Plant Physiol. Drug Metab Dispos
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Plant Physiology 66:267-271 (1980)
© 1980 American Society of Plant Biologists

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Growth Responses and Adaptations of Fraxinus pennsylvanica Seedlings to Flooding 1

A. R. Sena Gomes2 and T. T. Kozlowski

Department of Forestry, University of Wisconsin, Madison, Wisconsin 53706

Flooding induced several physiological and morphological changes in Fraxinus pennsylvanica seedlings, with stomatal closure among the earliest responses. Subsequent changes included: reduction in dry weight increment of roots, stems, and leaves; formation of hypertrophied lenticels and production of adventitious roots on submerged portions of the stem above the soil line; leaf necrosis; and leaf abscission. After 15 days of stomatal closure as a result of flooding, stomata began to reopen progressively until stomatal aperture was similar in flooded and unflooded plants. Adventitious roots began to form at about the time stomatal reopening began. As more adventitious roots formed, elongated, and branched, the stomata opened further. The formation of adventitious roots was an important adaptation for flooding tolerance as shown by the high efficiency of adventitious roots in absorption of water and in high correlation between the production of adventitious roots and stomatal reopening.

2 Present address: CEPEC, Caixa Postal 7, Itabuna, Bahia, Brazil.

1 This research was supported by: the College of Agricultural and Life Sciences, University of Wisconsin, Madison; CEPEC (Cocoa Research Center), Bahia, Brazil; and EMBRAPA (Brazilian Research Institute), Brasilia, Brazil.




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C. L. Medina, M. C. Sanches, M. L. S. Tucci, C. A. F. Sousa, G. R. F. Cuzzuol, and C. A. Joly
Erythrina speciosa (Leguminosae-Papilionoideae) under soil water saturation: morphophysiological and growth responses
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[Abstract] [Full Text] [PDF]


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