Cargando…

Potential Role of Foliar Application of Azotobacter on Growth, Nutritional Value and Quality of Lettuce under Different Nitrogen Levels

Vegetables can be treated with biofertilizers as an alternative to chemical fertilizers because of their low toxicity. We investigated the effects of foliar spraying of Azotobacter under different levels of nitrogen (100, 150 and 200 mg/L in nutrient solution) on the growth, nutritional value, nitra...

Descripción completa

Detalles Bibliográficos
Autores principales: Razmjooei, Zahra, Etemadi, Mohammad, Eshghi, Saeid, Ramezanian, Asghar, Mirazimi Abarghuei, Faezeh, Alizargar, Javad
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839414/
https://www.ncbi.nlm.nih.gov/pubmed/35161387
http://dx.doi.org/10.3390/plants11030406
_version_ 1784650363766308864
author Razmjooei, Zahra
Etemadi, Mohammad
Eshghi, Saeid
Ramezanian, Asghar
Mirazimi Abarghuei, Faezeh
Alizargar, Javad
author_facet Razmjooei, Zahra
Etemadi, Mohammad
Eshghi, Saeid
Ramezanian, Asghar
Mirazimi Abarghuei, Faezeh
Alizargar, Javad
author_sort Razmjooei, Zahra
collection PubMed
description Vegetables can be treated with biofertilizers as an alternative to chemical fertilizers because of their low toxicity. We investigated the effects of foliar spraying of Azotobacter under different levels of nitrogen (100, 150 and 200 mg/L in nutrient solution) on the growth, nutritional value, nitrate accumulation and antioxidant enzyme activities of hydroponically grown lettuce. The experiment was laid out in a completely randomized design with four replicates in a factorial combination. Plants treated with Azotobacter and 200 mg/L nitrogen had greater leaf area and photosynthetic pigments than plants treated with 200 mg/L nitrogen without spraying with Azotobacter. Increasing nitrogen levels increased leaf number, fresh and dry weights, leaf area and nitrate accumulation in lettuce plants. Peroxidase (POD) activity increased by 95.4% at a nitrogen level of 200 mg/L compared to a nitrogen level of 100 mg/L. Ascorbate peroxidase (APX) activity and leaf phosphorous (P) and potassium (K) concentrations were the highest in plants treated with a nitrogen source of 100 mg/L without foliar application of Azotobacter. As nitrogen levels increased in all treatments, nitrate reductase (NR) activity decreased and reached a minimum at the 200 mg/L nitrogen level. In general, foliar application of Azotobacter sp. can be used to promote plant growth and reduce nitrate accumulation in lettuce.
format Online
Article
Text
id pubmed-8839414
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-88394142022-02-13 Potential Role of Foliar Application of Azotobacter on Growth, Nutritional Value and Quality of Lettuce under Different Nitrogen Levels Razmjooei, Zahra Etemadi, Mohammad Eshghi, Saeid Ramezanian, Asghar Mirazimi Abarghuei, Faezeh Alizargar, Javad Plants (Basel) Article Vegetables can be treated with biofertilizers as an alternative to chemical fertilizers because of their low toxicity. We investigated the effects of foliar spraying of Azotobacter under different levels of nitrogen (100, 150 and 200 mg/L in nutrient solution) on the growth, nutritional value, nitrate accumulation and antioxidant enzyme activities of hydroponically grown lettuce. The experiment was laid out in a completely randomized design with four replicates in a factorial combination. Plants treated with Azotobacter and 200 mg/L nitrogen had greater leaf area and photosynthetic pigments than plants treated with 200 mg/L nitrogen without spraying with Azotobacter. Increasing nitrogen levels increased leaf number, fresh and dry weights, leaf area and nitrate accumulation in lettuce plants. Peroxidase (POD) activity increased by 95.4% at a nitrogen level of 200 mg/L compared to a nitrogen level of 100 mg/L. Ascorbate peroxidase (APX) activity and leaf phosphorous (P) and potassium (K) concentrations were the highest in plants treated with a nitrogen source of 100 mg/L without foliar application of Azotobacter. As nitrogen levels increased in all treatments, nitrate reductase (NR) activity decreased and reached a minimum at the 200 mg/L nitrogen level. In general, foliar application of Azotobacter sp. can be used to promote plant growth and reduce nitrate accumulation in lettuce. MDPI 2022-02-01 /pmc/articles/PMC8839414/ /pubmed/35161387 http://dx.doi.org/10.3390/plants11030406 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Razmjooei, Zahra
Etemadi, Mohammad
Eshghi, Saeid
Ramezanian, Asghar
Mirazimi Abarghuei, Faezeh
Alizargar, Javad
Potential Role of Foliar Application of Azotobacter on Growth, Nutritional Value and Quality of Lettuce under Different Nitrogen Levels
title Potential Role of Foliar Application of Azotobacter on Growth, Nutritional Value and Quality of Lettuce under Different Nitrogen Levels
title_full Potential Role of Foliar Application of Azotobacter on Growth, Nutritional Value and Quality of Lettuce under Different Nitrogen Levels
title_fullStr Potential Role of Foliar Application of Azotobacter on Growth, Nutritional Value and Quality of Lettuce under Different Nitrogen Levels
title_full_unstemmed Potential Role of Foliar Application of Azotobacter on Growth, Nutritional Value and Quality of Lettuce under Different Nitrogen Levels
title_short Potential Role of Foliar Application of Azotobacter on Growth, Nutritional Value and Quality of Lettuce under Different Nitrogen Levels
title_sort potential role of foliar application of azotobacter on growth, nutritional value and quality of lettuce under different nitrogen levels
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839414/
https://www.ncbi.nlm.nih.gov/pubmed/35161387
http://dx.doi.org/10.3390/plants11030406
work_keys_str_mv AT razmjooeizahra potentialroleoffoliarapplicationofazotobacterongrowthnutritionalvalueandqualityoflettuceunderdifferentnitrogenlevels
AT etemadimohammad potentialroleoffoliarapplicationofazotobacterongrowthnutritionalvalueandqualityoflettuceunderdifferentnitrogenlevels
AT eshghisaeid potentialroleoffoliarapplicationofazotobacterongrowthnutritionalvalueandqualityoflettuceunderdifferentnitrogenlevels
AT ramezanianasghar potentialroleoffoliarapplicationofazotobacterongrowthnutritionalvalueandqualityoflettuceunderdifferentnitrogenlevels
AT mirazimiabarghueifaezeh potentialroleoffoliarapplicationofazotobacterongrowthnutritionalvalueandqualityoflettuceunderdifferentnitrogenlevels
AT alizargarjavad potentialroleoffoliarapplicationofazotobacterongrowthnutritionalvalueandqualityoflettuceunderdifferentnitrogenlevels