Jones Clive G, Hopper Robert F, Coleman James S, Krischik Vera A
Institute of Ecosystem Studies, P.O. Box AB, 12545, Millbrook, NY, USA.
Cornell University, 14853, Ithaca, NY, USA.
Oecologia. 1993 Mar;93(3):452-456. doi: 10.1007/BF00317892.
Patterns of systemically induced resistance (SIR) in Eastern Cottonwood, Populus deltoides, measured by reduced feeding of the leaf-chewing beetle, Plagiodera versicolora, were shown to be directly related to the distribution of the plant vasculature. Mechanical damage to single leaves resulted in SIR in non-adjacent, orthostichous leaves (vertically aligned on the stem) with direct vascular connections, both up and down the shoot; but no SIR in adjacent, non-orthostichous leaves with less direct vascular connections. The control that the plant vasculature exerts over signal distribution following wounding can therefore be used to predict SIR patterns, explain variation in the distribution of SIR, and relate this ecologically important phenomenon to biochemical processes of systemic gene expression and biochemical resistance mechanisms.
通过减少食叶甲虫杨叶甲的取食来测定的东部杨树木（毛果杨）中系统诱导抗性（SIR）模式，被证明与植物维管系统的分布直接相关。对单叶的机械损伤会导致在具有直接维管连接的、非相邻的、纵列叶（在茎上垂直排列）中产生系统诱导抗性，在枝条上下均如此；但在具有较少直接维管连接的相邻、非纵列叶中则不会产生系统诱导抗性。因此，植物维管系统在受伤后对信号分布所施加的控制可用于预测系统诱导抗性模式、解释系统诱导抗性分布的变化，并将这一具有重要生态意义的现象与系统基因表达的生化过程及生化抗性机制联系起来。
