Respiration rate of arctic plants as related to the production process

Respiration rate of arctic plants as related to the production process This work deals with two intertwined questions: (1) what are the factors underlying equally high respiration rates of arctic plants at low temperature and of temperate zone plants at 20–25°C and (2) whether this respiration feature would explain small size of the northern plants. In an attempt to answer these questions, we collected various hypotheses scattered in the current literature and experimentally examined the respiration- growth relationships by analyzing plant productivity characteristics in three representative species inhabiting Wrangel Island (lat. 71°N). The results show that the components of the production process stay in accord in the arctic plants so that their productivity characteristics at low temperatures are nearly the same as in the temperate zone plants at higher temperatures. Hence, respiration cannot account for small size of the northern plants. Upon the experimental results and general concepts for regulation of respiration, we conclude that the intense respiration of plants inhabiting cold climate regions is caused by higher metabolic demands for energy and intermediates under the northern conditions. The enhanced metabolic demands of plants at low temperature represent the main factor of intense respiration. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Respiration rate of arctic plants as related to the production process

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2009 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Sciences ; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443709030029
Publisher site
See Article on Publisher Site

Abstract

This work deals with two intertwined questions: (1) what are the factors underlying equally high respiration rates of arctic plants at low temperature and of temperate zone plants at 20–25°C and (2) whether this respiration feature would explain small size of the northern plants. In an attempt to answer these questions, we collected various hypotheses scattered in the current literature and experimentally examined the respiration- growth relationships by analyzing plant productivity characteristics in three representative species inhabiting Wrangel Island (lat. 71°N). The results show that the components of the production process stay in accord in the arctic plants so that their productivity characteristics at low temperatures are nearly the same as in the temperate zone plants at higher temperatures. Hence, respiration cannot account for small size of the northern plants. Upon the experimental results and general concepts for regulation of respiration, we conclude that the intense respiration of plants inhabiting cold climate regions is caused by higher metabolic demands for energy and intermediates under the northern conditions. The enhanced metabolic demands of plants at low temperature represent the main factor of intense respiration.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: May 10, 2009

References

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