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Anatomical and Morphological Features of Seeds in Portulaca
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  • Journal title : Applied Microscopy
  • Volume 42, Issue 4,  2012, pp.194-199
  • Publisher : Korean Society of Electron Microscopy
  • DOI : 10.9729/AM.2012.42.4.194
 Title & Authors
Anatomical and Morphological Features of Seeds in Portulaca
Kim, InSun;
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 Abstract
The anatomy and morphology of seeds from 10 Hawaiian Portulaca taxa were examined to explore patterns of variation among the taxa, and to evaluate their phylogenetic relationships. Features of seeds were assessed employing microtechnique procedures, statistical analysis, and scanning electron microscopy (SEM). Anatomically, the orientation of embryo was consistent across taxa, and all seeds examined had central nutritive tissue and integuments comprising the peripheral embryo. Seeds were generally small, circular to ovoid in shape, and either smooth or rough-surfaced, with tubercules. Variation in seed size was noted, although minimal within small seeded group. The size of seeds ranged from 0.50~1.26 mm in length, and 0.55~1.34 mm in width, with similar weights. Seeds were distinguished by the sculpture and arrangement of the testa epidermis and the way in which their stellulate-tessellate cells uniquely fit together. Using a multiple range test (ANOVA), two groups were established by seed characteristics. The SEM also demonstrated morphological differences in testa sculpturing. The results obtained confirm the usefulness of seed characteristics in the identification of the species examined, and furthermore, allow for the separation of the Hawaiian Portulaca into two groups.
 Keywords
Hawaiian Portulaca;Morphology;Seed;Testa sculpturing;
 Language
English
 Cited by
1.
Ambient Variable Pressure Field Emission Scanning Electron Microscopy for Trichome Profiling of Plectranthus tomentosa by Secondary Electron Imaging,;

Applied Microscopy, 2013. vol.43. 1, pp.34-39 crossref(new window)
2.
Anatomy and Morphology of Two Hawaiian Endemic Portulaca Species,;

Applied Microscopy, 2014. vol.44. 2, pp.41-46 crossref(new window)
 References
1.
Atwater B R (1980) Germination, dormancy and morphology of the seeds of herbaceous ornamental plants. Seed Sci. Technol. 8, 523-573.

2.
Baldwin B G and Wagner W L (2010) Hawaiian angiosperm radiations of North American origin. Ann. Bot. 105, 849-879. crossref(new window)

3.
Carolin R (1987) A review of the family Portulacaceae. Aust. J. Bot. 35, 383-412. crossref(new window)

4.
Chamorro S, Heleno R, Olesen J M, McMullen C K, and Traveset A (2012) Pollination patterns and plant breeding systems in the Galapagos: a review. Ann. Bot. 110, 1489-1501. crossref(new window)

5.
Kim I and Carr G D (1990a) Cytogenetics and hybridization of Portulaca in Hawaii. Syst. Bot. 15, 370-377. crossref(new window)

6.
Kim I and Carr G D (1990b) Reproductive biology and uniform culture of Portulaca in Hawaii. Pac. Sci. 44, 123-129.

7.
Kim I and Fisher D G (1990) Structural aspects of the leaves of seven species of Portulaca growing in Hawaii. Can. J. Bot. 68, 1803-1811. crossref(new window)

8.
Matthews J F, Faircloth W R, and Allison J R (1991) Portulaca biloba Urban (Portulacaceae), a species new to the United States. Syst. Bot. 16, 736-740. crossref(new window)

9.
Matthews J F and Ketron D W (1991) Two new combinations in Portulaca (Portulacaceae). Castanea 56, 304-305.

10.
Matthews J F, Ketron D W, and Zane S F (1992) The reevaluation of Portulaca pilosa and P. mundula (Portulacaceae). Sida 15, 71-89.

11.
Matthews J F, Ketron D W, and Zane S F (1994) The seed surface morphology and cytology of six species of Portulaca (Portulacaceae). Castanea 59, 331-337.

12.
Matthews J F and Levins P A (1985a) Portulaca pilosa L., P. mundula I. M. Johnst. and Portulaca parvula Gray in the Southwest. Sida 11, 45- 61.

13.
Matthews J F and Levins P A (1985b) The genus Portulaca in the Southeastern United States. Castanea 50, 96-104.

14.
Matthews J F and Levins P A (1986) The systematic signifi cance of seed morphology in Portulaca (Portulacaceae) under scanning electron microscopy. Syst. Bot. 11, 302-308. crossref(new window)

15.
Myanishi K and Cavers P B (1980) The biology of Canadian weeds. 40. Portulaca oleracea L. Can. J. Pl. Sci. 60, 953-963. crossref(new window)

16.
Nyananyo B L and Okoli B E (1987) Cytological and morphological studies on Nigerian species of Portulaca (Portulacaceae) in relation to their taxonomy. Fedd. Repert. 98, 583-587.

17.
Plaza L, Fernandez I, Juan R, Pastor J, and Pujadas A (2004) Micromorphological studies on seeds of Orobanche species from the Iberian Peninsula and the Balearic Islands, and their systematic signifi cance. Ann. Bot. 94, 167-178. crossref(new window)

18.
Yun I K (1989) Biosystematics and ultrastructure of Portulaca in Hawaii. Ph.D. dissertation, (University of Hawaii at Manoa, Honolulu).

19.
Zimmerman C A (1976) Growth characteristics of weediness in Portulaca oleracea L. Ecology 57, 964-974. crossref(new window)