A functional comparison of acclimation to shade and submergence in two terrestrial plant species.

Terrestrial plants experience multiple stresses when they are submerged, caused both by oxygen deficiency due to reduced gas diffusion in water, and by shade due to high turbidity of the floodwater. It has been suggested that responses to submergence are de facto responses to low light intensity. We investigated the extent to which submergence and shade induce similar acclimation responses by comparing two terrestrial Rumex species that differ in their responses to flooding. Our study confirms that there are strong similarities between acclimation responses to shade and submergence. Petiole length, specific leaf area (SLA), chlorophyll parameters and underwater light-compensation points changed at least qualitatively in the same direction. Maximum underwater photosynthesis rate, however, did discriminate between the functionality of the responses, as the acclimation to submergence appeared to be more effective than acclimation to shade at saturating light. We conclude that acclimation to submergence involves more than an increase in SLA to achieve the significant reduction of diffusion resistance for gas exchange between leaves and the water column.

[1]  L. Mommer,et al.  Acclimation of a terrestrial plant to submergence facilitates gas exchange under water , 2004 .

[2]  Rebecca A Montgomery,et al.  Adaptive radiation of photosynthetic physiology in the Hawaiian lobeliads: light regimes, static light responses, and whole-plant compensation points. , 2004, American journal of botany.

[3]  K. Sand‐Jensen,et al.  Growth rates and morphological adaptations of aquatic and terrestrial forms of amphibious Littorella uniflora (L.) Aschers. , 1997, Plant Ecology.

[4]  K. Sand‐Jensen,et al.  Regulation of photosynthetic rates of submerged rooted macrophytes , 1989, Oecologia.

[5]  L. Voesenek,et al.  PLANT HORMONES REGULATE FAST SHOOT ELONGATION UNDER WATER: FROM GENES TO COMMUNITIES , 2004 .

[6]  R. Pierik,et al.  Ethylene is required in tobacco to successfully compete with proximate neighbours , 2003 .

[7]  Frank F. Millenaar,et al.  Plant Movement. Submergence-Induced Petiole Elongation inRumex palustris Depends on Hyponastic Growth1 , 2003, Plant Physiology.

[8]  L. B. Jørgensen,et al.  Species specificity of resistance to oxygen diffusion in thin cuticular membranes from amphibious plants , 2003 .

[9]  M. Poulson,et al.  Morphological adaptations and photosynthetic rates of amphibious Veronica anagallis-aquatica L. (Scrophulariaceae) under different flow regimes , 2003 .

[10]  H. de Kroon,et al.  Extreme flooding events on the Rhine and the survival and distribution of riparian plant species , 2003 .

[11]  W. H. van der Putten,et al.  Plant responses to simultaneous stress of waterlogging and shade: amplified or hierarchical effects? , 2003, The New phytologist.

[12]  Stephen C. Maberly,et al.  Freshwater angiosperm carbon concentrating mechanisms: processes and patterns. , 2002, Functional plant biology : FPB.

[13]  F. Meinzer.  Functional convergence in plant responses to the environment , 2002, Oecologia.

[14]  W. Schmidt,et al.  Different pathways are involved in phosphate and iron stress-induced alterations of root epidermal cell development. , 2001, Plant physiology.

[15]  I. Terashima,et al.  Why are Sun Leaves Thicker than Shade Leaves? — Consideration based on Analyses of CO2 Diffusion in the Leaf , 2001, Journal of Plant Research.

[16]  M. Pigliucci,et al.  Adaptive phenotypic plasticity: the case of heterophylly in aquatic plants , 2000 .

[17]  L. Voesenek,et al.  Resistance to complete submergence in Rumex species with different life histories: the influence of plant size and light , 1999 .

[18]  C. Blom,et al.  Light acclimation, CO2 response and long‐term capacity of underwater photosynthesis in three terrestrial plant species , 1999 .

[19]  C. Blom.  Adaptations to Flooding Stress: From Plant Community to Molecule , 1999 .

