Management practices alter endophytic diazotrophic communities in CitraBlue St. Augustinegrass

Crop Science, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 19, 2024

Abstract Turfgrass research based on inoculations with commercial products containing nitrogen‐fixing endophytes as an alternative to synthetic nitrogen (N) fertilizers has yielded inconclusive results, indicating a lack of understanding the colonization and stability diazotrophic in turfgrasses. Potential factors influencing these results are turfgrass traditional management practices. In this study, we identified compared endophytic communities their associated soil counterparts using amplicon sequencing nitrogenase iron protein (nifH) 36 surfaced sterilized CitraBlue St. Augustinegrass cultivar [ Stenotaphrum secundatum (Walter) Kuntze] sprigs 12 aggregated samples. Samples were collected from mowed either at 5 or 10 cm, without thatch removal, fertilized 98, 195, 293 kg N ha −1 year . The different diazotrophs correlated quality related parameters such normalized difference vegetation index (NDVI), red edge (NDRE), leaf content, visual affected by significantly for alpha diversity ( p < 0.0001) beta 0.001). Both mowing height 0.001) fertilization rate 0.05) had significant effect diazotrophs. According redundancy analysis, explained 14.3% variance communities. Findings demonstrate that evaluated practices alter CitraBlue.

Language: Английский

Beneficial Microorganisms: Sulfur-Oxidizing Bacteria Modulate Salt and Drought Stress Responses in the Halophyte Plantago coronopus L

Sustainability, Journal Year: 2024, Volume and Issue: 16(24), P. 10866 - 10866

Published: Dec. 11, 2024

Land degradation due to salinity and prolonged drought poses significant global challenges by reducing crop yields, depleting resources, disrupting ecosystems. Halophytes, equipped with adaptive traits for soil salinity, their associations halotolerant microbes, offer promising solutions restoring degraded areas sustainably. This study evaluated the effects of halophilic sulfur-oxidizing bacteria (SOB), specifically Halothiobacillus halophilus, on physiological biochemical responses halophyte Plantago coronopus L. under salt stress. We analyzed accumulation ions (Na, Cl, K) sulfur (S), along growth parameters, glutathione levels, photosynthetic pigments, proline, phenolic compounds. Drought significantly reduced water content (nearly 10-fold in plants without SOB 4-fold those SOB). The leaf tolerance index improved 70% control 30% moderately salt-stressed (300 mM NaCl) after application. increased all treatments except at high (600 NaCl), toxic sodium chloride ion accumulation, enhanced potassium levels moderate salinity. Proline, total phenolic, malondialdehyde (MDA) were highest drought-stressed plants, regardless inoculation. inoculation GSH both 300 NaCl-treated while GSSG remained constant. These findings highlight potential as beneficial microorganisms enhance availability improve P.

Language: Английский

Morphological, Physiological and Cellular Responses of Plants to Cadmium Toxicity

Environmental science and engineering, Journal Year: 2024, Volume and Issue: unknown, P. 89 - 108

Published: Jan. 1, 2024

Language: Английский