Root hairs are formed by two separate processes: initiation and subsequent tip growth. Root hair initiation is always accompanied by a highly localized increase in xyloglucan endotransglycosylase (XET) action at the site of future bulge formation, where the trichoblast locally loosens its cell wall. This suggests an important role of XET in the first stages of root hair initiation. The tip of g...

Effective control techniques for pale swallowwort (PSW), an invasive herbaceous vine of old fields and forest understories, are limited. We conducted a 3-yr cutting and herbicide study on an adjacent old-field and forest understory site near Ithaca, NY, for control of PSW. Plants in experimental plots were cut in early July and cut again or sprayed in late August for two seasons with the isopro...

the research was carried out to study the effect of provenance variation on stem length, stem biomass, root biomass and survival ofcaucasian oak (quercus macranthera) seedlings. the seeds were collected from several seed sources grown in an altitude range of 1800-2000 m a.s.l in alborz mountain, both from the northern facing slope, kordkoy and chichal, and from the southern facing slope, roudba...

two different propagation procedures including aeroponics and soil systems were compared for the minitubers production in potato. the minitubers were evaluated for several quality characters. the plant materials were from three cultivars, agria, marfona and savalan. the plantlets were grown in aeroponics and soil production systems at a plant density of 100 plants per m-2 and stem length, root ...

To characterize some important eco-physiological aspects of  Alhagi pseudalhagi growth, the present investigation was conducted at the farm of Khorasan Agricultural Research Center during 2004-2005. Various botanical characteristics including root structure and existence of starch in root were studied. Number of seeds per pod, pod length and test weight were recorded. A number of field and pot ...

Understanding the regrowth condition and pattern for vine plant Epipremnum aureum is important effective removal of this invasive species. The purpose study was to clarify influence light environment, size body, existence roots on survival a piece body E. aureum. We surveyed cuttings different sizes under three conditions representing outside, edge, inside forests (Experiment 1), with or withou...

some crops have been observed to posses effects of allelopathic type. it would be interesting and useful as well to study these plants' allelopathic effects on other crop plants, particularly in rotation and intercropping. so, in this study, the allelopathic potential of cucumber organs' extract on seedling growth of cucumber, eggplant, pepper, and tomato was evaluated using a randomi...

Even though the Lavandula species may be propagated by seeds, it should not be the preferred propagation method because it causes a great lack of uniformity. On the other hand, asexually propagated lavender crops would provide more homogeneous crops, and clones from high quality plant material would increase the odds for obtaining a higher quality essential oil. However, problems such as poor r...

iron wood (parrotia persica) tree as a forest species has many applications in urban green landscape. however, its reproduction and seedling production have not been studied in iran. thus, knowing the type of cutting and hormone treatments to increase the rooting of cuttings can be very effective. accordingly, annual and perennial cuttings were prepared in january and june, respectively. cuttin...