SLATE - Fortunately, researchers in academia and industry are searching for a more permanent fix. A few years ago, Hailing Jin, a plant molecular geneticist at University of California, Riverside, isolated a peptide from the citrus greening–tolerant finger lime tree that confers tolerance in other citrus trees. The peptide can be injected directly into the phloem of healthy trees. The tree will then mount a defense and create an immunological memory, similar to the action of a human vaccine.