Advances in Understanding Phytoplasma Interactions with Plants and Insects.
Pedroncelli A, Singh Y, Hogenhout SA, Janik K
Plant Signaling
Stone fruit trees, grapevines, and vegetable crops across the world are quietly being devastated by diseases spread by leafhoppers — and the bacteria behind them are sophisticated enough to reprogram both the plant and the bug carrying them.
Phytoplasmas are microscopic parasites that live inside plant cells and cannot survive on their own outside a host. They are spread by sap-sucking insects like leafhoppers and, once inside a plant, they release proteins that scramble the plant's normal growth signals — causing bizarre symptoms like leaf yellowing, stunted growth, and flowers turning back into leafy shoots. Researchers are now figuring out exactly which proteins cause which damage, opening the door to targeted ways of stopping these diseases before they wipe out harvests.
Key Findings
Phytoplasma effector proteins directly target plant transcription factors and proteasome components, effectively hijacking the plant's own gene-regulation and protein-degradation systems to benefit the pathogen.
Phytoplasmas actively manipulate insect vector behavior — not just infecting them passively — creating a three-way interaction between pathogen, plant, and insect that makes disease spread harder to interrupt.
Emerging biocontrol strategies, including manipulation of insect vector microbiomes, are being explored as sustainable alternatives to chemical control amid growing concerns about climate-driven range expansion of phytoplasma diseases.
chevron_right Technical Summary
Scientists are uncovering how phytoplasmas — tiny bacteria that live inside plant cells — hijack plant growth, weaken plant defenses, and even manipulate the insects that spread them. This review maps out what we know and points toward new biological tools to protect crops from these pathogens.
Abstract Preview
Phytoplasmas are obligate intracellular plant pathogens causing devastating plant diseases worldwide. This review summarizes recent advances uncovering the molecular mechanisms by which phytoplasma...
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