Interactive Effects of Increased UV-B and Rainfall on Growth and Physiology of Tibet Barley on the Tibetan Plateau

Zheng Sheng He, Shou Fa Zhan, Shi Lin Wu

Ekoloji, 2014, Issue 93, Pages: 18-26

DOI: https://doi.org/10.5053/ekoloji.2014.933

OPEN ACCESS

Download Full Text (PDF)

Abstract

UV-B radiation and rainfall have tended to increase over the past decades in the Tibetan Plateau. A controlled field experiment, which simulated a 5% and 10% increase in UV-B radiation and a 10% and 20% increase in rainfall, was conducted to address the effects of enhanced UV-B radiation and increased rainfall on the leaf water potential, gas exchange, growth and biomass allocation, and phenology of Tibetan barley (Hordeum vulgare var. trifurcatum). Enhanced UV-B radiation conferred significant effects on the net photosynthetic rate (Pn), transpiration (E), stomatal conductance (gs), water use efficiency (WUE), total biomass, and spike length; the increased rainfall only affected Pn, E, and gs. These findings indicated that enhanced UV-B radiation had a more profound impact on the physiological and growth traits than the increased rainfall. Significant interactions of enhanced UV-B radiation and increased rainfall were also observed on leaf water potential, Pn, E, gs, WUE, total biomass, spike length, and relative growth rate. The leaf water potential was significantly increased with enhanced UV-B under the condition of a 20% increase in rainfall, Pn and biomass accumulation were also increased with enhanced UV-B under the conditions of increased rainfall, and the phenological stages were also delayed under ambient rainfall, but, this phenomenon disappeared gradually with an increased rainfall. It was therefore inferred that increased rainfall was able to offset the adverse impacts of enhanced UV-B radiation.

Keywords

enhanced UV-B, growth and allocation, increased rainfall, phenology, physiological traits

