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| Publication Type:
| Refereed |
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| Author(s): | Atkin, Owen K.;
Westbeek, Milka H. M.;
Cambridge, Marion L.;
Lambers, Hans;
Pons, Thijs L. |
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| Author Affiliation: | Department of Plant Ecology and Evolutionary Biology, Utrecht University, P.O. Box 800.84, 3508 TB Utrecht, The Netherlands |
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| Title: | Leaf respiration in light and darkness: a comparison of slow- and fast-growing Poa species |
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| Section: | Whole Plant, Environmental, and Stress Physiology
Other records with the "Whole Plant, Environmental, and Stress Physiology" Section
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| Source: | Plant Physiology. Vol. 113, No. 3, March 1997, p. 961-965. |
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| Publishing Information: | Rockville, MD: American Society of Plant Physiologists |
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| # of Pages: | 5 |
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| Keywords: | TIC Keywords: Respiration; Light; Dark; Poa annua; Photosynthesis; Growth studies; Growth factors; Growth rate; Poa compressa; Poa Pratensis; Poa trivialis; Poa alpina
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| Abstract/Contents: | "We investigated whether leaf dark respiration (nonphotorespiratory mitochrondrial COā release) is inhibited by light in several Poa species, and whether differences in light inhibition between the species are related to differences in the rate of leaf net photosynthesis. Four lowland (Poa annua L., Poa compressa L., Poa pratensis L., and Poa trivialis L.), one subalpine (Poa alpina L.) and two alpine (Poa costiniana Vick. and Poa fawcettiae Vick.) Poa species differing in whole plant relative growth rates were grown under identical controlled conditions. Nonphotorespiratory mitochrondrial COā release in the light (R^D[d) was estimated according to the Laisk method. Photosynthesis was measured at ambient COā partial pressure (35 Pa) and 500 umol photons ā»Ā² ā»Ā¹. The rate of photosynthesis per unit leaf was positively correlated with the relative growth rate, with the slow-growing alpine Poa species exhibiting the lowest photosynthetic rates. Rates of both R^D[d and respiration in darkness were also substantially lower in the alpine species. Nonphotorespiratory COā release in darkness was higher than R^D[d in all species. However, despite some variation between the species in the level of light inhibition of respiration, no relationship was observed between the level of inhibition and the rate of photosynthesis. Similarly, the level of inhibition was not correlated with the relative growth rate. Our results support the suggestion that rates of leaf respiration in the light are closely associated with rates in darkness." |
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| Language: | English |
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| References: | 22 |
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| Note: | Figures |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Atkin, O. K., M. H. M. Westbeek, M. L. Cambridge, H. Lambers, and T. L. Pons. 1997. Leaf respiration in light and darkness: a comparison of slow- and fast-growing Poa species. Plant Physiol. 113(3):p. 961-965. |
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