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Effects of potassium availability on growth and development of barley cultivars

Citation

Al-Azzawi, W and Gill, MB and Fatehi, F and Zhou, M and Acuna, T and Shabala, L and Yu, M and Shabala, S, Effects of potassium availability on growth and development of barley cultivars, Agronomy, 11 Article 2269. ISSN 2073-4395 (2021) [Refereed Article]


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Copyright 2021 The Authors Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/agronomy11112269

Abstract

Potassium deficiency is one of the major issues affecting crop production around the globe. Giving the high cost of potassium fertilizers and environmental concerns related to inappropriate fertilization practices, developing more potassium use efficient (KUE) varieties is critical for sustainable food production in agricultural systems. In this study, we analysed the impact of potassium availability on agronomical attributes of thirty barley genotypes grown at four different levels of potassium (0.002 mM, 0.02 mM, 2 mM, 20 mM) under glasshouse conditions. The results showed that the availability of potassium in the soil had a major effect on yield components i.e., spike number, grain number and grain weight. Furthermore, grain weight showed a strong correlation with grain number and spike number at all levels of potassium supply. Although an increase in potassium supply led to an increase in plant height in all genotypes, the correlation with grain weight was very weak at all levels. Potassium supplementation caused an increase in shoot dry weight, which also showed a weak correlation with grain weight at the 0.002 mM potassium supply level. The genotypes Gebeina, Skiff, YF374, Flagship and YF374 were highly efficient in performing at suboptimal K supply levels and, thus, can be recommended to be grown in K-impoverished soils. We also suggest that grain and spike numbers could be used as proxies for KUE studies, to construct DH lines and identify QTL to improve low potassium tolerance and KUE in barley.

Item Details

Item Type:Refereed Article
Keywords:potassium use efficiency, QTL, barley, growth, genotypic variability, grain number
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture biochemistry and physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Barley
UTAS Author:Al-Azzawi, W (Ms Widad Al-Azzawi)
UTAS Author:Gill, MB (Mr Muhammad Gill)
UTAS Author:Fatehi, F (Dr Foad Fatehi)
UTAS Author:Zhou, M (Professor Meixue Zhou)
UTAS Author:Acuna, T (Professor Tina Acuna)
UTAS Author:Shabala, L (Associate Professor Lana Shabala)
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:147855
Year Published:2021
Deposited By:Agriculture and Food Systems
Deposited On:2021-11-18
Last Modified:2022-05-12
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