فهرست مطالب غلامرضا بلالی دهکردی

This paper presents a result of studies on lichens in Esfahan province during the period of early June – late September in 2011. Psora himalayana (C.Bab.) Timdalis reported as new for Iran. A short description and illustrations of anatomically important characters are presented.

In this study، in order to reduce the pathogenesis of potato virus Y in two potato (Solanum tuberosum L.) cultivars (Marfona and Agria)، the effects of salicylic acid on chlorophyll content and leaf area were investigated under greenhouse conditions. The healthy potato plantlets were propagated and transferred to pots containing suitable and sterilized soil. The plantlets were sprayed with different concentrations (0، 0. 2، 0. 5، 1 and 2 mM) of salicylic acid. The leaves were inoculated by potato virus Y، extracted from infected tobacco leaves. Although viral infection symptoms on tobacco were manifested by leaf rippling، no such symptoms were visible on infected potato leaves. Also، results showed that treatments with 0. 5 and 1. 0 mM of salicylic acid resulted in 26% reduction in potato damages. Moreover، our study revealed that Marfona cultivar was more resistant to potato virus Y than Agria cultivar.

Sargassum C. Agardh (Sagassaceae، Phaeophycaeae) is a brown algae in the Iranian southern coasts which they showed high density along the subtidal zone of area. In this study، the features of four species of Acanthocarpicae (S. crassifolium J. Agardh and S. oligocystum Montagne) and Malacocarpicae (S. baccularia (Mertens) C. Agardh، S. henslowianum C. Agardh) were described. Species within the Malacocarpicae section were typified by having smooth receptacles، whereas those in the Acanthocarpicae section had spiny receptacles. Also، presence of discoid to conical holdfast، elongated to lanceolate leavesand with wavy to denticulate margin were the main characters of these sections. S. baccularia was characterized by less sping branches compared to other species. S. crassifolium and S. oligocystum had flattened primary branches، their leaves mostly wavy or denticulate at margins، with leaf-like mucronate at vesicles apex and racemose to paniculate receptacles.