Ovule development in seeded and seedless grapes
DOI:
https://doi.org/10.5073/vitis.1970.9.7-14Abstract
Female gametophyte and early embryo and endosperm development were examined in 3 seedless grape varieties, Himrod, Interlaken Seedless and N. Y. 15302, and in their seeded parent Ontario.- A high proportion of functional embryo sacs was found at full bloom in all varieties.
- Fertilization occurred in all varieties.
- Precocious initiation of endosperm was observed with Himrod and extremely rapid development of endosperm was found with N. Y. 15302.
- Early degeneration of zygotes, failure of the zygotes to divide, and endosperm degeneration were observed in the seedless varieties with smallest seed remnants, Himrod and Interlaken Seedless.
- Imperfect development of the zygote and endosperm resulted in seed abortion (stenospermy) and seedless fruit (stenospermocarpy) in Himrod and Interlaken Seedless varieties.
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