Physiological and Anatomical Responses to Water Deficits in the Cam Epiphyte Tillandsia ionantha (Bromeliaceae)

  title={Physiological and Anatomical Responses to Water Deficits in the Cam Epiphyte Tillandsia ionantha (Bromeliaceae)},
  author={Edwin J. Nowak and Craig Edwin Martin},
  journal={International Journal of Plant Sciences},
  pages={818 - 826}
  • E. Nowak, C. Martin
  • Published 1 November 1997
  • Environmental Science
  • International Journal of Plant Sciences
Although physiological responses to drought have been examined in several species of epiphytic bromeliads, few have included a comprehensive methodological approach to the study of the carbon and water relations of a single species undergoing drought stress. Thus, physiological and anatomical responses to an imposed drought treatment were examined in the atmospheric Crassulacean acid metabolism (CAM) epiphyte Tillandsia ionantha. From 0 through 20 d without water, nocturnal malic acid… 

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Drought effects on resource partition and conservation among leaf ontogenetic stages in epiphytic tank bromeliads.

This study advances the understanding of the resistance of bromeliads faced with increasing drought stress and paves the way for in-depth reflection on their strategies to cope with water shortage.

Hot but Not Dry: Modest Changes in Water Relations for an Epiphytic Bromeliad in a Tropical Dry Deciduous Forest

Individuals of T. brachycaulos displayed modest leaf physiological responses to the strong seasonal environmental changes within the canopy of this tropical forest, in agreement with the observation that when water is available, it has high water potential, and thus water storage is the main strategy for surviving in such extreme conditions.

Morphophysiological Plasticity in Epiphytic Bromeliads Across a Precipitation Gradient in the Yucatan Peninsula, Mexico

Higher plasticity in water use traits in atmospheric species, compared to tanks and higher Plasticity in general in species with wide distribution compared to those with small distribution ranges is found.

Parenchyma-chlorenchyma water movement during drought for the hemiepiphytic cactus Hylocereus undatus.

  • P. Nobel
  • Environmental Science
    Annals of botany
  • 2006
The ability to shift water from the parenchyma to the chlorenchyma allowed the latter tissue to maintain a positive net CO2 uptake rate during such a drought.

Does shading explain variation in morphophysiological traits of tropical epiphytic orchids grown in artificial conditions?

The results indicate that C3 epiphytic orchids Miltonia flavescens and Miltonia spectabilis var.

Mycorrhization and phosphorus nutrition affect water relations and CAM induction by drought in seedlings of Clusia minor.

P deficiency promoted the induction of CAM by drought in Nat seedlings, whereas P fertilization and mycorrhization did not, indicating that P and N deficiencies are promoters of CAM in droughted plants of C. minor.

Causes and consequences of high osmotic potentials in epiphytic higher plants.



The Vegetative Morphology, Habitat Preference and Water Balance Mechanisms of the Bromeliad Tillandsia ionantha Planch

Adaptations which permit this plant to succeed in dry, exposed habitats are a capacity for water uptake through foliar trichomes, the capacity to resist rapid drying at low humidities, and the ability to endure extreme desiccation without incurring irreversible impairment of its metabolism.

Unusual Water Relations in the CAM Atmospheric Epiphyte Tillandsia usneoides L. (Bromeliaceae)

It is hypothesized that the unusual nature of the water relations of T. usneoides is attributable to the interactions between two "pools" of water and the external atmosphere, and the dense indumentum of trichomes obscuring the surface of this epiphyte comprises one pool and is most likely responsible for rapid hydrationEarly in the night and dehydration early in the day.

Leaf Anatomy and CO2 Recycling during Crassulacean Acid Metabolism in Twelve Epiphytic Species of Tillandsia (Bromeliaceae)

Results of this study do not support the hypothesis that CO2 recycling during CAM may reflect respiratory contributions of CO2 from the tissue hydrenchyma.

Comparative ecophysiology of CAM and C3 bromeliads. IV. Plant water relations

Overall, leaf water relations and gas exchange in the bromeliads were strongly affected both by short-term changes in water availability and by longer-term climatic differences in the various regions of the island.

Carbon balance during CAM: an assessment of respiratory CO2 recycling in the epiphytic bromeliads Aechmea nudicaulis and Aechmea fendleri

It is indicated that CAM as a CO2 concentrating mechanism regulates both water-use efficiency and plant carbon balance in these epiphytes, in response to PAR and night temperature.

Diel Patterns of Water Potential Components for the Crassulacean Acid Metabolism Plant Opuntia ficus-indica when Well-Watered or Droughted.

Under well-watered conditions, chlorenchyma acidity in cladodes of Opuntia ficus-indica increased substantially at night, fully accounting for the 0.26-megapascal nocturnal increase in osmotic pressure in the outer 2 millimeters, in agreement with predictions based on electric-circuit analog models for Crassulacean acid metabolism plants.

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It appears that recycling of respired CO2 by CAM bromeliads and efficient use of water in all phases of CO2 uptake are physiological adaptations of bromliads to arid microclimates in the humid tropics.

Response of the Succulent Leaves of Peperomia magnoliaefolia to Dehydration: Water Relations and Solute Movement in Chlorenchyma and Hydrenchyma.

The observed volume preservation of the chlorenchyma stabilized photosynthesis of Peperomia magnoliaefolia (Jac) leaves, which was less inhibited by a given decrease of the relative water content of the whole leaves than in nonsucculent leaves.

Differences in water relations parameters for the chlorenchyma and the parenchyma of Opuntia ficus-indica under wet versus dry conditions

Polymerisation of sugars, large elastic cells in the water-storage parenchyma and mucilage with its high water-holding capacity helped maintain a positive turgor in the photosynthetic tissue, even after 4 months of drought.

Seasonal Patterns of Acid Metabolism and Gas Exchange in Opuntia basilaris.

The rapid response to a midsummer rainfall emphasizes the importance of plant water potential as a parameter controlling over-all metabolic activity and significantly influenced the efficiency of water use and carbon dioxide assimilation.