Cell water content and lignification in maize regulated by rhizobacteria under salinity

Abstract

Abstract. Inoculation of plant growth promoting rhizobacteria (PGPR) Pseudomonas aeruginosa and Bacillus megaterium in maize plant under salinity stress was analyzed for its growth promotion efficacy and induction of physiological mechanism. In this study effect of these isolates were focused on the cellular level as with lignin deposition, cell wall lignin content and cell water status of maize under salinity. Maize plants get protected from the salinity induced injury by enhancing the plant growth, regulating relative water content, enhancing phenols, flavonoids as well as lignification of cell and antioxidant enzymes also. The study states that, PGPR helps in maize plant under salinity to increase the cell membrane stability, plays a significant action in the directive of cell permeability for the survival of plants. Nevertheless, the cell wall bounded peroxidase and phenylalanine ammonia-lyase (PAL) activity reduced with gradual increase soil in non-inoculated plants. So plants inoculated with selected root-associated bacteria has a positive response on cell content and water status in maize under salinity.

Drought-tolerant Sphingobacterium changzhouense Alv associated with Aloe vera mediates drought tolerance in maize (Zea mays)

“…These compounds were found to prevent tissues from oxidative damage and enable plants to tolerate stresses (Pazoki 2015 ; Ilangumaran and Smith 2017 ; Nawaz and Bano 2020 ). Our results agreed with those obtained by Jha ( 2017 ) who reported that phenolics and flavonoids were enhanced in PGPB-inoculated maize under normal and stress conditions. Furthermore, the total antioxidant capacity was significantly ( p ≤ 0.05) increased in inoculated plants compared with the non-inoculated plants under drought stress (Fig.…”

Endophytic Plant Growth-Promoting Bacterium Bacillus subtilis Reduces the Toxic Effect of Cadmium on Wheat Plants

“…There are few data on the effect of PGPM on the lignification of plant cells. For example, the rhizobacteria Pseudomonas aeruginosa and B. megaterium protected maize plants from salt stress-caused damages along with regulating cell water content, phenols, flavonoids, and antioxidant enzymes, also through lignification [ 70 ]. Inoculation with the plant growth-promoting rhizobacteria cytokinin-producing B. subtilis and auxin-producing P. mandelii strains resulted in a faster appearance of Casparian bands in the root endodermis and an increased growth of the salt-stressed plants [ 27 ].…”

Staphylococcus arlettae mediated defense mechanisms and metabolite modulation against arsenic stress in Helianthus annuus

“…Bacterial proliferation was assessed by measuring the optical density (OD) of the cultures at a wavelength of 600 nm. Additionally, the biotransformation potential of S. arlettae was evaluated by quantifying the presence of As +5 and As +3 in the bacterial strain's culture supernatant exhausting the Community Bureau of Reference (BCR) technique (Kazi et al, 2005).…”