Identification of anti-fungal bioactive terpenoids from the bioenergy crop switchgrass (<i>Panicum virgatum</i>)

Li, Xingxing; Chou, Ming-Yi; Bonito, Gregory; Last, Robert L.

doi:10.1101/2023.02.24.529965

Cited by 1 publication

(2 citation statements)

References 79 publications

(107 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Saponins are a group of specialized plant metabolites that can exhibit biological activities such as antibacterial, antifungal, and cytotoxic properties [9,62]. Saponins are secreted from plant roots into the rhizosphere and can alter soil bacterial communities [63].…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, different plant genotypes can have distinct metabolite compositions (e.g. [8]), with potential consequences for microbiome recruitment (e.g., [9]). In the bioenergy feedstock switchgrass (Panicum virgatum), there were different metabolite profiles for upland and lowland ecotypes [8], with in-vitro studies showing that differential metabolite accumulation across ecotypes can contribute to different microbiome compositions [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Disentangling plant- and environment-mediated drivers of active rhizosphere bacterial community dynamics during short-term drought

Bandopadhyay

Bowsher

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

Background. Mitigating the effects of climate stress on crops is important for global food security. The microbiome associated with plant roots, henceforth, the rhizobiome, can harbor beneficial microbes that alleviate stress impacts. However, the factors influencing the recruitment of the rhizobiome during stress are unclear. We conducted an experiment to understand bacterial rhizobiome responses to short-term drought for two crop species: switchgrass and common bean. We used 16S rRNA and 16S rRNA gene sequencing to investigate the impact of drought severity on the recruitment of active bacterial rhizobiome members. We included planted and unplanted conditions to distinguish the environment- versus plant-mediated drivers of the active rhizobiome. Results. Though each crop had a distinct rhizobiome, there were differences in the active microbiome structure between drought and watered and between planted and unplanted treatments. Despite their different community structures, the drought rhizobiome dynamics were similar across the two crops. However, the presence of a plant more strongly explained the rhizobiome variation in bean (17%) than in switchgrass (3%), with a small effect of plant mediation during drought only observed for the bean rhizobiome. The switchgrass rhizobiome was stable despite differences in the rhizosphere metabolite profiles between planted and unplanted treatments. Specifically, steroidal saponins and diterpennoids were enriched in drought, planted switchgrass soils. Conclusions. We conclude that rhizobiome benefits to resist short-term drought are crop-specific, with the possibility of decoupling of plant exudation and rhizobiome responses, as we observed in switchgrass. We propose bacterial taxa uniquely associated with common bean plants during the short-term drought, which could be further evaluated to determine any plant benefit during drought.

show abstract

Section: Discussionmentioning

confidence: 99%