Location: Plant Gene Expression Center
Title: Drought delays development of the sorghum root microbiome and enriches for monoderm bacteriaAuthor
XU, LING - University Of California | |
NAYLOR, DANIEL - University Of California | |
DONG, ZHAOBIN - University Of California | |
SIMMONS, TUESDAY - University Of California | |
PIERROZ, GRADY - University Of California | |
HIXSON, KIM - Pacific Northwest National Laboratory | |
YOUNG, MA KIM - Pacific Northwest National Laboratory | |
ZINK, ERIKA - Pacific Northwest National Laboratory | |
ENGBRECHT, KRISTIN - Pacific Northwest National Laboratory | |
WANG, YI - University Of California | |
GAO, CHENG - University Of California | |
DEGRAFF, STEPAHNIE - University Of California | |
MADERA, MARY - University Of California | |
SIEVERT, JULIE - Kearney Agricultural Center | |
HOLLINGSWORTH, JOY - Kearney Agricultural Center | |
BIRDSEYE, DEVON - Joint Bioenergy Institute (JBEI) | |
SCHELLER, HENRIK - Joint Bioenergy Institute (JBEI) | |
HUTMACHER, ROBERT - University Of California | |
DAHLBERG, JEFFEREY - Kearney Agricultural Center | |
JANSSON, CHRISTER - Pacific Northwest National Laboratory | |
TAYLOR, JOHN - University Of California | |
LEMAUX, PEGGY - University Of California | |
Coleman-Derr, Devin |
Submitted to: Proceedings of the National Academy of Sciences (PNAS)
Publication Type: Peer Reviewed Journal Publication Acceptance Date: 6/7/2017 Publication Date: 4/16/2018 Citation: Xu, L., Naylor, D., Dong, Z., Simmons, T., Pierroz, G., Hixson, K., Young, M., Zink, E.M., Engbrecht, K., Wang, Y., Gao, C., Degraff, S., Madera, M., Sievert, J.A., Hollingsworth, J., Birdseye, D., Scheller, H., Hutmacher, R., Dahlberg, J., Jansson, C., Taylor, J., Lemaux, P., Coleman-Derr, D.A. 2018. Drought delays development of the sorghum root microbiome and enriches for monoderm bacteria. Proceedings of the National Academy of Sciences. 115(18):E4284-E4293. Interpretive Summary: Drought stress is a major obstacle to crop productivity, and the severity and frequency of drought are expected to increase in the coming century. Certain root-associated bacteria have been shown to mitigate the negative effects of drought stress on plant growth, and manipulation of the crop microbiome is an emerging strategy for overcoming drought stress in agricultural systems, yet the effect of drought on the development of the root microbiome is poorly understood. Here we demonstrate that drought delays the development of the root microbiome and enriches for a particular type of bacterial endophyte, which has potential implications for crop fitness Technical Abstract: Through 16S rRNA amplicon and metatranscriptome sequencing, as well as root metabolomics, we demonstrate that drought delays the development of the early sorghum root microbiome and causes increased abundance and activity of monoderm bacteria, which lack an outer cell membrane and contain thick cell walls. Our data suggest that altered plant metabolism and increased activity of bacterial ATP-binding cassette (ABC) transporter genes are correlated with these shifts in community composition. Finally, inoculation experiments with monoderm isolates indicate that increased colonization of the root during drought can positively impact plant growth. Collectively, these results demonstrate the role that drought plays in restructuring the root microbiome and highlight the importance of temporal sampling when studying plant-associated microbiomes. |