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Root hairs improve root penetration, root-soil contact, and phosphorus acquisition in soils of different strength.
J Exp Bot. 2013 Sep; 64(12):3711-21.JE

Abstract

Root hairs are a key trait for improving the acquisition of phosphorus (P) by plants. However, it is not known whether root hairs provide significant advantage for plant growth under combined soil stresses, particularly under conditions that are known to restrict root hair initiation or elongation (e.g. compacted or high-strength soils). To investigate this, the root growth and P uptake of root hair genotypes of barley, Hordeum vulgare L. (i.e. genotypes with and without root hairs), were assessed under combinations of P deficiency and high soil strength. Genotypes with root hairs were found to have an advantage for root penetration into high-strength layers relative to root hairless genotypes. In P-deficient soils, despite a 20% reduction in root hair length under high-strength conditions, genotypes with root hairs were also found to have an advantage for P uptake. However, in fertilized soils, root hairs conferred an advantage for P uptake in low-strength soil but not in high-strength soil. Improved root-soil contact, coupled with an increased supply of P to the root, may decrease the value of root hairs for P acquisition in high-strength, high-P soils. Nevertheless, this work demonstrates that root hairs are a valuable trait for plant growth and nutrient acquisition under combined soil stresses. Selecting plants with superior root hair traits is important for improving P uptake efficiency and hence the sustainability of agricultural systems.

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Authors+Show Affiliations

Haling RE
School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.
Brown LK
No affiliation info available
Bengough AG
No affiliation info available
Young IM
No affiliation info available
Hallett PD
No affiliation info available
White PJ
No affiliation info available
George TS
No affiliation info available

MeSH

AgricultureGenotypeHordeumPhosphorusPlant RootsSoil

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23861547

Citation

Haling, Rebecca E., et al. "Root Hairs Improve Root Penetration, Root-soil Contact, and Phosphorus Acquisition in Soils of Different Strength." Journal of Experimental Botany, vol. 64, no. 12, 2013, pp. 3711-21.
Haling RE, Brown LK, Bengough AG, et al. Root hairs improve root penetration, root-soil contact, and phosphorus acquisition in soils of different strength. J Exp Bot. 2013;64(12):3711-21.
Haling, R. E., Brown, L. K., Bengough, A. G., Young, I. M., Hallett, P. D., White, P. J., & George, T. S. (2013). Root hairs improve root penetration, root-soil contact, and phosphorus acquisition in soils of different strength. Journal of Experimental Botany, 64(12), 3711-21. https://doi.org/10.1093/jxb/ert200
Haling RE, et al. Root Hairs Improve Root Penetration, Root-soil Contact, and Phosphorus Acquisition in Soils of Different Strength. J Exp Bot. 2013;64(12):3711-21. PubMed PMID: 23861547.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Root hairs improve root penetration, root-soil contact, and phosphorus acquisition in soils of different strength. AU - Haling,Rebecca E, AU - Brown,Lawrie K, AU - Bengough,A Glyn, AU - Young,Iain M, AU - Hallett,Paul D, AU - White,Philip J, AU - George,Timothy S, Y1 - 2013/07/16/ PY - 2013/7/18/entrez PY - 2013/7/19/pubmed PY - 2014/4/2/medline KW - Barley KW - Hordeum vulgare L. KW - cereals KW - drought KW - mechanical impedance KW - plough pan KW - rhizosheath KW - rhizosphere KW - tillage. SP - 3711 EP - 21 JF - Journal of experimental botany JO - J Exp Bot VL - 64 IS - 12 N2 - Root hairs are a key trait for improving the acquisition of phosphorus (P) by plants. However, it is not known whether root hairs provide significant advantage for plant growth under combined soil stresses, particularly under conditions that are known to restrict root hair initiation or elongation (e.g. compacted or high-strength soils). To investigate this, the root growth and P uptake of root hair genotypes of barley, Hordeum vulgare L. (i.e. genotypes with and without root hairs), were assessed under combinations of P deficiency and high soil strength. Genotypes with root hairs were found to have an advantage for root penetration into high-strength layers relative to root hairless genotypes. In P-deficient soils, despite a 20% reduction in root hair length under high-strength conditions, genotypes with root hairs were also found to have an advantage for P uptake. However, in fertilized soils, root hairs conferred an advantage for P uptake in low-strength soil but not in high-strength soil. Improved root-soil contact, coupled with an increased supply of P to the root, may decrease the value of root hairs for P acquisition in high-strength, high-P soils. Nevertheless, this work demonstrates that root hairs are a valuable trait for plant growth and nutrient acquisition under combined soil stresses. Selecting plants with superior root hair traits is important for improving P uptake efficiency and hence the sustainability of agricultural systems. SN - 1460-2431 UR - https://www.unboundmedicine.com/medline/citation/23861547/Root_hairs_improve_root_penetration_root_soil_contact_and_phosphorus_acquisition_in_soils_of_different_strength_ L2 - https://academic.oup.com/jxb/article-lookup/doi/10.1093/jxb/ert200 DB - PRIME DP - Unbound Medicine ER -