Plant Development, Volume 91 (Current Topics in Developmental Biology)

Plant Development, Volume 91 (Current Topics in Developmental Biology)

Language: English

Pages: 480

ISBN: 012380910X

Format: PDF / Kindle (mobi) / ePub

A subgroup of homeobox genes, which play an important role in the developmental processes of a variety of multicellular organisms, Hox genes have been shown to play a critical role in vertebrate pattern formation. Hox genes can be thought of as general purpose control genes―that is, they are similar in many organisms and direct the same processes in a variety of organisms, from mouse, to fly, to human.

* Provides researchers an overview and synthesis of the latest research findings and contemporary thought in the area

* Inclusion of chapters that discuss the evolutionary development of a wide variety of organisms

* Gives researchers and clinicians insight into how defective Hox genes trigger developmental abnormalities in embryos



















Alternatively, the concentration of factors that restrict lateral growth (such as ENTIRE, discussed below) could also affect the refinement of the response peak. Low expression of such factors might result in increased sensitivity to auxin, therefore causing growth over a broader region. 5.3. Duration of auxin maximum formation Somewhat related to the refinement of auxin peaks, the maintenance of the auxin peak might also influence the development of distinct leaflets. Once the auxin sink is

Arabidopsis thaliana. Science 323, 1485–1488. Benkova, E., Michniewicz, M., Sauer, M., Teichmann, T., Seifertova, D., Jürgens, G., and Friml, J. (2003). Local, efflux-dependent auxin gradients as a common module for plant organ formation. Cell 115, 591–602. Berger, F., Grini, P. E., and Schnittger, A. (2006). Endosperm: an integrator of seed growth and development. Curr. Opin. Plant Biol. 9, 664–670. Bergmann, D. C., Lukowitz, W., and Somerville, C. R. (2004). Stomatal development and pattern

al. (2001) Inhibition of petiole growth Promotion of petiole growth Stem and internode elongation Root development Root greening Fresh weight accumulation UV-A and blue cry1 High-C Jackson and Jenkins (1995) Red Far-red phyB phyA, B phyC phyD phyE phyB LD SD Wc SD SD EOD Reed et al. (1993) Devlin et al. (1996) Monte et al. (2003) Devlin et al. (1999) Devlin et al. (1998) Nagatani et al. (1991) Far-red phyD phyE phyB EOD EOD R:FR ratio Devlin et al. (1999) Devlin et al. (1998)

and ACR4 proteins in the root cap. (See Color Insert.) the RC, they are responsible for outward lateral transport of auxin, whilst in the MZ, they are responsible for inward lateral transport of auxin (Blilou et al., 2005). PIN4, which has a more specialized role, is expressed around and localized toward the QC and contributes to the concentration of auxin in the QC (Friml et al., 2002). Computer modeling shows that this network is, in principle, able to maintain auxin distribution in the

a smaller MZ, a phenotype which can be suppressed by mutation of multiple DELLA genes (Achard et al., 2009; Ubeda-Tomás et al., 2009). Furthermore, expression of a GA-resistant version of the DELLA protein GAI (gai) in the root meristem causes a large reduction in MZ size (Ubeda-Tomás et al., 2009). A similar effect can be observed if gai is expressed in the endodermis alone, but not in other tissue layers, suggesting that GA response in the root meristem is only required in the endodermis

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