Endophyte-mediated enhancement of salt resistance in Arachis hypogaea L. by regulation of osmotic stress and plant defense-related genes

Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 15

Published: May 23, 2024

Soil salinization poses a significant environmental challenge affecting plant growth and agricultural sustainability. This study explores the potential of salt-tolerant endophytes to mitigate adverse effects soil salinization, emphasizing their impact on development resistance Arachis hypogaea L. (peanuts). The diversity culturable endophytic bacteria associated with Miscanthus lutarioriparius was investigated. focused Bacillus tequilensis, Staphylococcus epidermidis, siamensis germination A. seeds in pots subjected high NaCl concentrations (200 mM L-1). Under elevated concentrations, inoculation significantly (p < 0.05) enhanced seedling increased activities enzymes such as Superoxide dismutase, catalase, polyphenol oxidase, while reducing malondialdehyde peroxidase levels. Additionally, endophyte resulted root surface area, height, biomass contents, leaf area peanuts under stress. Transcriptome data revealed an augmented defense response induced by applied (B. S. B. siamensis) strain, including upregulation abiotic stress related mechanisms fat metabolism, hormones, glycosyl inositol phosphorylceramide (Na+ receptor). Na+ receptor salt gate Ca2+ influx channels plants. Notably, synthesis secondary metabolites, especially genes terpene phenylpropanoid pathways, highly regulated. inoculated played possible role enhancing tolerance peanuts. Future investigations should explore protein-protein interactions between plants unravel underlying endophyte-mediated

Language: Английский

Effect of Persistent Salt Stress on the Physiology and Anatomy of Hybrid Walnut (Juglans major × Juglans regia) Seedlings

Plants, Journal Year: 2024, Volume and Issue: 13(13), P. 1840 - 1840

Published: July 4, 2024

Soil salinization has become one of the major problems that threaten ecological environment. The aim this study is to explore mechanism salt tolerance hybrid walnuts (Juglans × Juglans regia) under long-term stress through dynamic changes growth, physiological and biochemical characteristics, anatomical structure. Our findings indicate (1) inhibited seedling height ground diameter increase, (2) with increasing concentration, relative water content (RWC) decreased, proline (Pro) soluble sugar (SS) increased. Pro reached a maximum 549.64 μg/g on 42nd day. increase in superoxide dismutase (SOD) activity (46.80-117.16%), ascorbate peroxidase (APX) activity, total flavonoid (TFC), phenol (TPC) reduced accumulation malondialdehyde (MDA). (3) Increasing concentration led increases subsequent decreases thickness palisade tissues, spongy leaves, leaf vascular bundle diameter. Upper lower skin thickness, root periderm diameter, cortex showed different patterns change at varying concentrations durations. Overall, concluded enhanced antireactive oxygen system, increased levels osmotic regulators, low promoted anatomy, but exposure high levels, anatomy was severely damaged. For first time, combined structure vegetative organ walnut physiology biochemistry, which great significance for addressing challenge expanding planting area.

Language: Английский