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Morphology and Cytology of Pea Embryos During Histogenesis

Graeme A. King, J. K. Heyes

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Abstract

Cytological examination showed that day 3 pea embryo cells were undifferentiated in terms of morphological or gross cytological appearance. Histogenesis had commenced by day 4 and was accompanied by cytological differentiation with a gradient in vacuolation apparent along the root/shoot axis. Day 3 embryonic cells were cytologically different from meristematic (day 4 and 5) cells of the shoot apex. Cells of the embryo base appeared to have an intimate association with the middle suspensor cells.

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Cytological examination showed that day 3 pea embryo cells were undifferentiated in terms of morphological or gross cytological appearance. Histogenesis had commenced by day 4 and was accompanied by cytological differentiation with a gradient in vacuolation apparent along the root/shoot axis. Day 3 embryonic cells were cytologically different from meristematic (day 4 and 5) cells of the shoot apex. Cells of the embryo base appeared to have an intimate association with the middle suspensor cells.

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Available abstract

Cytological examination showed that day 3 pea embryo cells were undifferentiated in terms of morphological or gross cytological appearance. Histogenesis had commenced by day 4 and was accompanied by cytological differentiation with a gradient in vacuolation apparent along the root/shoot axis. Day 3 embryonic cells were cytologically different from meristematic (day 4 and 5) cells of the shoot apex. Cells of the embryo base appeared to have an intimate association with the middle suspensor cells.

Key concepts: Histogenesis, Biology, Suspensor, Embryo, Meristem, Botany, Cytology, Apex (geometry)

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