Root responses to boron deficiency mediated by ethylene

Frontiers in Plant Science

Juan J. eCamacho-Cristóbal¹  M. Teresa eNavarro-Gochicoa¹  Agustín eGonzález-Fontes¹  Esperanza M. eMartín-Rejano¹  M. Begoña eHerrera-Rodríguez¹  Jesús eRexach¹ 

[1]Universidad Pablo de Olavide

关键词: Abscisic Acid;    Calcium Signaling;    Reactive Oxygen Species;    root hairs;    ethylene;    auxin;   

DOI  :  10.3389/fpls.2015.01103

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown