caa a22 4500 46315987X CHVBK 20180406164744.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10535-007-0105-x doi (NATIONALLICENCE)springer-10.1007/s10535-007-0105-x Regrowth dynamics of Calamagrostis epigejos after defoliation as affected by nitrogen availability [Elektronische Daten] [V. Gloser, M. Košvancová, J. Gloser] Young plants of a rhizomatous grass Calamagrostis epigejos (L.) Roth were grown from seed in nutrient solutions containing nitrogen in concentrations 0.1, 1.0, and 10 mM. After six weeks of cultivation the plants were defoliated and changes in growth parameters and in content of storage compounds were measured in the course of regrowth under highly reduced nitrogen availability. Plants grown at higher nitrogen supply before defoliation had higher amount of all types of nitrogen storage compounds (nitrates, free amino acids, soluble proteins), which was beneficial for their regrowth rate, in spite of lower content of storage saccharides. Amino acids and soluble proteins from roots and stubble bases were the most important sources of storage compounds for regrowth of the shoot. Faster growth of plants with higher N content was mediated by greater leaf area expansion and greater number of leaves. In plants with lower contents of N compounds number of green leaves decreased after defoliation significantly and senescing leaves presumably served as N source for other growing organs. Results suggest that internal N reserves can support regrowth of plants after defoliation even under fluctuating external N availability. Faster regrowth of C. epigejos with more reserves was mediated mainly by changes in plant morphogenesis. Institute of Experimental Botany, ASCR, 2007 amino acids nationallicence nitrates nationallicence nitrogen storage compounds nationallicence non-structural saccharides nationallicence soluble proteins nationallicence Gloser V. Department of Plant Physiology and Anatomy, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137, Brno, Czech Republic aut Košvancová M. Department of Plant Physiology and Anatomy, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137, Brno, Czech Republic aut Gloser J. Department of Plant Physiology and Anatomy, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137, Brno, Czech Republic aut Biologia Plantarum Kluwer Academic Publishers-Consultants Bureau 51/3(2007-09-01), 501-506 0006-3134 51:3<501 2007 51 10535 https://doi.org/10.1007/s10535-007-0105-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10535-007-0105-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gloser V. Department of Plant Physiology and Anatomy, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137, Brno, Czech Republic aut NATIONALLICENCE 700 1- Košvancová M. Department of Plant Physiology and Anatomy, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137, Brno, Czech Republic aut NATIONALLICENCE 700 1- Gloser J. Department of Plant Physiology and Anatomy, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137, Brno, Czech Republic aut NATIONALLICENCE 773 0- Biologia Plantarum Kluwer Academic Publishers-Consultants Bureau 51/3(2007-09-01), 501-506 0006-3134 51:3<501 2007 51 10535 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer