Naslov (srp)

Bacillus velezensis enhances nitrogen content and stress resilience in wheat

Autor

Knežević, Magdalena
Buntić, Aneta
Dervišević Milenković, Marina

Opis (eng)

Abstract: Bacillus species, including Bacillus velezensis, are plant growth-promoting rhizobacteria (PGPR) that enhance crop performance by improving nutrient uptake and alleviating biotic stresses. Nitrogen (N) status is crucial for wheat growth, photosynthesis, and yield, particularly under pathogen pressure. Microbial inoculants can increase N uptake and assimilation, elevate photosynthetic capacity, and mitigate stress by mechanisms such as ACC deaminase production, antimicrobial compound synthesis, and induction of systemic resistance. This study investigated the effect of B. velezensis BHC 3.1 inoculation on N content in wheat (Triticum aestivum) under infection with Fusarium poae. A pot experiment was conducted in a semi-controlled greenhouse with four wheat seed treatments: i) uninoculated control (Ø), ii) bacterial inoculation (B), iii) fungal infection (F), and iv) combined fungal infection and bacterial inoculation (B+F). Leaf nitrogen content was measured at the early heading stage using a Dualex Scientific leaf clip meter device. In comparison to the uninoculated control (Ø), fungal infection (F) decreased N content for 17.95%. On the other hand, bacterial inoculation (B) increased N content by 17.76% relative to the uninoculated control. In infected plants, inoculation (B+F) enhanced N content by 30.22% compared to infected plants without inoculation (F). These results indicate that B. velezensis reduces the negative effects of F. poae infection on nitrogen accumulation, likely through improved nutrient uptake and stress alleviation mechanisms. In this way, inoculation with this strain strengthens plant physiological resilience and nutrient status under pathogen pressure. Overall, B. velezensis BHC 3.1 has the potential for improving wheat nitrogen status and stress tolerance, highlighting its role in biotic stress conditions.

Jezik

engleski

Datum

2026

Licenca

© All rights reserved

Predmet

Bacillus velezensis; Fusarium poae; Triticum aestivum; nitrogen status; microbial inoculants

Deo kolekcije (1)

o:508

Institut za zemljište