Effects of increased solar ultraviolet radiation on terrestrial ecosystems

Journal of Photochemistry and Photobiology B: Biology

Volumn 46, Issue 1-3, 1998, Pages 40-52

  Caldwell, M M ^a   Bjorn L O ^b   Bornman, J F ^b   Flint, S D ^a   Kulandaivelu, G ^c   Teramura, A H ^d   Tevini, M ^e  

^a UTAH STATE UNIVERSITY   (United States)

^b LUND UNIVERSITY   (Sweden)

^c MADURAI KAMARAJ UNIVERSITY   (India)

^d UNIVERSITY OF HAWAII   (United States)

^e UNIVERSITY OF KARLSRUHE   (Germany)

Author keywords

Action spectra; Competitive balance; DNA; Ozone; Terrestrial ecosystems; Ultraviolet B radiation

Indexed keywords

CARBON DIOXIDE; OZONE;

ARTICLE; CHEMICAL COMPOSITION; CROP; ECOSYSTEM; ENVIRONMENT; ENVIRONMENTAL TEMPERATURE; GENE ACTIVITY; GENETIC ENGINEERING; INSECT; MICROORGANISM; NONHUMAN; NUTRIENT; OZONE LAYER; PLANT; PRIORITY JOURNAL; SOLAR RADIATION; ULTRAVIOLET B RADIATION;

EID: 0344076305     PISSN: 10111344     EISSN: None     Source Type: Journal    
DOI: 10.1016/S1011-1344(98)00184-5     Document Type: Article

References (127)

