Effect of flooding and temperature regime on growth and stomatal resistance ofBetula platyphylla var.japonica seedlings |
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Authors: | H Tsukahara T T Kozlowski |
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Institution: | (1) Department of Forestry, University of Wisconsin, 53706 Madison, WI, USA |
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Abstract: | Summary Both flooding and low temperature reduced height and stem diameter growth; leaf initiation; growth of leaves, stems, and roots;
and lowered root-shoot ratios of 112-dayoldBetula platyphylla var.japonica seedlings. Flooding also induced leaf scorching and abscission. Growth was reduced much more by flooding than by low temperature.
Interactive effects of flooding and temperature were shown on height growth, leaf initiation and expansion, and dry weight
increment of leaves, stems and roots. The amount of growth reduction by flooding and low temperature was greater when based
on analysis of dry weight increment of leaves, stems, and roots, than on their relative growth rates. The greater reduction
of growth by flooding than by low temperature was associated with fewer and smaller leaves, more leaf injury, more stomatal
closure, and greater decay of roots in flooded plants. Flooding and low temperature appeared to reduce growth by somewhat
different physiological mechanisms.
Research supported by the College of Agricultural and Life Sciences, University of Wisconsin, Madison, WI, USA and by Yamagata
University, Tsuruoka, Japan. McIntyre-Stennis Project 2599. |
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Keywords: | Adaptations Betula platyphylla var japonica Flooding Growth Stomatal Aperture Temperature |
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