Harnessing the role of selenium in soil–plant-microbe ecosystem: ecophysiological mechanisms and future prospects

Khanna, Kanika; Kumar, Pankaj; Ohri, Puja; Bhardwaj, Renu

doi:10.1007/s10725-022-00830-z

Cited by 11 publications

(10 citation statements)

References 175 publications

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“…4,5,and 6). These results were consistent with the results of other studies (Duan et al 2011a, Jiang et al 2015, Dai and Tu, 2018 and soil pH may be affected by different concentrations of exogenous Se additions and showed a significant correlation with plant Se content (Table 3) (Khanna et al 2022).…”

Section: Resultssupporting

confidence: 92%

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Characteristics of Soil Selenium Enrichment And Its Effects on the Aboveground Parts Of Abelmoschus Manihot (L.) Medic

Ji¹,

Lin²,

Li³

et al. 2023

Bangladesh J. Bot.

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Pot experiments were carried out to study characteristics of soil selenium (Se) enrichment and its influence on Chinese medicinal plant Abelmoschus manihot, and selenium contents in aboveground parts of A. manihot under conditions of natural Se-rich, low soils and exogenous Se addition were analyzed. Results indicated that contents of total Se and various Se fractions of natural Se-rich soil were significantly higher than that of Se-low soil (P < 0.05), and Se content in aboveground parts of A. manihot grown in natural Serich soil was significantly higher than that in natural Se-low soil (P < 0.05). The Se content in aboveground parts of A. manihot increased with the increase of soil total Se content, soil pH and contents of various Se fractions, showing significant tolerance to high Se. Moreover, it was initially found that A. manihot could effectively absorb soil Se even in relatively low Se soil conditions (soil Se content of 0.11~0.12 mg/kg) and thus reaching the standard of Se-rich crops. Bangladesh J. Bot. 51(4): 961-970, 2022 (December) Special

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Section: Resultssupporting

confidence: 92%

“…6). The change of Se content of various forms in soil should be caused by the addition of different concentrations of exogenous Se (Table 3), and the variation of Se content in A. manihot might be caused by the change of soil available Se content (Khanna et al 2022).…”

Section: Resultsmentioning

confidence: 99%

Characteristics of Soil Selenium Enrichment And Its Effects on the Aboveground Parts Of Abelmoschus Manihot (L.) Medic

Ji¹,

Lin²,

Li³

et al. 2023

Bangladesh J. Bot.

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“…When plant cultures are grown in a stressful environment, a surplus of oxidative species is generated, negatively affecting the photosynthetic process. Fascinatingly, the synthesis of chlorophyll and other photosynthetic pigments can be accelerated at optimal doses of Se, which might be less toxic to destroy chloroplasts (Khan et al, 2023). In our study, SeNPs (50 ug/L) along with IBA (1 mg/L) had a promotive effect on total chlorophyll content (32.66±3.46 ug/ml) in the culture at a feasible level in the Caralluma tuberculata in-vitro cultures (Fig.…”

Section: Physiological Pro Ling Of Selenium Nanoparticles Mediated Mi...supporting

confidence: 49%

Exposure of Caralluma tuberculata to Biogenic Selenium Nanoparticles as in vitro rooting agent: Stimulates Morpho-Physiological and Antioxidant Defense System

Ali,

Mashwani,

Raja

et al. 2023

Preprint

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The commercial-scale production of Caralluma tuberculata faces significant challenges due to lower seed viability and sluggish rate of root growth in natural conditions. To overcome these obstacles, using phyto mediated selenium nanomaterials as an invitro rooting agent in plant invitro cultures is a promising approach to facilitate rapid propagation and enhance the production of valuable therapeutic compounds. This study aimed to investigate the impact of phytosynthesized selenium nanoparticles (SeNPs) on the morphological growth attributes, physiological status, and secondary metabolite fabrication in in vitro micro propagated Caralluma tuberculata. The results demonstrated that a lower dose of SeNPs (100 µg/L) along with Plant growth regulators (IBA: 1 mg/L) had an affirmative effect on growth parameters and promoted earliest root initiation (4.6±0.98 days), highest root frequency (68.21±5.12%), number of roots (6.3±1.8), maximum fresh weight (710±6.01 mg) and dry weight (549.89±6.77 mg). However, higher levels of SeNPs (200 and 400 µg/L) in the growth media proved detrimental to growth and development. Further, stressed caused by SeNPs at 100 ug/L along with PGRs (IBA: 1 mg/L) produced higher level of total chlorophyll contents (32.66± 4.36 ug/ml), while cultures exposed to 200 ug/L SeNPs alone exhibited maximum amount of Proline contents (10.5± 1.32 ug/ml). Interestingly, exposure to 400 µg/L SeNPs induced a stress response in the cultures, leading to increased levels of total phenolic content, total flavonoid content, and antioxidant activity (3.4 ± 0.052, 1.8 ± 0.034 and mg/g dry weight: DW and 82 ± 4.8%). Furthermore, the combination of 100 µg/L SeNPs and plant growth regulators (1 mg/L IBA) led to accelerated enzymatic antioxidant activities, including superoxide dismutase (SOD = 4.4 ± 0.067 U/mg), peroxidase dismutase (POD = 3.3 ± 0.043 U/mg), catalase (CAT = 2.8 ± 0.048 U/mg), and ascorbate peroxidase (APx = 1.6 ± 0.082 U/mg). This is the first report that highlights the efficacy of SeNPs in culture media and presents a promising approach for the commercial propagation of C. tuberculata with strong antioxidant defense system in vitro.

