The impact of high temperatures on Vitis vinifera cv. Semillon grapevine performance and berry ripening

Frontiers in Plant Science
Dennis H Greer, Mark M Weedon

Abstract

The heat event that occurred in many parts of Australia in 2009 was the worst on record for the past decade, with air temperatures exceeding 40(°)C for 14 days. Our aim was to assess the impacts of this heat event on vine performance, including ripening, yield, and gas exchange of Vitis vinifera cv. Semillon grown in a Riverina vineyard. To assess the affect of high temperatures on Semillon grapevines, the vines were covered with a protective layer to reduce radiant heating and were compared with vines exposed to ambient conditions. The heat event had major effects on ripening; reducing the rate of ripening by 50% and delaying harvest ripeness and causing a high incidence of berry shrivel and sunburn. Yield was not affected. Photosynthesis was reduced 35% by the heat event while transpiration increased nearly threefold and was accounted for by increased stomatal conductance. The conclusion of this study was that heat events delayed ripening in Semillon berries and caused a significant reduction in berry quality. Strategies to minimize the radiant load during heat events are required and this study has confirmed a protective layer can reduce canopy temperatures and enhance berry quality.

Citations

Feb 2, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Joanna M GambettaDavid W Jeffery
Jan 24, 2019·Plant, Cell & Environment·Noam ReshefNurit Agam
Jun 22, 2017·Frontiers in Plant Science·Chiara PastoreGiovanni Battista Tornielli
Feb 26, 2019·Planta·A SongyF Fontaine
Dec 6, 2019·Frontiers in Plant Science·Elizabeth M DemmingsJason P Londo
Nov 27, 2020·Frontiers in Plant Science·Johann Martínez-LüscherSahap Kaan Kurtural
Dec 17, 2020·Plants·Xenophon VeniosGeorgios Banilas
Feb 17, 2017·Heliyon·Jungmin Lee
Jan 25, 2018·Plant Science : an International Journal of Experimental Plant Biology·Marta ArrizabalagaInmaculada Pascual
Apr 9, 2021·Frontiers in Plant Science·Markus RienthSimone Diego Castellarin

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