The effects of climatical parameters on anatomical structure of Artemisia sieberi Besser populations

In this research، anatomical structure of leaf in Artemisia sieberi Besser was studied. Specimens of leaves were harvested from 34 stands in the spring. Also، seeds of plants collected and were planted in the farm. Leaves of farm plants harvested after complete growth. All specimens were studied from anatomic viewpoint in the laboratory. For comparison between nature stands and farm stands، normal curves were drawn by Minitab software. Anatomical characters of natural and cultivated plants were compared by T-student analysis. Averages of anatomical characters were analyzed by PCA in according to semi-arid، arid and hyper-arid zones. Also، averages of climatic parameters in the zones were analyzed by PCA. Some of anatomical characters increased in farm، because of adequate moisture. Thickness of cuticle decreased in farm accessions. Length of stomata increased but density of them decreased in farm. Climatical groups completely coincided with anatomical groups. Comparison of anatomical characters in nature and farm showed the effect of climatic parameters on anatomical features.