NDLI: Timing and extent of tissue removal affect reproduction characteristics of an invasive species Heracleum mantegazzianum

Content Provider	Springer Nature Link
Author	Pyšek, Petr Krinke, Lukáš Jarošík, Vojtěch Perglová, Irena Pergl, Jan Moravcová, Lenka
Copyright Year	2006
Abstract	Response of the invasive species Heracleum mantegazzianum 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.
Starting Page	335
Ending Page	351
Page Count	17
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	9
Issue Number	3
e-ISSN	15731464
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-11-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alien plant Compensatory growth Fruit production Fruit weight Mechanical control Seed germination Plant Sciences Forestry Zoology Hydrobiology Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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