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Responses of Cherrybark Oak Seedlings to Short-Term Flooding

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Abstract:

Effects of short-term flooding on water status, stomatal conductance and net photosynthesis of cherrybark oak (Quercus falcata var. pagodaefolia Ell.) seedlings were studied under controlled environment conditions. Flooding for 6 days induced significant stomatal closure, reduced transpiration, and reduced net photosynthesis. The response to flooding was almost immediate with maximum and average daily values of transpiration, stomatal conductance, and net photosynthesis reduced sharply within one day following flooding. Average diurnal stomatal conductance declined from 0.44 cm s-1 to 0.32 cm s-1 at 24 hours and to 0.23 cm s-1 at 48 hours after flooding began, while average diurnal net photosynthesis was reduced from 6.85 mg CO2 dm-2 h-1 to 3.07 and 0.86 mg CO2 dm-2 h-1 at 24 and 48 hours after flooding, respectively. Low levels of stomatal conductance and net photosynthesis continued throughout the entire experiment and average daily net photosynthesis fell below zero for the fourth through sixth days of flooding. Leaf xylem pressure potential measurements, however, suggested that water deficits did not develop as a result of flooding. The recovery of stomatal functioning during the 3 days after termination of flooding was relatively slow. Rapid stomatal closure and significant declines in net photosynthesis are probably important factors contributing to the intolerance of cherrybark oak seedlings to flooding. Forest Sci. 31:760-771.

Keywords: Quercus falcata var. pagodaefolia; photosynthesis; stomatal conductance

Document Type: Journal Article

Affiliations: School of Forestry, Wildlife, and Fisheries, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Baton Rouge, LA 70803

Publication date: 1985-09-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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