Showing papers in "South African Journal of Botany in 2009"

TL;DR: Foliar applications of seaweed extract significantly enhanced yield parameters under rainfed soybean production and could be a promising option for yield enhancement.

TL;DR: Although Doge was affected from drought more than the other cultivars, it could probably withstand drought with better upregulating its protective mechanisms and be classified as less drought tolerant, but others as tolerant.

TL;DR: The isolation and identification of this compound from plant-derived smoke, its effects on plants and the current state of knowledge on possible mode of action are reviewed, as well as impacts it may have in the natural environment are reviewed.

TL;DR: All available scientific literature published on A. afra is collected to bring together most of the available scientific research conducted on this species, which is currently scattered across various publications, into this review paper.

TL;DR: UV-B with increasing doses enhanced lipid peroxidation and the activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD), however, the enhancement in SOD activity in N. muscorum (13–25%), P. boryanum (18–34%) and Aphanothece sp.

TL;DR: The study confirms the ubiquity of nectarivorous yeasts in plant communities and identifies novel ways of approaching the study of nectar characteristics and exciting new perspectives on the role of yeast in plant–pollinator relationships.

TL;DR: It is found that floral tube length has a bimodal distribution with 37 Cape species potentially dependent on pollination by Malachite Sunbirds, a pollination service irreplaceable by the more abundant, short-billed sunbird species.

TL;DR: Optimum shoot multiplication was achieved by omitting auxin and using the cytokinin meta -Topolin riboside, and Rooted plantlets produced, using the optimized protocol, were acclimatized successfully by direct transfer to the greenhouse in a 1:1 ratio of sand:soil mixture.

TL;DR: In this paper, Acetone extracts from different parts of seven common invasive plant species occurring in South Africa were studied as potential sources of antifungal agents for selected phytopathogenic fungi.

TL;DR: The Sneeuberg mountain complex (Eastern Cape) comprises one of the most prominent sections of the Great Escarpment in southern Africa but until now has remained the botanically least known regions.

TL;DR: It's coming again, the new collection that this site has; the favorite mind altering and poisonous plants of the world book is offered as the choice today.

TL;DR: In this article, the authors studied the patterns of bee diversity and endemism with a special focus on South Africa and the Cape Floral Kingdom and identified twelve distribution types that largely coincide with patterns in the seasonality of precipitation: winter rainfall, early to mid summer rainfall, late to very late summer rainfall and rain all year.

TL;DR: The population has not and likely will not rapidly spread in area, and so containment is feasible, and the categorisation of A. paradoxa as a potential landscape transformer that requires immediate control by conducting a formal risk assessment using the Australian Weed Risk Assessment system is confirmed.

TL;DR: Findings support the hypothesis that pollination syndromes can be used to make testable predictions about floral trait evolution due to pollinator selection.

TL;DR: Petroleum ether, dichloromethane, ethanol (70%) and water extracts of 12 South African plants were screened using micro-dilution assays against Gram-positive (Bacillus subtilis, Staphylococcus aureus), Gram-negative (Escherichia coli) bacteria, and the fungus Candida albicans.

TL;DR: It was concluded that the sampled marula population was not sustaining itself under the conditions prevalent between 2001 and 2008, and any projections for the likely fate of marulas in terms of adult mortality would mainly apply to this ecozone.

TL;DR: Compared the antifungal activities of extracts of the leaves, twigs and bark of C. dentata to identify possible substitution of leaf material for bark for medicinal purposes and found the leaves were five-fold more active than the bark.

TL;DR: Isoberlinia seedlings were more abundant below the canopy of mature trees than further away and the main dispersal mode of the species consisted of dropping the seeds from pods under the mother tree, and suckering which resulted in the observed aggregated distribution of the trees.

TL;DR: Dormancy and germination of dimorphic achenes have been compared within and between numerous species of Asteraceae, whereas only a few such comparisons have been made with trimorphic Achenes.

TL;DR: Two antiplasmodial compounds are isolated from Vernonia colorata using bioassay-guided fractionation with selective indices of 1.02 and 2.79 for vernolide and vernodalin respectively.

TL;DR: Alkaloids from Boophone disticha L. Herb, used in traditional medicine for treatment of painful wounds, headaches, skin disorders, inflammatory conditions, rheumatic pains and anxiety, showed activity in the functional assay, buphanidrine and distichamine being the most active with IC50-values of 513 µM and 646 ´M, respectively.

TL;DR: The overall results provide promising baseline information for the potential use of the crude extracts from DTT as well as some of the isolated compounds in the treatment of bacterial and fungal infections.

TL;DR: Control pollination experiments showed that the species is genetically self-incompatible and thus totally reliant on pollinator visits for seed set, consistent with the pollination syndrome found in plants pollinated by opportunistic avian nectarivores.

TL;DR: Of the different media types tested, half-strength Murashige and Skoog (MS) medium reduced STN significantly without affecting shoot multiplication and growth and transferring cultures to fresh medium at two-weekly intervals helped to reduce STN and enhanced growth.

TL;DR: The discovery of a large, well-pollinated population of H. epipactidea in the Eastern Cape allowed us to confirm the presence of this unusual pollen placement on a number of species of shorter-tongued hawkmoths, including Agrius convolvuli, which is likely to function as a nectar thief as the length of the tongue of this species relative to the nectar spur ensures that the forelegs are unlikely to come into contact with the viscidia.

TL;DR: Clear understanding of both flower and nectar characteristics, and observations of flower visitors, are therefore required before an accurate prediction of pollinator type can be made.

TL;DR: The results do not support the use of syndromes for predicting all of a flower's important pollinators, but they do support the idea that floral morphology will be shaped by the most effective pollinators at the time.

TL;DR: Using controlled pollination experiments, it is shown that this species has a heteromorphic incompatibility system and the fauna of long-proboscid fly and butterfly pollinators in a P. auriculata population in KwaZulu-Natal, South Africa is documented.

TL;DR: It is shown that preservation of remnant clumps of closed-canopy thicket in degraded landscapes is of paramount importance for restoration, and that for recruitment of a wide range of canopy species to occur outside of these remnant clump, it is essential to restore closed- canopy conditions as speedily as possible.

TL;DR: The hypothesis that the chemical messages emitted by figs are species-specific is supported, as the blend of VOCs emitted by receptive syconia of two closely related fig species F. sur and F. sycomorus was characterized.