during the years 2007 and 2008, samples of winter jasmine (jasminum nudiflorum) with symptoms of galls on shoots were collected from shiraz, fars province, iran. gram and oxidase negative, aerobic bacterium that produced fluorescent pigment on kingۥs b medium was isolated from galls of infected trees. all isolates produced a hypersensitive reaction in tobacco. they were negative in arginine dih...

abstract bacterial blight of rice, causes by xanthomonas oryzae pv. oryzae , is one of the most devastating disease of rice after blast disease. during the spring and summer of 2005-2006 different paddy fields in guilan province (roodsar, langrud, lahijan, rasht, anzali, fooman, soomeesara and roodbar) were surveyed and samples were collected from rices showing blight and yellowing in leaves. t...

selection of superior chance seedling genotypes is an important task in pear breeding programs. this research was carried out in order to explore and evaluate some of european pear (pyrus communis l.) chance seedling genotypes that are primarily used as rootstock for the asian pear (pyrus serotina rehd.) in tarbiat modares university (tmu) asian pear collection orchard. after four years visual ...

The paper examines the precopulatory behaviour and copulation in Segmentina oelandica. The morphological traits associated with this process are discussed. The anatomy of the copulatory apparatus is studied using histological and histochemical (phalloidin fluorescence) methods. The copulation is shown to be a complex process determined by a specific set of morphological, physiological, behaviou...

Styrax japonicus is a small ornamental tree with medicinal values, although its flowering period short. To date, information about the morphological and physiological characteristics of petals during limited. In this study, we observed structure at full stage scanning electron microscope detected contents nutrients, minerals, endogenous hormones activities enzymes different stages. The results ...