Papain protects papaya trees from herbivorous insects: role of cysteine proteases in latex.

@article{Konno2004PapainPP,
  title={Papain protects papaya trees from herbivorous insects: role of cysteine proteases in latex.},
  author={Kotaro Konno and Chikara Hirayama and Masatoshi Nakamura and Ken Tateishi and Yasumori Tamura and Makoto Hattori and Katsuyuki Kohno},
  journal={The Plant journal : for cell and molecular biology},
  year={2004},
  volume={37 3},
  pages={370-8}
}
Many plants contain latex that exudes when leaves are damaged, and a number of proteins and enzymes have been found in it. The roles of those latex proteins and enzymes are as yet poorly understood. We found that papain, a cysteine protease in latex of the Papaya tree (Carica papaya, Caricaceae), is a crucial factor in the defense of the papaya tree against lepidopteran larvae such as oligophagous Samia ricini (Saturniidae) and two notorious polyphagous pests, Mamestra brassicae (Noctuidae) and… CONTINUE READING