Skip to Main Content
Desiccation tolerance of five tropical seedlings in Panama. Relationship to a field assessment of drought performanceAuthor(s): Melvin T. Tyree; Bettina M.J. Engelbrecht; Gustavo Vargas; Thomas A. Kursar
Source: Plant Physiology. 132: 1439-1447.
Publication Series: Scientific Journal (JRNL)
Station: Northeastern Research Station
PDF: View PDF (1.38 MB)
DescriptionStudies of the desiccation tolerance of the seedlings of five tropical trees were made on potted plants growing in a greenhouse. Pots were watered to field capacity and then dehydrated for 3 to 9 weeks to reach various visual wilting stages, from slightly wilted to dead. Saturated root hydraulic conductance was measured with a high-pressure flowmeter, and whole-stem hydraulic conductance was measured by a vacuum chamber method. Leaf punches (5.6-mm diameter) were harvested for measurement of leaf water potential by a thermocouple psychrometer method and for measurement of fresh and dry weight. In a parallel study, the same five species were studied in a field experiment in the understory of a tropical forest, where these species frequently germinate. Control seedlings were maintained in irrigated plots during a dry season, and experimental plants were grown in similar plots with rain exclusion shelters. Every 2 to 4 weeks, the seedlings were scored for wilt state and survivorship. After a 22-week drought, the dry plots were irrigated for several weeks to verify visual symptoms of death. The field trials were used to rank drought performance of species, and the greenhouse desiccation studies were used to determine the conditions of moribund plants. Our conclusion is that the desiccation tolerance of moribund plants correlated with field assessment of drought-performance for the five species (r2 0.94).
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationTyree, Melvin T.; Engelbrecht, Bettina M.J.; Vargas, Gustavo; Kursar, Thomas A. 2003. Desiccation tolerance of five tropical seedlings in Panama. Relationship to a field assessment of drought performance. Plant Physiology. 132: 1439-1447.
- Drought until death do us part: a case study of the desiccation-tolerance of a tropical moist forest seedling-tree, Licania platypus (Hemsl.) Fritsch
Disease risk of potting media infested with Phytophthora ramorum under nursery conditions
- The role of site conditions in survival of hemlocks infested with the hemlock woolly adelgid: amelioration through the use of organic biostimulants
XML: View XML