Chromosomal observations on Eliea (Hypericaceae), a monospecific Madagascar endemic
DOI:
https://doi.org/10.17348/jbrit.v17.i1.1295Abstract
A meiotic chromosome number of n=9 is reported for Eliea articulata, a monospecific genus of Hypericaceae endemic to Madagascar. This first report for the genus is a new number for the small tribe Cratoxlyeae which includes only one other genus, Cratoxylum. A hypothetical scenario for the origin of n=9 is provided in the context of known chromosome numbers for Cratoxylum and the two other tribes in the Hypericaceae. Given that x=12 has been proposed as the basic chromosome number for the family with numbers of n=11 and n=10 also reported for related species and genera, n=9 appears to have arisen as a descending dysploid from these higher numbers. Field photos of Eliea articulata are provided along with a distribution map and camera lucida drawings of meiotic chromosome figures.
References
CHRISTENHUSZ, M.J.M., M.F. FAY, & M.W. CHASE. 2017. Plants of the world: An illustrated encyclopedia of vascular plants. Royal Botanic Gardens, Kew, UK and University of Chicago Press, Illinois, U.S.A.
FEDEROV, A.A., ED. 1974. Chromosome numbers in flowering plants. Academy of Sciences of the U.S.S.R., Komarov Botanical Institute, Lenin-grad.
GBIF.org 2023. GBIF Occurrence Download. https://doi.org/10.15468/dl.2x4cbv
GILL, B.S., S.S. BIR, & V.K. SINGHAL. 1979. Chromosome number reports LXV. Taxon 28:630.
GOGELEIN, A.J.F. 1967. A revision of the genus Cratoxylum Bl. (Guttiferae). Blumea 15:453–475.
GOLDBLATT, P. & M.E. POSTON. 1988. Observations on the chromosome cytology of Velloziaceae. Ann. Missouri Bot. Gard. 75:192 ?195.
GOUVENEIN, R.C. DE & J.A. SILANDER, JR. 2003. Littoral forest. In: S.M. Goodman and J.P. Benstead, eds. The natural history of Madagascar. University of Chicago Press, Chicago, Illinois, U.S.A. Pp. 103–111.
HAMMEL, B. 2007. Hypericaceae. In: B. Hammel, M.H. Grayum, C. Herrera, & N. Zamora, eds. Manual de Plantas de Costa Rica. Vol. VI. Dicotiledóneas (Haloragaceae-Phytolaccaceae). Missouri Botanical Garden, St. Louis. Pp. 26–31.
JONES, K. 1970. Chromosome changes in plant evolution. Taxon 19:172–179.
NÜRK, N.M., S. MADRIÑÁN, M.A. CARINE, M.W. CHASE, & F.R. BLATTNER. 2012. Molecular phylogenetics and morphological evolution of St. John’s wort (Hypericum: Hypericaceae). Molec. Phylogen. Evol. 66:1–16.
QGIS DEVELOPMENT TEAM. 2023. QGIS Geographic Information System. Open Source Geospatial Foundation Project. Available from: http://qgis.org (accessed 17 February 2023)
R CORE TEAM. 2018. R: A language and environment for statistical computing. Vienna, Austria. Available from: https://www.r.project.org/ (accessed 20 February 2023)
RABAKONANDRIANINA, E. & G.D. CARR. 1987. Chromosome numbers of Madagascar plants. Ann. Missouri Bot. Gard. 74:123–125.
RANARIVELO, H.S. 2017. Systematics, niogeography, and species delimitation of the Malagasy Psorospermum (Hypericaceae). Dissertations. 690. https://irl.umsl.edu/dissertation/690
ROBSON, N.K.B. 1974. Hypericaceae. In: C.G.G.J. van Steenis, ed. Flora Malesiana I, 8:1–29. Noordhoff, Leiden, The Netherlands.
ROBSON, N.K.B. 1981. Studies in the genus Hypericum L. (Guttiferae). 2. Characters of the genus. Bull. British Mus. Nat. Hist. Bot. 8:55–226.
ROBSON, N.K.B. 2012 Studies in the genus Hypericum L. (Hypericaceae) 9. Addenda, corrigenda, keys, lists, and general discussion. Phytotaxa 72:1–111.
ROBSON, N.K.B. & P. ADAMS. 1968. Chromosome numbers in Hypericum and related genera. Brittonia 20:95–106.
RUHFEL, B.R. 2011. Systematics and biogeography of the Clusioid clade (Malpighiales). Biological Sciences Faculty and Staff Research 3. https://encompass.eku.edu/bio_fsresearch/3
RUHFEL, B.R., V. BITTRICH, C.P. BOVE, M.H.G. GUSTAFSSON, C.T. PHILBRICK, R. RUTISHAUSER, Z. XI, & C.C. DAVIS. 2011. Phylogeny of the clusioid clade (Malpighiales): Evidence from plastid and mitochondrial genomes. Amer. J. Bot. 98:306–325.
SCHATZ, G.E. 2001. Generic tree flora of Madagascar. Royal Botanic Gardens, Kew, UK and Missouri Botanical Garden. St. Louis, U.S.A.
SINGHAL, V.K., B.S. GILL, & S.S. BIR. 1985. Cytology of woody species. Proc. Indian Acad. Sci. (sect. B) 94:607–617.
STEVENS, P.F. 2007. Hypericaceae. In: Kubitski, K., ed. The families and genera of vascular plants. Springer Verlag, Berlin, Germany. Pp. 194–201.
TIXIER, P. 1953. Données cytologiques sur quelques Guttiférales du Viet-Nam. Rev. Cytol. et Biol. Vég. 14:12.
ZIZKA, A., D. SILVESTRO, T. ANDERMANN, J. AZEVEDO, C. DUARTE RITTER, D. EDLER, H. FAROOQ, A. HERDEAN, M. ARIZA, R. SCHARN, S. SVANTESSON, N. WENG-STRÖM, V. ZIZKA, & A. ANTONELLI. 2019. CoordinateCleaner: Standardized cleaning of occurrence records from biological collection databases. Methods Ecol. Evol. 10:744–751.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2023 Botanical Research Institute of Texas
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
