This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Web of Science (12) Citing Articles via Google Scholar Google Scholar Articles by Sperk, G. Articles by Tuppy, H. Search for Related Content PubMed PubMed Citation Articles by Sperk, G. Articles by Tuppy, H. Agricola Articles by Sperk, G. Articles by Tuppy, H.

Articles

Differences between Adenosine Triphosphatases from Monocotylous and Dicotylous Plants ¹

^a Institut für Biochemie der Universität Wien, Austria

The mitochondrial membrane-bound ATPases of several plants were investigated. Two distinct types were encountered. The mitochondrial ATPases of castor bean (Ricinus communis var. Zanzibarensis, L.), cauliflower (Brassica oleracea, L.), and scarlet runner (Phaseolus coccineus, L.) were found to be inhibited by oligomycin, to have elevated molecular weights when separated from the organelles by ultrasonication and ammonium sulfate treatment and, subsequent to purification, to be cold-labile. On the other hand, mitochondria isolated from wheat (Triticum aestivum, L.), maize (Zea mays, L.), calla (Zantedeschia aethiopica, Spreng.), and onions (Allium cepa, L.) contain ATPases which, after ultrasonication of the organelles, were virtually insensitive to oligomycin and those molecular weights were as low as about 45,000; in the purified form they were resistant to storage in the cold. The plants whose mitochondria were of the first type, characterized by having ATPases similar to those of the mitochondria of animal tissues and bakers' yeast, belonged to the dicotyledons, whereas the mitochondria of the other type were found in monocotyledonous plants.