1. [1] R.G. Zepp, T.V. Callaghan, D.J. Erickson, Effects of enhanced solar ultraviolet radiation on biogeochemical cycles, J. Photochem. Photobiol. B: Biol. 46 (1998) 69-82.
2. [2] D.-P. Häder, H.D. Kumar, R.C. Smith, R.C. Worrest, Effects on aquatic biosystems, J. Photochem. Photobiol. B: Biol. 46 (1998) 53-68.
3. [3] H.S. Johnston, Reduction of stratospheric ozone by nitrogen oxide catalysts from supersonic transport exhaust, Science 173 (1971) 517-522.
4. [4] P.J. Crutzen, SSTs - a threat to the earth's ozone shield, Ambio 1 (1972) 41-51.
5. [5] J.F. Bornman, Target sites of UV-B radiation in photosynthesis of higher plants, J. Photochem. Photobiol. B: Biol. 4 (1989) 145-158.
6. [6] M.M. Caldwell, A.H. Teramura, M. Tevini, The changing solar ultraviolet climate and the ecological consequences for higher plants. Trends Ecology Evolution 4 (1989) 363-367.
7. 3) on vegetation, Environmental Pollution 61 (1989) 263-393.
8. [8] M. Tevini, A.H. Teramura, UV-B effects on terrestrial plants, Photochem. Photobiol. 50 (1989) 479-487.
9. [9] A.E. Stapleton, Ultraviolet radiation and plants: burning questions, Plant Cell 4 (1992) 1353-1358.
10. [10] J.F. Bornman, A.H. Teramura, Effects of ultraviolet-B radiation on terrestrial plants, in: A.R. Young, L.O. Björn, J. Moan, W. Nultsch (Eds.), Environmental UV-Photobiology, Plenum, New York, 1993, pp. 427-471.
11. [11] M.M. Caldwell, S.D. Flint, Implications of increased solar UV-B for terrestrial vegetation, in: M.L. Chanin (Ed.), The Role of the Stratosphere in Global Change, Springer, Heidelberg, 1993, pp. 495-516.
12. [12] M.M. Caldwell, S.D. Flint, Solar ultraviolet radiation and ozone layer change: implications for crop plants, in: K. Boote, J.M. Bennett, T.R. Sinclair, G.M. Paulsen (Eds.), Physiology and Determination of Crop Yield, ASA-CSSA-SSSA, Madison, WI, 1994, pp. 487-507.
13. [13] M.M. Caldwell, S.D. Flint, Stratospheric ozone reduction, solar UV-B radiation and terrestrial ecosystems, Climatic Change 28 (1994) 375-394.
14. [14] A. Strid, W.S. Chow, J.M. Anderson, UV-B damage and protection at the molecular level in plants, Photosynth. Res. 39 (1994) 475-489.
15. [15] M. Tevini, Effects of enhanced UV-B radiation on terrestrial plants, in: M. Tevini (Ed.), UV-B Radiation and Ozone Depletion: Effects on Humans, Animals, Plants, Microorganisms, and Materials, Lewis Publishers, Boca Raton, FL, 1993, pp. 125-153.
16. [16] M. Tevini, UV-B effects on terrestrial plants and aquatic organisms, Progr. Botany 55 (1994) 174-190.
17. [17] M. Tevini, Erhöhte UV-B-Strahlung: Ein Risiko für Nutzpflanzen?, Biologie in unserer Zeit 4 (1996) 246-254.
18. [18] A.H. Teramura, J.H. Sullivan, Effects of UV-B radiation on photosynthesis and growth of terrestrial plants, Photosynth. Res. 39 (1994) 463-473.
19. 3), and ultraviolet-B (UV-B) radiation on plant diseases, Environmental Pollution 88 (1995) 219-245.
20. [20] J.F. Bornman, C. Sundby-Emanuelsson, Response of plants to UV-B radiation: some biochemical and physiological effects, in N. Smirnoff (Ed.), Environment and Plant Metabolism, BioScientific, Oxford, 1995, pp. 245-262.
21. [21] L.O. Björn, Effects of ozone depletion and increased UV-B on terrestrial ecosystems, Int. J. Environment. Studies 51 (1996) 217-243.
22. [22] B.R. Jordan, The effects of ultraviolet-B radiation on plants: A molecular perspective, Adv. Botan. Res. 22 (1996) 97-162.
23. [23] H. Panten, J.-P. Schnitzler, R. Steinbrecher, Wirkung von Ulraviolettstrahlung auf Pflanzen, Naturwiss. Rundsch. 9 (1996) 343-348.
