Artículo

Microbiome homeostasis on rice leaves is regulated by a precursor molecule of lignin biosynthesis

Resumen

In terrestrial ecosystems, plant leaves provide the largest biological habitat for highly diverse microbial communities, known as the phyllosphere microbiota. However, the underlying mechanisms of host-driven assembly of these ubiquitous communities remain largely elusive. Here, we conduct a large-scale and in-depth assessment of the rice phyllosphere microbiome aimed at identifying specific host-microbe links. A genome-wide association study reveals a strong association between the plant genotype and members of four bacterial orders, Pseudomonadales, Burkholderiales, Enterobacterales and Xanthomonadales. Some of the associations are specific to a distinct host genomic locus, pathway or even gene. The compound 4-hydroxycinnamic acid (4-HCA) is identified as the main driver for enrichment of bacteria belonging to Pseudomonadales. 4-HCA can be synthesized by the host plant’s OsPAL02 from the phenylpropanoid biosynthesis pathway. A knockout mutant of OsPAL02 results in reduced Pseudomonadales abundance, dysbiosis of the phyllosphere microbiota and consequently higher susceptibility of rice plants to disease. Our study provides a direct link between a specific plant metabolite and rice phyllosphere homeostasis opening possibilities for new breeding strategies.
https://doi.org/10.1038/s41467-023-44335-3
Microbiome homeostasis on rice leaves is regulated by a precursor molecule of lignin biosynthesis
2024
gold
https://www.nature.com/articles/s41467-023-44335-3.pdf
Pin Su; Houxiang Kang; Qianze Peng; Wisnu Adi Wicaksono; Gabriele Berg; Zhuoxin Liu; Jiejia Ma; Deyong Zhang; Tomislav Cernava; Yong Liu
State Key Laboratory of Hybrid Rice and Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha, 410125, China; College of Tropical Crops, Hainan University, Haikou, 570228, China; Institute of Environmental Biotechnology, Graz University of Technology, Graz, 8010, Austria; Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Potsdam, 14469, Germany
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