scholarly journals Removal of soil biota alters soil feedback effects on plant growth and defense chemistry

2018 ◽  
Vol 221 (3) ◽  
pp. 1478-1491 ◽  
Author(s):  
Minggang Wang ◽  
Weibin Ruan ◽  
Olga Kostenko ◽  
Sabrina Carvalho ◽  
S. Emilia Hannula ◽  
...  

2019 ◽  
Author(s):  
Rodrigo Alegria Terrazas ◽  
Senga Robertson-Albertyn ◽  
Aileen Mary Corral ◽  
Carmen Escudero-Martinez ◽  
Katharin Balbirnie-Cumming ◽  
...  

AbstractBackgroundSince the dawn of agriculture, human selection on plants has progressively differentiated input-demanding productive crops from their wild progenitors thriving in marginal areas. Barley (Hordeum vulgare), the fourth most cultivated cereal globally, is a prime example of this process. We previously demonstrated that wild and domesticated barley genotypes host distinct microbial communities in their rhizosphere. Here, we tested the hypothesis that microbiota diversification is modulated by, and responds to, nitrogen (N) application in soil and assessed the impact of microbiota taxonomic and functional compositions on plant growth.MethodsWe grew two wild (H. vulgare ssp. spontaneum) and an ‘Elite’ domesticated (H. vulgare ssp. vulgare) barley genotypes in an agricultural soil treated with and without N inputs. By using a two-pronged 16S rRNA gene amplicon sequencing and comparative metagenomics approach, we determined the impact of N application on taxonomic composition and metabolic potential of the microbial communities exposed to limiting and replete N supplies. We then implemented a plant-soil feedback experiment to assess microbiotas’ recruitment cues and contribution to plant growth.ResultsN availability emerged as a modulator of the recruitment cues of the barley bacterial microbiota as evidenced by the increased number of bacterial genera differentially recruited between unplanted soil and rhizosphere communities under N-limiting conditions. This recruitment pattern mirrored the impact of the host genotype on rhizosphere bacteria. The characterisation of the assembled metagenomes of plants exposed to N-limiting conditions revealed a metabolic specialisation of the rhizosphere microbiota compared to unplanted soil controls. This specialisation is underpinned predominantly by bacteria and is manifested by the enrichment of a core set of biological processes sustaining the adaptation of polymicrobial communities such as N utilisation, quorum sensing and motility across genotypes. The quantitative variation in a group of these biological processes defined host signatures in the barley rhizosphere metagenome. Finally, a plant-soil feedback experiment revealed that the host-mediated taxonomic diversification of the bacterial microbiota is associated with barley growth under sub-optimal N supplies.ConclusionsOur results suggest that under N limiting conditions, a substrate-driven selection process underpins the assembly of barley rhizosphere microbiota. Host-microbe and microbe-microbe interactions fine-tune this process at the taxonomic and functional level across kingdoms. The disruption of these recruitment cues negatively impacts plant growth.



2021 ◽  
Author(s):  
Xuemei Wang ◽  
Bangguo Yan ◽  
Liangtao Shi ◽  
Gangcai Liu

Abstract Biotic plant-soil feedback has been widely studied, and may be particularly important in resource-poor areas. However, the roles of soil nutrient cycling in affecting plant growth in this process still remained unclear. The aim of this study was to explore the roles of soil biota in regulating nutrient cycling by conducting a two-phase feedback experiment in a dry-hot valley, with a conditioning phase during which there were Dodonaea viscosa or no D. viscosa growing in the soil, and a feedback phase in which the effect of the conditioned soil biota on D. viscosa performance was measured. The growth of D. viscosa significantly reduced soil N after the conditioning phase. However, D. viscosa showed a positive plant-soil feedback. In the feedback phase, the D. viscosa conditioned soil promoted the stem diameter, leaf area, and leaf dry mass content of D. viscosa. Total biomass was also significantly higher in D. viscosa conditioned soil than that in not conditioned soil. In contrast, soil sterilization had a negative effect on the growth of D. viscosa, with a significant reduction in plant biomass, especially in D. viscosa conditioned soil, and soil sterilization significantly increased the root: shoot biomass ratio and litter mass. Furthermore, we showed that although the biota-driven changes in enzyme activities correlated with the leaf N and P amount especially P amount, the enzyme activity was not the main reason to promote D. viscosa growth in the conditioned soil.



Plant Ecology ◽  
2021 ◽  
Vol 222 (11) ◽  
pp. 1209-1224
Author(s):  
Xuemei Wang ◽  
Bangguo Yan ◽  
Liangtao Shi ◽  
Gangcai Liu


2008 ◽  
Vol 40 (11) ◽  
pp. 2891-2897 ◽  
Author(s):  
Louise I. Sørensen ◽  
Minna-Maarit Kytöviita ◽  
Johan Olofsson ◽  
Juha Mikola
Keyword(s):  


2015 ◽  
Vol 91 ◽  
pp. 50-57 ◽  
Author(s):  
Qi Li ◽  
Yue Yang ◽  
Xuelian Bao ◽  
Fang Liu ◽  
Wenju Liang ◽  
...  


2016 ◽  
Vol 104 (5) ◽  
pp. 1243-1249 ◽  
Author(s):  
Conrad Schittko ◽  
Christian Runge ◽  
Marek Strupp ◽  
Sascha Wolff ◽  
Susanne Wurst


2005 ◽  
Vol 37 (11) ◽  
pp. 2077-2087 ◽  
Author(s):  
E. Pernilla Brinkman ◽  
Sep R. Troelstra ◽  
Wim H. van der Putten


2019 ◽  
Vol 225 (3) ◽  
pp. 1343-1354 ◽  
Author(s):  
Tereza Klinerová ◽  
Petr Dostál


2017 ◽  
Vol 8 ◽  
Author(s):  
Hai-Kun Ma ◽  
Ana Pineda ◽  
Andre W. G. van der Wurff ◽  
Ciska Raaijmakers ◽  
T. M. Bezemer


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