Abstract：
:Seeds are reservoirs of beneficial and harmful microorganism that modulates plant growth and health. Here, we access seed to seedling bacteriome assembly modified by seed-disinfection and the underlined effect over maize germination performance and root-seedlings microbial colonization. Seed-disinfection was performed with sodium hypochlorite (1.25 %, 30 min), resulting in a reduction of the cultivable-dependent fraction of seed-borne bacteria population, but not significantly detected by real-time PCR, microscopy, and biochemical analysis of the roots on germinated seeds. 16S rRNA sequencing revealed that bacteriome of non-germinated seeds and roots of 5-d germinated seeds exhibited similar diversity and did not differ in the structure concerning seed-disinfection. On the other hand, the relative abundance reduction of the genera f_Enterobacteriaceae_922761 (unassigned genus), Azospirillum, and Acinetobacter in disinfected-seed prior germination seems to display changes in prominence of several new taxa in the roots of germinated seeds. Interestingly, this bacteriome community rebuilt negatively affected the germination speed and growth of maize plantlets. Additionally, bacteriome re-shape increased the maize var. DKB 177 susceptible to the seed-borne plant pathogen Penicillium sp. Such changes in the natural seed-borne composition removed the natural barrier, increasing susceptibility to pathogens, impairing disinfected seeds to germinate, and develop. We conclude that bacteria borne in seeds modulate the relative abundance of taxa colonizing emerged roots, promote germination, seedling growth, and protect the maize against fungal pathogens.
journal_name
Microbiol Resjournal_title
Microbiological researchauthors
Santos LF,Souta JF,Rocha LO,Soares CP,Santos MLC,Grativol C,Roesch LFW,Olivares FLdoi
10.1016/j.micres.2020.126643subject
Has Abstractpub_date
2021-02-01 00:00:00pages
126643eissn
0944-5013issn
1618-0623pii
S0944-5013(20)30511-5journal_volume
243pub_type
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