References

  • Allen DJ, Nogues S, Morison JIL, Greenslade PD, Mcled AR, Baker NR (1999) A Thirty Percent Increase in UV-B has no Effect on Photosynthesis in Well-Watered and Droughted Pea Plants in the Field. Global Change Biology 5: 235-244.
  • Anonymous (1984) Climate of Xizang (Tibet). Qing-Zang Plateau Integrative Surveying Team (QPIST), Science Press, Beijing. (in Chinese)
  • Anonymous (1987) Flora of China. Book 3 of Volume 9. Flora of China Editorial Board, Science Press, Beijing. (in Chinese)
  • Anonymous (1988) Vegetation of Tibet.Qing-Zang Plateau Integrative Surveying Team (QPIST), Science Press, Beijing. (in Chinese)
  • Bahar M, Bağ H, Bozkurt O (2008) Pre-Service Science Teachers' Understandings of an Environmental Issue: Ozone Layer Depletion. Ekoloji 18: 51-58.
  • Beadle CL (1993) Growth Analysis. In: Hall DO, Scurlock JMO, Bolhar-Nordentrampf HR, Leegod RC, Long SP (eds), Photosynthesis and Production in a Changing Environment, Chapman and Hall, London, 36- 46.
  • Casper BB, Forseth IN, Kempenich H, Settzer S, Xavier K (2001) Drought Prolongs Leaf Life Span in the Herbaceous Desert Perennial Cryptantha Flava. Functional Ecology 15: 740-747.
  • Chartzoulakis K, Psarras G (2005) Global Change Effects on Crop Photosynthesis and Production in Mediterranean: the Case of Crete, Greece. Agriculture Ecosystems and Environment 106: 147-157.
  • Cui XY, Gu S, Zhao XQ, Wu J, Kato T, Tang YH (2008) Diurnal and Seasonal Variations of UV Radiation on the Northern Edge of the Qinghai-Tibetan Plateau. Agricultural and Forest Meteorology 148: 144-151.
  • de la Rosa TM, Aphalo PJ, Lehto T (2003) Effects of Ultraviolet-B on Growth, Mycorrhizas, and Mineral Nutrition of Silver Birch (Betula Pendula Roth) Seedling Grown in Low-Nutrient Conditions. Global Change Biology 9: 65-73.
  • Ding YH (2002) Prediction of Environmental Change in Western China. Science Press, Beijing. (in Chinese)
  • Fan JW, Shao QQ, Liu JY, Wang JB, Harris W, Chen ZQ, Zhong HP, Xu XL, Liu RG (2010) Assessment of Effects of Climate Change and Grazing Activity on Grassland Yield in the Three Rivers Headwaters Region of Qinghai-Tibet Plateau, China. Environmental Monitoring and Assessment 170: 571-584.
  • Flint SD, Ryel RJ, Caldwell MM (2003) Ecosystem UV-B Experiments in Terrestrial Communities: A Review of Recent Findings and Methodologies. Agricultural and Forest Meteorology 120: 177-189.
  • Fox LR, Ribeiro SP, Brown VK, Masters GJ, Clarke IP (1999) Direct and Indirect Effects of Climate Change on St John's Wort, Hypericum Perforatum L. (Hypericaceae). Oecologia 120: 113-122.
  • Germ M, Breznik B, Dolinar N, Kreft I, Gaberscik A (2013) The Combined Effect of Water Limitation and UV-B Radiation on Common and Tartary Buckwheat. Cereal Research Communications 41: 97-105.
  • Gitz III DC, Liu-Gitz L, Britz SJ, Sullivan JH (2005) Ultraviolet-B Effects on Stomatal Density, Water-Use Efficiency, and Stable Carbon Isotope Discrimination in Four Glasshouse-Grown Soybean (Glyicine Max) Cultivars. Environmental and Experimental Botany 53: 343-355.
  • Gonzalez R, Mepstel R, Wellburn AR, Paul ND (1998) Non-Photosynthetic Mechanism of Growth Reduction in Pea (Pisum sativum L.) Exposed to UV-B Radiation. Plant, Cell and Environment 21: 23-32.
  • Guo S, Zhou XJ, Zhang XC (1994) Preliminary Analysis of Atmospheric Ozone Contents and Ultraviolet- B Radiation in Qing-Zang Plateau Regions. Chinese Science Bulletin 39: 50-53. (in Chinese)
  • Gwynn-Jones D, Johanson U. 1996. Growth and Pigment Concentration in Two Subarctic Grass Species under Four Different UV-B Radiation. Physiologia Plantarum 97: 701-707.
  • Hofmann RW, Campbell BD, Fountain DF (2003) Sensitivity of White Clover to UV-B Radiation Depends on Water Availability, Plant Productivity and Duration of Stress. Global Change Biology 9: 473-477.
  • Jansen MAK, Coffey AM, Prinsen E (2012) UV-B Induced Morphogenesis: Four Players or a Quartet? Plant Signaling and Behavior 7: 1185-1187.
  • Kakani VG, Reddy KR, Zhao D, Sailaja K (2003) Field Crop Responses to Ultraviolet-B Radiation: A Review. Agricultural and Forest Meteorology 120: 191-218.
  • Kang SC, Xu YW, You QL, Flügel WA, Pepin N, Yao TD (2010) Review of Climate and Cryospheric Change in the Tibetan Plateau. Environmental Research Letters 5, 015101.
