Root exudates impact plant performance under abiotic stress

Yen Ning Chai; Daniel P Schachtman

doi:10.1016/j.tplants.2021.08.003

Root exudates impact plant performance under abiotic stress

Trends Plant Sci. 2022 Jan;27(1):80-91. doi: 10.1016/j.tplants.2021.08.003. Epub 2021 Sep 1.

Authors

Yen Ning Chai¹, Daniel P Schachtman²

Affiliations

¹ Department of Agronomy and Horticulture, University of Nebraska - Lincoln, Lincoln, NE 68588, USA; Center for Plant Science Innovation, University of Nebraska - Lincoln, Lincoln, NE 68588, USA.
² Department of Agronomy and Horticulture, University of Nebraska - Lincoln, Lincoln, NE 68588, USA; Center for Plant Science Innovation, University of Nebraska - Lincoln, Lincoln, NE 68588, USA. Electronic address: daniel.schachtman@unl.edu.

PMID: 34481715
DOI: 10.1016/j.tplants.2021.08.003

Abstract

Plant root exudates serve pivotal roles in supporting plant development and interactions with the physicochemical and biological factors in the rhizosphere. Under stress conditions, root exudation is involved in enhancing plant resource-use efficiency and facilitating the crosstalk between plant and soil microbes to ameliorate stress. Although there are a large number of root exudates that remain to be characterized, recent technological advancements have allowed for the function of many exudate compounds to be elucidated. In this review, we discuss current knowledge about the key root exudates that modulate plant resource-use efficiency under various abiotic stresses including drought, aluminum toxicity, phosphorus, nitrogen, and iron deficiency. The role that key root exudates play in shaping microbial communities in the rhizosphere under stress conditions is also an important consideration addressed in this review.

Keywords: abiotic stress; carboxylate; rhizosphere; root exudate.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Review

MeSH terms

Exudates and Transudates
Iron Deficiencies*
Plant Exudates
Plant Roots
Rhizosphere
Soil Microbiology*
Stress, Physiological

Substances

Plant Exudates