Aluminum

Genetic and molecular mechanisms of aluminum tolerance in plants

C. C. Simões, Melo, J. O., Magalhães, J. V., and Guimarães, C. T., Genetic and molecular mechanisms of aluminum tolerance in plants, vol. 11. pp. 1949-1957, 2012.

Aluminum (Al) toxicity restricts root growth and agricultural yield in acid soils, which constitute approximately 40% of the potentially arable lands worldwide. The two main mechanisms of Al tolerance in plants are internal detoxification of Al and its exclusion from root cells.

Aluminum triggers broad changes in microRNA expression in rice roots

J. C. Lima, Arenhart, R. A., Margis-Pinheiro, M., and Margis, R., Aluminum triggers broad changes in microRNA expression in rice roots, vol. 10, pp. 2817-2832, 2011.

MicroRNAs are small 21-nucleotide RNA molecules with regulatory roles in development and in response to stress. Expression of some plant miRNAs has been specifically associated with responses to abiotic stresses caused by cold, light, iron, and copper ions. In acid soils, aluminum solubility increases, thereby causing severe damage to plants. Although physiological aspects of aluminum toxicity in plants have been well characterized, the molecular mediators are not fully elucidated. There have been no reports about miRNA responses to aluminum stress.

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