イネ科26属42種における茎片からのクローン形成特性

概要

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The objective of this study was to examine the characteristics of cloning from stem segment in Poaceae species for WRA modeling. For the purpose, forty-two Poaceae species causing trouble as weedy or invasive plants in Japan were obtained, and stems of these species were cut into several segments, 20 cm length with one node. The segments were then soaked in the distilled water at 25degree C with 12 h of lights for 28 days. Checking the cloning from stem segments, among the forty-two Poaceae species tested, the cloning was observed in the seventeen species (40.5 % of all). These results would indicate that stem segments of some Poaceae species became a medium for their propagation and/or dispersal like rhizome and seed. Therefore, it would be useful as a measure of WRA to check the cloning from stem segments of Poaceae species. On the other hand, many species that formed clone were occupied by the exotic species possessing moisture tolerance and turf type. Moreover, the cloning from stem segment was observed in many exotic species, which listed in 100 of the Worst Invasive Alien Species in Japan by the Ecological Society of Japan and/or regulated under Invasive Alien Species Act by Japanese Ministry of Environment.