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Soil microbial community composition changes according to the tillage practice and plant development stage

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Soil microbial community composition changes according to

the tillage practice and plant development stage

Agricultural practices have a strong impact on

soil bacterial and fungal community composition

. Furthermore, microbial community composition can change with the stage of plant

development. We are interested in exploring these effects in relation to changes induced by

agriculture

(conventional and reduced tillage) and

plant stage

(germination and flowering) in soil conditions. Here, instead of examining this impact at a high taxonomic level such as phylum and/or class, thus missing potentially relevant information from lower levels, we propose an

original

method

: exploiting the available sequence information at the lowest taxonomic level attainable for each operational taxonomic unit.

C

ONTEXT

(1) Soil

sampling

on Faba bean agricultural field

M

ETHOD

1

2

(4) Sequences

analysis using the

mothur

pipeline (5) Microbial compositon analysis using

ordination

methods (2)

DNA

extraction (3) Massive sequencing using

454

technology

R

ESULTS

Their abundance are higher at

flowering

stage.

Their abundance are higher under

conventional

tillage.

3

B

ACTERIA

F

UNGI

Their abundance are higher at

flowering

stage.

Their abundance are

higher at

germination

stage.

F. Degrune

12

, M. Dufrêne

3

, B. Taminiau

4

, S. Barbieux

15

, M-P. Hiel

16

, G. Daube

4

, C. Nezer

7

, M. Vandenbol

2

1AgricultureIsLife, 2Unité de Microbiologie et Génomique, 6Unité de Phytotechnie des Régions Tempérées et Ferme expérimentale, 3Unité Biodiversité et Paysage, and 5Unité Système

Sol-Eau (Gembloux Agro-Bio tech, Ulg , Belgium), 4 Unité de Microbiologie des Aliments, Faculté de médecine vétérinaire (ULg, Belgium), 7Quality Partner s.a. (Herstal, Belgium)

• There was no effect of tillage

practice on fungal communities

over plant stage development,

• P and K could explained the

variation due to the soil tillage,

• NO3 and humidity could

explained the variation due to

the plant stage.

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