Oecologia

, Volume 57, Issue 3, pp 344–351 | Cite as

Ecophysiology of two solar tracking desert winter annuals

III. Gas exchange responses to light, CO2 and VPD in relation to long-term drought
  • I. N. Forseth
  • J. R. Ehleringer
Original Papers

Summary

The gas exchange responses of potted, outdoor and greenhouse grown plants of the Sonoran Desert annuals Lupinus arizonicus (Wats.) and Malvastrum rotundifolium (Gray) were examined. Light saturation of leaf photosynthetic rates did not occur in either species at quantum flux densities exceeding 2.0 mmol m-2 s-1. Decreasing water potentials due to long-term drought did not alter this pattern of light response, though it did lower both photosynthetic rates and leaf conductances. Absolute maximum net photosynthetic rates exceeded 60 μmol m-2 s-1 and 50 μmol m-2 s-1 for M. rotundifolium and L. arizonicus, respectively. Both species showed a two level control of leaf conductance, responding to bulk leaf water potential and vapor pressure deficit. There were non-stomatal effects of drought upon photosynthesis in each species. Leaves of M. rotundifolium exhibited a constant stomatal, inhibition of approximately 19%, while in leaves of L. arizonicus stomatal inhibition ranged from 12–40% with decreasing leaf water potentials. These physiological data lend support to previous reports on the divergent water use patterns of these co-occurring species.

