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PEG-Induced Osmotic Stress Alters Root Morphology and Root Hair Traits in Wheat Genotypes

Wheat crop in drought-prone regions of Bangladesh suffers from osmotic stress. The objective of this study was to investigate the response of wheat genotypes with respect to root morphology and root hair traits under polyethylene glycol (PEG)-induced osmotic stress. A total of 22 genotypes of wheat...

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Detalles Bibliográficos
Autores principales: Robin, Arif Hasan Khan, Ghosh, Shatabdi, Shahed, Md. Abu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8224394/
https://www.ncbi.nlm.nih.gov/pubmed/34064258
http://dx.doi.org/10.3390/plants10061042
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author Robin, Arif Hasan Khan
Ghosh, Shatabdi
Shahed, Md. Abu
author_facet Robin, Arif Hasan Khan
Ghosh, Shatabdi
Shahed, Md. Abu
author_sort Robin, Arif Hasan Khan
collection PubMed
description Wheat crop in drought-prone regions of Bangladesh suffers from osmotic stress. The objective of this study was to investigate the response of wheat genotypes with respect to root morphology and root hair traits under polyethylene glycol (PEG)-induced osmotic stress. A total of 22 genotypes of wheat were grown hydroponically and two treatments—0% and 10% PEG—were imposed at 14 days after germination. Plant growth was reduced in terms of plant height, number of live leaves per tiller, shoot dry weight, number of root-bearing phytomers, and roots per tiller. Notably, PEG-induced osmotic stress increased root dry weight per tiller by increasing length of the main axis and lateral roots, as well as the diameter and density of both lateral roots and root hairs of the individual roots. A biplot was drawn after a principal component analysis, taking three less-affected (high-yielding genotypes) and three highly affected (low-yielding genotypes and landrace) genotypes under 10% PEG stress, compared to control. Principal component 1 separated PEG-treated wheat genotypes from control-treated genotypes, with a high and positive coefficient for the density of lateral roots and root hairs, length and diameter of the main axis, and first-order lateral roots and leaf injury scores, indicating that these traits are associated with osmotic stress tolerance. Principal component 2 separated high-yielding and tolerant wheat genotypes from low-yielding and susceptible genotypes, with a high coefficient for root dry weight, density of root hairs and second-order lateral roots, length of the main axis, and first-order lateral roots. An increase in root dry weight in PEG-stress-tolerant wheat genotypes was achieved through an increase in length and diameter of the main axis and lateral roots. The information derived from this research could be exploited for identifying osmotic stress-tolerant QTL and for developing abiotic-tolerant cultivars of wheat.
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spelling pubmed-82243942021-06-25 PEG-Induced Osmotic Stress Alters Root Morphology and Root Hair Traits in Wheat Genotypes Robin, Arif Hasan Khan Ghosh, Shatabdi Shahed, Md. Abu Plants (Basel) Article Wheat crop in drought-prone regions of Bangladesh suffers from osmotic stress. The objective of this study was to investigate the response of wheat genotypes with respect to root morphology and root hair traits under polyethylene glycol (PEG)-induced osmotic stress. A total of 22 genotypes of wheat were grown hydroponically and two treatments—0% and 10% PEG—were imposed at 14 days after germination. Plant growth was reduced in terms of plant height, number of live leaves per tiller, shoot dry weight, number of root-bearing phytomers, and roots per tiller. Notably, PEG-induced osmotic stress increased root dry weight per tiller by increasing length of the main axis and lateral roots, as well as the diameter and density of both lateral roots and root hairs of the individual roots. A biplot was drawn after a principal component analysis, taking three less-affected (high-yielding genotypes) and three highly affected (low-yielding genotypes and landrace) genotypes under 10% PEG stress, compared to control. Principal component 1 separated PEG-treated wheat genotypes from control-treated genotypes, with a high and positive coefficient for the density of lateral roots and root hairs, length and diameter of the main axis, and first-order lateral roots and leaf injury scores, indicating that these traits are associated with osmotic stress tolerance. Principal component 2 separated high-yielding and tolerant wheat genotypes from low-yielding and susceptible genotypes, with a high coefficient for root dry weight, density of root hairs and second-order lateral roots, length of the main axis, and first-order lateral roots. An increase in root dry weight in PEG-stress-tolerant wheat genotypes was achieved through an increase in length and diameter of the main axis and lateral roots. The information derived from this research could be exploited for identifying osmotic stress-tolerant QTL and for developing abiotic-tolerant cultivars of wheat. MDPI 2021-05-21 /pmc/articles/PMC8224394/ /pubmed/34064258 http://dx.doi.org/10.3390/plants10061042 Text en © 2021 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
Robin, Arif Hasan Khan
Ghosh, Shatabdi
Shahed, Md. Abu
PEG-Induced Osmotic Stress Alters Root Morphology and Root Hair Traits in Wheat Genotypes
title PEG-Induced Osmotic Stress Alters Root Morphology and Root Hair Traits in Wheat Genotypes
title_full PEG-Induced Osmotic Stress Alters Root Morphology and Root Hair Traits in Wheat Genotypes
title_fullStr PEG-Induced Osmotic Stress Alters Root Morphology and Root Hair Traits in Wheat Genotypes
title_full_unstemmed PEG-Induced Osmotic Stress Alters Root Morphology and Root Hair Traits in Wheat Genotypes
title_short PEG-Induced Osmotic Stress Alters Root Morphology and Root Hair Traits in Wheat Genotypes
title_sort peg-induced osmotic stress alters root morphology and root hair traits in wheat genotypes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8224394/
https://www.ncbi.nlm.nih.gov/pubmed/34064258
http://dx.doi.org/10.3390/plants10061042
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