Water relations, chlorophyll a fluorescence, and contents of saccharides in tree species of a tropical forest in response to flood

• DOI: 10.1007/s11099-005-0034-x
• Publication Date: 2005-09-12T13:49:42Z
• Authors: E. Rengifo; W. Tezara; A. Herrera
• Keywords: Stomatal Conductance; Plant Physiology

We studied the seasonal changes in water relations, chlorophyll a fluorescence, and leaf saccharide contents of tropical flood-tolerant trees Acosmium nitens, Campsiandra laurifolia, Eschweilera tenuifolia, Symmeria paniculata, Psidium ovatifolium. Xylem potential increased with flooding to larger extent than sap osmotic all species, soluble sugars contributed up 66 % at maximum flooding. Starch was accumulated leaves. Maximum quantum yield photosystem 2 decreased emerged leaves, values being always higher 0.76. Daily net photosynthetic rate conductance species. This reduction associated species but S. paniculata absence compensatory increase non-photochemical quenching.