[20]  L. Voesenek,et al.  Survival tactics of Ranunculus species in river floodplains , 1999, Oecologia.

[21]  Garry C. Whitelam,et al.  The shade avoidance syndrome: multiple responses mediated by multiple phytochromes , 1997 .

[22]  M. Jackson,et al.  Plant adaptations to anaerobic stress , 1997 .

[23]  Ichiro Terashima,et al.  Comparative ecophysiology of leaf and canopy photosynthesis , 1995 .

[24]  K. Sand‐Jensen,et al.  Comparative kinetics of photosynthesis in floating and submerged Potamogeton leaves , 1995 .

[25]  M. Jackson,et al.  Mechanisms of flood tolerance in plants , 1994 .

[26]  L. Voesenek,et al.  Physiological ecology of riverside species : adaptive responses of plants to submergence , 1994 .

[27]  D. Sims,et al.  Scaling sun and shade photosynthetic acclimation of Alocasia macrorrhiza to whole-plant performance – I. Carbon balance and allocation at different daily photon flux densities , 1994 .

[28]  D. Sims,et al.  Scaling sun and shade photosynthetic acclimation of Alocasia macrorrhiza to whole‐plant performance – II. Simulation of carbon balance and growth at different photon flux densities , 1994 .

[29]  M. Banga,et al.  Submergence-Induced Ethylene Synthesis, Entrapment, and Growth in Two Plant Species with Contrasting Flooding Resistances , 1993, Plant physiology.

[30]  S. L. Nielsen.  A comparison of aerial and submerged photosynthesis in some Danish amphibious plants , 1993 .

[31]  L. Voesenek,et al.  The role of flooding resistance in the establishment of Rumex seedlings in river flood plains , 1993 .

[32]  K. Sand‐Jensen,et al.  Photosynthetic use of inorganic carbon among primary and secondary water plants in streams , 1992 .

[33]  T. V. Madsen,et al.  Diurnal variation in light and carbon limitation of photosynthesis by two species of submerged freshwater macrophyte with a differential ability to use bicarbonate , 1991 .

[34]  M. Salvucci,et al.  Plasticity in the photosynthetic carbon metabolism of submersed aquatic macrophytes , 1989 .

[35]  W. J. Goldsborough,et al.  Light responses of a submersed macrophyte: implications for survival in turbid tidal waters. , 1988 .

[36]  Thomas J. Givnish,et al.  Adaptation to Sun and Shade: a Whole-Plant Perspective , 1988 .

[37]  Christopher B. Field,et al.  Plant Responses to Multiple Environmental FactorsPhysiological ecology provides tools for studying how interacting environmental resources control plant growth , 1987 .

[38]  R. Crawford,et al.  Aquatic plant photosynthesis: strategies that enhance carbon gain. , 1987 .

[39]  Patricia A. Chambers,et al.  Depth distribution and biomass of submersed aquatic macrophyte communities in relation to Secchi depth , 1985 .

[40]  J. Pokorný,et al.  Photosynthetic response to inorganic carbon in Elodea densa (Planchon) Caspary , 1985 .

[41]  P. Orr,et al.  Potentiometric measurements of carbon dioxide flux of submerged aquatic macrophytes in pH‐statted natural waters , 1983 .

[42]  D. Spence,et al.  THE DIFFERENTIAL ABILITY OF AQUATIC PLANTS TO UTILIZE THE INORGANIC CARBON SUPPLY IN FRESH WATERS , 1981 .

[43]  O. Björkman.  Responses to Different Quantum Flux Densities , 1981 .

[44]  Variation of photosynthesis in Elodea densa with pH and/or high CO2 concentrations , 1979 .

[45]  R. M. Campbell,et al.  Specific Leaf Areas and Zonation of Freshwater Macrophytes , 1973 .

[46]  D. Spence,et al.  PHOTOSYNTHESIS AND ZONATION OF FRESHWATER MACROPHYTES , 1970 .

[47]  J. Wintermans,et al.  Spectrophotometric characteristics of chlorophylls a and b and their phenophytins in ethanol , 1965 .