Phytostimulatory Influence of Comamonas testosteroni and Silver Nanoparticles on Linum usitatissimum L. under Salinity Stress

Abstract

They were shifting in land use increases salinity stress, significant abiotic stress affecting plant growth, limiting crop productivity. This work aimed to improve Linum usitatissimum L. (linseed) growth under salinity using Comamonas testosteroni and silver nanoparticles (AgNPs). AgNPs were fabricated exploiting Rosmarinus officinalis and monitored by U.V./Vis spectrophotometry scanning electron microscopy (SEM) and Fourier transforms infrared spectroscopy (FTIR). Photosynthetic pigments, enzymatic and nonenzymatic antioxidants of linseed were investigated under salt stress in treated and untreated plants with C. testosteroni alongside AgNPs. Our findings recorded the formation of AgNPs at 457 nm, which were globular and with a diameter of 75 nm. Notably, chlorophyll-a, b, and total chlorophyll reduction while enhanced carotenoids and anthocyanin contents were attained under salinity stress. Total dissoluble sugars, proline, and dissoluble proteins, H2O2, malondialdehyde, enzymatic and nonenzymatic antioxidants were significantly elevated in NaCl well. Combined AgNPs and C. testosteroni elevated photosynthetic pigments. Also, they led to the mounting of soluble sugars, proline, and soluble proteins. H2O2 and malondialdehyde decreased while enzymatic and nonenzymatic antioxidants increased in response to AgNPs, C. testosteroni, and their combination. Thus, AgNPs and C. testosteroni might bio-fertilizers to improve linseed crop productivity under salinity stress.

Modulating response of Zea mays to induced salinity stress through application of nitrate mediated silver nanoparticles and indole acetic acid

“…The increase in chlorophyll content at different salt concentrations raised corresponded with the results obtained by Singh, Sillu, Kumar, and Agnihotri (2021). Our results regarding a decrease in chlorophyll a and b, and total chlorophyll, agreed with the work reported by Khalofah, Kilany, and Migdadi (2021). Carotenoids content was observed to be decreased with salinity stress, supported by the studies of Jahangir, Javed, and Bano (2020).…”

Alleviating the adverse effects of salinity on Roselle plants by green synthesized nanoparticles

“…These are important as natural solutes that maintain cellular homeostasis and assist in cell osmoregulation under salinity stress. Similar to our findings, Khalofah et al 42 reported that NPs increased the amounts of proline and soluble sugars in linseed under salt stress. Abiotic types of stress such as salinity and drought caused excessive amounts of reactive oxygen species (ROS), which resulted in the vulnerability of proteins, DNA, and carbohydrates in plants.…”

Enhanced Production of Active Photosynthetic and Biochemical Molecules in Silybum marianum L. Using Biotic and Abiotic Elicitors in Hydroponic Culture

“…The effect of biogenically generated AgNPs at appropriate concentrations on rice plant carotenoid and chlorophyll levels was explored by the authors of reference [ 76 ], and there was a considerable increase in their production. The authors of reference [ 77 ] investigated the effect of AgNPs on Linum usitatissimum L. and found that they were effective in raising carotenoid contents, and AgNPs showed a significant rise in chlorophyll concentration in recent research by the author of reference [ 78 ].…”