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. 2021 Dec 17;16(12):e0261468.
doi: 10.1371/journal.pone.0261468. eCollection 2021.

Plant growth promoting rhizobacteria improve growth and yield related attributes of chili under low nitrogen availability

Ali Raza  1 , Shaghef Ejaz  1 , Muhammad Shahzad Saleem  1 , Vaclav Hejnak  2 , Furqan Ahmad  3 , Mohamed A A Ahmed  4 , Saqer S Alotaibi  5 , Ahmed M El-Shehawi  5 , Moodi Saham Alsubeie  6 , Ali Tan Kee Zuan  7
Affiliations

Plant growth promoting rhizobacteria improve growth and yield related attributes of chili under low nitrogen availability

Ali Raza et al. PLoS One. .

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Abstract

Nitrogen (N) is a macronutrient desired by crop plants in large quantities. However, hiking fertilizer prices need alternative N sources for reducing its requirements through appropriate management practices. Plant growth promoting rhizobacteria (PGPR) are well-known for their role in lowering N requirements of crop plants. This study assessed the impact of PGPR inoculation on growth, allometry and biochemical traits of chili under different N doses. Two PGPR, i.e., Azospirillum 'Er-20' (nitrogen fixing) and Agrobacterium 'Ca-18' (phosphorous solubilizing) were used for inoculation, while control treatment had no PGPR inoculation. Six N doses, i.e., 100, 80, 75, 70, 60 and 50% of the N required by chili were included in the study. Data relating to growth traits, biochemical attributes and yield related traits were recorded. Interaction among N doses and PGPR inoculation significantly altered all growth traits, biochemical attributes and yield related traits. The highest values of the recorded traits were observed for 100% N with and without PGPR inoculation and 75% N with PGPR inoculation. The lowest values of the recorded traits were noted for 50% N without PGPR inoculation. The PGPR inoculation improved the measured traits compared to the traits recorded noted in same N dose without PGPR inoculation. Results revealed that PGPR had the potential to lower 25% N requirement for chili. Therefore, it is recommended that PGPR must be used in chili cultivation to lower N requirements.

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Conflict of interest statement

The authors have declared that no competing interests exist.

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