In this investigation, the effect of zinc excess andits interaction with ascorbic acid on some growth parameters (root and shoot, fresh and dry weight, leaf blade area and length of root and stem), proline content, soluble sugars and starch plant were studied on canola. Experimental plants were treated with different concentrations of zinc sulfate ie. 0.7 (control), 50, 100, 250, 500 and 700 mM...

Cotton plant development is usually predicted through a function of thermal time either at a daily step (Hanan and Hearn, 2003) or at a growth cycle (de Reffye et al., 1999). The GREENLAB model fits well to the architecture of some simple structured plants, e.g. pruned cotton (de Reffye et al., 1999) and maize (Guo et al., 2006). In the model, it is assumed a constant developmental rate and als...

Elatostema pleiophlebium and Elatostema malipoense, two endemic species from southeast Yunnan of China, are described and illustrated. Their diagnostic characters, description and relationship with morphologically similar species are also given. Elatostema pleiophlebium is easily recognised by its glabrous stem and leaf blade, and its longitudinally 1-ribbed outer staminate bracts. Elatostema m...