Notes on floral traits and gender expression of Dryas octopetala under a simulated environmental change
This study presents empirical data for variations of floral traits and gender expression in Arctic Dryas octopetala L. under a simulated environmental amelioration using an open-top chamber (OTC). The short-term experiment (from 8 August 1997 to 2 August 1998) demonstrated in Ny-Alesund, Svalbard th...
| Main Authors: | , |
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| Format: | Report |
| Language: | English |
| Published: |
Department of Biosphere Science, Faculty of Science, Toyama University
2000
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| Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6154 http://id.nii.ac.jp/1291/00006154/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6154&item_no=1&attribute_id=18&file_no=1 |
| Summary: | This study presents empirical data for variations of floral traits and gender expression in Arctic Dryas octopetala L. under a simulated environmental amelioration using an open-top chamber (OTC). The short-term experiment (from 8 August 1997 to 2 August 1998) demonstrated in Ny-Alesund, Svalbard that dry weights of gynoecium, peduncle, and hermaphrodite flowers were significantly heavier, whereas petal and androecium weight were significantly lighter in OTC-manipulated shoots than in controls. As a result, "femaleness" (dry-weight allocation to the female organs) showed a significantly higher value in OTC-manipulated shoots as compared to the controls. Moreover, femaleness was significantly positively correlated with flower weight both in OTC-manipulated and control shoots. Thus, it was experimentally demonstrated that the gender as a reproductive effort of D. octopetala flowers changed from male- to female-biased expression under a less stressful condition. |
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