The phenomena of catalysis and of Diastatic fermentation have for the first time been brought under the general laws of energetics.
"The Mechanism of Life"
Stéphane Leduc
Neither time nor space will permit me to go into the enormous field of research and results opened up by these and similar observations made between 1860-70. It must suffice to say that they led to the discovery and study of the Diastatic and other enzymes in the leaves and other green parts of plants, and to a clearer understanding of what was already known of them in seeds, and this knowledge reacted at once on our insight into the processes of transport of reserve materials and constructive materials from one part of the plant to another, matters which will be referred to later on.
"Disease in Plants"
H. Marshall Ward