Hello,
Do you mean why would plants stop fighting germs?
They always try to fight off infections, but some plants have a stronger immune system than others (and some infections are very strong!) So sometimes the plant will win, and sometimes the infection will win.
I research the plant immune system – some plants have special genes that make them resistant to a certain disease. I try to find out how these work. If we can figure it out, we can help our crop plants to be stronger!
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