Respiration and nitrogen and carbohydrate contents in perennial rhizome-forming plants as related to realization of different adaptive strategies

Respiration and nitrogen and carbohydrate contents in perennial rhizome-forming plants as related... Accumulation of biomass, the respiration rate, and the contents of total nitrogen and nonstructural carbohydrates were studied for 14 perennial long-rhizome-forming species differing in the type of adaptive strategy. Fast-growing species with well expressed competitive-ruderal properties (CR plants) were characterized by a higher productivity, a better nitrogen status, and more intense respiration than slowly growing stress-tolerant species (S plants). The proportion of rhizomes in the weight of the whole plant varied from 30 to 70% and was higher in S species. In CR species, the respiration rate measured in rhizomes at 20°C was equal on the average to 1 mg CO2/(g dry wt h), which was threefold higher than in S species. In S species, a considerable amount of nitrogen (50%) was present in rhizomes, whereas in CR species, most part of nitrogen (70–80%) was localized in the aboveground organs. The correlation analysis revealed a direct dependence (r = 0.75) between the respiration rate and nitrogen content in leaves; in the rhizomes the correlation between these indices was low (r = 0.39). The content of carbohydrates in the leaves and sink organs, rhizomes, was determined by the type of plant ecological strategy and life duration of their photosynthesizing organs (summergreen, evergreen species). In general, the results obtained demonstrated a close relation between adaptive strategy, ecological confinement, the rhythm of seasonal development, and physiological properties of long-rhizome-forming plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Respiration and nitrogen and carbohydrate contents in perennial rhizome-forming plants as related to realization of different adaptive strategies

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2010 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Sciences ; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443710050055
Publisher site
See Article on Publisher Site

Abstract

Accumulation of biomass, the respiration rate, and the contents of total nitrogen and nonstructural carbohydrates were studied for 14 perennial long-rhizome-forming species differing in the type of adaptive strategy. Fast-growing species with well expressed competitive-ruderal properties (CR plants) were characterized by a higher productivity, a better nitrogen status, and more intense respiration than slowly growing stress-tolerant species (S plants). The proportion of rhizomes in the weight of the whole plant varied from 30 to 70% and was higher in S species. In CR species, the respiration rate measured in rhizomes at 20°C was equal on the average to 1 mg CO2/(g dry wt h), which was threefold higher than in S species. In S species, a considerable amount of nitrogen (50%) was present in rhizomes, whereas in CR species, most part of nitrogen (70–80%) was localized in the aboveground organs. The correlation analysis revealed a direct dependence (r = 0.75) between the respiration rate and nitrogen content in leaves; in the rhizomes the correlation between these indices was low (r = 0.39). The content of carbohydrates in the leaves and sink organs, rhizomes, was determined by the type of plant ecological strategy and life duration of their photosynthesizing organs (summergreen, evergreen species). In general, the results obtained demonstrated a close relation between adaptive strategy, ecological confinement, the rhythm of seasonal development, and physiological properties of long-rhizome-forming plants.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Sep 2, 2010

References

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