An Integrated System of Classification of Flowering Plants by Arthur Cronquist PDF

By Arthur Cronquist

ISBN-10: 0231038801

ISBN-13: 9780231038805

-- Natural History

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CRANE. 1997. The Origin and Early Diversification of Land Plants: A Cladistic Study. Smithsonian Institution Press, Washington, DC. , R. STELZER , S. HOLZAMER , U. KUNZ, and M. GIERTH. 2000. Analytical electron microscopical investigations on the apoplastic pathways of lanthanum transport in barley roots. Planta 211, 816–822. LEVY, Y. , S. MESNAGE, J. S. MYLNE, A. R. GENDALL , and C. DEAN. 2002. Multiple roles of Arabidopsis VRN1 in vernalization and flowering time control. Science 297, 243–246.

The primary role of the S phase is to make sure chromosome replication is complete and to allow for repair of damaged DNA. The microtubules of the preprophase band, a ring-like band of microtubules that borders the plasma membrane and encircles the nucleus in a plane corresponding to the plane of cell division, also develop during the G2 phase (Chapter 4; Gunning and Sammut, 1990). During mitosis the genetic material synthesized during the S phase is divided equally between two daughter nuclei, restoring the 2C DNA value.

1). Nuclear envelope Nucleoplasm Chromatin Nucleolus Plasma membrane Cytosol (cytoplasmic ground substance, hyaloplasm) Organelles bounded by two membranes: Plastids Mitochondria Organelles bounded by one membrane: Peroxisomes Vacuoles, bounded by tonoplast Ribosomes Endomembrane system (major components): Endoplasmic reticulum Golgi apparatus Vesicles Cytoskeleton: Microtubules Actin filaments In this chapter only the plasma membrane, nucleus, and cytoplasmic organelles are considered. The remaining components of the protoplast are covered in Chapter 3.

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An Integrated System of Classification of Flowering Plants by Arthur Cronquist


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