In plant morphogenesis

Fig. 3. The patterning-growth feedback involved in plant morphogenesis Growth affects the types of chemical patterns which form if the patterns are of growth catalysts, the pattern in turn affects growth. 

Grieneisen, V. A. Scheres, B. (2009). Back to the future evolution of computational models in plant morphogenesis. Current Opinion in Plant Biology, Vol.12, pp. 606-614. 

Holloway, D.M (2010). The role of chemical dynamics in plant morphogenesis. Biochemical Society Transactions, Vol. 38, pp. 645-650. 

In this chapter we first discuss the experimental evidence that led us to evolve new concepts of the role of auxin in plant morphogenesis. Some of the evidence has already been published in a series of technical papers (Zajj cz-KOWSKI and Wodzicki 1978a, Wodzicki et al. 1979, Wodzicki and Wodzicki 1981, Zakrzewski 1983). An outline of the proposed model of regulation of morphogenesis by auxin has also been published previously (Zaj> czkowski and Wodzicki 1978 b, Zaj> czkowski etal. 1983). Some of the theoretical and experimental aspects of the model have been presented and discussed at several meetings and conferences (Zaj czkowski and Wodzicki 1978 c, 1980, Wodzicki 1980a, b, Zaj czkowski 1980). However, some previously unpublished material is included here. 

Zhong, R., Burk, D.H., Naim, C.J., Wood-Jones, A., Morrison, W.H. and Ye, Z-H., 2005, Mutation of SAC1, an Arabidopsis SAC domain phosphoinositide phosphatase, causes alterations in cell morphogenesis, cell wall synthesis, and actin organization. Plant Cell 17 1449-1466. 

Sucrose is a key carbohydrate in plant metaholism. The concentration of. sucrose in space and time is an important parameter in plant growth and morphogenesis, which can be determined by spatially resolved NMR [Metl, TselJ. The sucrose distribution, for example, has been examined quantitatively in Ricinus communis seedlings Metl ]. Until now, information on the sucrose concentration in the phloem has been obtained only by several destructive methods. They all require the opening of the sieve tubes, which in turn may modify the water flow in the plant, so that it cannot be knowm whether or not... 

Brassinosteroids are a family of hormones found in plants in which they are potent growth-promoters (reviews I, 2). Ecdysteroids on the other hand are a group of hormones occurring in all phyla of protostomian animals. In arthropods they are involved in the control of growth, morphogenesis, and reproduction (reviews 3, 4). While brassinosteroids have been detected in plants only, ecdyster-... 

Mathur, J., and M. Hulskamp. 2002. Microtubules and microfilaments in cell morphogenesis in higher plants. Curr. Biol. 12 R669-R676. 

Thus it is clear that pectic polysaccharides isolated from plant cell walls are a family of complex macromolecules. Recent work by Albersheim and associates suggests that the pectic polymers may not serve solely as structural polymers. Fragments of pectic polymers have been implicated in host-pathogen interactions (Darvill and Albersheim, 1984) and plant morphogenesis (Tran Thanh Van et al., 1985). Thus these polysaccharides still provide considerable challenges to both chemists, biochemists, and physiologists in determining their structures and functions. 

Wardlaw, C.W A commentary on Turing s diffusion-reaction theory of morphogenesis. New Phytol. 52(1), 40-47 (1953). http //www.jstor.org/stable/2429242 Wardlaw, C.W The chemical concept of organization in plants. New Phytol. 54(3), 302-310 (1955). http //www.jstor.org/stable/2429313... 

Substantial progress towards understanding at least some developmental processes in animals has been made by working with species (model systems) that are often of no direct economic import. To date, the use of model systems for plants has been less popular. However, for the study of plant morphogenesis and/or plant cell differentiation, the moss, PhyscomitreUa patens, offers many advantageous traits. These include ... 

These data support the hypothesis that cytokinin exerts at least part of its effect by stimulating Ca uptake by responsive cells. It can be hypothesized that the polarized response of cytoplasmic rearrangement and asymmetrical division that occurs in Funaria caulonema cells after cytokinin treatment is a result of localized cytokinin binding to the distal end of these cells. This may have direct results on specific ion channels leading to a spatially controlled change in intracellular Ca. Localization of receptors may be a general mechanism to establish subcellular positional information, which is essential for plant morphogenesis. 

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