Mechanisms of organic acids and boron induced tolerance of aluminum toxicity: A review

Ecotoxicology and Environmental Safety
Muhammad RiazCuncang Jiang

Abstract

Aluminum is a major limiting abiotic factor for plant growth and productivity on acidic soils. The primary disorder of aluminum toxicity is the rapid cessation of root elongation. The root apex is the most sensitive part of this organ. Although significant literature evidence and hypothesis exist on aluminum toxicity, the explicit mechanism through which aluminum ceases root growth is still indefinable. The mechanisms of tolerance in plants have been the focus of intense research. Some plant species growing on acidic soils have developed tolerance mechanisms to overcome and mitigate aluminum toxicity, either by avoiding entry of Al3+ into roots (exclusion mechanism) or by being able to counterbalance toxic Al3+ engrossed by the root system (internal tolerance mechanism). Genes belonging to ALMT (Aluminum-activated malate transporter) and MATE (Multidrug and toxin compounds extrusion) have been identified that are involved in the aluminum-activated secretion of organic acids from roots. However, different plant species show different gene expression pattern. On the other hand, boron (B) (indispensable micronutrient) is a promising nutrient in the tolerance to aluminum toxicity. It not only hinders the adsorption of aluminum to t...Continue Reading

Citations

Feb 23, 2020·Environmental Science and Pollution Research International·Huidong MaliangJianyi Ma
Jul 25, 2020·Scientific Reports·Rajpal Shetty, Nagabovanalli Basavarajappa Prakash
Nov 7, 2019·Frontiers in Plant Science·Miriam Szurman-ZubrzyckaIwona Szarejko
Oct 24, 2020·The Science of the Total Environment·Rajpal ShettyMarek Vaculík
Nov 18, 2020·International Journal of Molecular Sciences·Joanna JaskowiakIwona Szarejko
Sep 12, 2020·Toxicology Reports·Sarine El DaoukMohamad Al Iskandarani
Apr 4, 2021·Plants·Paola I Angulo-BejaranoRocío Cruz-Ortega

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