24. 2 on photosynthesis and growth: implications for terrestrial ecosystems, Plant Ecology 128 (1997) 194-206.
25. [25] J. Rozema, J.W.M. van de Staaij, M. Tosserams, Effects of UV-B radiation on plants from agro- and natural ecosystems, in: P.J. Lumsden (Ed.), Plants and UV-B: Responses to Environmental Change, Cambridge University Press, Cambridge, 1997, pp. 213-232.
26. [26] J. Rozema, J. van de Staaij, L.O. Björn, M.M. Caldwell, UV-B as an environmental factor in plant life: stress and regulation, Trends Ecology Evolution 12 (1997) 22-28.
27. [27] A.R. Blaustein, P.D. Hoffman, D.G. Hokit, J.M. Kiesecker, S.C. Walls, J.B. Hays, UV repair and resistance to solar UV-B in amphibian eggs: a link to population declines?, Proc. Natl. Acad. Sci. USA 91 (1994) 1791-1795.
28. [28] C. Gehrke, U. Johanson, T. Callaghan, D. Chadwick, C.H. Robinson, The impact of enhanced ultraviolet-B radiation on litter quality and decomposition processes in Vaccinium leaves from the Subarctic, Oikos 72 (1995) 213-222.
29. [29] J. Longstreth, F.R. de Gruijl, M.L. Kripke, S. Abseck, F. Arnold, H.I. Slaper, G. Velders, T. Takizawa, J.C. van der Leun, Health risks, J. Photochem. Photobiol. B: Biol. 46 (1998) 20-39.
30. [30] J. Jagger, Near-UV radiation effects on microorganisms, Photochem. Photobiol. 34 (1981) 761-768.
31. [31] X. Tang, S. Madronich, T. Walligton, D. Calamari, Changes in tropospheric composition and air quality. J. Photochem. Photobiol. B: Biol. 46 (1998) 83-95.
32. [32] J. Li, T.-M. Ou-Lee, R. Raba, R.G. Amundson, R.L. Last, Arabidopsis flavonoid mutants are hypersensitive to UV-B irradiation, Plant Cell 5 (1993) 171-179.
33. [33] S. Reuber, J.F. Bornman, G. Weissenböck, A flavonoid mutant of barley (Hordeum vulgare L.) exhibits increased sensitivity to UV radiation in the primary leaf, Plant, Cell Environment 19 (1996) 593-601.
34. [34] J.F. Bornman, T.C. Vogelmann, Effect of UV-B radiation on leaf optical properties measured with fibre optics, J. Exp. Botany 42 (1991) 547-554.
35. [35] T.A. Day, T.C. Vogelmann, E.H. DeLucia, Are some plant life forms more effective than others in screening out ultraviolet-B radiation?, Oecologia 92 (1992) 513-519.
36. [36] E.H. DeLucia, T.A. Day, T.C. Vogelmann, Ultraviolet-B radiation and the Rocky Mountain environment: measurement of incident light and penetration into foliage, Current Topics Plant Biochem. Physiol. 10 (1991) 32-48.
37. [37] E.H. DeLucia, T.A. Day, T.C. Vogelmann, Ultraviolet-B and visible light penetration into needles of two species of subalpine conifers during foliar development, Plant, Cell Environment 15 (1992) 921-929.
38. [38] A.B. Britt, DNA damage and repair in plants, Ann. Rev. Plant Physiol. Plant Molec. Biol. 47 (1996) 75-100.
39. [39] R.M. Taylor, O. Nikaido, B.R. Jordan, J. Rosamond, C.M. Bray, A.K. Tobin, Ultraviolet-B-induced DNA lesions and their removal in wheat (Triticum aestivum L.) leaves, Plant, Cell Environment 19 (1996) 171-181.
40. [40] F.E. Quaite, B.M. Sutherland, J.C. Sutherland, Quantitation of pyrimidine dimers in DNA from UV-B-irradiated alfalfa (Medicago sativa L.) seedlings, Appl. Theor. Electrophoresis 2 (1992) 171-175.
41. [41] C.L. Ballaré, A.L. Scopel, A.E. Stapleton, M.J. Yanovsky, Solar ultraviolet-B radiation affects seedling emergence, DNA integrity, plant morphology, growth rate, and attractiveness to herbivore insects in Datura ferox, Plant Physiol. 112 (1996) 161-170.
