SciELO - Scientific Electronic Library Online

 
vol.73 issue3Paddy plants inoculated with PGPR show better growth physiology and nutrient content under saline conditionEvaluation for fresh consumption of new broad bean genotypes with a determinate growth habit in central Chile author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Chilean journal of agricultural research

On-line version ISSN 0718-5839

Abstract

DONOSO-NANCULAO, Gabriel et al. Effect of auxin on cluster roots induction in Embothrium coccineum J.R. Forst. & G. Forst. in phosphorus deficiency condition. Chilean J. Agric. Res. [online]. 2013, vol.73, n.3, pp.220-224. ISSN 0718-5839.  http://dx.doi.org/10.4067/S0718-58392013000300003.

Auxins play an important role in cluster root (CR) development in some species under low P conditions. However, the mechanism for CR induction in Embothrium coccineum J.R. Forst. & G. Forst remains unknown. Therefore, the aim of this work was to determine the effect of auxin on CR induction in E. coccineum, under low P conditions. For this, plants of E. coccineum were grown under P sufficiency and deficiency, and were treated with exogenous auxin and an auxin transport inhibitor. Phosphorous concentration in leaves, proportion of the total root allocated to CR mass (CRA), CR number (CRN), CR mass (CRm), and individual CR mass (ICRm), were measured. The number of CR showed a negative correlation with P concentrations in leaves. Furthermore, application of auxin in plants grown under P deficiency increased the CRA in a 50% and CRN in a 60%. The values of all parameters measured in plants grown under P deficiency conditions were reduced to less than half that observed in control plants, after foliar application of auxin transport inhibitor. However, no difference was observed when auxin was applied in plants grown with P supply. These results suggest that P and auxin are important factors for CR induction in E. coccineum.

Keywords : Auxin transport inhibitor; naphthalene acetic acid; n-1-naphthylphthalamic acid; plant hormones.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License