بررسي مقايسه اي ساختار هاگدان در پنج گونه از خزه هاي شمال ايران

The comparative study of reproductive structures in five mosses of northern Iran

In the present research, the structure of sporophytes in following five species of mosses of northern Iran (Table 1) were studied: Atrichum crispum (Polytrichaceae),Orthotrichum rupestre (Orthotrichaceae), Schistidium martimum (Grimmiaceae),Tortula norvegica (Pottiaceae) and Funaria hygrometrica (Funariaceae).In the sporophyte structure, the type and shape of capsule, operculum, the lenght of seta, peristome form and the shape and size of spores were evaluated and compared with each other. Therefore, all the five species determinated and grouped in five families. Also correlation between the peristome and spore forms recognized. In some species, peristomes are made up of one and in others two rows . Peristome teeth in certain species are papillose and are not branched, while in other.are branched and cilliated and not papillose.Spores in some species have smooth surface, some carying chloroplasts, while in other have either small or large papillae. When comparing spore surface and the shape of peristome teeth in various species there seems to be a mechanical compatibility between papillose and cillia for distribution of more spores of sporangium.