Rights statement: This is the peer reviewed version of the following article: Aslam, M.M., Karanja, J.K., Dodd, I.C., Waseem, M. & Weifeng, X. (2022) Rhizosheath: An adaptive root trait to improve plant tolerance to phosphorus and water deficits? Plant, Cell & Environment, 45, 2861– 2874. doi: doi.org/10.1111/pce.14395 which has been published in final form at https://onlinelibrary.wiley.com/doi/10.1111/pce.14395 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Accepted author manuscript, 4.38 MB, Word document
Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License
Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Rhizosheath
T2 - An adaptive root trait to improve plant tolerance to phosphorus and water deficits?
AU - Aslam, Mehtab Muhammad
AU - Karanja, Joseph K.
AU - Dodd, Ian C.
AU - Waseem, Muhammad
AU - Weifeng, Xu
N1 - This is the peer reviewed version of the following article: Aslam, M.M., Karanja, J.K., Dodd, I.C., Waseem, M. & Weifeng, X. (2022) Rhizosheath: An adaptive root trait to improve plant tolerance to phosphorus and water deficits? Plant, Cell & Environment, 45, 2861– 2874. doi: doi.org/10.1111/pce.14395 which has been published in final form at https://onlinelibrary.wiley.com/doi/10.1111/pce.14395 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
PY - 2022/10/31
Y1 - 2022/10/31
N2 - Drought and nutrient limitations adversely affect crop yields, with below-ground traits enhancing crop production in these resource-poor environments. This review explores the interacting biological, chemical and physical factors that determine rhizosheath (soil adhering to the root system) development, and its influence on plant water uptake and phosphorus acquisition in dry soils. Identification of quantitative trait loci for rhizosheath development indicate it is genetically determined, but the microbial community also directly (polysaccharide exudation) and indirectly (altered root hair development) affect its extent. Plants with longer and denser root hairs had greater rhizosheath development and increased P uptake efficiency. Moreover, enhanced rhizosheath formation maintains contact at the root-soil interface thereby assisting water uptake from drying soil, consequently improving plant survival in droughted environments. Nevertheless, it can be difficult to determine if rhizosheath development is a cause or consequence of improved plant adaptation to dry and nutrient-depleted soils. Does rhizosheath development directly enhance plant water and phosphorus use, or do other tolerance mechanisms allow plants to invest more resources in rhizosheath development? Much more work is required on the interacting genetic, physical, biochemical and microbial mechanisms that determine rhizosheath development, to demonstrate that selection for rhizosheath development is a viable crop improvement strategy.
AB - Drought and nutrient limitations adversely affect crop yields, with below-ground traits enhancing crop production in these resource-poor environments. This review explores the interacting biological, chemical and physical factors that determine rhizosheath (soil adhering to the root system) development, and its influence on plant water uptake and phosphorus acquisition in dry soils. Identification of quantitative trait loci for rhizosheath development indicate it is genetically determined, but the microbial community also directly (polysaccharide exudation) and indirectly (altered root hair development) affect its extent. Plants with longer and denser root hairs had greater rhizosheath development and increased P uptake efficiency. Moreover, enhanced rhizosheath formation maintains contact at the root-soil interface thereby assisting water uptake from drying soil, consequently improving plant survival in droughted environments. Nevertheless, it can be difficult to determine if rhizosheath development is a cause or consequence of improved plant adaptation to dry and nutrient-depleted soils. Does rhizosheath development directly enhance plant water and phosphorus use, or do other tolerance mechanisms allow plants to invest more resources in rhizosheath development? Much more work is required on the interacting genetic, physical, biochemical and microbial mechanisms that determine rhizosheath development, to demonstrate that selection for rhizosheath development is a viable crop improvement strategy.
KW - alternate wetting and drying cycles
KW - drought
KW - QTLs
KW - water uptake
U2 - 10.1111/pce.14395
DO - 10.1111/pce.14395
M3 - Journal article
VL - 45
SP - 2861
EP - 2874
JO - Plant, Cell and Environment
JF - Plant, Cell and Environment
SN - 0140-7791
IS - 10
ER -