Assessing the Significance of Above- and Belowground Carbon Allocation of Fast- and Slow-Growing Families of Loblolly Pine - Final Report

Topa, M. A. ; Weinstein, D. A. ; Retzlaff, W. A.

Boyce Thompson Institute for Plant Research, Ithaca, NY (United States)

关键词: Belowground Biomass;    Biomass;    Partitioning;    Genetics;    Carbon Allocation;   

DOI  :  10.2172/783597
RP-ID  :  DOE/ID/13527
RP-ID  :  FC07-97ID13527
RP-ID  :  783597

美国|英语

来源: UNT Digital Library

【 摘 要 】

During this project we experimentally evaluated the below-ground biomass and carbon allocation and partitioning of four different fast- and slow-growing families of loblolly pine located in Scotland County, NC, in an effort to increase the long-term performance of the crop. The trees were subjected to optimal nutrition and control since planting in 1993. Destructive harvests in 1998 and 2000 were used for whole?plant biomass estimates and to identify possible family differences in carbon acquisition (photosynthesis) and water use efficiency. At regular intervals throughout each year we sampled tissues for carbohydrate analyses to assess differences in whole-tree carbon storage. Mini rhizotron observation tubes were installed to monitor root system production and turnover. Stable isotope analysis was used to examine possible functional differences in water and nutrient acquisition of root systems between the various families. A genetic dissection of root ontogenic and architectural traits, including biomass partitioning, was conducted using molecular markers to better understand the functional implications of these traits on resource acquisition and whole-plant carbon allocation.