Abstract
Curves relating net photosynthetic rate to irradiance [P(I) curve relation] were estimated and analysed inMercurialis perennis L. plants stemming from three forest (spruce, beech and ash) stands with different tree leaf canopy development and different light regime.
The saturating irradiance (Is) reached the highest values in plants of all three stands in spring (spruce forest: 438 W m−2, beech forest: 440 W m−2 and ash forest: 367 W m−2), it declined sharply in the middle of the growing season (283, 285 and 297 W m-2, respectively) and this Is level persisted until autumn. A pronounced dynamics in plants from spruce and beech forests made itself manifest also in the adaptation (Ia) and compensating (Ic) irradiances, respectively. After a sudden decline in summer, values in autumn were close to those of the vernal season.
The most pronounced parameter, which optimally expressed the adaptation ofMercurialis perennis to various light conditions, was the photosynthetic efficiency (α) calculated as the slope of the linear part of the curve relating net photosynthetic rate to irradiance.
At the time of the highest PN sat. value in course of the growing season (August) (spruce forest: 100, beech forest: 98.7 and ash forest: 85.8 μg CO2 m−2 s−1), RD was in its minimum; in autumn PN sat. reached the lowest values which corresponded to the most intensive RD.
It was found thatMercurialis perennis plants stemming from forest stands with different light conditions did not make use equally of the altering light conditions in the course of the growing season. By the underlying analysis of P(I) curves this rhizomatous perennial herb (geophyte) may be characterized as a shade tolerant species.
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References
Björkman, O.: Ecological adaptation of the photosynthetic apparatus. — In:Akoyunoglou, G. (ed.): Photosynthesis VI. Photosynthesis and Productivity, Photosynthesis and Environment. Pp. 191–202. Balaban International Science Services, Philadelphia 1981.
Boardman, N. K.: Comparative photosynthesis of sun and shade plants. — Annu. Rev. Plant Physiol.28: 355–377, 1977.
Draskovits, R. M.: Photosynthetic capacity of species in a beechwood. I. Early spring geophyta. — Ann. Univ. Budapest, Sect. Biol.20–21: 67–71, 1979.
Draskovits, R. M.: Photosynthetic activity of species in a beechwood. II. Spring summer aspects. — Ann. Univ. Budapest, Sect. Biol.23–23: 57–64, 1981.
Eged, Š., Ješko, T.: [Light curves of the photosynthesis of leaves of the speciesPulmonaria officinalis L.] In Slovak. — Biológia (Bratislava)34: 541–546, 1979.
Eliáš, P.: Some ecophysiological features in leaves of plants in an oak-hornbeam forest. — Folia Geobot. Phytotax.14: 29–42, 1979.
Eliáš, P.: Adaptations of understorey species to exist in temperate deciduous forests. — In:Margaris, N. S., Arianoustou-Faraggitaki, M., Oechel, W. C. (ed.): Beling Alive on Land. Pp. 157–165. Dr. W. Junk Publ., The Hague 1984.
Fekete, G.: Aerial environment and tolerance ofPolygonatum odoratum (Mill.) Druce in natural communities. — Acta agron. Acad. Sci. hung.24: 89–97, 1975.
Gauhl, E.: Photosynthetic response to varying light intensity in ecotypes ofSolanum dulcamara L. from shaded and exposed habitats. — Oecologia22: 272–286, 1976.
Goryshina, T. K.: [Seasonal changes of photosynthesis in herb plants of the forest-steppe oakwood in relation to dynamics of the leaf plastid apparatus.] In Russ. — Ekologiya9: 14 to 19, 1978.
Goryshina, T. K.:[Some structural and functional features of leaf assimilatory apparatus in plants of the forest-steppe oakwood. II. Seasonal dynamics of plastid apparatus in the herbaceous cover.] In Russ. — Bot. Zh.64: 469–478, 1979.
Grime, J. P.: Shade avoidance and shade tolerance in flowering plants. — In:Bainbridge, R., Evans, G. C., Rackham, O. (ed.): Light as an Ecological Factor. Pp. 187–207. Blackwell, New York 1966.
Hutchings, M. J.: Spectral transmission and the aerial profile in mature stands ofMercurialis perennis L. — Ann. Bot.40: 1207–1216, 1976.
Hutchings, M. J. Barkham, J. P.: An investigation of shoot interactions inMercurialis perennis L., a rhizomatous perennial herb. — J. Ecol.64: 723–743, 1976.
Lukyanova, L. M., Bulycheva, T. M.: [On the light curves of photosynthesis in herbaceous plants of the Khibiny forest belt.] In Russ. — Bot. Zh.68: 1556–1561, 1983.
Masarovičová, E.: Gasometrical investigation into CO2 exchange of theFagus silvatica L. species under controlled conditions. — Biologické Práce30: 1–120, 1984.
Mitina, M. B.: [Light curves of photosynthesis of the herbaceous plants of the oak-grove.] In Russ. — Bot. Zh.66: 1454–1464, 1981.
Mukerji, S. K.: Contribution to the autecologyof Mercurialis perennis L. — J. Ecol.24: 38 to 81 and 317 to 339, 1936.
Pons, T. L.: An ecophysiological study in the field layer of ash coppice. I, Field measurements. — Acta bot. neerl.25: 401–416, 1976.
Pons, T. L.: An ecophysiological study in the field layer of ash coppice. II. Experiments with.Geum urbanum andCirsium palustre in different light intensities. — Acta bot. neerl.26: 29–42, 1977a.
Pons, T. L.: An ecophysiological study in the field layer of ash coppice. III. Influence of diminishing light intensity during growth onGeum urbanum andCirsium palustre. — Acta bot. neerl.26: 251–263, 1977b.
Sparling, J. H.: Assimilation rates of some woodland herbs in Ontario. — Bot. Gaz.123: 160 to 168, 1967.
Whale, D. M.: Seasonal variation in the gas exchange characteristics ofPrimula species. — Oecologia59: 377–383, 1983.
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Masarovičova, E., Eliáš, P. Seasonal changes in the photosynthetic response ofMercurialis perennis plants from different light regime conditions. Biol Plant 27, 41–50 (1985). https://doi.org/10.1007/BF02894633
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DOI: https://doi.org/10.1007/BF02894633