@Article{LugliAACCFMMOQRSVH:2020:MuPhAc,
author = "Lugli, Laynara F. and Andersen, Kelly M. and Arag{\~a}o, Luiz
Eduardo Oliveira e Cruz de and Cordeiro, Amanda L. and Cunha,
Hellen F. V. and Fuchslueger, Lucia and Meir, Patrick and Mercado,
Lina M. and Oblitas, Erick and Quesada, Carlos A. and Rosa,
Jessica S. and Schaap, Karst J. and Valverde-Barrantes, Oscar and
Hartley, Iain P.",
affiliation = "{University of Exeter} and {University of Exeter} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas da Amazonia (INPA)} and {Instituto Nacional de Pesquisas
da Amazonia (INPA)} and {Instituto Nacional de Pesquisas da
Amazonia (INPA)} and {University of Edinburgh} and {University of
Exeter} and {Instituto Nacional de Pesquisas da Amazonia (INPA)}
and {Instituto Nacional de Pesquisas da Amazonia (INPA)} and
{Instituto Nacional de Pesquisas da Amazonia (INPA)} and
{Instituto Nacional de Pesquisas da Amazonia (INPA)} and
{Instituto Nacional de Pesquisas da Amazonia (INPA)} and
{University of Exeter}",
title = "Multiple phosphorus acquisition strategies adopted by fine roots
in low-fertility soils in Central Amazonia",
journal = "Plant and Soil",
year = "2020",
volume = "450",
number = "1/2",
pages = "49--63",
month = "May",
keywords = "Amazon . Arbuscular mycorrhizas. Lowland tropical forest . Root
phosphatase activity. Phosphorus limitation . Root morphology.",
abstract = "Background and aims Ancient Amazon soils are characterised by low
concentrations of soil phosphorus (P). Therefore, it is
hypothesised that plants may invest a substantial proportion of
their resources belowground to adjust their P-uptake strategies,
including root morphological, physiological (phosphatase enzyme
activities) and biotic (arbuscular mycorrhizal (AM) associations)
adaptations. Since these strategies are energy demanding, we
hypothesise that trade-offs between morphological traits and root
phosphatase exudation and symbiotic associations would occur.
Specifically, we expected that plants which invest in finer roots,
and therefore have greater ability to explore large soil volumes,
would have a high investment in physiological adaptations such as
enhanced phosphatase production. In contrast, we expected that
plants with predominantly thicker roots would invest more in
symbiotic associations, in which carbon is traded for P acquired
from AM fungal communities. Methods We collected absorptive roots
(<2 mm diameter) from a lowland Central Amazon forest near Manaus,
Brazil. We measured fine root diameter, specific root length
(SRL), specific root area (SRA), root tissue density (RTD), root
phosphatase activity (APase) and arbuscular mycorrhizal (AM) fungi
colonisation. Results Root morphological traits were related to
APase activity, with higher APase activity in roots with higher
SRL and SRA but lower RTD. However, the degree of AM colonisation
was not related to any measured root morphological trait.
Conclusions Fine absorptive roots likely benefit from having low
RTD, high SRL, SRA and APase exudation to acquire P efficiently.
However, because AM colonisation was not related to root
morphology, we suggest that investment in multiple P-uptake
strategies is required for maintaining productivity in Central
Amazon forests.",
doi = "10.1007/s11104-019-03963-9",
url = "http://dx.doi.org/10.1007/s11104-019-03963-9",
issn = "0032-079X",
label = "self-archiving-INPE-MCTIC-GOV-BR",
language = "en",
targetfile = "lugli_multiple.pdf",
urlaccessdate = "28 mar. 2024"
}