scholarly journals Root exudation rate as functional trait involved in plant nutrient‐use strategy classification

2018 ◽  
Vol 8 (16) ◽  
pp. 8573-8581 ◽  
Author(s):  
Julien P. Guyonnet ◽  
Amélie A. M. Cantarel ◽  
Laurent Simon ◽  
Feth el Zahar Haichar
Keyword(s):  
Root Exudation ◽  
Functional Trait ◽  
Plant Nutrient ◽  
Nutrient Use ◽  
Strategy Classification ◽  
Exudation Rate

scholarly journals Biochar Amendment Alters the Nutrient-Use Strategy of Moso Bamboo Under N Additions

2021 ◽  
Vol 12 ◽  
Author(s):  
Jinpei Gao ◽  
Quan Li ◽  
Junbo Zhang ◽  
Kunkai Cui ◽  
Zhizhuang Wu ◽  
...  
Keyword(s):  
Soil Nutrient ◽  
Moso Bamboo ◽  
Nutrient Resorption ◽  
Nutrient Concentrations ◽  
Plant Nutrient ◽  
N Addition ◽  
Resorption Proficiency ◽  
Nutrient Use ◽  
Negative Effect ◽  
N Resorption

Nutrient resorption can affect plant growth, litter decomposition, and nutrient cycling. Although the effects of nitrogen (N) and biochar fertilizers on soil nutrient concentrations and plant nutrient uptake have been studied, an understanding of how combined applications of N and biochar affect plant nutrient resorption in plantations is lacking. In this study, we applied N (0, 30, 60, and 90 kg N ha−1 yr−1 defined as N0, N30, N60, and N90, respectively) and biochar (0, 20, and 40 t biochar ha−1 defined as BC0, BC20, and BC40, respectively) to the soil of a Moso bamboo plantation. We investigated the effects of these treatments on N and phosphorus (P) resorption by young and mature bamboo plants, as well as the relationships between nutrient resorption and leaf and soil nutrient concentrations. Young bamboo showed significantly greater foliar N resorption efficiency (NRE) and P resorption efficiency (PRE) than mature bamboo. N addition alone significantly increased the N resorption proficiency (NRP) and P resorption proficiency (PRP) but significantly decreased the NRE and PRE of both young and mature bamboo. In both the N-free and N-addition treatments, biochar amendments significantly reduced the foliar NRE and PRE of young bamboo but had the opposite effect on mature bamboo. Foliar NRE and PRE were significantly negatively correlated with fresh leaf N and P concentrations and soil total P concentration but significantly positively correlated with soil pH. Our findings suggest that N addition inhibits plant nutrient resorption and alters the nutrient-use strategy of young and mature bamboo from “conservative consumption” to “resource spending.” Furthermore, biochar amendment enhanced the negative effect of N addition on nutrient resorption in young bamboo but reduced the negative effect on that of mature bamboo under N-addition treatments. This study provides new insights into the combined effects of N and biochar on the nutrient resorption of Moso bamboo and may assist in improving fertilization strategies in Moso bamboo plantations.

scholarly journals Plant Nutrient Resource Use Strategies Shape Active Rhizosphere Microbiota Through Root Exudation

2018 ◽  
Vol 9 ◽  
Author(s):  
Julien P. Guyonnet ◽  
Martin Guillemet ◽  
Audrey Dubost ◽  
Laurent Simon ◽  
Philippe Ortet ◽  
...  
Keyword(s):  
Resource Use ◽  
Root Exudation ◽  
Plant Nutrient

scholarly journals A dynamic rhizosphere interplay between tree roots and soil bacteria under drought stress

2021 ◽  
Author(s):  
Yaarao Oppenheimer-Shaanan ◽  
Gilad Jakoby ◽  
Maya Laurenci Starr ◽  
Romiel Karliner ◽  
Gal Eilon ◽  
...  
Keyword(s):  
Forest Soil ◽  
Soil Bacteria ◽  
Bacterial Species ◽  
Root Exudation ◽  
Nitrogen Sources ◽  
Microbial Interactions ◽  
Tree Roots ◽  
Carbon And Nitrogen ◽  
Custom Made ◽  
Exudation Rate

