Malone M
Horticulture Research International, Wellesbourne, Warwicks, CV35 9EF, UK.
New Phytol. 1994 Sep;128(1):49-56. doi: 10.1111/j.1469-8137.1994.tb03985.x.
The mechanism of wound signalling in Mimosa is discussed with a brief historical survey. It is demonstrated that strong wound-induced hydraulic signals occur in Mimosa pudica L., as in many other plants, and that the basipetal mass flows associated with these events could disperse solutes from the wound site at rates of at least 15 mm s and possibly up to 300 mms . When such wound-induced 'hydraulic dispersal' is taken into account, Ricca's theory of chemical signalling can explain long-distance transmission in Mimosa. The pattern of long-distance wound signalling in Mimosa is shown to be consistent with such a model. Implications for theories of electrical signalling in Mimosa are discussed and it is concluded, in agreement with some previous workers, that systemic wound-induced electrical phenomena in Mimosa are not travelling signals, but are local responses to the travelling chemical messengers.
通过简要的历史回顾，探讨了含羞草伤口信号传导的机制。结果表明，与许多其他植物一样，含羞草中会出现强烈的伤口诱导液压信号，并且与这些事件相关的向基质量流可以以至少15毫米/秒的速度，甚至可能高达300毫米/秒的速度从伤口部位扩散溶质。当考虑到这种伤口诱导的“液压扩散”时，里卡化学信号理论可以解释含羞草中的长距离传输。含羞草中长距离伤口信号传导的模式与这样一个模型一致。讨论了对含羞草电信号理论的影响，并与一些先前的研究者一致得出结论，即含羞草中系统性伤口诱导的电现象不是传播信号，而是对传播的化学信使的局部反应。
