Root exudates impact plant performance under abiotic stress.

Yen Ning Chai, Daniel P Schachtman

Journal: Trends in plant science 2022;27(1):80-91

PMID: 34481715

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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.

Address: 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.; 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: [email protected].

DOI: 10.1016/j.tplants.2021.08.003

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MeSH Terms: Exudates and Transudates, Iron Deficiencies, Plant Exudates, Plant Roots, Rhizosphere, Soil Microbiology, Stress, Physiological