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Wikipedia Evaluation

Sources

http://onlinelibrary.wiley.com/doi/10.1111/j.1399-3054.2008.01113.x/full

- Talks about how microspores change into haploid embryos

- Under contents add Microspore Embryogenesis as a title

-  Bateman, R.M.; Dimichele, W.A. (1994). "Heterospory - the most iterative key innovation in the evolutionary history of the plant kingdom.". Biological Reviews of the Cambridge Philosophical Society. 69: 315–417.

- Bidlack, James E.; Jansky, Shelley H. (2011). Stern's Introductory Plant Biology. New York, NY: McGraw-Hill. ISBN 0-07-304052-5.

- Evert, Ray (2013). Biology of Plants. 41 Madison Avenue New York, NY 10010: Peter Marshall. ISBN 978-1-4292-1961-7.

Microspore Embryogenesis

-Although it is not the usual route of a microspore, this process is the most effective way of yielding haploid and double haploid plants through the use of male sex hormones. Under certain stressors such as heat or starvation, plants select for microspore embryogenesis. It was found that over 250 different species of angiosperms responded this way. In the anther, after a microspore undergoes microsporogenesis, it can deviate towards embryogenesis and become star-like microspores. The microspore can then go one of four ways: Become an embryogenic microspore, undergo callogenesis to organogenesis (haploid/double haploid plant), become a pollen-like structure or die.

Morphology

- http://www.botany.unibe.ch/paleo/pollen_e/morphology.htm

- The microspore consists of three different walled layers. The outer layer is called the perispore, the next is the exospore, and the inner layer is the endospore. The perispore is the thickest of the three layers while the exospore and endospore are relatively equal in width.

Microspore Article