Root Responses to Boron Deficiency Mediated by Ethylene

Frontiers in Plant Science
Agustín González-FontesJuan J Camacho-Cristóbal

Abstract

Low boron (B) supply alters the architecture of the root system in Arabidopsis thaliana seedlings, leading to a reduction in the primary root growth and an increase in the length and number of root hairs. At short-term (hours), B deficiency causes a decrease in the cell elongation of the primary root, resulting in a lower growth. Experimental approaches using ethylene insensitive Arabidopsis mutants, inhibitors of ethylene response, and GUS reporter lines suggest that ethylene is involved in these responses of the primary root to B deficiency. Furthermore, it has been shown that auxin participates in the inhibition of cell elongation under short-term B deprivation. These results support that an interaction between ethylene and auxin plays an important role in controlling the primary root elongation, in which a number of genes related to the synthesis, transport, and signaling of both phytohormones could modulate this effect. Evidence for a root cross-talk among both hormones and other possible intermediates (abscisic acid, calcium sensors, and reactive oxygen species) in response to B deficiency is provided and discussed.

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Citations

Sep 14, 2016·Frontiers in Plant Science·Katie A WilkinsJulia M Davies
Dec 10, 2016·Physiologia Plantarum·Miguel Ángel Macho-RiveroAgustín González-Fontes
Jun 26, 2018·International Journal of Molecular Sciences·Fareeha ShireenZhilong Bie
May 12, 2019·International Journal of Molecular Sciences·Carlos Quiles-PandoJesús Rexach
Aug 22, 2018·International Journal of Molecular Sciences·Jaroslav PavlůMartin Černý
Oct 29, 2020·Journal of Hazardous Materials·Harshita SinghShri Ram Yadav
Feb 3, 2021·Journal of Experimental Botany·Yupu HuangFangsen Xu
Dec 9, 2020·Journal of Integrative Plant Biology·Yupu HuangFangsen Xu

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