42. [42] A.E. Stapleton, C.S. Thornber, V. Walbot, UV-B component of sunlight causes measurable damage in field-grown maize (Zea mays L): developmental and cellular heterogeneity of damage and repair. Plant, Cell Environment 20 (1997) 279-290.
43. [43] Y. Takeuchi, M. Murakami, N. Nakajima, N. Kondo, O. Nikaido, Induction and repair of damage to DNA in cucumber cotyledons irradiated with UV-B, Plant Cell Physiol. 37 (1996) 181-187.
44. [44] Y.-P. Cen, G. Weissenböck, J.F. Bomman, The effects of UV-B radiation on phenolic compounds and photosynthesis in leaves of Brassica napus, in: Physical, biochemical and physiological effects of ultraviolet radiation on Brassica napus and Phaseolus vulgaris, Ph.D. Thesis, Lund, Sweden, 1993.
45. [45] L. Liu, D.C. Gitz, J.W. McClure, Effects of UV-B on flavonoids, ferulic acid, growth and photosynthesis in barley primary leaves, Physiologia Plantarum 93 (1995) 725-733.
46. [46] L.C. Olsson, M. Veit, G. Weissenböck, J.F. Bornman, Differential flavonoid response to enhanced UV-B radiation in Brassica napus, Phytochemistry (1998) in press.
47. [47] K. Bender, C. Blattner, A. Knebel, M. Lordanov, P. Herrlich, H.J. Rahmsdorf, UV-induced signal transduction, J. Photochem. Photobiol. B: Biol. 37 (1997) 1-17.
48. [48] S.A.-H. Mackerness, S.L. Surplus, B.R. Jordan, B. Thomas, Effects of supplementary ultraviolet-B radiation on photosynthetic transcripts at different stages of leaf development and light levels in pea (Pisum sativum L.): role of active oxygen species and antioxidant enzymes, Photochem. Photobiol. 68 (1998) 88-96.
49. [49] G.I. Jenkins, G. Fuglevand, J.M. Christie, UV-B perception and signal transduction, in: P. Lumsden (Ed.), Plants and UV-B: Responses to Environmental Change, Cambridge University Press, Cambridge, 1997, pp. 135-156.
50. [50] J. Ros, M. Tevini, UV-radiation and indole-3-acetic acid: interactions during growth of seedlings and hypococyl segments of sunflower, J. Plant Physiol. 146 (1995) 295-305.
51. [51] S. Huang, Q. Dai, S. Peng, A.Q. Chavez, M.L.L. Miranda, R.M. Visperas, B.S. Vergara, Influence of supplemental ultraviolet-B on indoleacetic acid and calmodulin in the leaves of rice (Oryza sativa L.), Plant Growth Regulation 21 (1997) 59-64.
52. 2 flux and polyamines in cv. doyenne d'hiver pear shoots grown in vitro, Physiologia Plantarum 87 (1993) 109-117.
53. [53] S. Madronich, R.L. McKenzie, L.O. Björn, M.M. Caldwell, Changes in biologically active ultraviolet rediation reaching the Earth's surface, J. Photochem. Photobiol. B: Biol. 46 (1998) 5-19.
54. [54] R.B. Setlow, The wavelengths in sunlight effective in producing skin cancer: a theoretical analysis, Proc. Natl. Acad. Sci. USA 71 (1974) 3363-3366.
55. [55] F.E. Quaite, B.M. Sutherland, J.C. Sutherland, Action spectrum for DNA damage in alfalfa lowers predicted impact of ozone depletion, Nature 358 (1992) 576-578.
56. [56] M.M. Caldwell, Solar ultraviolet radiation and the growth and development of higher plants, in: A.C. Giese (Ed.), Photophysiology, vol. 6, Academic Press, New York, 1971, pp. 131-177.
57. [57] Y.-P. Cen, L.O. Björn, Action spectra for ultraweak luminescence by ultraviolet radiation (270-340 nm) in leaves of Brassica napus, J. Photochem. Photobiol. B: Biol. 22 (1994) 125-129.
58. [58] A.E.S. Green, K.R. Cross, L.A. Smith, Improved analytic characterization of ultraviolet skylight, Photochem. Photobiol. 31 (1980) 59-65.
