Doğal Floradan Toplanan Aktaş Yoncalarının (Melilotus alba Desr.) Bazı Kalite Özellikleri

In turkey, one of the most important problem of livestock’s production is insufficiency of quality forage crop, but still few forage species are cultivated. On the other hand, conservation of plant genetic resources has become an important problem in the world today. Indeed, biodiversity is an indispensable element of human life, especially food, and it is estimated that 20% of these resources will extinct by 2030. The aim of study was to determine some quality traits of white sweet clover (Melilotus alba Desr.) collected from natural flora of Bilecik province. In this study, plants were collected at the flowering stage and investigated of 17 genotypes. The determined quality traits of genotypes as fallows; crude protein, ADF, NDF, RFV, K, P, Mg, Ca and Ca/P, and these traits were noted as11.99-21.07%, 27.70-40.53%, 43.31-55.84%, 93.44-147.02, 1.300-2.807%, 0.187-0.310%, 0.127-0.350%, 0.490-1.417% and 2.05-5.92%, respectively. As a result of the study, it has been determined that the quality of the white sweet clover genotypes collected from Bilecik natural flora have been sufficient for animal feeding and have a significant potential for future breeding activities.

Yarı Kurak Alanlarda Bulunan Melilotus officinalis (L.) Desr. ve Melilotus alba Desr. (Fabaceae) Taksonlarının Fitojeomorfolojik Özellikleri

This study was carried out to determine morphological, ecological and climatic properties of Melilotus officinalis (L.) Desr. and Melilotus alba Desr. taxa located natural vegetation within the Büyükyayla in Çankırı province Yapraklı district. According to the Grid system of Davis, the study area is on the A4 square and north of the Central Anatolia Region of Turkey. The climate of the study area was determined using Emberger method. Plant and soil samples were collected during the vegetation period of 2014 in the study area. Morphologically observed characters of plant height (cm), stipule (mm), racemic (cm), in the case of fruit when I racemic (cm), flowers (units), corollo (mm), wings (mm), keel (mm), standart ( mm), fruit (mm) stamen (single) (mm) stamen (united) (mm), calyx tube (mm), calyx teeth (mm), leaves (cm), petiole (cm), leaflet teeth (mm) it is demonstrated by this study. Some morphological characters of Melilotus officinalis (L.) Desr. taxa measures for plant height, corolla, fruit by Davis (1965-1988) compliance mark, the differences between my racemic have been identified. Melilotus alba Desr. taxa measures for racem, flower, corolla by Davis (1965-1988) compliance mark, the differences between my plant height have been identified. To determine the general ecological characteristics of taxa, soil samples taken from 0-30 cm, measured soil organic matter (TOM), texture, pH, bulk density (BD), electrical conductivity (EC) and the content of CaCO3%. The characteristics of the soils pH, CaCO3 and BD levels have varied between taxa. In this case, the same types of plants growing environment indicates that the request is different.

Heterologous Complementation Reveals a Specialized Activity for BacA in the Medicago–Sinorhizobium meliloti Symbiosis

The bacterium Sinorhizobium meliloti Rm2011 forms N2-fixing root nodules on alfalfa and other leguminous plants. The pSymB chromid contains a 110-kb region (the ETR region) showing high synteny to a chromosomally located region in Sinorhizobium fredii NGR234 and related rhizobia. We recently introduced the ETR region from S. fredii NGR234 into the S. meliloti chromosome. Here, we report that, unexpectedly, the S. fredii NGR234 ETR region did not complement deletion of the S. meliloti ETR region in symbiosis with Medicago sativa. This phenotype was due to the bacA gene of NGR234 not being functionally interchangeable with the S. meliloti bacA gene during M. sativa symbiosis. Further analysis revealed that, whereas bacA genes from S. fredii or Rhizobium leguminosarum bv. viciae 3841 failed to complement the Fix− phenotype of a S. meliloti bacA mutant with M. sativa, they allowed for further developmental progression prior to a loss of viability. In contrast, with Melilotus alba, bacA from S. fredii and R. leguminosarum supported N2 fixation by a S. meliloti bacA mutant. Additionally, the S. meliloti bacA gene can support N2 fixation of a R. leguminosarum bacA mutant during symbiosis with Pisum sativum. A phylogeny of BacA proteins illustrated that S. meliloti BacA has rapidly diverged from most rhizobia and has converged toward the sequence of pathogenic genera Brucella and Escherichia. These data suggest that the S. meliloti BacA has evolved toward a specific interaction with Medicago and highlights the limitations of using a single model system for the study of complex biological topics.

The role of rock mining for maintaining Dauco carotae-Crepidetum rhoeadifoliae Hejný et Grüll in Hejný et al. 1979 — a new to Poland plant association

This work presents the Dauco carotae-Crepidetum rhoeadifoliae plant association, which is new to Poland. The association has been observed in industrial reclamation areas in the vicinity of carbonate mineral excavation sites in the central part of the Opole region. In the vast majority of cases, plots of this association developed in reclaimed areas. The majority of diagnostic species for the association was found within surveyed plots, including Verbascum thapsus, V. densiflorum and Bryum argenteum. Taxa characteristic of the alliance were also constantly present, i.e. Daucus carota, Melilotus alba, M. officinalis, Echium vulgare and Erysimum hieracifolium. This association belongs to the rarest syntaxa in Poland included in the Dauco-Melilotion alliance of ruderal communities with a predominance of hemicryptophytes, therophytes and perennials. The main diagnostic species — Crepis rhoeadifolia, belongs to very rare elements of Polish flora. It has been observed only in the southern part of the country in approx. 20 sites. Crepis rhoeadifolia had not been observed in Silesia for approx. 40 years, which is why it was considered to be an extinct taxon in this region. Rediscovering of the species allowed for diagnosing the Dauco-Crepidetum rhoeadifoliae association. This association is an example of a pioneer phytocenosis of, most likely, anthropogenic origin in Silesia.