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Ecophysiology of Crassulacean Acid Metabolism (CAM)

Luttge, U

Annals of botany, 2004-06, Vol.93 (6), p.629-652 [Periódico revisado por pares]

England: Oxford University Press

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  • Título:
    Ecophysiology of Crassulacean Acid Metabolism (CAM)
  • Autor: Luttge, U
  • Assuntos: Cactus ; carbon dioxide ; Carbon Dioxide - metabolism ; Crassulaceae - genetics ; Crassulaceae - metabolism ; Crassulacean acid metabolism ; Ecophysiology ; Ecosystem ; ecosystems ; environmental factors ; Epiphytes ; Evolution ; habitats ; INVITED REVIEW ; Invited Reviews ; Key words: CAM ; Leaves ; Light ; literature reviews ; nutrient requirements ; phenotype ; Plant cells ; plant communities ; Plant Physiological Phenomena ; Plant physiology ; plant stress ; Plants ; Plants - genetics ; Plants - metabolism ; salinity ; stress tolerance ; Succulent plants ; Temperature ; Water ; water uptake
  • É parte de: Annals of botany, 2004-06, Vol.93 (6), p.629-652
  • Notas: Received: 3 October 2003; Returned for revision: 17 December 2003; Accepted: 20 January 2004
    istex:F66278FA5405173F8659E5738A0D15083D6181D3
    For correspondence. E‐mail: luettge@bio.tu‐darmstadt.de
    ark:/67375/HXZ-RX8ZLMZZ-D
    local:mch087
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-3
    ObjectType-Review-1
  • Descrição: Background and Scope: Crassulacean Acid Metabolism (CAM) as an ecophysiological modification of photosynthetic carbon acquisition has been reviewed extensively before. Cell biology, enzymology and the flow of carbon along various pathways and through various cellular compartments have been well documented and discussed. The present attempt at reviewing CAM once again tries to use a different approach, considering a wide range of inputs, receivers and outputs. Input: Input is given by a network of environmental parameters. Six major ones, CO2, H2O, light, temperature, nutrients and salinity, are considered in detail, which allows discussion of the effects of these factors, and combinations thereof, at the individual plant level ('physiological aut-ecology'). Receivers: Receivers of the environmental cues are the plant types genotypes and phenotypes, the latter including morphotypes and physiotypes. CAM genotypes largely remain'black boxes', and research endeavours of genomics, producing mutants and following molecular phylogeny, are just beginning. There is no special development of CAM morphotypes except for a strong tendency for leaf or stem succulence with large cells with big vacuoles and often, but not always, special water storage tissues. Various CAM physiotypes with differing degrees of CAM expression are well characterized. Output: Output is the shaping of habitats, ecosystems and communities by CAM. A number of systems are briefly surveyed, namely aquatic systems, deserts, salinas, savannas, restingas, various types of forests, inselbergs and paramos. Conclusions: While quantitative census data for CAM diversity and biomass are largely missing, intuition suggests that the larger CAM domains are those systems which are governed by a network of interacting stress factors requiring versatile responses and not systems where a single stress factor strongly prevails. CAM is noted to be a strategy for variable, flexible and plastic niche occupation rather than lush productivity. 'Physiological syn-ecology' reveals that phenotypic plasticity constitutes the ecophysiological advantage of CAM.
  • Editor: England: Oxford University Press
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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