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

@article{Nowak1997PhysiologicalAA,
  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},
  year={1997},
  volume={158},
  pages={818 - 826}
}
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… Expand
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Physiological responses of the CAM epiphyte Tillandsia usneoides L. (Bromeliaceae) to variations in light and water supply.
TLDR
Examining the strategies employed by epiphytes such as T. usneodies to tolerate extreme light and water regimes has demonstrated the importance of physiological mechanisms that allow flexible carboxylation capacity and continued carbon cycling to maintain photosynthetic integrity. Expand
Hydraulic conductance, resistance, and resilience: how leaves of a tropical epiphyte respond to drought
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Low values for all conductances during drying, particularly in pathways outside the xylem, lead to hydraulic resilience for this species and may also contribute to its broad environmental tolerances. Expand
Drought effects on resource partition and conservation among leaf ontogenetic stages in epiphytic tank bromeliads.
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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. Expand
Hot but Not Dry: Modest Changes in Water Relations for an Epiphytic Bromeliad in a Tropical Dry Deciduous Forest
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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. Expand
Morphophysiological Plasticity in Epiphytic Bromeliads Across a Precipitation Gradient in the Yucatan Peninsula, Mexico
TLDR
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. Expand
Parenchyma-chlorenchyma water movement during drought for the hemiepiphytic cactus Hylocereus undatus.
  • P. Nobel
  • Biology, Medicine
  • Annals of botany
  • 2006
TLDR
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. Expand
Does shading explain variation in morphophysiological traits of tropical epiphytic orchids grown in artificial conditions?
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The results indicate that C3 epiphytic orchids Miltonia flavescens and Miltonia spectabilis var. Expand
Water and nutrient uptake capacity of leaf-absorbing trichomes vs. roots in epiphytic tank bromeliads
Abstract The water and nutrient uptake mechanisms used by vascular epiphytes have been the subject of a few studies. While leaf absorbing trichomes (LATs) are the main organ involved in resource… Expand
Mycorrhization and phosphorus nutrition affect water relations and CAM induction by drought in seedlings of Clusia minor.
TLDR
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. Expand
Causes and consequences of high osmotic potentials in epiphytic higher plants.
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It is argued that such high osmotic potentials, indicative of low solute concentrations, are the result of environmental constraints of the epiphytic habitat on productivity of these plants, and that low rates of photosynthesis and transpiration delay the onset of turgor loss in the tissues ofEpiphytes such that they appear to be very drought-stress tolerant. Expand
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References

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