59. [59] M.M. Caldwell, L.B. Camp, C.W. Warner, S.D. Flint, Action spectra and their key role in assessing biological consequences of solar UV-B radiation change, in: R.C. Worrest, M.M. Caldwell (Eds.). Stratospheric Ozone Reduction, Solar Ultraviolet Radiation and Plant Life, Springer, Berlin, 1986, pp. 87-111.
60. [60] D. Steinmüller, On the effect of ultraviolet radiation (UV-B) on leaf surface structure and on the mode of action of cuticular lipid biosynthesis in some crop plants, Karlsruher Beiträge zur Entwick-lungs- und Ökophysiologie der Plantzen 6 (1986) 1-174.
61. [61] S.D. Hint, M.M. Caldwell, Scaling plant ultraviolet spectral responses from laboratory action spectra to field spectral weighting factors, J. Plant Physiol. 148 (1996) 107-114.
62. [62] M.M. Caldwell, S.D. Flint, Uses of biological spectral weighting functions and the need for scaling for the ozone reduction problem, Plant Ecology 128 (1997) 66-76.
63. [63] U. Johanson, C. Gehrke, L.O. Björn, T.V. Callaghan, M. Sonesson, The effects of enhanced UV-B radiation on a subarctic heath system, Ambio 24 (1995) 106-111.
64. [64] R. Mepsted, N.D. Paul, J. Stephen, J.E. Corlett, S. Nogués, N.R. Jones, P.G. Ayres, Effects of enhanced UV-B radiation on pea (Pisum sativum L.) grown under field conditions in the UK, Global Change Biology 2 (1996) 325-334.
65. [65] M.M. Caldwell, S.D. Flint, P.S. Searles, Spectral balance and UV-B sensitivity of soybean: a field experiment, Plant, Cell Environment 17 (1994) 267-276.
66. [66] E.L. Fiscus, F.L. Booker, Is increased UV-B a threat to crop photosynthesis and productivity?, Photosynth. Res. 43 (1995) 81-92.
67. [67] M. Tevini, U. Mark, M. Saile, Plant experiments in growth chambers illuminated with natural sunlight, in: H.D. Payer, T. Pfirrman, P. Mathy (Eds.), Environmental Research with Plants in Closed Chambers, Air Pollution Research Report 26, Commission of the European Communities, Belgium, 1990, pp. 240-251.
68. 2 on growth and physiology of sunflower and maize seedlings, Plant Ecology 128 (1997) 224-234.
69. [69] P.S. Searles, M.M. Caldwell, K. Winter, Response of five tropical dicotyledon species to natural solar ultraviolet-B radiation, Amer. J. Botany 82 (1995) 445-453.
70. [70] U. Mark, M. Saile-Mark, M. Tevini, Effects of solar UVB radiation on growth, flowering and yield of central and southern European maize cultivars (Zea mays L.), Photochem. Photobiol. 64 (1996) 457-463.
71. [71] M. Saile-Mark, M. Tevini, Effects of solar UV-B radiation on growth, flowering and yield of central and southern European bush bean cultivars (Phaseolus vulgaris L.), Plant Ecology 128 (1997) 114-125.
72. [72] A.H. Teramura, J.H. Sullivan, J. Lydon, Effects of UV-B radiation on soybean yield and seed quality: a six-year field study, Physiologia Plantarum 80 (1990) 5-11.
73. [73] Q.J. Dai, V.P. Coronel, B.S. Vergara, P.W. Barnes, A.T. Quintos, Ultraviolet-B radiation effects on growth and physiology of four rice cultivars, Crop Sci. 32 (1992) 1269-1274.
74. [74] Q. Dai, S. Peng, A.Q. Chavez, M.L.L. Miranda, B.S. Vergara, D.M. Olszyk, Supplemental ultraviolet-B radiation does not reduce growth or grain yield in rice, Agronomy J. 89 (1997) 793-799.
75. [75] G. Kulandaivelu, K. Lingakumar, A. Premkumar, UV-B radiation, in: M.N.V. Prasad (Ed.), Plant Ecophysiology, John Wiley, New York, 1997, pp. 41-60.
76. [76] M.M. Caldwell, Solar ultraviolet radiation as an ecological factor for alpine plants, Ecological Monographs 38 (1968) 243-268.
77. [77] L.H. Ziska, A.H. Teramura, J.H. Sullivan, Physiological sensitivity of plants along an elevational gradient to UV-B radiation, Amer. J. Botany 79 (1992) 863-871.
