Study of some Cytomorphological Characteristics of Echinops Mann Productive Species in Fars Province

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Research Center for Natural Resources and Animal Hasbandry of Fars, Shiraz, Iran

Abstract

Manns with sweet taste are products which leach out from tree's leaf, bark and limb both naturally or through insect’s activity. This product may also secret from the trunk of some trees, when they are wounded.
In some of the species in Echinops genus Echinops mann is obtained through the activity of an insect (Larinus vulpes Olivier). Investigations carried out during 1997-1999showed that in spite of Larinus activities on all species of Echinops, mann is only produced on 4 species of Echinops endotrichus, E. dichrous, E. tenuisectus and E. persepolitanus. Morphological investigations indicated that mann productive species have spherical aggregated flowers, and all have almost similar plant height. Moreover growing zone studies showed that mann productive species grow in the same altitude range. Based on cytological studies, all Echinops species are diploid. The mentioned four productive species are also diploid with 2n=28.

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