Aluminium tolerance and stomata operation: Towards optimising crop performance in acid soil

Stomatal operation is crucial for optimising plant water and gas exchange and represents a major trait conferring abiotic stress tolerance in plants. About 56% of agricultural land around the globe is classified as acidic, and Al toxicity is a major limiting factor affecting plant performance in suc...

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Bibliographic Details
Published in:Plant physiology and biochemistry 2024-05, Vol.210, p.108626, Article 108626
Main Authors: Guo, Ce, Shabala, Sergey, Chen, Zhong-Hua, Zhou, Meixue, Zhao, Chenchen
Format: Article
Language:English
Subjects:
Abscisic acid
Aluminium toxicity
Guard cell
Reactive oxygen species
Stomatal density
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Summary:Stomatal operation is crucial for optimising plant water and gas exchange and represents a major trait conferring abiotic stress tolerance in plants. About 56% of agricultural land around the globe is classified as acidic, and Al toxicity is a major limiting factor affecting plant performance in such soils. While most of the research work in the field discusses the impact of major abiotic stresses such as drought or salinity on stomatal operation, the impact of toxic metals and, specifically aluminium (Al) on stomatal operation receives much less attention. We aim to fill this knowledge gap by summarizing the current knowledge of the adverse effects of acid soils on plant stomatal development and operation. We summarised the knowledge of stomatal responses to both long-term and transient Al exposure, explored molecular mechanisms underlying plant adaptations to Al toxicity, and elucidated regulatory networks that alleviate Al toxicity. It is shown that Al-induced stomatal closure involves regulations of core stomatal signalling components, such as ROS, NO, and CO2 and key elements of ABA signalling. We also discuss possible targets and pathway to modify stomatal operation in plants grown in acid soils thus reducing the impact of Al toxicity on plant growth and yield. •Acid soil (Aluminium) affects stomatal development.•Stomata responses to both long-term and transient Al exposure.•Aluminium-induced stomatal closure involves critical components of ABA signalling networks.•A putative pathway of Aluminium functioning on stomatal closure was presented.
ISSN:0981-9428
1873-2690
1873-2690
DOI:10.1016/j.plaphy.2024.108626