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“…Studies reported that such beneficial PGP traits of bacteria positively influence plant growth and development during stressed conditions by increasing nutrient accessibility and protection against oxidative damage ( Glick et al, 2007 ; Saikia et al, 2018 ). Studies have shown a positive impact of bacteria synthesized IAA on the morphology of plant roots as well as seed germination and growth of seedlings under the condition of osmotic stress, and they also help in the bio-fortification of micronutrients such as Zn, Se, Fe, and others ( Ngumbi and Kloepper, 2016 ; Saikia et al, 2018 ; Khanna et al, 2022 ). Furthermore, phosphate solubilizing rhizobacteria isolated from drought-impacted agroecosystems was observed to be more beneficial for the improvement of plant health under the availability of limited water conditions ( Sarma and Saikia, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Potential of desiccation-tolerant plant growth-promoting rhizobacteria in growth augmentation of wheat (Triticum aestivum L.) under drought stress

Shankar

Prasad²

2023

Front. Microbiol.

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Wheat (Triticum aestivum L.) yield and physiology are adversely affected due to limited water availability. However, desiccation-tolerant plant growth-promoting rhizobacteria (DT-PGPR) are potential candidates that can overcome the negative impacts of water stress. In the present study, a total of 164 rhizobacterial isolates were screened for desiccation tolerance up to −0.73 MPa osmotic pressure, of which five isolates exhibited growth and expression of plant growth properties under the influence of desiccation stress of −0.73 MPa. These five isolates were identified as Enterobacter cloacae BHUAS1, Bacillus cereus BHUAS2, Bacillus megaterium BHUIESDAS3, Bacillus megaterium BHUIESDAS4, and Bacillus megaterium BHUIESDAS5. All five isolates exhibited plant growth-promoting properties and production of exopolysaccharide (EPS) under the impact of desiccation stress. Furthermore, a pot experiment on wheat (variety HUW-234) inoculated with the isolates Enterobacter cloacae BHUAS1, Bacillus cereus BHUAS2, and Bacillus megaterium BHUIESDAS3 exhibited a positive influence on the growth of wheat under the condition of water stress. A significant improvement in plant height, root length, biomass, chlorophyll and carotenoid content, membrane stability index (MSI), leaf relative water content (RWC), total soluble sugar, total phenol, proline, and total soluble protein, were recorded under limited water-induced drought stress in treated plants as compared with non-treated plants. Moreover, plants treated with Enterobacter cloacae BHUAS1, Bacillus cereus BHUAS2, and Bacillus megaterium BHUIESDAS3 depicted improvement in enzymatic activities of several antioxidant enzymes such as guaiacol peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX). Beside this significant decrease in electrolyte leakage, H2O2 and malondialdehyde (MDA) contents were also recorded in treated plants. From the results obtained, it is evident that E. cloacae BHUAS1, B. megaterium BHUIESDAS3, and B. cereus BHUAS2 are the potential DT-PGPR having the capability to sustain growth and yield, alleviating the deleterious effect of water stress in wheat.

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Harnessing the role of selenium in soil–plant-microbe ecosystem: ecophysiological mechanisms and future prospects

Cited by 11 publications

References 175 publications

Characteristics of Soil Selenium Enrichment And Its Effects on the Aboveground Parts Of Abelmoschus Manihot (L.) Medic

Characteristics of Soil Selenium Enrichment And Its Effects on the Aboveground Parts Of Abelmoschus Manihot (L.) Medic

Exposure of Caralluma tuberculata to Biogenic Selenium Nanoparticles as in vitro rooting agent: Stimulates Morpho-Physiological and Antioxidant Defense System

Potential of desiccation-tolerant plant growth-promoting rhizobacteria in growth augmentation of wheat (Triticum aestivum L.) under drought stress

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