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Changes in the composition of globoids in castor bean cotyledons and endosperm during early seedling growth with and without complete mineral nutrients

Published online by Cambridge University Press:  19 September 2008

John N.A. Lott*
Affiliation:
Department of Biology, McMaster University, Hamilton, Ontario, L8S 4K1Canada
M. Marcia West
Affiliation:
Department of Biology, McMaster University, Hamilton, Ontario, L8S 4K1Canada
Ben Clark
Affiliation:
Department of Biology, McMaster University, Hamilton, Ontario, L8S 4K1Canada
Penny Beecroft
Affiliation:
Department of Biology, McMaster University, Hamilton, Ontario, L8S 4K1Canada
*
*Correspondence

Abstract

The endosperm and cotyledon tissues of Ricinus communis seeds and young seedlings were examined for changes in the mineral nutrient composition of globoids during early seedling growth. The effect on globoid composition of providing mineral nutrients to the developing seedling was also investigated. Globoids in endosperm and cotyledon tissues of castor bean seeds contained P, Mg and K, as well as trace amounts of Ca, Fe and Zn. Irrespective of the addition of mineral nutrients, K content in globoids of endosperm and cotyledon tissues declined significantly during initial seedling growth. During early seedling growth, amounts of Fe, Zn and Ca increased in cotyledon globoids. Ca contents of globoids of endosperm tissues also increased. The changes in Fe, Zn and Ca globoid contents were not influenced by providing mineral nutrients to growing castor bean seedlings.

Type
Short Communication
Copyright
Copyright © Cambridge University Press 1995

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