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image of Israel Journal of Plant Sciences

The breeding mechanism of Arisarum vulgare was studied both in the field and at the Botanical Garden of Tel Aviv University. Despite a general resemblance to Arum (both are pit-fall flowers), Arisarum differs in many important respects, which contribute to an entirely different type of breeding mechanism. The trap formed by the inflorescence chamber is not a compulsory one, and the temporarily captured insects escape very rapidly (in less than 60 minutes), as soon as they find the way out. Arisarum is self-incompatible, and the pollen germination may take place with the aid of insects which are devoid of pollen. They cause mechanical abrogation of self-incompatibility, without introducing foreign pollen into the chamber of the inflorescence. Considering the adverse climatic conditions during the winter—flowering and the slim prospects for crossing in its vegetatively propagated populations, such insect induced self—fertilization is an effective substitute for ordinary selfing which does not occur in Arisarum.

Affiliations: 1: Department of Botany, The George S. Wise Faculty of Life Sciences, Tel Aviv University


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