首页|Fig (Ficus carica L.) vulnerability to climate change: Combined effects of water stress and high temperature on ecophysiological behaviour of different cultivars
Fig (Ficus carica L.) vulnerability to climate change: Combined effects of water stress and high temperature on ecophysiological behaviour of different cultivars
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NSTL
Elsevier
? 2022 SAABClimate change scenarios predict that drought and high temperatures will become the main stress factors affecting fruit tree's production. This study was undertaken in order to evaluate ecophysiological behaviour of young fig plants of cultivars Zidi and Bither Abiadh under two water regimes (‘T50’ and ‘T100’, supply of respectively 50% and 100% of water requirement) in different growing conditions (open-air, tunnel covered with insect proof and polyethylene greenhouse). During the first cycle of measurements, it has been concluded that the decrease of stomatal conductance was the primary response to water stress, which controlled transpiration and photosynthesis rates and regulated leaf temperature. Fig cultivars reduced leaf stomatal conductance after 7 days of changing environments and reducing irrigation to 50% of required water supply. Measurements carried out after 15 days showed a decrease of photosynthetic parameters even for fig plants irrigated with 100% of their water requirement, due to the effect of high temperatures associated with low air humidity in the different growing conditions. During the second cycle, measurements carried out on persistent leaves showed that fig cultivars were adapted to prolonged water stress. Overall, Zidi and Bither Abiadh responded almost similarly to water stress and exhibited the same ecophysiological behaviour in each growing condition during the first and the second cycle of measurements. Despite leaf abscission, fig plants revealed drought stress memorizing by showing a rapid growth recovery once the stress was relieved.
Research Laboratory on Agrobiodiversity & Ecotoxicology (LR21AGR02) Higher Agronomic Institute IRESA University of Sousse
Research Laboratory on Production & Protection for Sustainable Horticulture (LR21AGR03) Regional Research Centre on Horticulture and Organic Agriculture IRESA University of Sousse
Research Unit on Conservation and Valorization of Plant Resources (UR13AGR07) Higher Agronomic Institute IRESA University of Sousse
NSTL
Elsevier
