Can Young Olive Plants Overcome Heat Shock?
Climate change is bringing more frequent and intense heat waves over the last years. Under this circumstance, it is important to understand whether species can tolerate stress and which mechanisms are involved in this adaptation process. Olive tree (Olea europaea L.) have been known for centuries to be drought tolerant, but less is known about the impact on the physiological response of this species to heat. To understand how young olive plants deal with heat shock, one-year-old plants (cv. ‘Arbequina’), grown at 23 ± 2 °C, were exposed to heat, 40 °C, for 2 h. Relative water content, gas exchange, carbohydrates content, cell membrane permeability and lipid peroxidation were assessed immediately after heat exposure. The heat shock treatment compromised plant water status, photosynthesis and induced stomatal closure. However, neither membrane damage nor carbohydrates contents (total soluble sugars and starch) were affected. The results indicate that young olive plants can overcome short heat shock episodes.
KeywordsClimate change Olea europaea L. Photosynthesis Abiotic stress
This work was supported by Portuguese Foundation for Science and Technology (FCT) through a doctoral fellowship of Márcia Araújo (SFRH/BD/116801/2016) and a post-doctoral fellowship of Maria Celeste Dias (SFRH/BPD/100865/2014). This work was financed by FCT/MEC through national funds and the co-funding by the FEDER, within the PT2020 Partnership Agreement, and COMPETE 2010, within the projects UID/BIA/04004/2013, UID/QUI/00062/2013 and UID/AGR/04033/2013.
- Araújo, M., et al. (2016). Plasticity of young Moringa oleifera L. plants to face water deficit and UVB radiation challenges. Journal of Photochemistry and Photobiology B: Biology, 162, 278–285. Available at: http://linkinghub.elsevier.com/retrieve/pii/S1011134416302251.
- Assab, E., et al. (2011). Heat shock response in olive (Olea europaea L.) twigs: Identification and analysis of a cDNA coding a class I small heat shock protein. Plant Biosystems, 145 (March 2016), 419–425 ST–Heat shock response in olive (Olea e).Google Scholar
- Bacelar, E. A., Moutinho-Pereira, J. M., et al. (2007a). Changes in growth, gas exchange, xylem hydraulic properties and water use efficiency of three olive cultivars under contrasting water availability regimes. Environmental and Experimental Botany, 60(2), 183–192. Available at: http://linkinghub.elsevier.com/retrieve/pii/S0098847206001250.
- Bacelar, E. A., Santos, D. L., et al. (2007b). Physiological behaviour, oxidative damage and antioxidative protection of olive trees grown under different irrigation regimes. Plant and Soil, 292(1–2), 1–12. Available at: http://link.springer.com/10.1007/s11104-006-9088-1.
- Bita, C. E., & Gerats, T. (2013). Plant tolerance to high temperature in a changing environment: Scientific fundamentals and production of heat stress-tolerant crops. Frontiers in Plant Science, 4(July), 1–18. Available at: https://www.frontiersin.org/articles/10.3389/fpls.2013.00273/full.
- Brestic, M., et al. (2013). Heat signaling and stress responses in photosynthesis. In K. R. Hakeem, R. Rehman, & I. Tahir, eds. Plant signaling: Understanding the molecular crosstalk (pp. 241–256). Springer.Google Scholar
- Carr, M. K. V. (2013). The water relations and irrigation requirements of olive (Olea europaea L.): A review. Experimental Agriculture, 49(4), 597–639. Available at: http://dx.doi.org/10.1017/S0014479713000276.
- Dias, M. C., Azevedo, C., et al. (2014a). Melia azedarach plants show tolerance properties to water shortage treatment: An ecophysiological study. Plant physiology and biochemistry, 75, 123–127. Available at: http://www.ncbi.nlm.nih.gov/pubmed/24440555.
- Dias, M. C., Oliveira, H., et al. (2014b). Improving elms performance under drought stress: The pretreatment with abscisic acid. Environmental and Experimental Botany, 100, 64–73. Available at: http://linkinghub.elsevier.com/retrieve/pii/S0098847213002244.
- Feki, K., Saibi, W., & Brini, F. (2015). Understanding Plant Stress Response and Tolerance to Salinity from Gene to Whole Plant. Managing Salt Tolerance in Plants, (May 2016), 1–18. Available at: http://www.crcnetbase.com/doi/10.1201/b19246-2.
- Galán, C., et al. (2001). The role of temperature in the onset of the Olea europaea L. pollen season in southwestern Spain. International Journal of Biometeorology, 45(1), 8–12.Google Scholar
- Hodges, D. M. et al., (1999). Improving the thiobarbituric acid-reactive-substances assay for estimating lipid peroxidation in plant tissues containing anthocyanin and other interfering compounds. Planta, 207(4), 604–611. Available at: http://link.springer.com/10.1007/s004250050524.
- IPCC. (2014). Climate change 2014 impacts, adaptation, and vulnerability. Part A: Global and Sectoral Aspects. In C. B. Field et al., (Eds.), Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press. Available at: http://ebooks.cambridge.org/ref/id/CBO9781107415379.
- Irigoyen, J. J., Emerich, D. W., & Sanchezdiaz, M. (1992). Water-stress induced changes in concentrations of proline and total soluble sugars in Nodulated Alfalfa (Medicago sativa) Plants. Physiologia Plantarum, 84(1), 55–60.Google Scholar
- Koubouris, G. C., Metzidakis, I. T., & Vasilakakis, M. D. (2009). Impact of temperature on olive (Olea europaea L.) pollen performance in relation to relative humidity and genotype. Environmental and Experimental Botany, 67, 209–214.Google Scholar
- McLoughlin, F., et al. (2016). Class I and II small heat-shock proteins protect protein translation factors during heat stress. Plant Physiology, 172(October), 00536.2016. Available at: http://www.plantphysiol.org/lookup/doi/10.1104/pp.16.00536.
- Mittler, R. et al. (2011). ROS signaling: The new wave? Trends in Plant Science, 16(6), 300–309. Available at: http://dx.doi.org/10.1016/j.tplants.2011.03.007.
- Rigueiro-Rodríguez, A., McAdam, J. & Mosquera-Losada, M. R. (Eds.). (2009). Agroforestry in Europe: Current status and future prospects, Springer Science + Business Media B. V.Google Scholar
- Tripepi, M., Pöhlschroder, M., & Bitonti, M. B. (2011). Diversity of dehydrins in Olea europaea plants exposed to stress. The Open Plant Science Journal, 5, 9–13.Google Scholar