Abstract
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, H 2 O 2 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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Claims 9
Claim · model-written summary
Five isolates grew and expressed growth promoting properties under desiccation.
- Taxon
- Wheat
Triticum aestivumt0 - Outcome
- growth and expression of plant growth propertiese0
- Qualifier
- −0.73 MPae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“five isolates exhibited growth and expression of plant growth properties under the influence of desiccation stress of −0.73 MPa”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Five isolates produced exopolysaccharide under desiccation stress.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- production of exopolysaccharide (EPS)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All five isolates exhibited plant growth-promoting properties and production of exopolysaccharide (EPS) under the impact of desiccation stress”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Inoculated wheat showed improved growth under water stress.
- Taxon
- wheatTriticum aestivume0
- Material
- variety HUW-234e0
- Treatment
- inoculated with the isolates Enterobacter cloacae BHUAS1, Bacillus cereus BHUAS2, and Bacillus megaterium BHUIESDAS3e0
- Outcome
- growth of wheate0
- Direction
- positive influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
Claim · model-written summary
Treated wheat improved in height, root length and biomass under drought.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- treated plantse0
- Outcome
- plant height, root length, biomasse0
- Direction
- improvemente0
- Comparator
- non-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Treated wheat improved in chlorophyll, carotenoids and membrane stability.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- treated plantse0
- Outcome
- chlorophyll and carotenoid content, membrane stability index (MSI)e0
- Direction
- improvemente0
- Comparator
- non-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Treated wheat improved in relative water content and soluble sugar.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- treated plantse0
- Outcome
- leaf relative water content (RWC), total soluble sugare0
- Direction
- improvemente0
- Comparator
- non-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Treated wheat improved in phenol, proline and soluble protein.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- treated plantse0
- Outcome
- total phenol, proline, and total soluble proteine0
- Direction
- improvemente0
- Comparator
- non-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Inoculated wheat improved antioxidant enzyme activity.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- treated with Enterobacter cloacae BHUAS1, Bacillus cereus BHUAS2, and Bacillus megaterium BHUIESDAS3e0
- Outcome
- enzymatic activitiese0
- Direction
- improvemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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)”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Treated wheat had decreased electrolyte leakage, hydrogen peroxide and malondialdehyde.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- treated plantse0
- Outcome
- electrolyte leakage, H 2 O 2 and malondialdehyde (MDA) contentse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant decrease in electrolyte leakage, H 2 O 2 and malondialdehyde (MDA) contents were also recorded in treated plants”
t0“Wheat (Triticum aestivum L.)”
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