Physiologische Voraussetzungen für die Bildung der Kupfermangelsymptome

Physiological conditions for the development of copper deficiency symptoms So as to be able to follow the appearance of copper deficiency symptoms, investigations were initiated to study the time of lignification, transpiration, guard cell mechanism and the growth of epidermis cells. Summarising, it was ascertained that: 1) The cause of all typical copper deficiency symptoms, rolling up of the leaves, followed by wilting and death, lies in retarded lignification and incomplete formation of the vascular structure. 2) Damaged guard cells must be seen as a late occurring subsequent symptom. This damage appears after the onset of the visible symptoms and still longer after the delay in lignification. 3) No relation could be found between the wilting symptoms and the development of epidermis cells.