Contrasting responses of cluster roots formation induced by phosphorus and nitrogen supply in Embothrium coccineum populations from different geographical origin

Abstract

Aims Embothrium coccineum is a pioneer tree that produces cluster roots (CR) induced by phosphorus (P) or nitrogen (N) deficiency, but the role which both N and P play in CR formation for different E. coccineum populations is still unknown. We hypothesized that in E. coccineum, N influences the CR formation response, primarily induced by P limitation. However, this response depends on local adaptations to their specific conditions of geographic origin. M e t h o d s S e e d l i n g s f r o m t h r e e c o n t r a s t i n g edaphoclimatic conditions (Northern, Central and Southern populations) were grown in hydroponic culture under high and low N supply and at five different P

The impact of Pleistocene glaciations and environmental gradients on the genetic structure of Embothrium coccineum

“…In Embothrium, the presence of distinct ecotypes has been linked to differences in water accessibility, and the amount of snow coverage and the distribution of its ecotypes correspond to the genetic structure found using isoenzymatic genetic markers (Souto & Premoli, 2007). This correlation suggests that E. coccineum populations may be locally adapted to distinct environmental conditions across its distribution range (Bertin-Benavides et al, 2020;Souto & Premoli, 2007).…”

“…This correlation suggests that E . coccineum populations may be locally adapted to distinct environmental conditions across its distribution range (Bertin‐Benavides et al, 2020; Souto & Premoli, 2007).…”