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Evolution of the Endosperm in Proteaceae

C. Venkata Rao
The New Phytologist
Vol. 66, No. 4 (Oct., 1967), pp. 755-768
Published by: Wiley on behalf of the New Phytologist Trust
Stable URL: http://www.jstor.org/stable/2430463
Page Count: 14
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Evolution of the Endosperm in Proteaceae
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Abstract

The endosperm development in several genera of both sub-families of Proteaceae is studied. The scanty nuclear endosperm and large persistent nucellus (perisperm) seem to represent the most primitive conditions. The general absence of endosperm haustoria in Proteoideae and their universal occurrence in Grevilleoideae are attributed to the different methods of the post-fertilization growth of their ovules. The probable factors which led to the origin of the endosperm haustorium in Grevilleoideae are suggested and the trends in its evolution are outlined.

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