Inverse correlation between jasmonic acid and salicylic acid during early wound response in rice.
This study presents a kinetic analysis of the response to wounding in rice plants. In particular, jasmonic acid, salicylic acid, and lipoxygenase activity were measured in leaves of wounded rice plants during the early tillering phase. The results show that endogenous jasmonic acid transiently increases to a maximum 30 min after wounding (jasmonic acid burst) and lipoxygenase activity increases after the jasmonic acid burst, but not after the second smaller peak of endogenous jasmonic acid 23 h after wounding. In contrast, endogenous salicylic acid decreases during the jasmonic acid burst, such that the kinetic profiles of jasmonic acid and salicylic acid are inversely correlated during the early response to wounding. It is proposed here that the increase in endogenous jasmonic acid and the decrease in endogenous salicylic acid may contribute for establishing the efficient negative cross-talk between jasmonic acid and salicylic acid signaling pathways during the early response to wounding in rice.
Lee
Ayoung
A
Department of Applied Biotechnology, Agricultural Plant Stress Research Center, Biotechnology Research Institute, Chonnam National University, Kwangju 500-757, Republic of Korea.
Cho
Kyoungwon
K
Jang
Sungkuk
S
Rakwal
Randeep
R
Iwahashi
Hitoshi
H
Agrawal
Ganesh Kumar
GK
Shim
Jaehan
J
Han
Oksoo
O
D003517:Cyclopentanes / Q000737:chemistry / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D007700:Kinetics; D008084:Lipoxygenase / Q000378:metabolism; D012275:Oryza / Q000378:metabolism / Q000502:physiology*; D054883:Oxylipins; D018515:Plant Leaves / Q000502:physiology; D020156:Salicylic Acid / Q000378:metabolism*; D015398:Signal Transduction; D013314:Stress, Mechanical; D014297:Trimethylsilyl Compounds / Q000737:chemistry
D003517:Cyclopentanes; D054883:Oxylipins; D014297:Trimethylsilyl Compounds; C011006:jasmonic acid; D008084:Lipoxygenase; D020156:Salicylic Acid