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Stem anatomy of Apioideae (Apiaceae): effects of habit and reproductive strategy

In: IAWA Journal
Authors:
Kamil E. Frankiewicz Institute of Evolutionary Biology, Faculty of Biology, University of Warsaw, Biological and Chemical Research Centre, Żwirki i Wigury 101, 02-089 Warsaw, Poland

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https://orcid.org/0000-0003-2638-7007
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Alexei A. Oskolski Department of Botany and Plant Biotechnology, University of Johannesburg, PO Box 524, 10 Auckland Park, 2006 Johannesburg, South Africa
Botanical Museum, Komarov Botanical Institute, Prof. Popov 2, 197376 St. Petersburg, Russia

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https://orcid.org/0000-0001-6205-8492
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Jean-Pierre Reduron , Via Apia, 10 rue de l’Arsenal, 68100 Mulhouse, France

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Łukasz Banasiak Institute of Evolutionary Biology, Faculty of Biology, University of Warsaw, Biological and Chemical Research Centre, Żwirki i Wigury 101, 02-089 Warsaw, Poland

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https://orcid.org/0000-0001-9846-023X
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Jorge-Alfredo Reyes-Betancort Jardín de Aclimatación de la Orotava, Instituto Canario de Investigaciones Agrarias (ICIA), C/Retama no. 2, 38400 Puerto de la Cruz, S/C de Tenerife, Spain

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Paulina Trzeciak Faculty of Biology and Veterinary Sciences, Nicolaus Copernicus University, Lwowska 1, 87-100, Toruń, Poland

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Krzysztof Spalik Institute of Evolutionary Biology, Faculty of Biology, University of Warsaw, Biological and Chemical Research Centre, Żwirki i Wigury 101, 02-089 Warsaw, Poland

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https://orcid.org/0000-0001-9603-6793
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Summary

Apioideae is the biggest and the most diverse of four subfamilies recognised within Apiaceae. Except for a few, likely derived, woody clades, most representatives of this subfamily are herbaceous. In the present study, we assessed stem anatomy of 87, mostly therophytic and hemicryptophytic, species from at least 20 distinct lineages of Apioideae, and juxtaposed them with 67 species from our previous anatomical projects also focused on this subfamily. Comparing our data with the literature, we found that wood anatomy does not allow for a distinction between apioids and their close relatives (Azorelloideae, Saniculoideae), but more distantly related Mackinlayoideae differ from Apioideae in their perforation plate type. Vessel element and fibre length, and vessel diameter were positively correlated with plant height: phenomena already reported in literature. Similar pattern was retrieved for vertical intervessel pit diameter. Wood ground tissue in apioids ranges from entirely fibrous to parenchymatous. The shortening of internodes seems to favour the formation of parenchymatic ground tissue, whereas the early shift to flowering promotes the deposition of fibrous wood in monocarpic species. These results support a hypothesis on interdependence among internode length, reproductive strategy, and wood ground tissue type.

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