Growth, photosynthesis and respiration in Plantago coronopus as affected by salinity

Growth, photosynthesis and respiration in Plantago coronopus as affected by salinity Plantago coronopus was grown in a non‐saline culture solution and in a culture solution containing 50 mM NaCl. The rates of dry matter accumulation in both roots and shoots were not affected by 50 mM NaCl. Photosynthesis, expressed per shoot, was also the same in both environments. Neither the rate of shoot respiration nor that of root respiration was affected by salinity. In both environments the alternative respiratory pathway contributed to the same extent in root respiration. The activity of the alternative pathway decreased with increasing age. Since the respiratory activities were the same in plants grown under both saline and non‐saline conditions and since the alternative respiratory pathway was also equally active in roots under both environmental conditions, it is concluded that respiratory costs involved in growth in 50 mM NaCl are negligible in terms of the plant's total energy costings. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physiologia Plantarum Wiley

Growth, photosynthesis and respiration in Plantago coronopus as affected by salinity

Physiologia Plantarum, Volume 51 (3) – Mar 1, 1981

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Publisher
Wiley
Copyright
Copyright © 1981 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0031-9317
eISSN
1399-3054
DOI
10.1111/j.1399-3054.1981.tb04475.x
Publisher site
See Article on Publisher Site

Abstract

Plantago coronopus was grown in a non‐saline culture solution and in a culture solution containing 50 mM NaCl. The rates of dry matter accumulation in both roots and shoots were not affected by 50 mM NaCl. Photosynthesis, expressed per shoot, was also the same in both environments. Neither the rate of shoot respiration nor that of root respiration was affected by salinity. In both environments the alternative respiratory pathway contributed to the same extent in root respiration. The activity of the alternative pathway decreased with increasing age. Since the respiratory activities were the same in plants grown under both saline and non‐saline conditions and since the alternative respiratory pathway was also equally active in roots under both environmental conditions, it is concluded that respiratory costs involved in growth in 50 mM NaCl are negligible in terms of the plant's total energy costings.

Journal

Physiologia PlantarumWiley

Published: Mar 1, 1981

References

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