Seed surface microbes shape eelgrass health for weeks after sprouting
Chaput G, Deen EA, Pham EQ, Crystal S, Matayoshi A
Restoration Ecology
Coastal restoration crews plant millions of eelgrass seeds each year to rebuild underwater meadows that shelter fish and store carbon, and this research shows the microbes riding on those seeds can make or break early survival, much like soil microbes matter for a backyard vegetable bed.
Researchers used small, controlled water chambers to grow eelgrass, an underwater flowering plant, from seed and tracked which microbes showed up as the seedlings developed. They found that even after cleaning the seed surfaces, the microbes that had been living there left a lasting mark on the plant's microbial community, and different microbes showed up at different growth stages, like a changing cast of characters as the plant matures. This gives restoration scientists a new tool to test whether adding helpful microbes to seeds could give struggling seagrass meadows a better start.
Key Findings
EcoFAB 2.0 chambers successfully grew Zostera marina seedlings in a controlled lab setting while keeping microbial diversity low and consistent
Even after surface sterilization removed seed epiphytes, microbiota composition stayed divergent at Stage 6, with 143 differentially abundant ASVs, showing seed coat microbes leave a lasting imprint
26 stage-specific indicator microbial ASVs were identified across eelgrass development, pointing to distinct microbial associations at each growth stage
chevron_right Technical Summary
Scientists grew eelgrass seedlings in mini lab ecosystems and found that microbes living on and in the seeds shape the plant's microbial community for a long time after germination, offering a way to design better microbiomes for restoring underwater seagrass meadows.
Abstract Preview
Original paper
Microbiota assembly in Zostera marina during early host development across controlled growth experiments.
Seagrass restoration practices are evolving to leverage microbiome applications, similar to agricultural systems that have demonstrated how targeted microbial communities enhance crop resilience in...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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