TY - JOUR
T1 - Intraspecific variation in the response of Taxodium distichum seedlings to salinity
AU - Allen, James A.
AU - Chambers, Jim L.
AU - McKinney, De Marion
N1 - Funding Information:
The authors thank the numerous colleagues at the National Wetlands Research Center who provided assistance in the field, greenhouse and laboratory, especially John McCoy. Also, the statistical advice of Darren Johnson and Ziad Ma-laeb is gratefully acknowledged. Finally, the authors would like to thank Bob Keeland, Beth Vairin, Elizabeth Rockwell, and three anonymous reviewers for suggestions on earlier drafts of this manuscript. This research was supported by the National Biological Survey and the Gilbert Foundation Fellowship Program of the School of Wildlife and Fisheries at Louisiana State University.
PY - 1994/12
Y1 - 1994/12
N2 - Seedlings of 15 open-pollinated families of baldcypress (Taxodium distichum) were tested for their tolerance to combined salinity and flooding strees. Ten of the families were from coastal locations in Louisiana or Alabama, USA, that were slightly brackish. The other families were from locations not affected by saltwater intrusion. Five salinity levels were investigated - 0, 2, 4, 6, and 8 g l-1 artificial seawater-all with flooding to approximately 5 cm above the soil surface. Survival, height growth, leaf area and total biomass all declined with increasing salinity. Significant variation was found among salinity levels, families, and salinity×family interactions for leaf area and total biomass. Two tolerance indices were also developed to compare family response with salinity. In generalm families from brackish sources had greater total biomass, leaf area, and tolerance index values than families from freshwater sources at the higher salinity levels. A selection and breeding program designed to develop moderately salt-tolerant baldcypress seedlings for use in wetland restoration projects and other applications appears to be well-justified.
AB - Seedlings of 15 open-pollinated families of baldcypress (Taxodium distichum) were tested for their tolerance to combined salinity and flooding strees. Ten of the families were from coastal locations in Louisiana or Alabama, USA, that were slightly brackish. The other families were from locations not affected by saltwater intrusion. Five salinity levels were investigated - 0, 2, 4, 6, and 8 g l-1 artificial seawater-all with flooding to approximately 5 cm above the soil surface. Survival, height growth, leaf area and total biomass all declined with increasing salinity. Significant variation was found among salinity levels, families, and salinity×family interactions for leaf area and total biomass. Two tolerance indices were also developed to compare family response with salinity. In generalm families from brackish sources had greater total biomass, leaf area, and tolerance index values than families from freshwater sources at the higher salinity levels. A selection and breeding program designed to develop moderately salt-tolerant baldcypress seedlings for use in wetland restoration projects and other applications appears to be well-justified.
KW - Flooding
KW - Intraspecific variation
KW - Salinity
KW - Salt tolerance index
KW - Taxodium distichum
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U2 - 10.1016/0378-1127(94)90087-6
DO - 10.1016/0378-1127(94)90087-6
M3 - Article
AN - SCOPUS:0028162674
SN - 0378-1127
VL - 70
SP - 203
EP - 214
JO - Forest Ecology and Management
JF - Forest Ecology and Management
IS - 1-3
ER -