Symbiont dominance and microbiome dysbiosis in wheat-aphid revealed through 16 S rRNA gene amplicon sequencing analysis.
Jasrotia P, Chandra P, Singh A, Kashyap PL, Sharma SK
Crop Improvement
The bread on your table depends on wheat, and tiny aphids quietly hijack its microbial ecosystem — understanding exactly how could lead to smarter, pesticide-reduced ways to protect the crop.
Scientists swabbed healthy wheat plants and aphid-infested wheat plants, then used DNA tools to identify all the bacteria living on them. They found that when aphids move in, a bacterium called Buchnera — which aphids depend on to survive — shows up in large numbers on the plant too, crowding out the plant's normal bacterial neighbors. This kind of microbial takeover could be a hidden factor in why aphid-attacked crops suffer so much damage.
Key Findings
Aphid bodies were overwhelmingly dominated by Buchnera bacteria (~86% of their microbiome), confirming its essential role as a nutritional partner the aphid cannot live without.
Aphid-infested wheat plants showed a detectable Buchnera presence (~7%) absent in healthy plants, indicating the aphid's symbiont spills over into the crop's own bacterial community.
Bacterial diversity on wheat dropped significantly under aphid infestation, with Shannon diversity ranging only 0.428–1.243 across samples, signaling measurable microbiome disruption.
chevron_right Technical Summary
When aphids attack wheat plants, they bring along a dominant gut bacterium called Buchnera that reshapes the wheat plant's own bacterial community — potentially making the plant more vulnerable. This study mapped those microbial shifts using DNA sequencing, revealing that aphid infestation dramatically alters which bacteria live on and in wheat.
Abstract Preview
Insect herbivory represents a major biotic stress that leads to significant losses in crop yield and quality worldwide. Aphids, in particular, damage wheat (Triticum aestivum L.), a staple crop tha...
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