Immediate oxidative burst onto the leaves after cutting the stem or flooding the roots of Nicotiana benthamiana.
Plants may use a common defense system to respond to various abiotic and biotic stresses. Some hypotheses have suggested that there is a systemic signal that originates from the site of stress and that translocates to distant parts of the plant. We have detected an immediate oxidative burst onto the leaves after cutting the stem that lasted for 3 minutes and an immediate oxidative burst onto the leaves after flooding the roots of Nicotiana benthamiana that lasted for 20 minutes. Both of the two oxidative bursts were generated within 30 seconds. This strongly indicated that the systemic signal was not a transportable molecule from the site of stress and that it could be some form of electrical signalling.
Dong
Dexian
D
Laboratory of Molecular Microbiology, College of Life Science and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China. dexiandong@yahoo.com.cn
Xu
Yuquan
Y
D004594:Electrophysiology; D018515:Plant Leaves / Q000378:metabolism*; D018547:Plant Stems / Q000502:physiology*; D017382:Reactive Oxygen Species; D016897:Respiratory Burst / Q000502:physiology*; D015398:Signal Transduction; D014026:Nicotiana / Q000378:metabolism*; D014867:Water / Q000378:metabolism*
D017382:Reactive Oxygen Species; D014867:Water