<p>Root exudates are thought to play an important role in plant-microbial interactions. In return, soil bacteria can increase the bioavailability of soil minerals, which is typically decreasing in situations such as drought. Here we describe an exudate-driven microbial priming on <em>Cupressus</em> saplings grown outside in forest soil in custom-made rhizotron boxes. A 1-month imposed drought and inoculations with <em>Bacillus subtilis </em>and <em>Pseudomonas</em> <em>stutzeri</em>, bacteria species forest soil isolation, were applied in a factorial design. We revealed that both bacteria associated with <em>Cupressus</em> roots and were more abundant in rhizosphere than in bulk soil. Moreover, root exudation rate increased in inoculated trees under drought with >100 first identified metabolites from <em>Cupressus</em> roots. Among these metabolites, phenolic acid compounds, quinate, and others, were used as carbon and nitrogen sources by both bacterial species. Furthermore, soil phosphorous bioavailability was maintained only in inoculated trees, where a drought-induced decrease in leaf phosphorus and iron was prevented. We provide evidence that changes in exudation rate and composition under drought and bacteria inoculation, support the idea of root recruitment of beneficial bacteria. In turn, trees secreted further carbon source to the rhizosphere and hosted more bacteria, benefited from improved nutrition.</p>

Plant Nutrient Use

2011 ◽  
pp. 229-258 ◽  
Author(s):  
F. Stuart Chapin ◽  
Pamela A. Matson ◽  
Peter M. Vitousek
Keyword(s):  
Plant Nutrient ◽  
Nutrient Use

scholarly journals Root exudation of low-molecular-mass-organic acids by six tree species alters the dynamics of calcium and magnesium in soil

2016 ◽  
Vol 96 (2) ◽  
pp. 199-206 ◽  
Author(s):  
Tamihisa Ohta ◽  
Tsutom Hiura
Keyword(s):  
Organic Acids ◽  
Molecular Mass ◽  
Tree Species ◽  
Root Exudation ◽  
Oyster Shell ◽  
Exchangeable Cations ◽  
Nutrient Concentrations ◽  
Ca Deficiency ◽  
Exchangeable Ca ◽  
Exudation Rate

Soils in plantations of Cryptomeria japonica in Japan have ∼threefold more exchangeable Ca compared with soils in other types of forest vegetation even in a Ca-poor environment. To explain mechanisms underlying this phenomenon, we determined the effect of root exudation rate of low-molecular-mass organic acids (LMMOAs) on exchangeable cations in soil. We conducted a pot experiment using C. japonica and five dominant tree species in Japan, and measured the root exudation rates of LMMOAs and exchangeable nutrient concentrations in the soils. To estimate whether the root exudation rate of LMMOAs is elevated in response to Ca deficiency, we created variation in Ca availability by adding different amounts of crushed oyster shells. The root exudation rates of LMMOAs were two to five times higher for C. japonica than for other tree species, but did not differ significantly among the different quantities of oyster shell. Exchangeable Ca and Mg were significantly higher in the soils with C. japonica and significantly correlated with the root exudation rate of LMMOAs (R2 > 0.24) at high and moderate quantities of oyster shell. Therefore, variation among species, in terms of root exudation of organic acids, might be one important factor affecting the cation dynamics in soil.

Shifts in plant nutrient use strategies under secondary forest succession

2006 ◽  
Vol 289 (1-2) ◽  
pp. 187-197 ◽  
Author(s):  
En-Rong Yan ◽  
Xi-Hua Wang ◽  
Jian-Jun Huang
Keyword(s):  
Forest Succession ◽  
Secondary Forest ◽  
Plant Nutrient ◽  
Secondary Forest Succession ◽  
Nutrient Use

What controls plant nutrient use in high elevation ecosystems?

Oecologia ◽  
2013 ◽  
Vol 173 (4) ◽  
pp. 1551-1561 ◽  
Author(s):  
S. C. Castle ◽  
J. C. Neff
Keyword(s):  
High Elevation ◽  
Plant Nutrient ◽  
Nutrient Use

scholarly journals Root functional traits explain root exudation rate and composition across a range of grassland species

2021 ◽  
Author(s):  
Alex Williams ◽  
Holly Langridge ◽  
Angela L. Straathof ◽  
Howbeer Muhamadali ◽  
Katherine A. Hollywood ◽  
...  
Keyword(s):  
Functional Traits ◽  
Root Exudation ◽  
Grassland Species ◽  
Root Functional Traits ◽  
Exudation Rate
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