Following his return to Brussels, he founded the Laboratoire d'Anatomie et de Physiologie Végétales.[2] This laboratory eventually featured facilities for microscopy and chemistry, a greenhouse, a photography studio, a sterilization chamber, a thermostatic chamber and a darkroom for spectroscopy and polarimetry.[1]
Errera took a keen interest in plant defences against insect herbivores.[3] He is credited with discovering the presence of glycogen in plants and fungi (amylopectin) through the use of sophisticated histochemical techniques. He later employed these techniques to detect alkaloids in plants.[2]
In 1886, he published an important observation linking cell division in plants to the behavior of soap bubbles, which came to be known as Errera's Rule: “the cell plate, at the time of its formation, adopts the geometry that a soap film would take under the same conditions."[4]
In 1887 he became a corresponding member of the Academie Royale des Sciences de Belgique, and in 1898 was elected a full member.[5] He died in 1905 at the age of 46 from a cerebral embolism.
Selected works
In 1893 he published "Les Juifs russes : extermination ou émancipation?" (with a prefatory letter by Theodor Mommsen), a book that was later translated and published in English as "The Russian Jews; extermination or emancipation?" Among his principal scientific works are the following:
Errera L. A., Clautriau G., Maistriaux M. 1887. Premières recherches sur la localisation et la signification des alcaloides dans les plantes. H. Lamertin, Bruxelles. - on alkaloids.
Recueil d'oeuvres de Léo Errera, 1908 – Collected works of Léo Errera.[5]
References
Salomon Wininger: Große jüdische National-Biographie mit mehr als 8000 Lebensbeschreibungen namhafter jüdischer Männer und Frauen aller Zeiten und Länder. Ein Nachschlagewerk für das jüdische Volk und dessen Freunde. Bd. 2, Cernăuți 1926/1927.
Encyclopaedia Judaica. Das Judentum in Geschichte und Gegenwart., Bd. 6, Eschkol, Berlin 1930.
The universal Jewish encyclopedia in ten volumes. Bd. 4, New York 1948.
Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique: Annuaire. Bd. 68, Brüssel 1908.