Dong Dexian, Xu Yuquan
Laboratory of Molecular Microbiology, College of Life Science and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
Plant Physiol Biochem. 2006 Feb-Mar;44(2-3):158-60. doi: 10.1016/j.plaphy.2006.03.001. Epub 2006 Mar 27.
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.
植物可能使用一种共同的防御系统来应对各种非生物和生物胁迫。一些假说表明，存在一种源自胁迫部位并转移到植物远处的系统信号。我们检测到，在切割烟草茎后，叶片上立即出现持续3分钟的氧化爆发，以及在水淹本氏烟草根部后，叶片上立即出现持续20分钟的氧化爆发。这两种氧化爆发均在30秒内产生。这有力地表明，系统信号不是来自胁迫部位的可运输分子，可能是某种形式的电信号。
