Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/ijms23031137
Keywords
acidic soil; aluminum toxicity; organic acids; phosphate deficiency; signal crosstalk; stress response
Funding
- Natural Science Foundation of China [31760615, 31760584, 31501827, 31572193]
- National Key Research and Development Plant [2017YFC1702500]
- Major Science and Technique Programs in Yunnan Province [202102AA310048, 202102AE090042]
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This review paper summarizes the mutual mechanisms by which plants deal with aluminum toxicity and phosphorus starvation. It explores the roles of factors such as organic acids, plant-growth-promoting bacteria, transcription factors, transporters, hormones, and cell wall-related kinases in root development and root system architecture remodeling. These mechanisms play a determinant role in improving phosphorus use efficiency and aluminum resistance on acidic soils.
Low phosphate (Pi) availability and high aluminum (Al) toxicity constitute two major plant mineral nutritional stressors that limit plant productivity on acidic soils. Advances toward the identification of genes and signaling networks that are involved in both stresses in model plants such as Arabidopsis thaliana and rice (Oryza sativa), and in other plants as well have revealed that some factors such as organic acids (OAs), cell wall properties, phytohormones, and iron (Fe) homeostasis are interconnected with each other. Moreover, OAs are involved in recruiting of many plant-growth-promoting bacteria that are able to secrete both OAs and phosphatases to increase Pi availability and decrease Al toxicity. In this review paper, we summarize these mutual mechanisms by which plants deal with both Al toxicity and P starvation, with emphasis on OA secretion regulation, plant-growth-promoting bacteria, transcription factors, transporters, hormones, and cell wall-related kinases in the context of root development and root system architecture remodeling that plays a determinant role in improving P use efficiency and Al resistance on acidic soils.
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