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References

  1. Aston MJ (1973) Changes in internal water status and the gas exchange of leaves in response to ambient evaporative demand. In: Plant Response to Climatic Factors. Statyer RO (ed) Paris: UNESCO, pp 243–247Google Scholar
  2. Beatley JC (1974) Phenological events and their environmental triggers in Mojave Desert ecosystems. Ecology 55:856–863Google Scholar
  3. Björkman O, Downton WJS, Mooney HA (1980) Response and adaptation to water stress in Nerium oleander. Carnegie Inst Wash YB 79:150–157Google Scholar
  4. Boyer JS (1971) Nonstomatal inhibition of photosynthesis in sunflower at low leaf water potentials and high light intensities. Plant Physiol 48:532–536Google Scholar
  5. Bunce JA, Chabot BF, Miller LN (1979) Role of annual leaf carbon balance in the distribution of plant species along an elevational gradient. Bot Gaz 140:288–294Google Scholar
  6. Collatz GJ (1977) Influence of certain environmental factors on photosynthesis and photorespiration in Simmondsia chinensis. Planta 134:127–132Google Scholar
  7. Ehleringer JR, Björkman O (1978) A comparison of photosynthetic characteristics of Encelia species possessing glabrous and pubescent leaves. Plant Physiol 62:185–190Google Scholar
  8. Ehleringer J, Forseth I (1980) Solar tracking by plants. Science 210:1094–1098Google Scholar
  9. Eheringer JR, Mooney HA, Berry JA (1979) Photosynthesis and microclimate of Camissonia claviformis, a desert winter annual. Ecology 60:280–286Google Scholar
  10. Farquher GD, Sharkey TD (1982) Stomatal conductance and photosynthesis. Ann Rev Plant Physiol 33:317–345Google Scholar
  11. Forseth I, Ehleringer JR (1980) Solar tracking response to drought in a desert annual. Oec 44:159–163Google Scholar
  12. Forseth IN, Ehleringer JR (1982a) Ecophysiology of two solar tracking desert winter annuals I. Photosynthetic acclimation to growth temperature. Aust J Plant Physiol 9:321–332Google Scholar
  13. Forseth IN, Ehleringer JR (1982b) Ecophysiology of two solar tracking desert winter annuals II. Leaf movements, water relations and microclimate. Oecologia (Berlin) 54:41–49Google Scholar
  14. Hall AE, Hoffman GJ (1976) Leaf conductance response to humidity and water transport in plants. Agron J 68:876–881Google Scholar
  15. Hall AE, Schulze E-D, Lange OL (1977) Current perspectives of steady-state stomatal responses to environment. In: Water and Plant Life, Lange OL, Kappen L, Schulze E-D (eds). Springer Verlag New York, pp 168–186Google Scholar
  16. Hall AE, Schulze E-D, (1980) Stomatal response to environment and a possible interrelation between stomatal effects on transpiration and CO2 assimilation. Plant Cell Env 3:467–474Google Scholar
  17. Hsiao TC (1973) Plant responses to water stress. Ann Rev Plant Physiol 24:519–570Google Scholar
  18. Lange OL, Lösch R, Schulze E-D, Kappen L (1971) Responses of stomata to changes in humidity. Planta 100:76–86Google Scholar
  19. Lange OL, Medina E (1979) Stomata of the CAM plant Tillandsia recurvata respond directly to humidity. Oecologia (Berlin) 40:357–363Google Scholar
  20. Lawlor DW (1976) Water stress induced changes in photosynthesis, photorespiration, respiration, and CO2 compensation concentration of wheat. Photosynthetica 10:378–387Google Scholar
  21. Lösch R (1979) Responses of stomata to invironmental factors-experiments with isolated epidermal strips of Polypodium vulgare. II. Leaf bulk water potential, air humidity, and temperature. Oecologia (Berlin) 39:229–238Google Scholar
  22. Lösch R, Tenhunen JD (1981) Stomatal responses to humidity-phenomenon and mechanism. In: Stomatal Physiology. Jarvis PG, Mansfield TA (eds) Cambridge University Press New York, pp 137–161Google Scholar
  23. Ludlow MM (1980) Adaptive significance of stomatal response to water stress. In: Adaptation of Plants to Water and High Temperature Stress. Turner NC, Kramer PJ (eds) John Wiley and Sons New York, pp 123–138Google Scholar
  24. Ludlow MM, Ibaroki K (1979) Stomatal control of water loss in Siratro (Macroptilium atropurpureum (DC) Urb.), a tropical pasture legume. Annals Bot 43:639–647Google Scholar
  25. Monson RK, Szarek SR (1979) Ecophysiological studies of Sonoran Desert plants. V. Photosynthetic adaptation of Machaeranthera gracilis, a winter annual. Oecologia (Berlin) 41:317–327Google Scholar
  26. Mooney HA, Ehleringer JR, Berry JA (1976) High photosynthetic capacity of a winter annual in Death Valley. Science 194:322–324Google Scholar
  27. Mooney HA, Björkman O, Collatz GJ (1977) Photosynthetic acclimation to temperature and water stress in the desert shrub, Larrea divaricata. Carnegie Inst Wash Yb 76:328–335Google Scholar
