Development of the Macrogametophyte and Embryo of Daucus carota

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Abstract
The archesporial cells function directly as macrospore mother cells. The macro-gametophyte, which arises from the chalazal macro-spore, is of the 7-celled type. For tracing the structure and course of the pollen tubes, slides were stained with resorcin blue and mounted in Apathy''s medium. The tubes were found to grow intercellularly through the conducting tissue of the style to its base and then superficially along a groove leading to a canal communicating with each locule. The embryo develops into a filamentous structure 8 or more cells long before longitudinal divisions occur. Of these 8 cells the 3 farthest from the micropyle give rise to all of the embryo except the root tip. The other 5 form the root tip and suspensor.

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