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l ‐ DOPA inhibited the root growth of lettuce by inducing reactive oxygen species generation
Author(s) -
Mushtaq Muhammad Naeem,
Sunohara Yukari,
Matsumoto Hiroshi
Publication year - 2013
Publication title -
weed biology and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 36
eISSN - 1445-6664
pISSN - 1444-6162
DOI - 10.1111/wbm.12019
Subject(s) - reactive oxygen species , biology , lipid peroxidation , antioxidant , oxidative stress , polyphenol , growth inhibition , oxygen , biochemistry , botany , cell growth , chemistry , organic chemistry
l ‐3,4‐dihydroxyphenylalanine ( l ‐ DOPA ) is a bioactive natural compound that inhibits the growth of several plant and weed species. However, its mode of action is not yet well understood in plants. The present study was conducted to explore the mechanism of growth inhibition by l ‐ DOPA in lettuce ( L actuca sativa L.). The results revealed that l ‐ DOPA induced cell death and inhibited the root growth of lettuce. Moreover, 0.1 mmol L –1 l ‐ DOPA enhanced the polyphenol oxidase activity, production of reactive oxygen species ( O 2 −and H 2 O 2 ) and lipid peroxidation in the lettuce roots. The results suggest that l ‐ DOPA ‐induced growth inhibition in lettuce roots might be related to oxidative stress.