Excerpt from Corn Breeding The pollen grain germinates soon after it becomes lodged on the exposed silk of the ear shoot. A pollen tube develops rapidly and enters the silk. It then grows down through the silk, and finally into the embryo sac, where the end is ruptured. The two sperms reach the embryo sac by means of the pollen tube. One' of the sperms unites with the egg, and the other unites with the two polar nuclei. The embryo or germ develops by repeated divisions of the fertilized egg, and the endosperm is produced ...
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Excerpt from Corn Breeding The pollen grain germinates soon after it becomes lodged on the exposed silk of the ear shoot. A pollen tube develops rapidly and enters the silk. It then grows down through the silk, and finally into the embryo sac, where the end is ruptured. The two sperms reach the embryo sac by means of the pollen tube. One' of the sperms unites with the egg, and the other unites with the two polar nuclei. The embryo or germ develops by repeated divisions of the fertilized egg, and the endosperm is produced by the division of the nucleus formed by the fusion of the second sperm with the two polar nuclei. The endosperm constitutes all of the kernel except the em bryo and the pericarp. The pericarp is developed from the ovary wall and is composed wholly of tissue of maternal origin. The different parts of the kernel are indicated diagrammatically in F igure 2. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
