Effect of Water Stress on Photosynthesis, Respiration, and Transpiration of Four <i>Abies</i> Species

Puritch, George S.

doi:10.1139/x73-040

Cited by 37 publications

(17 citation statements)

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“…Fc was reduced at low ip at all values of C, (Figs, 2 and 3), The data were wholly consistent with a twophase response and the fitting of an exponential curve appeared appropriate. Similar patterns have now been observed in a range of crop species (Brix 1962, Boyer 1970, Beadle et al 1973, in C3 woody species (Larcher 1969) and some other conifers (Puriteh 1973), though not in some species of Pinus where F^ fell towards zero with no observable plateau (Brix 1962, Dykstra 1974, There was no evidence of a four-phase response to ip which had been noted earlier in some species of Abies (Puriteh 1973), The narrow range oftp.^ over which zero F^ was observed for each CP was similar to that for g^ (Beadle etal. 1979), As a result F5 was always higher at high C^ than at low C,, in Sitka spruce.…”

Section: Discussionsupporting

confidence: 74%

Photosynthesis as related to xylem water potential and carbon dioxide concentration in Sitka spruce

Beadle

Neilson

Jarvis

et al. 1981

Physiologia Plantarum

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Current‐year shoots of Sitka spruce (Picea sitchensis (Bong.) Carr.) were removed from the forest canopy. After steady‐state rates of net photosynthesis were obtained in a leaf chamber, the shoots were excised in air and removed at different times to establish a relationship between net photosynthesis and xylem water potential. The experiment was repeated at five ambient carbon dioxide concentrations. Net photosynthesis remained constant over a wide range of xylem water potential and increased linearly with ambient carbon dioxide concentration between 20 and 300 cm3 m−3. At low water potential net photosynthesis declined at each ambient carbon dioxide concentration and there was little difference in the potential (±0.05 MPa) at which zero photosynthesis was observed. There was a small increase in the CO2 compensation concentration at low xylem water potentials, but calculated mesophyll conductance still declined at low water potential after correction for this change in compensation concentration. Mesophyll conductance reached zero within the same range of water potential as net photosynthesis. The results suggested that the non‐stomatal contribution to the decline of photosynthesis was approximately 30% until almost complete stomatal closure occurred.

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Section: Discussionsupporting

confidence: 74%

Photosynthesis as related to xylem water potential and carbon dioxide concentration in Sitka spruce

Beadle

Neilson

Jarvis

et al. 1981

Physiologia Plantarum

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“…Measurements of water potential of subalpine fir throughout its elevafion range at a site adjacent to Klahhane Ridge, showed predawn readings on 1 November 1993, between -0.8 and -1.0 MPa; mid-afternoon readings approached -1.5 MPa (A. Woodward, Cooperative Park Studies Unit, Seattle, WA, unpublished data). Puritch (1973) determined that subalpine fir is able to maintain maximal transpiration down to -1.0 MPa and 60% of maximal photosynthesis to -1,4 MPa. There-fore, warm November temperatures may allow subalpine fir to maintain posiHve net photosynthesis on low-and middle-elevation sites.…”

Section: Discussionmentioning

confidence: 99%

Growth response of subalpine fir (Abies lasiocarpa) to climate in the Olympic Mountains, Washington, USA

Ettl

Peterson

1995

Global Change Biology

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Growth response of subalpine fir {Abies lasiocarpa) to climate was studied across its local geographical and elevation range in the Olympic Mountains, Washington. A dendroecological analysis of subalpine fir across a range of elevations (1350-1850 m) and annual precipitation (125-350 cm y"^), was used to compare environmental factors affecting growth. Climate-growth relationships were explored using Pearson productmoment correlation coefficients; partial correlation analysis was used to assess relationships among site chronologies and climatic variables. Radial growth is negatively correlated with winter precipitation at high elevation and wet sites, but not at low and middle elevation dry sites. Growth is positively correlated with current growing season temperature at all sites; however, growth is negatively correlated with previous year August temperature, indicating that climate affects growth in subsequent years. Positive correlations between growth and summer precipitation during the growing season at low and middle elevation dry sites suggest that soil moisture is partially limiting to growth on these sites. If the climate of the Pacific Northwest becomes warmer and drier, then subalpine fir growth may increase at high elevation and wet sites, but may decrease at lower elevation dry sites in the Olympic Mountains. However, the growth response of subalpine fir to potentially rapid climate change will not be uniform because subalpine fir grows over a wide range of topographic features, habitats, and local climates at different geographical scales. A comparison of growth response to current growing season temperature suggests that the temperature-related growth response of subalpine fir is not adequately described by the parabolic curve used in JABOWAbased models.

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“…The stomata of four species of Abies (Puritch 1973) and two ecotypes of Douglas fir (Zavitkovski and Ferrell 1970) have been shown to respond to y/ with the same characteristic as Sitka spruce, though this may not be a feature of all conifers. Some evidence suggests that Pinus gtomata are more sensitive to mild water stress (Rutter and Sands 1958, Jarvis and Jarvis 1963, Lopushinsky 1969, Roberts 1977, and stomatal conductance apparently decreased in response to falling y/ at high y/ in potted seedlings of Pinus taeda (Brix 1962) and Pinus contorta (Dykstra 1974).…”

Section: Discussionmentioning

confidence: 99%

Leaf Conductance as Related to Xylem Water Potential and Carbon Dioxide Concentration in Sitka Spruce

Beadle

Jarvis

Neilson

1979

Physiologia Plantarum

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Current year shoots of Sitka spruce [Picea sitchensis Bong. (Carr.)] from the forest canopy were equilibrated in a leaf chamber. The shoots were excised in air, and removed at differing times in order to establish a relationship between stomatal conductance and xylem water potential. The experiment was repeated at five ambient CO2 concentrations. A second set of excised forest shoots, and shoots excised from 2‐year‐ old nursery seedlings were allowed to evaporate freely in a controlled environment wind tunnel until a constant rate of transpiration was measured, to establish a relationship between cuticular conductance and xylem water potential. Cuticular conductance was estimated to be 0.012 cm s‐1 at high water potential and declined linearly to 0.007 cm s‐1 at −3.5 MPa. The implication of this decline in the subsequent calculation of stomatal and mesophyll conductance is considered. Stomatal conductance remained constant at water potentials above −1.4 MPa and was not affected by ambient carbon dioxide concentrations between 20 and 600 cm‐3. At lower water potentials, stomatal conductance declined and approached zero at −2.5 to −2.6 MPa. The results suggest that stomatal aperture is not controlled by either ambient or intercellular space carbon dioxide concentration, and that stomatal closure at low water potential is unlikely to be mediated by carbon dioxide.

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Effect of Water Stress on Photosynthesis, Respiration, and Transpiration of Four Abies Species

Cited by 37 publications

References 0 publications

Photosynthesis as related to xylem water potential and carbon dioxide concentration in Sitka spruce

Photosynthesis as related to xylem water potential and carbon dioxide concentration in Sitka spruce

Growth response of subalpine fir (Abies lasiocarpa) to climate in the Olympic Mountains, Washington, USA

Leaf Conductance as Related to Xylem Water Potential and Carbon Dioxide Concentration in Sitka Spruce

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