Abstract
The cereal endosperm transport tissues commonly consist of endosperm transfer cells, endosperm conducting cells, and the embryo surrounding region. In this paper, the three endosperm transport tissues in wheat were observed using light, fluorescence, and electron microscopy. The results were as the following: (1) wall ingrowths within the outermost-layer endosperm transfer cells were simply parallel and had long rib-like thickenings whereas wall ingrowths within the inner-layer endosperm transfer cells had evident branches. The wheat endosperm transfer cells were finally redifferentiated into aleurone cells and the starchy endosperm. (2) The wheat endosperm conducting cells could be transformed into the central starchy endosperm and provide space for the embryo growth via disintegration. (3) The embryo surrounding region nursed the young embryo, whereas endosperm transfer cells and endosperm conducting cells nursed the scutellar embryo after the embryo surrounding region disappeared. Thus, endosperm transport tissues could coordinate with one another to favor the development of filial sink tissues.
Published Version
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