caa a22 4500 463168240 CHVBK 20180406164805.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10530-006-9038-0 doi (NATIONALLICENCE)springer-10.1007/s10530-006-9038-0 Timing and extent of tissue removal affect reproduction characteristics of an invasive species Heracleummantegazzianum [Elektronische Daten] [Petr Pyšek, Lukáš Krinke, Vojtěch Jarošík, Irena Perglová, Jan Pergl, Lenka Moravcová] Response of the invasive species Heracleummantegazzianum to experimental removal of tissues was studied in the Czech Republic. The study aimed at determining (i) how efficiently plants respond, in terms of quantity and quality of produced fruit, to the removal of different amounts of generative and/or vegetative tissues; and (ii) whether regeneration ability depends on the time of treatment. Total number of fruits and their mean weight were reduced by removal of leaves, but germination percentage and rate of germination did not differ from control. More vigorous individuals compensated for the loss of tissues to a higher degree, and the advantage of being larger increased with severity of the treatment. Of 40 plants with umbels completely removed, 18 (45.0%) regenerated and produced on average 103.4±220.1 (mean±SD) fruits. Total fruit numbers and total fruit weight of regenerating plants significantly differed neither among treatments nor from the control, but some treatments resulted in poorer germination compared to the control. Umbels removed from plants at the beginning of fruit development and left at the locality produced 18.6% of fruit numbers of control plants, and 24% of these seeds germinated. Control by removing umbels from plants must ensure that they are collected and destroyed. From the management viewpoint, there is a trade-off between later umbel removal, resulting in more efficient reduction in fecundity but necessity to handle more developed fruits, and early treatment, leading to a high regeneration, that produces seed of sufficient quantity and very little affected in terms of quality. Springer Science+Business Media B.V., 2006 Alien plant nationallicence Compensatory growth nationallicence Fruit production nationallicence Fruit weight nationallicence Mechanical control nationallicence Seed germination nationallicence Pyšek Petr Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut Krinke Lukáš Department of Botany, Faculty of Sciences, Charles University, Benátská 2, CZ-128 01, Praha 2, Czech Republic aut Jarošík Vojtěch Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut Perglová Irena Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut Pergl Jan Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut Moravcová Lenka Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut Biological Invasions Kluwer Academic Publishers 9/3(2007-04-01), 335-351 1387-3547 9:3<335 2007 9 10530 https://doi.org/10.1007/s10530-006-9038-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10530-006-9038-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pyšek Petr Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut NATIONALLICENCE 700 1- Krinke Lukáš Department of Botany, Faculty of Sciences, Charles University, Benátská 2, CZ-128 01, Praha 2, Czech Republic aut NATIONALLICENCE 700 1- Jarošík Vojtěch Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut NATIONALLICENCE 700 1- Perglová Irena Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut NATIONALLICENCE 700 1- Pergl Jan Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut NATIONALLICENCE 700 1- Moravcová Lenka Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic aut NATIONALLICENCE 773 0- Biological Invasions Kluwer Academic Publishers 9/3(2007-04-01), 335-351 1387-3547 9:3<335 2007 9 10530 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer