Development of pollen in cyperaceae, Biology

Development of Pollen in Cyperaceae

In all members of the Cyperaceae out of the four nuclei formed after meiosis, only one functions, the others degenerate. The functional nucleus remains in the centre and the three non-functional nuclei are pushed to a side. In Cyphers, Kyllinga, and Scirpus the non-functional nuclei are separated from the functional nucleus by a wall. Walls are also laid between the nonfunctional nuclei. The functional nucleus divides to form a vegetative cell and a generative cell.

1231_Development of Pollen in Cyperaceae.png

Development of Pollen in Cyperaceae

The non-functional nuclei may also begin to divide but the divisions are abortive, and they eventually degenerate. Thus in a tetrad, only one pollen grain is functional. This feature is similar to the behavior of megaspores in the development of monosporic embryo sac.

Posted Date: 1/23/2013 1:32:53 AM | Location : United States







Related Discussions:- Development of pollen in cyperaceae, Assignment Help, Ask Question on Development of pollen in cyperaceae, Get Answer, Expert's Help, Development of pollen in cyperaceae Discussions

Write discussion on Development of pollen in cyperaceae
Your posts are moderated
Related Questions
What is lamarckism? The Lamarckism is the theory that unites the law of use and disuse with the law of the transmission of acquired characteristics that is that asserted that a

How I can optimize shake flask culture?

How was it proved in the case of Amoeba that the key to the life of a cell is Nucleus?

Why in some cases is mitosis a synonym of reproduction? In some living beings asexual reproduction happens by many means: binary division, schizogony, budding, grafting, etc. I

Describe the Advantages and Disadvantages of insulin pump Advantages - Insulin pumps deliver more precise amounts of insulin. This supports control over blood sugar level,

PHYLUM ANNELIDA Definition  and Introduction Bilateral and  protosomial  eucoelomate  eumetazoans  whose  long   narrow and  wormlike body  is division  into  ring like  t

Light and Distribution We have mentioned in the beginning that the variation in the amount of light generally affects the global and local distribution of plants and animals. L


Q. What do you mean by hemodialysis? Hemodialysis is the artificial blood filtration made by specific machines in alternative of the kidneys. Hemodialysis may be necessary in p

WHAT ARE THE BRANCHES AND CONCEPT OF APPLIED BIOLOGY