Reduced belowground allocation of freshly assimilated C contributes to negative plant-soil feedback in successive winter wheat rotations DOI Creative Commons
Nikolaos Kaloterakis, Sirgit Kummer, Samuel Le Gall

и другие.

Plant and Soil, Год журнала: 2024, Номер unknown

Опубликована: Май 6, 2024

Abstract Aims Successive winter wheat (WW) rotations are associated with yield reduction, often attributed to the unfavorable soil microbes that persist in through plant residues. How rotational positions of WW affect allocation freshly assimilated carbon (C), an energy source for microbes, above and belowground remains largely unknown. Methods A 13 CO 2 pulse labeling rhizotron experiment was conducted greenhouse study fixed C patterns. grown after oilseed rape (W1), one season (W2), three successive seasons (W4). We used automatic manifold system measure excess respiration at six depths five different dates. Excess also measured dissolved organic (DOC), microbial biomass pools. Results There a strong decline accompanied by distinct changes root growth. Higher W1 compared W4, especially topsoil during later growth stages. DOC traced W4 W2. Less taken up rotations. Conclusions Our demonstrates mechanism which position affects belowground. sustains longer time than successively incorporates more this its biomass.

Язык: Английский

Drought Impacts on Plant–Soil Carbon Allocation—Integrating Future Mean Climatic Conditions DOI Creative Commons
Vinzent Leyrer,

Juliet A. Blum,

Sven Marhan

и другие.

Global Change Biology, Год журнала: 2025, Номер 31(2)

Опубликована: Фев. 1, 2025

ABSTRACT Droughts affect soil microbial abundance and functions—key parameters of plant–soil carbon (C) allocation dynamics. However, the impact drought may be modified by mean climatic conditions to which microbiome has previously been exposed. In a future warmer drier world, effects therefore differ from those observed in studies that simulate under current conditions. To investigate this, we used field experiment ‘Hohenheim Climate Change,’ an arable where predicted had simulated for 12 years. April 2021, exposed this agroecosystem 8 weeks with subsequent rewetting. Before drought, at peak after rewetting, pulse‐labelled winter wheat situ 13 CO 2 trace recently assimilated C plants microorganisms back atmosphere. Severe decreased respiration (−35%) gram‐positive bacteria (−15%) but no effect on gram‐negative bacteria, fungi, total biomass C. This pattern was not affected precipitation regime microbes pre‐exposed. Reduced had, however, legacy decreasing proportion allocated pool (−50%). Apart that, continuous warming important driver fluxes throughout our experiment, increasing plant biomass, root sugar concentration, labile C, respiration. Warming also shifted toward utilizing organic matter as source instead compounds. Our study found moderate shifts patterns can impose how plant‐derived is temperate during drought. The overarching warming, suggests agroecosystems respond will mainly temperature increases.

Язык: Английский

Процитировано

1
Rotational diversity shapes the bacterial and archaeal communities and confers positive plant-soil feedback in winter wheat rotations DOI Creative Commons
Nikolaos Kaloterakis, Adriana Giongo, Andrea Braun-Kiewnick

и другие.

Soil Biology and Biochemistry, Год журнала: 2025, Номер unknown, С. 109729 - 109729

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0
Potential mode of action of multispecies inoculums on wheat growth under water stress DOI Open Access
Asmaâ Agoussar, Julien Tremblay, Étienne Yergeau

и другие.

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Abstract Manipulating microbial communities could increase crop resistance to environmental stressors such as drought. It is, however, not clear what would be the best approach do so and traits are important. Here, we first compare multispecies inoculums created using different approaches. The only inoculum that increased wheat fresh biomass under drought was one from 25 isolates had showed a capacity grow high osmolarity. We then looked at two potential mechanisms of action this inoculum: 1) direct action, by sequencing screening genomes inoculated bacteria, 2) indirect 16S rRNA gene ITS region rhizosphere, root leaves communities. microbes in harbored many related plant growth promoting, competition water stress resistance. inoculation also resulted significant shifts associated with wheat, including some microorganisms previously reported improve conclude studied here because it potentially acted on fronts: directly, through selected for, indirectly, inducing resident

Язык: Английский

Процитировано

0
Reduced belowground allocation of freshly assimilated C contributes to negative plant-soil feedback in successive winter wheat rotations DOI Creative Commons
Nikolaos Kaloterakis, Sirgit Kummer, Samuel Le Gall

и другие.

Plant and Soil, Год журнала: 2024, Номер unknown

Опубликована: Май 6, 2024

Abstract Aims Successive winter wheat (WW) rotations are associated with yield reduction, often attributed to the unfavorable soil microbes that persist in through plant residues. How rotational positions of WW affect allocation freshly assimilated carbon (C), an energy source for microbes, above and belowground remains largely unknown. Methods A 13 CO 2 pulse labeling rhizotron experiment was conducted greenhouse study fixed C patterns. grown after oilseed rape (W1), one season (W2), three successive seasons (W4). We used automatic manifold system measure excess respiration at six depths five different dates. Excess also measured dissolved organic (DOC), microbial biomass pools. Results There a strong decline accompanied by distinct changes root growth. Higher W1 compared W4, especially topsoil during later growth stages. DOC traced W4 W2. Less taken up rotations. Conclusions Our demonstrates mechanism which position affects belowground. sustains longer time than successively incorporates more this its biomass.

Язык: Английский

Процитировано

2