continued on page 4 The term allelopathy was first introduced in 1937 and refers to biochemical interactions among plants that alters plant growth, including those mediated by microorganisms. Allelopathy, besides including competition for resources among plants, is considered to be an important mechanism of plant interference caused by the addition of plant-produced toxins to the plant environm...

Abstract Ninebark ( Physocarpus opulifolius ) is an attractive ornamental shrub with poor rooting characteristics in some cultivars, which a limiting factor commercial production This study was designed to optimize conditions of ninebark cuttings and observe the effect exogenous auxin IBA on morpho-anatomical biochemical changes associated rhizogenesis vitro conditions. Both auxins under study:...

The objective of this study was to investigate the effects of repeated dry season annual hot fires on woody plants in a semi-arid southern African savanna in Zimbabwe. Parts of the National University of Science and Technology (NUST) research fields in Bulawayo, Zimbabwe have been burnt annually in the dry season between 1994 and 2003 in order to control bush encroachment. The present study was...