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Title: Source-sink-storage relationships of conifers

Abstract

Irradiance, air temperature, saturation vapor pressure deficit, and soil temperature vary in association with Earth`s daily rotation, inducing significant hourly changes in the rates of plant physiological processes. These processes include carbon fixation in photosynthesis, sucrose translocation, and carbon utilization in growth, storage, and respiration. The sensitivity of these physiological processes to environmental factors such as temperature, soil water availability, and nutrient supply reveals differences that must be viewed as an interactive whole in order to comprehend whole-plant responses to the environment. Integrative frameworks for relationships between plant physiological processes are needed to provide syntheses of plant growth and development. Source-sink-storage relationships, addressed in this chapter, provide one framework for synthesis of whole-plant responses to external environmental variables. To address this issue, some examples of carbon assimilation and utilization responses of five conifer species to environmental factors from a range of field environments are first summarized. Next, the interactions between sources, sinks, and storages of carbon are examined at the leaf and tree scales, and finally, the review evaluates the proposition that processes involved with carbon utilization (sink activity) are more sensitive to the supply of water and nutrients (particularly nitrogen) than are the processes of carbon gain (source activity)more » and carbon storage. The terms {open_quotes}sink{close_quotes} and {open_quotes}source{close_quotes} refer to carbon utilization and carbon gain, respectively. The relative roles of stored carbon reserves and of current photosynthate in meeting sink demand are addressed. Discussions focus on source-sink-storage relationships within the diurnal, wetting-drying, and annual cycles of conifer growth and development, and some discussion of life cycle aspects is also presented.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Wyoming Univ., Laramie, WY (United States). Dept. of Botany
OSTI Identifier:
62344
Report Number(s):
DOE/ER/61253-1-Vol.2; CONF-9109550-Vol.2
TRN: 95:004107-0006
Resource Type:
Conference
Resource Relation:
Conference: Workshop on physiological ecology of coniferous forests, Laramie, WY (United States), 16-19 Sep 1991; Other Information: PBD: 1995; Related Information: Is Part Of Resource physiology of conifers: Acquisition, allocation, and utilization; Smith, W.K. [ed.] [Univ. of Wyoming, Laramie, WY (United States). Dept. of Botany]; Hickley, T.M. [ed.] [Univ. of Washington, Seattle, WA (United States). Coll. of Forest Resources]; PB: 409 p.
Country of Publication:
United States
Language:
English
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; 54 ENVIRONMENTAL SCIENCES; CONIFERS; PLANT GROWTH; CARBON SOURCES; CARBON SINKS; NUTRIENTS; PHOTOSYNTHESIS; CORRELATIONS; AVAILABILITY; TEMPERATURE DEPENDENCE; SEASONAL VARIATIONS

Citation Formats

Luxmoore, R J, Oren, R, Sheriff, D W, and Thomas, R B. Source-sink-storage relationships of conifers. United States: N. p., 1995. Web.
Luxmoore, R J, Oren, R, Sheriff, D W, & Thomas, R B. Source-sink-storage relationships of conifers. United States.
Luxmoore, R J, Oren, R, Sheriff, D W, and Thomas, R B. 1995. "Source-sink-storage relationships of conifers". United States.
@article{osti_62344,
title = {Source-sink-storage relationships of conifers},
author = {Luxmoore, R J and Oren, R and Sheriff, D W and Thomas, R B},
abstractNote = {Irradiance, air temperature, saturation vapor pressure deficit, and soil temperature vary in association with Earth`s daily rotation, inducing significant hourly changes in the rates of plant physiological processes. These processes include carbon fixation in photosynthesis, sucrose translocation, and carbon utilization in growth, storage, and respiration. The sensitivity of these physiological processes to environmental factors such as temperature, soil water availability, and nutrient supply reveals differences that must be viewed as an interactive whole in order to comprehend whole-plant responses to the environment. Integrative frameworks for relationships between plant physiological processes are needed to provide syntheses of plant growth and development. Source-sink-storage relationships, addressed in this chapter, provide one framework for synthesis of whole-plant responses to external environmental variables. To address this issue, some examples of carbon assimilation and utilization responses of five conifer species to environmental factors from a range of field environments are first summarized. Next, the interactions between sources, sinks, and storages of carbon are examined at the leaf and tree scales, and finally, the review evaluates the proposition that processes involved with carbon utilization (sink activity) are more sensitive to the supply of water and nutrients (particularly nitrogen) than are the processes of carbon gain (source activity) and carbon storage. The terms {open_quotes}sink{close_quotes} and {open_quotes}source{close_quotes} refer to carbon utilization and carbon gain, respectively. The relative roles of stored carbon reserves and of current photosynthate in meeting sink demand are addressed. Discussions focus on source-sink-storage relationships within the diurnal, wetting-drying, and annual cycles of conifer growth and development, and some discussion of life cycle aspects is also presented.},
doi = {},
url = {https://www.osti.gov/biblio/62344}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 1995},
month = {Sat Jul 01 00:00:00 EDT 1995}
}

Conference:
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