This paper aims to present an informative overview of early modern Bohemical manuscripts ar Herzog August Bibliothek i Wolfenbüttel. Attention focuses primarily upot the Latin correspondence between Czech humanists and those abroad, though the overview also includes other genres and languages (Czech abd German). Of the previously unknown non-epistolary manuscripts, the discoveries of original manuscripts by Lutheran pastor Zacharias Theobald and Siegmund Schererz can be considered to be of interest.
This study deals with the historiography of the mining town Jáchymov. In the 16th century a few historiographic works originated, the most attractive of which being the chronicle by Johan Mathesius, a pastor in Jáchymov, and his folllowers. The works by Johan Seltenreich and David Hüter, local scribes, are less known. The writings are housed in the Jáchymov Municipal Archive and in the National Museum Archive in Prague.
Pea (Písum sativum L.) leaves fully developed under either high or low irradiance were exposed for up to 30 h to dark oř limiting, saturating oř excessive iřřadiance. The time courses of degradation of a popidation of radioactively prelabelled Dl protein and the fluorescence parameter Fv/Fm, measured on intact leatf discs at room temperature were studied. The Dl protein degradation was shown to be dependent on irradiance but not directly correlated with changes in photosynthetic capacity. The irradiance dependence of Dl protein degradation was different in the two types of leaves and it occurred at a slow but significant rate in the daik. The irradiance dependence of Dl degradation tnay be associated with the 3-dimensional structure of the thylakoid membrane and is suggested to play a key role in flie regulation of radiant energy absorption and photosynthetic capacity of flie leaves.
The source-sink relationship is one of major determinants of plant performance. The influence of reproductive sink demand on light-saturated photosynthesis (Pmax), dark respiration (RD), stomatal conductance (gs), intrinsic water-use efficiency (WUEi), contents of soluble sugar (SSC), nitrogen, carbon, and photosynthetic pigments was examined in blueberry (Vaccinium corymbosum L. cv. ‘Brigitta’) during the final stage of rapid fruit growth. Measurements were performed three times per day on developed, sun-exposed leaves of girdled shoots with 0.1, 1, and 10 fruit per leaf (0.1F:L, 1F:L, and 10F:L, respectively) and nongirdled shoots bearing one fruit per leaf (NG). Girdling and lower fruit amount induced lower Pmax, gs, N, and total chlorophyll (Chl) and higher WUEi, SSC, RD, Chl a/b ratio and carotenoids-to-chlorophylls ratio (Car/Chl) for the 1F:L and 0.1F:L treatments. The impact of girdling was counterbalanced by 10F:L, with NG and 10F:L having similar values. Variables other than Pmax, RD, gs, WUEi, and SSC were unaffected throughout the course of the day. Pmax and gs decreased during the course of the day, but gs decreased more than Pmax in the afternoon, while WUEi was increasing in almost all treatments. SSC increased from the morning until afternoon, whereas RD peaked at noon regardless of the treatment. Generally, Pmax was closely and negatively correlated to SSC, indicating that sugar-sensing mechanisms played an important role in regulation of blueberry leaf photosynthesis. With respect to treatments, Pmax and N content were positively related, while RD was not associated to substrate availability. The enhanced Car/Chl ratio showed a higher photoprotection under the lower sink demand. Changes in the source-sink relationship in 'Brigitta' blueberry led to a rearrangement of physiological and structural leaf traits which allowed adjusting the daily balance between carbon assimilation and absorbed light energy., E. Jorquera-Fontena, M. Alberdi, M. Reyes-Díaz, N. Franck., and Obsahuje bibliografii