Isoenzyme analysis of five endemic and one widespread Kniphofia species (Asphodelaceae) of Ethiopia

There are seven species of genus Kniphofia in Ethiopian flora. K. foliosa, K. hildebrandtii, K. insignis, K. isoetifolia, and K. schimperiare endemic. Kniphofia pumila and K. thomsonii are widespread from West Africa to Eastern and Central Africa. In this study the genetic diversity and the relationships between five endemic and one widespread Kniphofia species in Ethiopia was conducted based on isoenzymes systems. The electrophoretic analyses of four enzymes systems in the species from ten experimental sites in ten locations revealed seven putative loci, of which PGM-1, PGM-2, AAT-2 and GPI-2 were polymorphic. The species have displayed higher genetic diversity parameters than other endemic plants. The over all mean inbreeding coefficient (F) was positive indicating slight deficiency in the number of heterozygotes. The total genetic diversity varies from 0.5 in K. schimperito 1.11 in K. isoetifolia indicating very low diversification between the populations with in a species. At the generic level HT ranges from 0.034 to 0.470 with a mean of 0.247. The genetic variation among the species (GST) is 6.6%. Over all mean of genetic distance (0.011) and genetic similarity (0.938) indicated high similarity among the populations. Despite morphological variation particularly in floral morphology and inflorescence architecture, the over all mean of unbiased genetic identity of the species (0.989) is much higher than described for congeneric species (I = 0.64). The results, therefore, indicate that the Ethiopian Kniphofia species share a fairly recent common ancestor, but have differentiated in floral and inflorescence character through rapid evolution. This hypothesis needs, however, further testing.Key words/phrases: Endemism, genetic diversity, isoenzyme, kniphofia, inbreeding coefficient SINET: Ethiopian Journal of Science Vol. 27 (2) 2004:143–15

The uses of Kenyan aloes: an analysis of implications for names, distribution and conservation

Background The genus Aloe is renowned for its medicinal and cosmetic properties and long history of use. Sixty-three Aloe species occur in Kenya, of which around 50 % are endemic. Several species of aloes are threatened with extinction and knowledge about their use is of major importance for sound conservation strategies. The main aims of this study were to assess the biocultural value of Aloe in Kenya by documenting local uses of aloes and evaluating how the vernacular names reflect the relative importance in different ethnic groups. Methods Ethnobotanical and ethnotaxonomical data were collected using field observations and semi-structured interviews. Information was collected by interviewing 63 respondents from nine different ethnic groups, representing different ages, gender and occupations. Statistical analyses were performed using R version 3.1.2. Results A total of 19 species of Aloe were found in the study area, of which 16 were used. On the generic level Aloe was easily distinguished. At species level, the local and scientific delimitation were almost identical for frequently used taxa. Aloe secundiflora, with 57 unique use records was the most important species. The two most frequently mentioned Aloe treatments, were malaria and poultry diseases. In our study area neither age nor gender had a significant influence on the level of knowledge of Aloe use. Finally, no correlation was found between extent of use and people’s perception of decrease in local aloe populations. The aloes are highly appreciated and are therefore propagated and transported over large areas when people relocate. Conclusion Biocultural value is reflected in the ethnotaxonomy of Aloe in Kenya. Different ethnic groups recognise their most-valued Aloe at the genus level as “the aloe” and add explanatory names for the other species, such as the “spotted aloe” and the “one-legged aloe”. Widespread species of Aloe have the highest number of uses. There is no obvious correlation with high use and decrease in abundance of aloes locally, and we found no compelling evidence for local uses causing devastating damage to populations of the 19 species in use, whereas habitat loss and commercial harvesting appear to be of urgent concern for these important plants

Environmental risk and the precautionary principle. “Late lessons from early warnings” applied to genetically modified plants

