The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Brett Robinson - One of the best experts on this subject based on the ideXlab platform.
-
Response of a Pioneering Species (Leptospermum scoparium J.R.Forst. & G.Forst.) to Heterogeneity in a Low-Fertility Soil
Frontiers in Plant Science, 2019Co-Authors: Maria Jesus Gutiérrez-ginés, Engracia Madejón, Niklas J. Lehto, Roger D. Mclenaghen, Jacqui Horswell, Nicholas M. Dickinson, Brett RobinsonAbstract:Root foraging may increase Plant Nutrient acquisition at the cost of reducing the total volume of soil explored, thereby reducing the chance of the roots encountering additional patches. Patches in soil seldom contain just one Nutrient: the patch may also have distinct textural, hydrological, and toxicological characteristics. We sought to determine the characteristics of root foraging by a pioneering species, Leptospermum scoparium, using pot trials and rhizobox experiments with patches of biosolids. The growth of L. scoparium was increased by
Takehiro Kamiya - One of the best experts on this subject based on the ideXlab platform.
-
A receptor-like kinase mutant with absent endodermal diffusion barrier displays selective Nutrient homeostasis defects.
eLife, 2014Co-Authors: Alexandre Pfister, Marie Barberon, Julien Alassimone, Misako Yamazaki, Joop E.m. Vermeer, Lothar Kalmbach, Christophe Maurel, Yuree Lee, Junpei Takano, Takehiro KamiyaAbstract:The endodermis represents the main barrier to extracellular diffusion in Plant roots, and it is central to current models of Plant Nutrient uptake. Despite this, little is known about the genes setting up this endodermal barrier. In this study, we report the identification and characterization of a strong barrier mutant, schengen3 (sgn3). We observe a surprising ability of the mutant to maintain Nutrient homeostasis, but demonstrate a major defect in maintaining sufficient levels of the macroNutrient potassium. We show that SGN3/GASSHO1 is a receptor-like kinase that is necessary for localizing CASPARIAN STRIP DOMAIN PROTEINS (CASPs)--major players of endodermal differentiation--into an uninterrupted, ring-like domain. SGN3 appears to localize into a broader band, embedding growing CASP microdomains. The discovery of SGN3 strongly advances our ability to interrogate mechanisms of Plant Nutrient homeostasis and provides a novel actor for localized microdomain formation at the endodermal plasma membrane.
-
a receptor like kinase mutant with absent endodermal diffusion barrier displays selective Nutrient homeostasis defects
eLife, 2014Co-Authors: Alexandre Pfister, Marie Barberon, Julien Alassimone, Misako Yamazaki, Joop E.m. Vermeer, Lothar Kalmbach, Christophe Maurel, Yuree Lee, Junpei Takano, Takehiro KamiyaAbstract:The endodermis represents the main barrier to extracellular diffusion in Plant roots, and it is central to current models of Plant Nutrient uptake. Despite this, little is known about the genes setting up this endodermal barrier. In this study, we report the identification and characterization of a strong barrier mutant, schengen3 (sgn3). We observe a surprising ability of the mutant to maintain Nutrient homeostasis, but demonstrate a major defect in maintaining sufficient levels of the macroNutrient potassium. We show that SGN3/GASSHO1 is a receptor-like kinase that is necessary for localizing CASPARIAN STRIP DOMAIN PROTEINS (CASPs)—major players of endodermal differentiation—into an uninterrupted, ring-like domain. SGN3 appears to localize into a broader band, embedding growing CASP microdomains. The discovery of SGN3 strongly advances our ability to interrogate mechanisms of Plant Nutrient homeostasis and provides a novel actor for localized microdomain formation at the endodermal plasma membrane. DOI: http://dx.doi.org/10.7554/eLife.03115.001
Maria Jesus Gutiérrez-ginés - One of the best experts on this subject based on the ideXlab platform.
-
Response of a Pioneering Species (Leptospermum scoparium J.R.Forst. & G.Forst.) to Heterogeneity in a Low-Fertility Soil
Frontiers in Plant Science, 2019Co-Authors: Maria Jesus Gutiérrez-ginés, Engracia Madejón, Niklas J. Lehto, Roger D. Mclenaghen, Jacqui Horswell, Nicholas M. Dickinson, Brett RobinsonAbstract:Root foraging may increase Plant Nutrient acquisition at the cost of reducing the total volume of soil explored, thereby reducing the chance of the roots encountering additional patches. Patches in soil seldom contain just one Nutrient: the patch may also have distinct textural, hydrological, and toxicological characteristics. We sought to determine the characteristics of root foraging by a pioneering species, Leptospermum scoparium, using pot trials and rhizobox experiments with patches of biosolids. The growth of L. scoparium was increased by
-
Data_Sheet_1_Response of a Pioneering Species (Leptospermum scoparium J.R.Forst. & G.Forst.) to Heterogeneity in a Low-Fertility Soil.PDF
2019Co-Authors: Maria Jesus Gutiérrez-ginés, Engracia Madejón, Niklas J. Lehto, Roger D. Mclenaghen, Jacqui Horswell, Nicholas Dickinson, Brett H. RobinsonAbstract:Root foraging may increase Plant Nutrient acquisition at the cost of reducing the total volume of soil explored, thereby reducing the chance of the roots encountering additional patches. Patches in soil seldom contain just one Nutrient: the patch may also have distinct textural, hydrological, and toxicological characteristics. We sought to determine the characteristics of root foraging by a pioneering species, Leptospermum scoparium, using pot trials and rhizobox experiments with patches of biosolids. The growth of L. scoparium was increased by
Hans Lambers - One of the best experts on this subject based on the ideXlab platform.
