Duplication of Aldolase and Esterase Loci in Cicer (Cicereae Alef.)

The genetic control of fructose bisphosphate aldolase (ALDO, EC 4.1.2.13) and esterase (EST, EC 3.1.1.2) isozymes in Cicer was studied by starch gel electrophoresis. Fixed heterozygote enzyme phenotypes were observed in homozygous lines for both Aldo-1, Aldo-2 and Est-4, Est-5. Crosses between the individuals carrying different alleles of the duplicated genes gave rise to asymmetrically staining bands for both enzyme systems. Subcellular localization studies demonstrated that the products of duplicated aldolase loci are present in the plastids, whereas duplicated esterase isozymes were found in the cytosolic compartment. Selfing and crossing experiments revealed that there are two nuclear genes encoding the plastid specific ALDO isozymes (Aldo-1 and Aldo-2). Similarly, EST-4 and EST-5 isozymes are specified by two nuclear genes (Est-4 and Est-5). No linkage was found between any of the duplicated genes and the other isozyme loci examined in this study. Taxonomic distribution of both duplications was examined in the electrophoretic survey of the related species. Present evidence suggests that these duplications are unique and probably occurred only in this monophyletic tribe, Cicereae, since no duplication was reported in the related genera. No evidence for mutations silencing any of the duplicated copies was detected in the genus. Although the mechanism for duplications is not known, evidence for translocations in Cicer and the existence of a similar linkage between ALDO and EST isozymes in related genera indicate that both duplications may have arisen simultaneously via duplication of a chromosomal segment carrying the ancestral state of the gene

Trends in support for research and development of cool season food legumes in the developing countries

In addition to their role in human nutrition, food legumes are an integral part of farming systems world wide in diversifying cropping systems and maintaining soil fertility. 1996 world production is around 57 million tonnes. The population in developing countries is expected to be 6.06 billion by 2010, and the demand for food legumes is expected to be around 110.65 million tonnes. This poses a challenge to scientists and policy makers to meet this demand. The growth trends during 1990-94 for area, production, and productivity globally were negative, with few exceptions. Many countries in Asia need to increase production by at least 50% by 2010, and double it by 2020, to meet the needs of the growing population. The current research and development (R&D) thrusts, in developing countries, are geared towards increased production, but with varied success. An increased reliance on plant breeding and extensive cultivation of legumes in marginal areas has led to over-exploitation of the limited genetic resources. Some national governments (eg Turkey and India) have programmes to increase production, but early successes have plateaued, and shifts in direction are needed. The major proportion (50-75%) of R&D funds in developing countries is allocated to staple cereals, and only a small portion of the remaining budget is available for legumes. The following strategies are suggested to strengthen support for food legume research: integrated cropping systems management (variety+agronomic practices+crop rotations) to bridge the yield gap in different agroclimatic conditions; strategic research to breach yield ceilings and develop cultivars that can produce high and stable yields in better-endowed environments and thus compete with cereals; strengthen research collaboration within and among national programmes and with the international agricultural research centres; increase the role of regional, networks and working groups to enhance technical cooperation among developing countries; increase the collaboration between public and private sectors and exploit their comparative advantages to achieve mutual goals; and create Food Legume Councils (that include farmers, traders, and exporters) which support R&D by levying taxes or cesses on commodities and value-added products

Trends in support for research and development of cool season food legumes in the developing countries

In addition to their role in human nutrition, food legumes are an integral part of farming systems world wide in diversifying cropping systems and maintaining soil fertility. 1996 world production is around 57 million tonnes. The population in developing countries is expected to be 6.06 billion by 2010, and the demand for food legumes is expected to be around 110.65 million tonnes. This poses a challenge to scientists and policy makers to meet this demand. The growth trends during 1990-94 for area, production, and productivity globally were negative, with few exceptions. Many countries in Asia need to increase production by at least 50% by 2010, and double it by 2020, to meet the needs of the growing population. The current research and development (R&D) thrusts, in developing countries, are geared towards increased production, but with varied success. An increased reliance on plant breeding and extensive cultivation of legumes in marginal areas has led to over-exploitation of the limited genetic resources. Some national governments (eg Turkey and India) have programmes to increase production, but early successes have plateaued, and shifts in direction are needed. The major proportion (50-75%) of R&D funds in developing countries is allocated to staple cereals, and only a small portion of the remaining budget is available for legumes. The following strategies are suggested to strengthen support for food legume research: integrated cropping systems management (variety+agronomic practices+crop rotations) to bridge the yield gap in different agroclimatic conditions; strategic research to breach yield ceilings and develop cultivars that can produce high and stable yields in better-endowed environments and thus compete with cereals; strengthen research collaboration within and among national programmes and with the international agricultural research centres; increase the role of regional, networks and working groups to enhance technical cooperation among developing countries; increase the collaboration between public and private sectors and exploit their comparative advantages to achieve mutual goals; and create Food Legume Councils (that include farmers, traders, and exporters) which support R&D by levying taxes or cesses on commodities and value-added products

Ants, plants and fungi: a view on some patterns of interaction and diversity

Biodiversity is a challenging field of research. Approaches are manifold and mostly cover few aspects of the total wealth of phenomena only. The mapping of the vascular plants and the inventory of Basidiomycota in Bavaria are projects to be mentioned in this context as one part of the commitment of the author. In the following article the author describes further activities during his lifework in regard to ant–plant interactions resulting in dispersal and distribution of plants, and moreover, in respect to speciation and to evolution of high ranked taxa within the fungi, discussed mainly in relation to the genus Pleurotus and the order Boletales. In fungi the investigations include breeding systems, isolation barriers, polyploidy, pigment patterns and DNA phylogeny. The pigment patterning in Boletales correlates well with the phylogeny as revealed by DNA analysis of selected gene sections