78. [78] I. Staxén, J.F. Bornman, A morphological and cytological study of Petunia hybrida exposed to UV-B radiation, Physiologia Plantarum 91 (1994) 735-740.
79. [79] C.F. Musil, Differential effects of elevated ultraviolet-B radiation on the photochemical and reproductive performances of dicotyledonous and monocotyledonous arid-environment ephemerals, Plant, Cell Environment 18 (1995) 844-854.
80. [80] R. Klaper, S. Frankel, M.R. Berenbaum, Anthocyanin content and UVB sensitivity in Brassica rapa, Photochem. Photobiol. 63 (1996) 811-813.
81. [81] S.D. Flint, M.M. Caldwell, Influence of floral optical properties on the ultraviolet radiation environment of pollen, Amer. J. Botany 70 (1983) 1416-1419.
82. [82] T.A. Day, S.M. Demchik, Influence of enhanced UV-B radiation on biomass allocation and pigment concentrations in leaves and reproductive structures of greenhouse-grown Brassica rapa, Vegetatio 127 (1996) 109-116.
83. [83] S.D. Flint, M.M. Caldwell, Partial inhibition of in vitro pollen germination by simulated solar ultraviolet-B radiation, Ecology 65 (1984) 792-795.
84. [84] J. Torabinejad, M.M. Caldwell, S.D. Flint, S. Durham, Susceptibility of pollen to UV-B radiation: an assay of 34 taxa, Amer. J. Botany 85 (1998) 360-369.
85. [85] C.F. Musil, Accumulated effect of elevated ultraviolet-B radiation over multiple generations of the arid-environment annual Dimorphotheca sinuata DC. (Asteraceae), Plant, Cell Environment 19 (1996) 1017-1027.
86. 2 and nutrient supply. Global Change Biology, 1998, in press.
87. [87] P.W. Barnes, P.W. Jordan, W.G. Gold, S.D. Flint, M.M. Caldwell, Competition, morphology and canopy structure in wheat (Triticum aestivum L.) and wild oat (Avena fatua L.) exposed to enhanced ultravtolet-B radiation, Functional Ecology 2 (1988) 319-330.
88. [88] P.W. Barnes, S.D. Flint, M.M. Caldwell, Early-season effects of supplemented solar UV-B radiation on seedling emergence, canopy structure, simulated stand photosynthesis and competition for light, Global Change Biology 1 (1995) 43-53.
89. [89] C. Mazza, J. Zavala, A. Scopel, C.L. Ballaré, Perception of solar ultraviolet-B radiation by photophagous insects: mechanisms and ecosystem implications, Proc. Natl. Acad. Sci. USA, 1998, in press.
90. [90] M.C. Rousseaux, C.L. Ballaré, A.L. Scopel, P.S. Searles, M.M. Caldwell, Solar ultraviolet-B radiation affects plant-insect interactions in a natural ecosystem of Tierra del Fuego (southern Argentina), Oecologia, 1998, in press.
91. [91] D.T. Salt, S.A. Moody, J.B. Whittaker, N.D. Paul, Effects of enhanced UVB on populations of the phloem feeding insect Strophingia ericae (Homoptera: Psylloidea) on heather (Calluna vulgaris), Global Change Biology 4 (1998) 91-96.
92. [92] P.E. Hatcher, N.D. Paul, The effect of elevated UV-B radiation on herbivory of pea by Autographa gamma, Entomolog. Exp. Appl. 71 (1994) 227-233.
93. [93] M. Yazawa, T. Shimizu, T. Hirao, Feeding response of the silkworm. Bombyx mori, to UV irradiation of mulberry leaves, J. Chem. Ecology 18 (1992) 561-569.
94. [94] E.S. McCloud, M.R. Berenbaum, Stratospheric ozone depletion and plant-insect interactions: effects of UVB radiation on foliage quality of Citrus jambhiri for Trichoplusia ni, J. Chem. Ecology 20 (1994) 525-539.
95. [95] N. Buck, T. V. Callaghan, The direct and indirect effects of enhanced UV-B on the moth caterpillar Epirrita autumnata, Ecological Bulletins, submitted for publication.
