Weather extremes disrupt plant defenses in surprising new ways
Xiong C, Ge AH, Gao M, Singh BK
Climate Adaptation
The wilting tomato plant after a heatwave or the sudden blight in your garden bed after weeks of drought may be a preview of how extreme weather is quietly rewiring the microbial armies that normally keep plant diseases in check.
Plants aren't just fighting disease on their own, they rely on armies of helpful microbes in the soil and on their leaves to fend off pathogens. This review pulls together evidence that sudden weather extremes, like heatwaves and flash droughts, hit this protective system differently than slow, steady warming does: they can make pathogens more aggressive, dial down a plant's immune response, and throw off the balance of good microbes that normally keep infections in check. The researchers argue that understanding and supporting these microbial communities could be a key strategy for keeping crops and wild plants healthier as extreme weather becomes more common.
Key Findings
Climate extremes (heatwaves, prolonged droughts) can increase pathogen virulence and expand their geographic range differently than gradual climate change does
Extreme weather events can suppress certain plant immune responses, leaving plants more vulnerable to infection
Climate extremes can weaken core protective functions of plant microbiomes, disrupting the balance of the classic 'disease triangle' of host, pathogen, and environment
chevron_right Technical Summary
Sudden weather extremes like heatwaves and droughts, not just gradual warming, may make plant diseases worse by weakening plants' natural defenses and disrupting the helpful microbes that normally protect them.
Abstract Preview
Original paper
Impacts of climate extremes on plant pathogens, microbiomes and plant health.
Plant diseases pose a great risk to global food security, and recent research indicates that pathogen pressures on plant productivity will substantially increase under ongoing climate change (that ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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