RT Journal Article
SR Electronic
T1 Flood-Tolerance Ranking of Red and Freeman Maple Cultivars
JF Arboriculture & Urban Forestry (AUF)
JO JOA
FD International Society of Arboriculture
SP 31
OP 37
DO 10.48044/jauf.1999.005
VO 25
IS 1
A1 Louis B. Anella
A1 Thomas H. Whitlow
YR 1999
UL http://auf.isa-arbor.com/content/25/1/31.abstract
AB Red maple (Acer rubrum) is often recommended for use in wet soils, yet its extensive native range suggests there may be genetic variation for traits associated with flood tolerance. Likewise, genetic variation for flood tolerance may be captured within red maple cultivars making some more appropriate than others for use in wet or low oxygen soils. Seven red maple cultivars (2-year-old trees)—’Autumn Flame’®, ‘Bowhall, ‘Karpick’, ‘Northwood’, October Glory’®, Red Sunset®, and ‘Schlesinger— and 4 Freeman maple (A. × freemanii) cultivars—’Armstrong’, ‘Autumn Blaze’, ‘Morgan’, and Scarlet Sentinel™, were ranked for flood tolerance by flooding the trees and characterizing photosynthesis, lenticel intumescence, and survival. Indicator trees representing the wet extreme of red maple’s native range were also included for comparison. Net photosynthesis declined for all cultivars; however, ‘Schlesinger’, Red Sunset and ‘Bowhall had the highest net photosynthetic rates (ranging from 1.94 to 1.71 μmol/m2s) after 45 days of flooding. In contrast, ‘Karpick’, ‘Autumn Flame’, and ‘Northwood’ had net photosynthetic rates near 0. The extent of lenticel intumescence also varied among the cultivars with ‘Schlesinger’ and ‘Bowhall producing the longest lenticels. All of the ‘Northwood’ trees died, as did two-thirds of the ‘Autumn Flame’ trees. The cultivars were separated into 3 overall flood-tolerance rankings: high (‘Schlesinger’, Red Sunset, and ‘Bowhall), intermediate (‘Armstrong’, ‘Morgan’, October Glory’, Scarlet Sentinel, and ‘Autumn Blaze’), and low (‘Karpick’, ‘Autumn Flame’, and ‘Northwood’).