Abstract: The environmental risk associated with genetically modified organisms (GMO) implies that new approaches to risk assessment, risk management and risk communication are needed. In this paper we discuss the role of the precautionary principle in policy responses to GMO risk. We first discuss application of the criteria in the European Environment Agency report “Late lessons from early warnings: The precautionary principle 1896-2000” to environmental GMO risk, with focus on crop plants. Moreover, we discuss Bayesian analysis in the context of improving the informational basis for decision making under uncertainty. Finally, environmental uncertainties are intertwined with economic uncertainties. Providing incentives for improved risk assessment, risk management and risk communication is crucial for enhancing social and environmental responsibility and thereby facilitate implementation of precautionary approaches. We discuss ethical screening of companies as an example of how such incentives can be provided

Environmental risk and the precautionary principle. “Late lessons from early warnings” applied to genetically modified plants

Abstract: The environmental risk associated with genetically modified organisms (GMO) implies that new approaches to risk assessment, risk management and risk communication are needed. In this paper we discuss the role of the precautionary principle in policy responses to GMO risk. We first discuss application of the criteria in the European Environment Agency report “Late lessons from early warnings: The precautionary principle 1896-2000” to environmental GMO risk, with focus on crop plants. Moreover, we discuss Bayesian analysis in the context of improving the informational basis for decision making under uncertainty. Finally, environmental uncertainties are intertwined with economic uncertainties. Providing incentives for improved risk assessment, risk management and risk communication is crucial for enhancing social and environmental responsibility and thereby facilitate implementation of precautionary approaches. We discuss ethical screening of companies as an example of how such incentives can be provided

Training in the North of Researchers from the South: Experiences from Nordic-African collaboration

Norwegian universities have trained students and other scholars from the South within fields related to African plant diversity through the last decades. The activities were funded by NUFU, the Norwegian Council of Universities Committee for Development Research and Education, and 30 students successfully obtained PhD degrees in taxonomy and other biodiversity related fields, and all but a few have entered into scientific position at universities or other relevant research institutes in Africa. Most collaboration involved Zimbabwe, Malawi, Ethiopia, and Kenya, and though successful, they all faced the challenges of multi-institutional and multi-cultural teaching and research collaboration. Basic research within botanical diversity is better taken care of when the university councils own and administer the projects, compared to the alternative ownership by aid agencies

Environmental risk and the precautionary principle. “Late lessons from early warnings” applied to genetically modified plants

The environmental risk associated with genetically modified organisms (GMO) implies that new approaches to risk assessment, risk management and risk communication are needed. In this paper we discuss the role of the precautionary principle in policy responses to GMO risk. We first discuss application of the criteria in the European Environment Agency report “Late lessons from early warnings: The precautionary principle 1896-2000” to environmental GMO risk, with focus on crop plants. Moreover, we discuss Bayesian analysis in the context of improving the informational basis for decision making under uncertainty. Finally, environmental uncertainties are intertwined with economic uncertainties. Providing incentives for improved risk assessment, risk management and risk communication is crucial for enhancing social and environmental responsibility and thereby facilitate implementation of precautionary approaches. We discuss ethical screening of companies as an example of how such incentives can be provided.Environmental risk; precautionary principle; Bayesian analysis; genetically modified organisms.

Ethnobotanical Study of Hyacinthaceae and Non-hyacinthaceous Geophytes in Selected Districts of Malawi

researchThis paper reports on the findings of an ethnobotanical survey of geophytes used in 15 selected districts of Malawi. The survey was initially driven by the need to assess the conservation status and use of Lilioid monocots of the family Hyacinthaceae. Altogether, 49 geophytes were documented as useful for food (24%), medicine (58%) and other purposes (18%). The most commonly reported species was Dioscorea odoratissima Pax. (Dioscoreaceae). Monocots represented 45% of the total. Members of the family Hyacinthaceae were only represented by 3 (6%) species Albuca abyssinica Jacq., Ledebouria cordifolia (Baker) Stedje & Thulin and Ledebouria revoluta (L.f.) Jessop. The study has further explored six alternative methods of evaluating sampling effort and estimating species richness. Michaelis-Menten Means estimator appeared to be the best estimator of species richness but was not able to accurately predict species richness for all the data combined. A bootstrap estimator was found to be more accurate. It was also apparent from the survey of geophytes that species in the Asteraceae and Fabaceae are more sought after for food and medicine than hyacinthoide monocots evidenced by fewer representatives mentioned by respondents