Repositorio
Institucional

Delgado, Mabel

Valle, Susana#Reyes-Diaz, Marjorie#Barra, Patricio J.#Zuniga-Feest, Alejandra

Nutrient Use Efficiency of Southern South America Proteaceae Species. Are there General Patterns in the Proteaceae Family?

FRONTIERS MEDIA SA

FRONTIERS IN PLANT SCIENCE

en

Plants from the Proteaceae family can thrive in old, impoverished soil with extremely low phosphorus (P) content, such as those typically found in South Western Australia (SWA) and South Africa. The South Western (SW) Australian Proteaceae species have developed strategies to deal with P scarcity, such as the high capacity to re-mobilize P from senescent to young leaves and the efficient use of P for carbon fixation. In Southern South America, six Proteaceae species grow in younger soils than those of SWA, with a wide variety of climatic and edaphic conditions. However, strategies in the nutrient use efficiency of Southern South (SS) American Proteaceae species growing in their natural ecosystems remain widely unknown. The aim of this study was to evaluate nutrient resorption efficiency and the photosynthetic nutrients use efficiency by SS American Proteaceae species, naturally growing in different sites along a very extensive latitudinal gradient. Mature and senescent leaves of the six SS American Proteaceae species (Embothrium coccineum, Gevuina avellana, Orites myrtoidea Lomatia hirsuta, L. ferruginea, and L. dentata), as well as, soil samples were collected in nine sites from southern Chile and were subjected to chemical analyses. Nutrient resorption (P and nitrogen) efficiency in leaves was estimated in all species inhabiting the nine sites evaluated, whereas, the photosynthetic P use efficiency (PPUE) and photosynthetic nitrogen (N) use efficiency (PNUE) per leaf unit were determined in two sites with contrasting nutrient availability. Our study exhibit for the first time a data set related to nutrient use efficiency in the leaves of the six SS American Proteaceae, revealing that for all species and sites, P and N resorption efficiencies were on average 47.7 and 50.6%, respectively. No correlation was found between leaf nutrient (P and N) resorption efficiency and soil attributes. Further, different responses in PPUE and PNUE were found among species and, contrary to our expectations, a higher nutrient use efficiency in the nutrient poorest soil was not found. We conclude that SS American Proteaceae species did not show a general pattern in the nutrient use efficiency among them neither with others Proteaceae species reported in the literature.

Artículo original

This study was financed by the Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) of Chilean government through FONDECYT Postdoctoral project No 3150187 (MD) and No 3170629 (PB), FONDECYT initiation project No 11170368 (MD), and FONDECYT Regular project No 1130440 and 1180699 (AZ-F)

Este estudio fue financiado por la Comisión Nacional de Investigación Científica y Tecnológica (CONICYT) del gobierno de Chile a través del proyecto postdoctoral FONDECYT No 3150187 (MD) y No 3170629 (PB), el proyecto de iniciación FONDECYT No 11170368 (MD) y el proyecto FONDECYT Regular No 1130440 y 1180699. (AZ-F)

10.3389/fpls.2018.00883

pdf

phosphorus and nitrogen use efficiency# photosynthesis rate# specific leaf area# cluster roots# chilean soils

http://dx.doi.org/10.3389/fpls.2018.00883

Plant Sciences

eficiencia en el uso de fósforo y nitrógeno# tasa de fotosíntesis# área foliar específica# raíces de racimo# suelos chilenos

Ecología

Botánica

Ciencias del suelo

WOS:000436441900002

Nutrient Use Efficiency of Southern South America Proteaceae Species. Are there General Patterns in the Proteaceae Family?

Artículo original

version publicada

FRONTIERS MEDIA SA

FRONTIERS IN PLANT SCIENCE

Ciencias de las plantas

1664-462X

en

ANID FONDECYT Postdoctoral 3150187#ANID FONDECYT Postdoctoral 3170629#ANID FONDECYT INICIACIÓN 11170368#ANID FONDECYT Regular 1130440#ANID FONDECYT Regular 1180699

ANID FONDECYT 3150187

ANID FONDECYT 3170629

ANID FONDECYT 1130440

ANID FONDECYT 1180699

This study was financed by the Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) of Chilean government through FONDECYT Postdoctoral project No 3150187 (MD) and No 3170629 (PB), FONDECYT initiation project No 11170368 (MD), and FONDECYT Regular project No 1130440 and 1180699 (AZ-F)

pdf

dorada#verde

acceso abierto

acceso abierto

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