Growth And Physiology Of Loblolly Pine Pinus Taeda Seedlings As Affected By Genetics Of The Root System
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Release | : 2003 |
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Download Growth and Physiology of Loblolly Pine (Pinus Taeda) Seedlings as Affected by Genetics of the Root System Book in PDF, Epub and Kindle
Effects of root and shoot genotypes on productivity and physiology of loblolly pine (Pinus taeda) seedlings were evaluated in contrasting nutrient regimes. Twelve-week-old seedlings from contrasting provenances were grafted reciprocally to facilitate distinction of rootstock and scion effects. Five open-pollinated families each from a mesic region (Atlantic Coastal Plain) and from a xeric region (Lost Pines Texas) were planted in a split-plot design on a nutrient-poor site in the Sandhills region of central North Carolina. A total of 1800 seedlings were used, including non-grafted trees as controls. Half of the plots were fertilized annually, and after one and two growing seasons, seedlings were harvested for component biomass determinations. Total biomass production among families was positively related to proportional biomass allocation to roots. Generally, mesic sources produced more total biomass and allocated proportionally more biomass to roots. When fertilized, mesic rootstocks were always associated with greater mass in aboveground components, regardless of scion genotype. Rootstock affected stem growth efficiency, in that xeric rootstocks were associated with increased proportional allocation to stem, regardless of scion type. Effects of root system genotype on leaf gas exchange of selected families were evaluated and related to tree growth. In two families from each provenance, light-saturated net photosynthesis (An) and stomatal conductance (gs) were measured monthly during the second growing season. Leaf carbon isotope discrimination (C13) was analyzed to estimate water use efficiency (WUE) of genotypes. Provenances differed in stomatal conductance (gs) but not in photosynthesis (An), averaged over all months. The mesic sources had lower gs and higher intrinsic WUE (An/gs). Rootstocks affected gs and leaf C13 but not An nor WUEi of scions. Leaf tissue C13 was inversely associated with stem growth efficiency and with root biomass among families, but was u.
Author | : James Edwin Grissom |
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Total Pages | : 99 |
Release | : 2003 |
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Download Growth and Physiology of Loblolly Pine (Pinus Taeda L.) Seedlings as Affected by Genetics of the Root System Book in PDF, Epub and Kindle
Keywords: genotypes, biomass allocation, physiology, loblolly pine.
Author | : Silas Little |
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Total Pages | : 20 |
Release | : 1964 |
Genre | : Loblolly pine |
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Download Root Systems of Direct-seeded and Variously Planted Loblolly, Shortleaf, and Pitch Pines Book in PDF, Epub and Kindle
S2The study was designed to compare direct seeding with several planting procedures in terms of tree performance through the period of a stand rotation. As part of the study, sample seedlings were excavated in 1962 to determine the early effects of the treatments on root systems. This paper describes and pictures the root systems, and the differences among them that related to the method of seedling establishment.S3.
Author | : Robert George Paul Clifton |
Publisher | : |
Total Pages | : 222 |
Release | : 1986 |
Genre | : Loblolly pine |
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Download Screening Container-grown Loblolly Pine (Pinus Taeda L.) Seedlings for Growth and Survival Differences Based on Physiological Responses Book in PDF, Epub and Kindle
Abstract.
Author | : Shakuntala Sharma |
Publisher | : |
Total Pages | : 170 |
Release | : 2014 |
Genre | : Loblolly pine |
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Download Effect of Seedling Stock and Spacing on the Early Stand Development and Physiology of Improved Loblolly Pine (Pinus Taeda L.) Seedlings Book in PDF, Epub and Kindle
Author | : David S. Priester |
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Total Pages | : 12 |
Release | : 1978 |
Genre | : Allelopathy |
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Download Inhibitory Effects of Broomsedge Extracts on the Growth of Young Loblolly Pine Seedlings Book in PDF, Epub and Kindle
Author | : H. S. Larsen |
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Total Pages | : 15 |
Release | : 1985 |
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Download Root Growth Potential of Loblolly Pine (Pinus Taeda L.) Seedlings Form Twenty Southern Nurseries Book in PDF, Epub and Kindle
Author | : William R Harms |
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Total Pages | : 12 |
Release | : 1977 |
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Download Competition-density effects in a loblolly pine seedling stand Book in PDF, Epub and Kindle
Author | : Harry Stites Larsen |
Publisher | : |
Total Pages | : 15 |
Release | : 1986 |
Genre | : Loblolly pine |
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Download Root Growth Potential of Loblolly Pine (Pinus Taeda L.) Seedlings from Twenty Southern Nurseries Book in PDF, Epub and Kindle
Author | : James Henry Leach |
Publisher | : |
Total Pages | : 116 |
Release | : 1976 |
Genre | : Loblolly pine |
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Download Root Development in Young Loblolly Pine (Pinus Taeda L.) from Two Seed Sources Book in PDF, Epub and Kindle