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Floral phenology and morphology of colchicine-induced tetraploid Acacia mangium compared with diploid A. mangium and A. auriculiformis: implications for interploidy pollination
Citation
Nghiem, CQ and Harwood, CE and Harbard, JL and Griffin, AR and Ha, TH and Koutoulis, A, Floral phenology and morphology of colchicine-induced tetraploid Acacia mangium compared with diploid A. mangium and A. auriculiformis: implications for interploidy pollination, Australian Journal of Botany, 59, (6) pp. 582-592. ISSN 0067-1924 (2011) [Refereed Article]
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Copyright Statement
Copyright © 2011 CSIRO
DOI: doi:10.1071/BT11130
Abstract
Floral phenology and morphology of colchicine-induced auto-tetraploid trees of Acacia mangium Willd. (AM-4x) growing in Vietnam were compared with adjacent diploid A. mangium (AM-2x) and A. auriculiformis A.Cunn. ex Benth (AA-2x). Flowering lasted for several months with a slightly later peak flowering period for A. auriculiformis (December–January), than for A. mangium (November–December). Flower spikes of AM-4x were shorter and had fewer flowers per spike than those of AM-2x, but were longer and had more flowers than AA-2x. Percentages of male to hermaphrodite flowers were less than 23% for all three species/ploidy combinations. Flowers of AM-4x had slightly shorter styles than did AM-2x, but AM-4x stigma and polyad diameters were greater. For all polyad-stigma combinations among species/ploidy levels, at least one polyad could be accommodated. AM-4x had fewer (13) ovules per ovary, compared with AM-2x and AA-2x (14–16). AM-4x set fewer (less than 3) seeds per pod than did AM-2x and AA-2x (7–8 and 5–6, respectively). Foraging behaviour of the main insect pollinators (honeybees) and examination of polyads collected from them suggested interspecific and interploidy pollination would occur. There appeared to be no phenophase or flower structure barriers to interploidy pollination.
Item Details
Item Type: | Refereed Article |
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Research Division: | Biological Sciences |
Research Group: | Plant biology |
Research Field: | Plant developmental and reproductive biology |
Objective Division: | Plant Production and Plant Primary Products |
Objective Group: | Forestry |
Objective Field: | Hardwood plantations |
UTAS Author: | Harbard, JL (Ms Jane Harbard) |
UTAS Author: | Griffin, AR (Professor Rod Griffin) |
UTAS Author: | Koutoulis, A (Professor Anthony Koutoulis) |
ID Code: | 75903 |
Year Published: | 2011 |
Web of Science® Times Cited: | 21 |
Deposited By: | Plant Science |
Deposited On: | 2012-02-20 |
Last Modified: | 2012-04-17 |
Downloads: | 2 View Download Statistics |
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