chickpea Mutant Resistant to Phelipanche aegyptiaca Pers. and Orobanche crenata Forsk

Galili

Hershenhorn

Smirnov

et al. 2021

Plants

View full text Add to dashboard Cite

Chickpea (Cicer arietinum L.) is a major pulse crop in Israel grown on about 3000 ha spread, from the Upper Galilee in the north to the North-Negev desert in the south. In the last few years, there has been a gradual increase in broomrape infestation in chickpea fields in all regions of Israel. Resistant chickpea cultivars would be simple and effective solution to control broomrape. Thus, to develop resistant cultivars we screened an ethyl methanesulfonate (EMS) mutant population of F01 variety (Kabuli type) for broomrape resistance. One of the mutant lines (CCD7M14) was found to be highly resistant to both Phelipanche aegyptiaca and Orobanche crenata. The resistance mechanism is based on the inability of the mutant to produce strigolactones (SLs)—stimulants of broomrape seed germination. LC/MS/MS analysis revealed the SLs orobanchol, orobanchyl acetate, and didehydroorobanchol in root exudates of the wild type, but no SLs could be detected in the root exudates of CCD7M14. Sequence analyses revealed a point mutation (G-to-A transition at nucleotide position 210) in the Carotenoid Cleavage Dioxygenase 7 (CCD7) gene that is responsible for the production of key enzymes in the biosynthesis of SLs. This nonsense mutation resulted in a CCD7 stop codon at position 70 of the protein. The influences of the CCD7M14 mutation on chickpea phenotype and chlorophyll, carotenoid, and anthocyanin content were characterized.

show abstract

Strigolactone GR24 improves cadmium tolerance by regulating cadmium uptake, nitric oxide signaling and antioxidant metabolism in barley (Hordeum vulgare L.)

Cited by 69 publications

References 80 publications

Effect of an exogenous strigolactone GR24 on the antioxidant capacity and quality deterioration in postharvest sweet orange fruit stored at ambient temperature

Effect of an exogenous strigolactone GR24 on the antioxidant capacity and quality deterioration in postharvest sweet orange fruit stored at ambient temperature

Strigolactones Modulate Cellular Antioxidant Defense Mechanisms to Mitigate Arsenate Toxicity in Rice Shoots

Characterization of a Chickpea Mutant Resistant to Phelipanche aegyptiaca Pers. and Orobanche crenata Forsk

Contact Info

Product

Resources

About