To investigate the effects of atmospheric CO2 enrichment on physiology and autumnal leaf phenology, we exposed 3-year-old sugar maple (Acer saccharum Marsh.) seedlings to 800 (A8), 600 (A6), and 400 μL(CO2) L-1 (AA) in nine continuous stirred tank reactor (CSTR) chambers during the growing season of 2014. Leaf abscission timing, abscised leaf area percentages, leaf number, light-saturated net photosynthetic rate (PNmax), leaf area, accumulative growth rates, and biomass were determined and assessed. The results suggested the following: (1) no significant differences were found in the timing of leaf abscission in the three CO2-concentration treatments; (2) PNmax was continuously stimulated to the greatest extent in A8 at 319% and 160% in A6 until the end of the growing season, respectively; and (3) leaf number, leaf area, and accumulative height growth all significantly increased by elevated CO2, which led to a 323% increase in A8 biomass and 235% in A6 biomass after 156-d fumigation. In summary, the results suggest, the timing of leaf abscission of sugar maple in fall was not modified by CO2 enrichment, the increased carbon gain by elevated CO2 was mainly due to increased leaf area, more leaves, and the continuously enhanced high photosynthesis throughout the growing season instead of the leaf life span., L. Li, W. J. Manning, X. K. Wang., and Obsahuje bibliografii
We feature an interview with Professor Eva Za2imalova, a member of the Academy Council and the head of the Laboratory of Hormonal Regulation in Plants at the Institute of Experimental Botany of the ASCR. From 2007 to 2012 she was director of this institute. Her research is in the fields of auxin and cytokinins (mode of action of auxin. auxin binding site(s), regulation of levels of auxins and cytokinins in relation to cell division and elongation and themechanism of polar transport of auxin). and Marina Hužvárová.
This paper examines the possibility and the desirability of axiomatization in law. In the first part, the paper examines the notion of axiom and the ways how it was or could be introduced into law. It is here where the authors openly invite the reader to lose the conventional approach and think about alternative ways to build basic legal concepts. In the second part, the paper continues by presenting several theories which endeavored (or appeared to endeavor) to show that law can (and should be) axiomatized and which even attempted to axiomatize it. After establishing whether these theories were successful at all, the authors add some of their own ideas on the topic of axiomatization., Martin Madej, Filip Horák., and Obsahuje bibliografické odkazy