Foteini Kolyva*(1), Stratakis E. (2), Meletiou-Christou M.S. (1), Rhizopoulou S. (1)
(1) Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens,Panepistimiopolis, 15784 Athens, (2) IESL, FORTH, Heraklio, Crete
*fotinikoliva@biol.uoa.gr
The impact of climatic change in viticulture is expected to be severe in the Mediterranean area in the future [1, 2]. The scope of this study is the evaluation of the leaf functional and optical properties of grapevine (Vitis vinifera L.) cultivar (cv.) Assyrtiko and its response to abiotic stress conditions (temperature and water deficiency) caused by climatic change. Plants of grapevine cv. Assyrtiko were placed in a growth chamber in the Botany Department of the National and Kapodistrian University of Athens, Greece and four treatments were applied; temperature (ambient versus ambient +2oC) and water availability (full irrigation versus cyclic drought). The accumulation of photosynthetic pigments (chlorophylls a and b and carotenoids) was determined as well as the leaf area, dry weight and specific leaf area in expanding and fully expanded leaves of the treated plants. Using a UV/VIS spectrophotometer (Perkin Elmer Lambda-950), equipped with an integrating sphere [3], the reflectance (R) and the transmittance (T), between 250 and 2500 nm wavelength [4,5] were measured in situ, for both adaxial and abaxial leaf surfaces of the grapevine var. Assyrtiko. Assessing the above data was found that combined drought with elevated temperature, reduces chlorophyll accumulation. The selected data along with the parameters of the abiotic environment, were tested for model simulation purposes that will help the mitigation of the impact of climatic change on the (Vitis vinifera L.) cultivar (cv.) Assyrtiko in Greece.
[1] Gauquelin T, et al. Regional Environmental Change 18(3), 623-636 (2018)
[2] Del Pozo A, et al. Sustainability 11(10), 2769 (2019)
[3] Stratakis E, et al. Progress in Quantum Electronics 33(5), 127-163 (2009)
[4] Jacquemoud S, et al. Remote Sensing of Environment 56(3), 194-202 (1996)
[5] Jacquemoud S, Ustin S. Leaf optical properties. Cambridge University Press (2019)