-
Diversity of Plant Nutrient-acquisition strategies increases during long-term ecosystem development
Nature Plants, 2015Co-Authors: Graham Zemunik, Benjamin L. Turner, Hans Lambers, Etienne LalibertéAbstract:Studies of Plants on a series of Australian sand dunes show that leaves and roots have different approaches to coping with phosphorus limitation. While leaves concentrate on using phosphorus efficiently, roots take on rich and diverse Nutrient-acquisition strategies. Plant species diversity increases as soil phosphorus availability declines during long-term ecosystem development^ 1 , 2 . The increase in Plant species diversity is associated with a decline in above-ground functional diversity, because leaf traits converge on a high phosphorus-use efficiency strategy on old and infertile soils^ 3 , 4 . In contrast, the response of below-ground traits that directly influence Nutrient acquisition remains poorly understood^ 3 , 5 ; yet it might be key to understanding how soil fertility drives patterns of Plant species diversity^ 1 . Here we show a marked increase in the richness and diversity of Plant Nutrient-acquisition strategies with declining soil phosphorus availability during long-term ecosystem development in a global biodiversity hotspot. Almost all Nutrient-acquisition strategies currently known were found in Plants from the most infertile soils, despite these being some of the most phosphorus-impoverished soils on Earth. Mycorrhizal Plants declined in relative abundance by >30%, although the decline was compensated by an increase in non-mycorrhizal, carboxylate-exuding species that ‘mine’ phosphorus from the soil using different strategies. Plant species richness within individual Nutrient-acquisition strategies also increased dramatically, with the species richness of many strategies more than doubling between the youngest and oldest soils. These results reveal increasing functional diversity of below-ground traits related to Nutrient acquisition during ecosystem development, suggesting that no single combination of traits, including those related to Nutrient-acquisition strategies, is superior to all others at extremely low soil fertility. Furthermore, the increasing diversity of Nutrient-acquisition strategies with declining soil fertility, despite functional convergence of above-ground traits^ 4 , 6 , suggests that fundamentally different Plant community assembly processes operate above- and below-ground.
-
Plant Nutrient acquisition strategies change with soil age
Trends in Ecology and Evolution, 2008Co-Authors: Hans Lambers, John A Raven, Gaius R Shaver, Sally E SmithAbstract:Nitrogen (N) tends to limit Plant productivity on young soils; phosphorus (P) becomes increasingly limiting in ancient soils because it gradually disappears through leaching and erosion. Plant traits that are regarded as adaptations to N- and P-limited conditions include mycorrhizas and cluster roots. Mycorrhizas 'scavenge' P from solution or 'mine' insoluble organic N. Cluster roots function in severely P-impoverished landscapes, 'mining' P fixed as insoluble inorganic phosphates. The 'scavenging' and 'mining' strategies of mycorrhizal species without and non-mycorrhizal species with cluster roots, respectively, allow functioning on soils that differ markedly in P availability. Based on recent advances in our understanding of these contrasting strategies of Nutrient acquisition, we provide an explanation for the distribution of mycorrhizal species on less P-impoverished soils, and for why, globally, cluster-bearing species dominate on severely P-impoverished, ancient soils, where P sensitivity is relatively common.
Timothy R Cavagnaro - One of the best experts on this subject based on the ideXlab platform.
-
mycorrhizal fungi enhance Plant Nutrient acquisition and modulate nitrogen loss with variable water regimes
Global Change Biology, 2018Co-Authors: Timothy M Bowles, Louise E Jackson, Timothy R CavagnaroAbstract:Climate change will alter both the amount and pattern of precipitation and soil water availability, which will directly affect Plant growth and Nutrient acquisition, and potentially, ecosystem functions like Nutrient cycling and losses as well. Given their role in facilitating Plant Nutrient acquisition and water stress resistance, arbuscular mycorrhizal (AM) fungi may modulate the effects of changing water availability on Plants and ecosystem functions. The well-characterized mycorrhizal tomato (Solanum lycopersicum L.) genotype 76R (referred to as MYC+) and the mutant mycorrhiza-defective tomato genotype rmc were grown in microcosms in a glasshouse experiment manipulating both the pattern and amount of water supply in unsterilized field soil. Following 4 weeks of differing water regimes, we tested how AM fungi affected Plant productivity and Nutrient acquisition, short-term interception of a 15NH4+ pulse, and inorganic nitrogen (N) leaching from microcosms. AM fungi enhanced Plant Nutrient acquisition with both lower and more variable water availability, for instance increasing Plant P uptake more with a pulsed water supply compared to a regular supply and increasing shoot N concentration more when lower water amounts were applied. Although uptake of the short-term 15NH4+ pulse was higher in rmc Plants, possibly due to higher N demand, AM fungi subtly modulated NO3- leaching, decreasing losses by 54% at low and high water levels in the regular water regime, with small absolute amounts of NO3- leached (<1 kg N ha−1). Since this study shows that AM fungi will likely be an important moderator of Plant and ecosystem responses to adverse effects of more variable precipitation, management strategies that bolster AM fungal communities may in turn create systems that are more resilient to these changes. This article is protected by copyright. All rights reserved.
-
arbuscular mycorrhizas and their role in Plant growth nitrogen interception and soil gas efflux in an organic production system
Plant and Soil, 2012Co-Authors: Timothy R Cavagnaro, Felipe H Barriosmasias, Louise E JacksonAbstract:Background and aims Roots and mycorrhizas play an important role in not only Plant Nutrient acquisition, but also ecosystem Nutrient cycling.
