tube nucleus
noun Date: 1939 the one of the two nuclei formed by mitotic division of a microspore during the formation of a pollen grain that is held to control subsequent growth of the pollen tube and that does not divide again — compare generative nucleus

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • tube nucleus — tube nucleus. См. ядро пыльцевой трубки. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • tube nucleus —   Nucleus of the pollen tube cytoplasm …   Expanded glossary of Cycad terms

  • tube nucleus — noun : the one of the two nuclei formed by mitotic division of a microspore during the formation of a pollen grain that is held to control subsequent growth of the pollen tube and that does not divide again compare generative nucleus …   Useful english dictionary

  • Tube Alloys — was the code name for the British nuclear weapon directorate during World War II, when the very possibility of nuclear weapons was kept at such a high level of secrecy that it had to be referred to by code even in the highest circles of… …   Wikipedia

  • tube cell — noun 1. : one of the two cells that is produced by division of the microspore nucleus in the development of the male gametophyte in higher plants and that functions in development of the pollen tube 2. : any of the cells in a wheat grain having… …   Useful english dictionary

  • nucleus — A dense protoplasmic membrane bound region of a eukaryotic cell that contains the chromosomes, separated from the cytoplasm by a membrane; present in all eukaryotic cells except mature sieve tube elements and red blood cells …   Glossary of Biotechnology

  • generative nucleus — noun Date: circa 1892 the one of the two nuclei resulting from the first division in the pollen grain of a seed plant that gives rise to sperm nuclei compare tube nucleus …   New Collegiate Dictionary

  • generative nucleus — noun : the one of the two nuclei resulting from the first division in the pollen grain of a seed plant that gives rise to sperm nuclei see generative cell; compare tube nucleus …   Useful english dictionary

  • Sieve tube element — in the plant, sieve elements are living cells. They are thick and circular and can be different colours.At the interface between two sieve tube members in angiosperms are sieve plates, pores in the plant cell walls that facilitate the movement of …   Wikipedia

  • Crookes tube — A Crookes tube. The electrons travel in straight lines from the cathode on the left, shown by the shadow cast by the cross on the fluorescence on the righthand wall. The anode is at the bottom. A Crookes tube is an early experimental electrical… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”