caa a22 4500 463218167 CHVBK 20180405153203.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s11056-007-9051-x doi (NATIONALLICENCE)springer-10.1007/s11056-007-9051-x Chlorophyll fluorescence, root growth potential, and stomatal conductance as estimates of field performance potential in conifer seedlings [Elektronische Daten] [Sylvia L'Hirondelle, David Simpson, Wolfgang Binder] After cold storage, conifer seedlings in British Columbia are tested for field growth potential before planting. We compared three tests of performance potential using container-grown seedlings of Douglas-fir, interior spruce, lodgepole pine, and western larch (14 seedlots total). On several autumn dates, seedlings were lifted and stored at −2°C. The following spring we tested stored seedlings for root growth potential (RGP), chlorophyll fluorescence (CF), and stomatal conductance (Gs), and then planted seedlings in nursery beds. We assessed survival and shoot dry weight (SDW) after one growing season. Performance test results were significantly correlated with each other (r≥0.47) but showed different relationships with field performance, which varied with lift date. The best performance predictor was the sum of CF and RGP (R 2=0.79 for 78 seedlotbylift-date combinations), which minimized the risk of planting poor seedlings and not planting good seedlings. A sum of 83 for CF (Fv/Fm %) and RGP (new roots >1cm) provided a threshold above which survival and growth were good. For evergreen conifers, Gs was a good performance predictor, but required extra time to measure leaf area. We recommend a combination of CF and RGP to assess vigor of shoot and root systems before planting. Springer Science+Business Media, Inc., 2007 Stock quality nationallicence Cold storage nationallicence Survival nationallicence Shoot growth nationallicence Seedling physiology nationallicence L'Hirondelle Sylvia B.C. Ministry of Forests and Range, Research Branch Laboratory, Stn Prov Govt, PO Box 9536, V8W 9C4, Victoria, BC, Canada aut Simpson David B.C. Ministry of Forests and Range, Kalamalka Forestry Centre, 3401 Reservoir Road, V1B 2C7, Vernon, BC, Canada aut Binder Wolfgang B.C. Ministry of Forests and Range, Research Branch Laboratory, Stn Prov Govt, PO Box 9536, V8W 9C4, Victoria, BC, Canada aut New Forests Springer Netherlands 34/3(2007-11-01), 235-251 0169-4286 34:3<235 2007 34 11056 https://doi.org/10.1007/s11056-007-9051-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11056-007-9051-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- L'Hirondelle Sylvia B.C. Ministry of Forests and Range, Research Branch Laboratory, Stn Prov Govt, PO Box 9536, V8W 9C4, Victoria, BC, Canada aut NATIONALLICENCE 700 1- Simpson David B.C. Ministry of Forests and Range, Kalamalka Forestry Centre, 3401 Reservoir Road, V1B 2C7, Vernon, BC, Canada aut NATIONALLICENCE 700 1- Binder Wolfgang B.C. Ministry of Forests and Range, Research Branch Laboratory, Stn Prov Govt, PO Box 9536, V8W 9C4, Victoria, BC, Canada aut NATIONALLICENCE 773 0- New Forests Springer Netherlands 34/3(2007-11-01), 235-251 0169-4286 34:3<235 2007 34 11056 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer