Arbuscular mycorrhizae and absence of cluster roots in the Brazilian Proteaceae Roupala montana Aubl.

Kelly da Silva Coutinho Detmann , Tiago de Souza Leite , Ricardo Rodrigues de Oliveira Neto , Marina Neves Delgado , Vitor Paiva Alcoforado Rebello , Aristéa Alves Azevedo , Maria Catarina Megumi Kasuya , Marc-Andre Selosse , Andréa Miyasaka de Almeida


Plants growing on soils poor in phosphorus (P) develop P-acquisition strategies such as symbiotic associations with arbuscular mycorrhizal fungi (AMF). In very poor soils, cluster roots, a non-symbiotic alternative strategy enables plants to extract P uptake by developing modified roots. The latter strategy is characteristic (if not a derived trait) of the Southern Hemisphere Proteaceae, which are thus non-mycorrhizal. The Proteaceae have been studied mainly in Australia,where they are very diverse, especially on very P-poor soils.We investigated the presence of cluster roots and/orAMF in the Proteaceae Roupala montana Aubl. from three areas of the Brazilian Cerrado. This is, a seasonal neotropical savanna on highly weathered soils characterised by high aluminium content, low pH, and very low available P.We discovered that R. montana forms arbuscular mycorrhiza and no cluster roots were observed. All the plantlets collected were mycorrhizal.We also evaluated the fertility of the soil (especially the P availability). It was found that R. montana grows in soils containing more than 220 mg kg−1 total P. Thus, they are, more fertile than in most of Australian soils and likely have sufficient available P to support plant nutrition by way of mycorrhizae. Further research should investigate whether other Brazilian, and more generally non-Australian, Proteaceae species can establish associations with AMF, and the link with soil P availability. Our findings have implications for the phylogenetic patterns of loss of symbiosis with AMF within the Proteaceae.
Author Kelly da Silva Coutinho Detmann
Kelly da Silva Coutinho Detmann,,
, Tiago de Souza Leite
Tiago de Souza Leite,,
, Ricardo Rodrigues de Oliveira Neto
Ricardo Rodrigues de Oliveira Neto,,
, Marina Neves Delgado
Marina Neves Delgado,,
, Vitor Paiva Alcoforado Rebello
Vitor Paiva Alcoforado Rebello,,
, Aristéa Alves Azevedo
Aristéa Alves Azevedo,,
, Maria Catarina Megumi Kasuya
Maria Catarina Megumi Kasuya,,
, Marc-Andre Selosse (FB / DPTNC)
Marc-Andre Selosse,,
- Department of Plant Taxonomy and Nature Conservation
, Andréa Miyasaka de Almeida
Andréa Miyasaka de Almeida,,
Journal seriesSymbiosis, ISSN 0334-5114, (N/A 70 pkt)
Issue year2019
Publication size in sheets0.5
Keywords in EnglishArbuscular mycorrhiza, Cerrado, cluster roots, nutrient-acquisition strategy, phosphorus concentration
ASJC Classification1100 General Agricultural and Biological Sciences
Languageen angielski
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 28-01-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.835; WoS Impact Factor: 2018 = 2.009 (2) - 2018=1.793 (5)
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