Lab-grown strawberries lose gut bacteria, but scientists can add it back
Sepúlveda AMG, da Conceição Jesus E, Molina YC, Buttrós VH, Carvalho LQ
Propagation
If you've ever bought a store strawberry transplant that struggled to take root, this research explains why: tissue-culture propagation strips away the microbial partners plants need, and it also shows a fix nurseries could use to send you sturdier starts.
Strawberry plants grown in labs from tiny tissue samples come out looking identical and disease-free, but each round of lab cloning quietly wipes out the helpful bacteria and fungi living inside the plant. Scientists found that reintroducing specific beneficial soil bacteria to these lab-grown strawberries made them grow bigger, survive better once planted in soil, and even produce more of the healthy compounds like flavonoids. It's essentially giving cloned plants back a microbial gut that got lost in the lab process.
Key Findings
Bacterial diversity dropped significantly (P<0.001) with each successive in vitro subculture generation compared to the mother plant
Inoculating strawberry plantlets with Azospirillum brasilense strains Ab-V5 and Ab-V6 increased dry biomass from 190.63 mg (control) to 216.75 mg and 209.11 mg respectively
Bacteria-treated plants achieved 100% survival after transplanting to soil, versus 75% survival in untreated control plants
chevron_right Technical Summary
Repeatedly cloning strawberry plants in lab dishes strips away most of their beneficial internal microbes, but adding back specific helpful bacteria can restore plant growth, survival, and flavor compounds when the plants are moved to soil.
Abstract Preview
Original paper
Strawberry micropropagation simplifies endomicrobiome and highlights potential for in vitro biotization with beneficial rhizobacteria.
Strawberry micropropagation produces uniform, disease-free planting material. However, repeated in vitro subculturing can simplify the endophytic microbiome, reducing plant vigour and acclimatizati...
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