EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Iron-rich particles and globoids in embryos of seeds from phyla Coniferophyta, Cycadophyta, Gnetophyta, and Ginkgophyta: Characteristics of early seed plants



Iron-rich particles and globoids in embryos of seeds from phyla Coniferophyta, Cycadophyta, Gnetophyta, and Ginkgophyta: Characteristics of early seed plants



Canadian Journal of Botany 80(9): 954-961, September



For the first time, iron-rich particles were discovered in embryo-axis tissue from dry seeds of genera in four phyla of seed-producing plants. Iron-rich particles were present in dry seeds of phyla Ginkgophyta (Ginkgo), Cycadophyta (Dioon), Gnetophyta (Ephedra), and within the Coniferophyta, representatives of the families Araucariaceae, Cephalotaxaceae, Cupressaceae, Podocarpaceae, Sciadopityaceae, and Taxaceae. These iron-rich particles were determined by energy dispersive X-ray analysis to be rich in phosphorus and iron, but generally contained considerable potassium, some magnesium, and perhaps calcium, chlorine, manganese, and (or) zinc. Transmission electron microscopy revealed that these particles were often less than 0.33 mum in diameter and were naturally electron dense. These particles differed from the globoids that were present in the same cells. Globoids were rich in phosphorus, potassium, and magnesium, but lacked high levels of iron. Globoids sometimes contained calcium and perhaps traces of iron, manganese, and zinc. Frequently, globoids were more electron-dense and more regularly spherical in shape. Iron-rich particles and globoids are apparently common features in embryos of the early seed plants.

(PDF emailed within 0-6 h: $19.90)

Accession: 010885556

Download citation: RISBibTeXText

DOI: 10.1139/b02-083



Related references

Mineral nutrition in White Spruce Voss seeds and somatic embryos; II EDX analysis of globoids and Fe-rich particles. In Vitro Cellular & Developmental Biology Plant 35(4): 303-308, 1999

Characterization of globoids and iron-rich particles in cotyledons of Pinus banksiana seeds and seedlings. Canadian Journal of Forest Research 26(9): 1697-1702, 1996

Mineral nutrition in white spruce (Picea glauca (Moench) Voss) seeds and somatic embryos; II. EDX analysis of globoids and Fe-rich particles. Plant Science Limerick 141(1): 19-27, 1999

Iron-rich particles in embryos of seeds from the family Pinaceae. Protoplasma 202(3-4): 122-133, 1998

Cycadophyta and Coniferophyta from the Lias of M Palombo Marsica, central Apennines. Geologica Romana 7(Pages 1-11, 1968

Some cycadophyta and coniferophyta of the middle jurassic of the cualac region guerrero mexico. Universidad Nacional Autonoma de Mexico Instituto de Geologia Revista 7(2): 244-248, 1988

Some Bennettitales (Cycadophyta) and Coniferales (Coniferophyta) from the Middle Jurassic of the Cualac area, Guerrero. Revista - Instituto de Geologia 7(2): 244-248, 1988

Presence of Otozamites (Cycadophyta) and Podozamites (Coniferophyta) in the Upper Jurassic (Kimmeridgian-Tithonian) of southern Veracruz. Revista - Instituto de Geologia 10(1): 94-97, 1992

Combined LM and SEM study of the Middle Miocene (Sarmatian) palynoflora from the Lavanttal Basin, Austria: Part I. Bryophyta, Lycopodiophyta, Pteridophyta, Ginkgophyta, and Gnetophyta. Grana 50(2): 102-128, 2011

Changes in the element composition of globoids and whole embryos in developing seeds of Cucurbita maxima. Seed Science Research 11(1): 35-44, 2001

Characteristics and reactivity of protein bodies and their globoids in different tissues of the cotyledons of Helianthus annuus L. (Asteraceae) seeds. Acta Botanica Gallica 144(1): 95-106, 1997

Globoids in the cotyledons of Helianthus annuus L.: microanalysis, cytochemical cytoenzymological studies into the dry seeds and during early stages of hydration. Acta Botanica Gallica 149(1): 79-95, 2002

Development of high-gossypol cotton plants with low-gossypol seeds using trispecies bridge crosses and in vitro culture of seed embryos. Euphytica 106(3): 243-251, 1999

The effects of feeding area on the morphological characteristics on seed plants and seeding qualities of hybrid seeds. 2007

Efficient production of triploid melon plants by in vitro culture of abnormal embryos excised from dried seeds of diploid X tetraploid crosses and their characteristics. Japanese Journal of Breeding 43(2): 193-199, 1993