Modelling leaf photosynthetic and transpiration temperature-dependent responses in Vitis vinifera cv. Semillon grapevines growing in hot, irrigated vineyard conditions.

AoB Plants
Dennis H Greer

Abstract

Grapevines growing in Australia are often exposed to very high temperatures and the question of how the gas exchange processes adjust to these conditions is not well understood. The aim was to develop a model of photosynthesis and transpiration in relation to temperature to quantify the impact of the growing conditions on vine performance. Leaf gas exchange was measured along the grapevine shoots in accordance with their growth and development over several growing seasons. Using a general linear statistical modelling approach, photosynthesis and transpiration were modelled against leaf temperature separated into bands and the model parameters and coefficients applied to independent datasets to validate the model. Photosynthesis, transpiration and stomatal conductance varied along the shoot, with early emerging leaves having the highest rates, but these declined as later emerging leaves increased their gas exchange capacities in accordance with development. The general linear modelling approach applied to these data revealed that photosynthesis at each temperature was additively dependent on stomatal conductance, internal CO(2) concentration and photon flux density. The temperature-dependent coefficients for these parameters app...Continue Reading

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Citations

May 17, 2018·Frontiers in Plant Science·Antoine BigardLaurent Torregrosa
Oct 20, 2020·Frontiers in Plant Science·Antoine BigardLaurent Torregrosa
Dec 17, 2020·Plants·Xenophon VeniosGeorgios Banilas
Nov 17, 2017·Journal of Agricultural and Food Chemistry·Johann Martínez-LüscherSahap Kaan Kurtural

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