| Autor: |
Sundara Rajan, S., Shivaramaiah, G., Sathyananda, N. |
| Zdroj: |
Proceedings of the Indian Academy of Sciences. Section B, Plant Sciences; Nov1976, Vol. 84 Issue 5, p180-184, 5p |
| Abstrakt: |
Embryo sac development conforms to Polygonum type. Starch grains are noticed in the embryo sac right from the megaspore mother cell stage. Twin tetrads one with a chalazal functional megaspore and another with a micropylar functional megaspore have been noticed in some ovules. While 75% of the embryo sacs have normal polarity, in 20% of the ovules reverse polarity has been noticed. In the remaining 5% of the ovules, 'bipolarity' has been observed. Reverse polarity in relation to double archegoniate theory has been discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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