This book had its beginnings about thirty-five years ago, when I migrated to Australia from Canada, and began a doctoral study concerning the role of allelopathy in forests of the eucalypt known in Australia as mountain ash (Eucalyptus regnans), under the supervision of Dr Kingsley Rowan and the late Dr David Ashton. In first assembling materials for the usual survey of the relevant literature, I came to realise that the relative youth of Australia as a nation and its geographical remoteness were to be barriers in fully dealing with historical concepts. At times, the simplest option was to buy the requisite antiquarian books, if they were not readily available from local libraries. I remember that one of the first such works that I acquired was de Candolle’s Physiologie Végétale, and it was then that I began to learn that the history of allelopathy had been only superficially investigated. Allelopathy is a topic which has been very much in the limelight of plant ecology in the past few decades. It is a controversial topic which has a surprisingly large body of literature associated with it, yet the mere existence of allelopathy as an ecological process is still considered doubtful by many. Most students of allelopathy seem to have assumed that the topic has been c- menced in 1937 with the work of Hans Molisch, or to those more historically minded, the theories of A. P.
Allelopathy is the study of the chemical interactions of plants. This concept has been known since antiquity, and first appears unambiguously in written form in about 350 B.C. in the works of Theophrastus. This book provides a detailed account of the concept of allelopathy as it has occured through the course of botanical literature from the earliest recorded writings to the modern era.
In the ancient world, the negative and positive interaction of plants was expressed within the framework of antipathy and sympathy of things. As such, antipathy and sympathy were more widely understood than generally appreciated, and indeed were assimilated in aspects of culture outside of botany and agriculture.
This book firstly addresses the question of what is allelopathy, as allelopathy is one of these unfortunate terms in ecology that has no unified definition. The book then examines the major episodes in the history of allelopathy: the writings from classical Greece and Rome; mediaeval Arabic, Indian and Chinese work; the advent of printing and promulgation of information in the 16th and 17th centuries; the 18th century and the theory of root excretion; the 19th century and the influence of A.P. de Candolle; the early 20th century and the work of Pickering and the USDA Bureau of Soils; and the years leading to the current era.
The work draws extensively on original sources, and consequently many of the assertions published in relation to the background of allelopathy, are shown to be incorrect, or at best very inadequate. There is a great deal of information presented, in a consolidated or accessible form, for the first time. The book endeavours to set the history of allelopathy within both a scientific and sociological context.