96. [96] A.B. Orth, A.H. Teramura, H.D. Sisler, Effects of ultraviolet-B radiation on fungal disease development in Cucumis sativus, Amer. J. Botany 77 (1990) 1188-1192.
97. [97] T.S. Gunasekera, N.D. Paul, P.G. Ayres, The effects of ultraviolet-B (UV-B: 290-320 nm) radiation on blister blight disease of tea (Camellia sinensis), Plant Pathology 46 (1997) 179-185.
98. [98] J.N. Klironomos, M.F. Allen, UV-B-mediated changes in below-ground communities associated with the roots of Acer saccharum, Functional Ecology 9 (1995) 923-930.
99. [99] K.K. Newsham, M.N.R. Low, A.R. McLeod, P.D. Greenslade, B.A. Emmett, Ultraviolet-B radiation influences the abundance and distribution of phylloplane fungi on pedunculate oak (Quercus robur), New Phytologist 136 (1997) 287-297.
100. [100] G. Deckmyn, C. Martens, I. Impens, The importance of the ratio UV-B/photosynthetic active radiation (PAR) during leaf development as determining factor of plant sensitivity to increased UV-B irradiance: effects on growth, gas exchange and pigmentation of bean plants (Phaseolus vulgaris cv Label), Plant, Cell Environment 17 (1994) 295-301.
101. [101] G. Deckmyn, I. Impens, The ratio UV-B photosynthetically active radiation (PAR) determines the sensitivity of rye to increased UV-B radiation, Environment. Exp. Botany 37 (1997) 3-12.
102. [102] J. Bordewijk, H. Slaper, H.A.J.M. Reinen, E. Schlamann, Total solar radiation and the influence of clouds and aerosols on the biologically effective UV, Geophys. Res. Lett. 22 (1995) 2151-2154.
103. [103] J.H. Sullivan, A.H. Teramura, Field study of the interaction between solar ultraviolet-B radiation and drought on photosynthesis and growth in soybean, Plant Physiol. 92 (1990) 141-146.
104. [104] Y. Petropoulou, A. Kyparissis, D. Nikolopoulos, Y. Manetas, Enhanced UV-B radiation alleviates the adverse effects of summer drought in two Medieterranean pines under field conditions, Physiologia Plantarum 94 (1995) 37-44.
105. [105] Y. Manetas, Y. Petropoulou, K. Stamatakis, D. Nikolopoulos, E. Levizou, G. Psaras, G. Karabournioutis, Beneficial effects of enhanced UV-B under field conditions: improvement of needle water relations and surviving capacity of Pinus pinea L. seedlings during the dry Mediterranean summer, Plant Ecology 128 (1997) 100-108.
106. [106] C. Gehrke, Impacts of enhanced ultraviolet-B radiation on mosses with contrasting morphology and growth patterns in a subarctic heath ecosystem, Ecology, 1998, in press.
107. [107] J.F.B. Mitchell, S. Mananbe, V. Meleshko, T. Tokioka, Equilibrium climate change and its implications for the future, in: J.T. Houghton, G.J. Jenkins, J.J. Ephraums (Eds.), Climate Change. The IPCC Scientific Assessment, Cambridge University Press, Cambridge, 1990.
108. [108] D. Gwynn-Jones, J.A. Lee, T.V. Callaghan, Effects of enhanced UV-B radiation and elevated carbon dioxide concentrations on a sub-arctic forest heath ecosystem, Plant Ecology 128 (1997) 242-249.
109. [109] L.O. Björn, T.V. Callaghan, I. Johnsen, J.A. Lee, Y. Manetas, N.D. Paul, M. Sonesson, A.R. Wellburn, D. Coop, H.S. Heide-Jørgensen, C. Gehrke, D. Gwynn-Jones, U. Johanson, A. Kyparissis, E. Levizou, D. Nikolopoulos, Y. Petropoulou, M. Stephanou, The effects of UV-B radiation on European heathland species, Plant Ecology 128 (1997) 252-264.
110. [110] N.S. Murali, A.H. Teramura, Effects of ultraviolet-B irradiance on soybean. VII. Biomass and concentration and uptake of nutrients at varying P supply, J. Plant Nutrition 8 (1985) 177-192.
