Effects of silicon (Si) on growth, quality and ionic homeostasis of aloe under salt stress

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Abstract

The physiological characteristics of aloe irrigated with brackish water and the relationship with ameliorative effects of silicon (Si) nutrition were studied. Results of cultivation and analysis showed that 2.0mmol·L-1added Si significantly alleviated growth inhibition and quality reduction of aloe under 100mmol·L-1NaCl stress; added Si significantly reduced Na+content while increased K+content and K+/Na+ratio of salt stressed aloe plant, especially absorption and translocation selectivity of aloe root to K+and Na+were promoted, and ion homeostasis of aloe plant was kept well. Results of cross-sectional X-ray energy dispersive spectrum microanalysis of aloe root and leaf further confirmed the above findings. One of the mechanisms of silicon was its improvement to activity of plasma membrane H+-ATPase, tonoplast membrane H+-ATPase and H+-pyrophosphates of aloe root under salt stress.

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Xu, C. X., Ma, Y. P., & Liu, Y. L. (2015). Effects of silicon (Si) on growth, quality and ionic homeostasis of aloe under salt stress. South African Journal of Botany, 98, 26–36. https://doi.org/10.1016/j.sajb.2015.01.008

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