Submergence‐induced leaf acclimation in terrestrial species varying in flooding tolerance
- 20 July 2007
- journal article
- research article
- Published by Wiley in New Phytologist
- Vol. 176 (2), 337-345
- https://doi.org/10.1111/j.1469-8137.2007.02166.x
Abstract
Earlier work on the submergence-tolerant species Rumex palustris revealed that leaf anatomical and morphological changes induced by submergence enhance underwater gas exchange considerably. Here, the hypothesis is tested that these plastic responses are typical properties of submergence-tolerant species. Submergence-induced plasticity in leaf mass area (LMA) and leaf, cell wall and cuticle thickness was investigated in nine plant species differing considerably in tolerance to complete submergence. The functionality of the responses for underwater gas exchange was evaluated by recording oxygen partial pressures inside the petioles when plants were submerged. Acclimation to submergence resulted in a decrease in all leaf parameters, including cuticle thickness, in all species irrespective of flooding tolerance. Consequently, internal oxygen partial pressures (pO(2)) increased significantly in all species until values were close to air saturation. Only in nonacclimated leaves in darkness did intolerant species have a significantly lower pO(2) than tolerant species. These results suggest that submergence-induced leaf plasticity, albeit a prerequisite for underwater survival, does not discriminate tolerant from intolerant species. It is hypothesized that these plastic leaf responses may be induced in all species by several signals present during submergence; for example, low LMA may be a response to low photosynthate concentrations and a thin cuticle may be a response to high relative humidity.Keywords
This publication has 39 references indexed in Scilit:
- How plants cope with complete submergenceNew Phytologist, 2006
- Submergence-Induced Morphological, Anatomical, and Biochemical Responses in a Terrestrial Species Affect Gas Diffusion Resistance and Photosynthetic PerformancePlant Physiology, 2005
- A functional comparison of acclimation to shade and submergence in two terrestrial plant speciesNew Phytologist, 2005
- Leaf optical responses to light and soil nutrient availability in temperate deciduous treesAmerican Journal of Botany, 2005
- Species specificity of resistance to oxygen diffusion in thin cuticular membranes from amphibious plantsPlant, Cell & Environment, 2003
- Long‐distance transport of gases in plants: a perspective on internal aeration and radial oxygen loss from rootsPlant, Cell & Environment, 2003
- Formation of Aerenchyma and the Processes of Plant Ventilation in Relation to Soil Flooding and SubmergencePlant Biology, 1999
- Photosynthesis of amphibious and obligately submerged plants in CO 2 -rich lowland streamsOecologia, 1998
- Elongation by primary lateral roots and adventitious roots during conditions of hypoxia and high ethylene concentrationsPlant, Cell & Environment, 1997
- Leaf developmental plasticity of Ranunculus flabellaris in response to terrestrial and submerged environmentsCanadian Journal of Botany, 1996