  28. Mooney HA, Ehleringer JR (1978) The carbon gain benefits of solar tracking in a desert annual. Plant Cell Env 1:307–311Google Scholar
  29. Mooney HA (1980) Seasonality and gradients in the study of stress adaptation. In: Adaptation of Plants to Water and High Temperature Stress. Turner NC, Kramer PJ (eds) John Wiley and Sons New York, pp 279–294Google Scholar
  30. Mulroy TW, Rundel PW (1977) Annual plants: Adaptations to desert environments. BioScience 27:109–114Google Scholar
  31. Odening WR, Strain BR, Oechel WC (1974) The effect of decreasing water potential on net CO2 exchange of intact desert shrubs. Ecology 55:1086–1095Google Scholar
  32. Osmond CB, Björkman O, Anderson DJ (1980) Physiological Processes in Plant Ecology. Toward a Synthesis with Atriplex. Ecological Studies 36 Springer-VerlagNew YorkGoogle Scholar
  33. Osonubi O, Davies WJ (1980) The influence of plant water stress on stomatal control of gas exchange at different levels of atmospheric humidity. Oecologia (Berlin) 46:1–6Google Scholar
  34. O'Toole JC, Ozbun JL, Wallace DH (1977) Photosynthetic response to water stress in Phaseolus vulgaris. Physiol Plant 40:111–114Google Scholar
  35. Pallardy SG, Kozlowski TT (1979) Stomatal response of Populus clones to light intensity and vapor pressure deficit. Plant Physiol 64:112–114Google Scholar
  36. Pavlik BM (1980) Patterns of water potential and photosynthesis of desert sand dune plants, Eureka Valley, California. Oecologia (Berlin) 46:147–154Google Scholar
  37. Plaut Z, Bravdo B (1973) Response of carbon dioxide fixation to water stress. Parallel measurements on isolated chloroplasts and intact spinach leaves. Plant Physiol 52:28–32Google Scholar
  38. Rawson HM, Begg JE, Woodward RG (1977) The effect of atmospheric humidity on photosynthesis, transpiration and water use efficiency of leaves. Planta 134:5–10Google Scholar
  39. Scholander PE, Hammel HT, Bradstreet ED, Hemmingsen EA (1965) Sap pressure in vascular plants. Science 148:339–346Google Scholar
  40. Schulze E-D, Lange OL, Buschbom U, Kappen L, Evenari M (1972) Stomatal responses to changes in humidity in plants growing in the desert. Planta 108:259–270Google Scholar
  41. Schulze E-D, Lange OL, Evenari M, Kappen L, Buschbom U (1975) The role of air humidity and temperature in controlling stomatal resistance of Prunus armeniaca under desert conditions. III. The effect, on water use efficiency. Oecologia (Berlin) 19:303–314Google Scholar
  42. Schulze E-D, Küppers M (1979) Short-term and long-term effects of plant water deficits on stomatal response to humidity in Corylus avellana L.. Planta 146:319–326Google Scholar
  43. Seemann JR, Downton WJS, Berry JA (1979) Field studies of acclimation to high temperature: Winter ephemerals in Death Valley. Carnegie Inst Wash Yb 78:157–162Google Scholar
  44. Seemann JR, Berry JA, Downton WJS (1980a) Seasonal changes in high-temperature acclimation of desert winter annuals. Carnegie Inst Wash YB 79:141–143Google Scholar
  45. Seemann JR, Field C, Berry JA (1980b) Photosynthetic capacity of desert winter annuals measured in situ. Carnegie Inst Wash Yb 79:146–147Google Scholar
  46. Sheriff DW (1977) The effect of humidity on water uptake by and viscous flow resistance of excised leaves of a number of species: Physiological and anatomical observations. J Exp Bot 28:1399–1407Google Scholar
  47. Szarek SR, Woodhouse RM (1976) Ecophysiological studies of Sonoran Desert plants. I. Diurnal photosynthesis patterns of Ambrosia deltoidea and Olneya tesota. Oecologia (Berlin) 26:225–234Google Scholar
  48. Szarek SR, Woodhouse RM (1978) Ecophysiological studies of Sonoran Desert plants. III. The daily course of photosynthesis for Acacia greggii and Cercidium microphyllum. Oecologia (Berlin) 35:285–294Google Scholar
  49. Tibbitts TW (1979) Humidity and plants. BioScience 29:358–363Google Scholar
  50. Wainwright CM (1977) Sun-tracking and related leaf movements in a desert lupine (Lupinus arizonicus). Amer J Bot 64:1032–1041Google Scholar
  51. Wallace CS, Szarek SR (1981) Ecophysiological studies of Sonoran Desert plants. VII. Photosynthetic gas exchange of winter ephemerals from sun and shade environments. Oecologia (Berlin) 51:57–61Google Scholar
  52. Wieland NK, Bazzaz FA (1975) Physiological ecology of three codominant successional annuals. Ecology 56:681–688Google Scholar
  53. Wong SC, Cowan IR, Farquhar GD (1979) Stomatal conductance correlates with photosynthetic capacity. Nature 282:424–426Google Scholar

Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • I. N. Forseth
    • 1
  • J. R. Ehleringer
    • 1
  1. 1.Department of BiologyUniversity of UtahSalt Lake CityUSA

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