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Home → Publications → Tree Improvement and Genetics → Southern Forest Tree Improvement Conference → 18th Southern Forest Tree Improvement Conference (1985) → Comparative Physiology Of Loblolly Pine Seedlings From Seven Geographic Sources As Related To Growth Rate

Comparative Physiology Of Loblolly Pine Seedlings From Seven Geographic Sources As Related To Growth Rate

Growth, photosynthesis and water relations characteristics were examined in loblolly pine seedlings from seven diverse geographic sources. At the end of the first year, Florida trees were largest in height and dry weight, while Texas and Arkansas trees were smallest. Seed source size rankings were established by the fifteenth week of growth and were correlated with seed weights and both earliness and completeness of bud-set. They were also correlated with net photosynthesis at each of eleven dates during the growing season. This appears to result primarily from differences in leaf area accretion. When photosynthesis was measured on a unit leaf area basis, differences among the provenances were absent, except late in the year when Florida trees were most active.


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Author(s): Bruce C. Bongarten, Robert O. Teskey, Brett A. Boltz

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1985