Conduction of Excitation in Stem and Leaf of Mimosa pudica

摘要: Many species of Mimosa are distinguished by the rapidity with which they conduct excitation, as shown successive fall their leaves and closure leaflets after stimulation. Recently great progress has been made in study this conduction through experimental work carried out Dr. U. Ricca, at Genoa, mainly on M. Spegazzinii (1 2). It had discovered so long ago 1824 Dutrochet (quoted 1, p. 59) that pudica , best-known species, excitation can be conducted a zone stem from tissues outside wood have removed all round ; result, though one time doubted, since repeatedly confirmed. was also found McDougall (3) pass completely killed hot water. Thus, it already seemed probable that, least must take place wood, not phloem, maintained Haberlandt (4).