  • Liu Q, Yao XQ, Zhao CZ, Cheng XY (2011) Effects of Enhanced UV-B Radiation on Growth and Photosynthetic Responses of Four Species of Seedlings in Subalpine Forests of the Eastern Tibet Plateau. Environmental and Experimental Botany 74: 151-156.
  • Liu Y, Zhong ZC, Long Y, Cao GX, Werger MJA (2003) Effects Of -NAA and UV-B Radiation on the Growth and Transpiration of Trichosanthes Kirilowii Seedling. Acta Phytoecologica Sinica 27: 454-458. (in Chinese with English Abstract)
  • Papadopoulos YA, Gordon RJ, Mcrae KB, Bush RS, Belanger G, Butler EA, Fillmore SAE, Morrision M (1999) Current and Elevated Levels of UV-B Radiation have Few Impacts on Yield of Perennial Forage Crops. Global Change Biology 5: 847-856.
  • Penuelas J, Filella I, Zhang XY, Llorens L, Ogaya R, Lloret F, Comas P, Estiarte M, Terradas J (2004) Complex Spatiotemporal Phenological Shifts as a Response to Rainfall Changes. New Phytologist 161: 837- 846.
  • Poorter H, Nagel O (2000) The Role of Biomass Allocation in the Growth Response of Plants to Different Levels of Light, CO2, Nutrients and Water: A Quantitative Review. Australian Journal of Plant Physiology 27: 595-607.
  • Prado FE, Rosa M, Prado C, Podazza G, Interdonato R, Gonzalez JA, Hilal M (2012) UV-B Radiation, its Effects and Defense Mechanisms in Terrestrial Plants. In: Ahmad P, Prasad MNV (eds), Environmental Adaptations and Stress Tolerance of Plants in the Era of Climate Change, Springer New York, 57-83.
  • Reboredo F, Lidon FJC (2012) UV-B Radiation Effects on Terrestrial Plants-A Perspective. Emirates Journal of Food and Agriculture 24: 502-509.
  • Roupsard O, Ferhi A, Granier A, Pallo F, Depommier D, Mallet B, Joly HI, Dreyer E (1999) Reverse Phenology and Dry-Season Water Uptake by Faidherbia Albida (Del.) A. Chev. in an Agroforestry Parkland of Sudanese West Africa. Functional Ecology 13: 460-472.
  • Shi SB, Zhu WY, Li HM, Zhou DW, Han F, Zhao XQ, Tang YH (2004) Photosynthesis of Saussurea Superba and Gentiana Straminea is not Reduced after Long-Term Enhancement of UV-B Radiation. Environmental and Experimental Botany 51: 75-83.
  • Sivakumar MVK, Das HP, Brunini O (2005) Impacts of Present and Future Climate Variability and Change on Agriculture and Forestry in the Arid and Semi-Arid Tropics. Climatic Change 70: 31-72.
  • Sun HL, Zheng D (1998) Formation and Development of Qing-Zang Plateau. Guangdong Science and Technology Press, Guangzhou. (in Chinese)
  • Tylianakis JM, Didham RK, Bascompte J, Wardle DA (2008) Global Change and Species Interactions in Terrestrial Ecosystems. Ecology Letters 11: 1351-1363.
  • Wargent JJ, Jordan BR (2013) From Ozone Depletion to Agriculture: Understanding the Role of UV Radiation in Sustainable Crop Production. New Phytologist 197: 1058-1076.
  • Xiao XT, Sun CQ (2003) Bibliometric Analysis of Articles on the Tibet Plateau. Advance in Earth Sciences 18: 643-652. (in Chinese with English Abstract)
  • Yang YQ, Yao YN, Xu G, Li CY (2005) Growth and Physiological Responses to Drought and Elevated Ultraviolet-B in Two Contrasting Populations of Hippophae Rhamnoides. Physiologia Plantarum 124: 431-440. Yu JQ, Kelts KR (2002) Abrupt Changes in Climatic Conditions across the Late-Glacial /Holocene Transition on the N.E. Tibet-Qinghai Plateau: Evidence from Lake Qinghai, China. Journal of Paleolimnology 28: 195-206.
  • Zaller JG, Searles PS, Caldwell MM, Flint SD, Scopel AL, Sala OE (2004) Growth Responses to Ultraviolet-B Radiation of Two Carex Species Dominating an Argentinian Fen Ecosystem. Basic and Applied Ecology 5: 153-162.
  • Zhang XS, Liu CY (1994) Prediction of Vegetation in the Tibetan Plateau under Global Change. In: Chinese National Natural Science (ed), Global Change and Ecosystem, Shanghai Science Press, Shanghai, 17-26. (in Chinese)
  • Zhou XJ, Li WL, Chen LX, Liu Y (2004) Study on Ozone Change over Tibetan Plateau. Acta Meteorologica Sinica 62: 513-527. (In Chinese with English Abstract)
  • Zhu WQ, Pan YZ, Yang XQ, Song GB (2007) Comprehensive Analysis of the Impact of Climatic Changes on Chinese Terrestrial Net Primary Productivity. Chinese Science Bulletin 52: 3253-3260.