111. [111] J. Ros, Synergistic and/or antagonistic effects of enhanced (reduced) UV-B radiation (artificial, solar) at various nitrogen levels in crop plants, in: H. Bauer, C. Nolan (Eds.), 1st Eur. Symp. Effects of Environmental UV-B Radiation, Brussels and Luxembourg, 1995, pp. 245-252.
112. [112] C.F. Musil, S.J.E. Wand, Differential stimulation of an arid-environment winter ephemeral Dimorphotheca pluvialis (L.) Moench by ultraviolet-B radiation under nutrient limitation, Plant, Cell Environment 17 (1994) 245-255.
113. 2+ on chlorophyll fluorescence, growth and nutrient content in Brassica napus, J. Exp. Botany 49 (1998) 1031-1039.
114. [114] S.L. Dubé, J.F. Bornman, Response of spruce seedlings to simultaneous exposure to ultraviolet-B radiation and cadmium, Plant Physiol. Biochem. 30 (1992) 761-767.
115. [115] J.E. Miller, F.L. Booker, E.L. Fiscus, A.S. Heagle, W.A. Pursley, S.F. Vozzo, W.W. Heck, Ultraviolet-B radiation and ozone effects on growth, yield, and photosynthesis of soybean, J. Environmental Quality 23 (1994) 83-91.
116. [116] M. Thalmair, G. Bauw, S. Thiel, T. Döhring, C. Langebartels, H. Sandermann, Ozone and ultraviolet-B effects on the defense-related proteins B-1,3-glucanase and chitinase in tobacco, J. Plant Physiol. 148 (1996) 222-228.
117. [117] A.H. Teramura, N.S. Murali, Intraspecific differences in growth and yield of soybean exposed to ultraviolet-B radiation under greenhouse and field conditions, Environment. Exp. Botany 26 (1986) 89-95.
118. [118] T.R. Sinclair, O. N'Diaye, R.H. Biggs, Growth and yield of field-grown soybean in response to enhanced exposure to ultraviolet-B radiation, J. Environmental Quality 19 (1990) 478-481.
119. [119] S.J. D'Sumey, T.J. Tschaptinski, N.T. Edwards, L.R. Shugart, Biological responses of two soybean cultivars exposed to enhanced UV-B radiation, Environment. Exp. Botany 33 (1993) 347-356.
120. [120] I. Nouchi, K. Kobayashi, H.Y. Kim, Effects of enhanced UV-B radiation on growth and yield of rice in the field, J. Agric. Meteorol. 52 (1997) 867-870.
121. [121] D. Olszyk, Q. Dai, P. Teng, H. Leung, Y. Luo, S. Peng, UV-B effects on crops: response of the irrigated rice ecosystem, J. Plant Physiol. 148 (1996) 26-34.
122. [122] J.K. Conner, L.A. Zaingori, A garden study of the effects of ultraviolet-B radiation on pollination success and lifetime female fitness in Brassica, Oecologia 111 (1997) 388-395.
123. [123] J.H. Sullivan, A.H. Teramura, The effects of ultraviolet-B radiation on loblolly pine. 2. Growth of field-grown seedlings, Trees 6 (1992) 115-120.
124. [124] L.R. Dillenburg, J.H. Sullivan, A.H. Teramura, Leaf expansion and development of photosynthetic capacity and pigments in Liquid-ambar styraciflua - effects of UV-B radiation, Amer. J. Botany 82 (1995) 878-885.
125. [125] J.H. Sullivan, B.W. Howells, C.T. Ruhland, T.A. Day, Changes in leaf expansion and epidermal screening effectiveness in Liquid-ambar styraciflua and Pinus taeda in response to UV-B radiation, Physiologia Plantarum 98 (1996) 349-357.
126. [126] L. Liu, J.W. McClure, Effects of UV-B on activities of enzymes of secondary phenolic metabolism in barley primary leaves, Physiologia Plantarum 93 (1995) 734-739.
127. [127] P.S. Searles, S.D. Flint, S.B. Diaz, M.C. Rousseaux, C.L. Ballaré, M.M. Caldwell, Solar ultraviolet-B radiation influence on Sphagnum bog and Carex fen ecosystems: first field season findings in Tierra del Fuego, Argentina, Global Change Biology, 1998, in press.