Shade Nets Improve Gas Exchange and Chlorophyll Fluorescence in Young Avocado Trees Grown Under Mediterranean Conditions

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Publicado en:Plants vol. 14, no. 23 (2025), p. 3550-3568
Autor principal: Tasa, Maria
Otros Autores: Badal, Eduardo, Bonet, Luis, Martínez-Gimeno, María Amparo, Pérez-Pérez, Juan Gabriel
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MDPI AG
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024 7 |a 10.3390/plants14233550  |2 doi 
035 |a 3280959558 
045 2 |b d20250101  |b d20251231 
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100 1 |a Tasa, Maria  |u Centro para el Desarrollo de la Agricultura Sostenible, Instituto Valenciano de Investigaciones Agrarias (CDAS-IVIA), CV-315, km 10.7, 46113 Moncada, Valencia, Spain; tasa_marcana@gva.es 
245 1 |a Shade Nets Improve Gas Exchange and Chlorophyll Fluorescence in Young Avocado Trees Grown Under Mediterranean Conditions 
260 |b MDPI AG  |c 2025 
513 |a Journal Article 
520 3 |a Avocado trees (Persea americana Mill.) grown in Mediterranean conditions are exposed to high temperatures and intense solar radiation during summer, factors that can severely compromise plant water status and key physiological processes. To minimize these stressful conditions, the use of shade nets is an agronomical technique that permits the creation of an optimal microclimate for crop development. Thus, the aim was to evaluate the effects of shade netting on the physiological response of young avocado trees commercially grown under Mediterranean climatic conditions. The main results showed similar circadian rhythms of plant water status under both crop systems (open-air and shaded) in both seasons. However, the use of shading nets altered the circadian rhythm of leaf gas exchange. In summer, stomatal conductance (gs) remained significantly more open after midday in shaded trees, allowing higher leaf transpiration (Eleaf) and cooler leaf temperature (Tleaf). A similar daily pattern was observed in chlorophyll a fluorescence parameters, including the effective quantum yield of photosystem II (ΦPSII) and the electron transport rate (ETR), with the lowest values occurring at midday. In shaded plants, ΦPSII and ETR remained higher after midday than in open-air, suggesting a lower photochemical inhibition of photosynthesis caused by heat stress and photoinhibition. Thus, the use of shade nets represents an agronomic alternative technique for cultivating avocados in Mediterranean climate conditions. 
653 |a Physiology 
653 |a Photoinhibition 
653 |a Summer 
653 |a Photosystem II 
653 |a Crop development 
653 |a Electron transport 
653 |a Heat stress 
653 |a Water 
653 |a Gas exchange 
653 |a Heat 
653 |a Microclimate 
653 |a Photochemicals 
653 |a Chlorophyll 
653 |a Radiation 
653 |a Efficiency 
653 |a Oxidative stress 
653 |a Stomatal conductance 
653 |a Solar radiation 
653 |a Climatic conditions 
653 |a Fluorescence 
653 |a Agronomy 
653 |a Transpiration 
653 |a Shading 
653 |a Trees 
653 |a Circadian rhythms 
653 |a High temperature 
653 |a Leaves 
653 |a Salinity 
653 |a Humidity 
653 |a Fruit trees 
653 |a Avocados 
653 |a Physiological effects 
653 |a Photosynthesis 
653 |a Plants (botany) 
653 |a Nets 
653 |a Environmental conditions 
653 |a Temperature 
653 |a Stomata 
653 |a Netting (materials/structures) 
653 |a Heat tolerance 
653 |a Autumn 
653 |a Transport rate 
653 |a Shade 
653 |a Cultivation techniques 
700 1 |a Badal, Eduardo  |u Servicio de Tecnología del Riego, IVIA (STR-IVIA), CV-315, km 10.7, 46113 Moncada, Valencia, Spainmartinez_margimb@gva.es (M.A.M.-G.) 
700 1 |a Bonet, Luis  |u Servicio de Tecnología del Riego, IVIA (STR-IVIA), CV-315, km 10.7, 46113 Moncada, Valencia, Spainmartinez_margimb@gva.es (M.A.M.-G.) 
700 1 |a Martínez-Gimeno, María Amparo  |u Servicio de Tecnología del Riego, IVIA (STR-IVIA), CV-315, km 10.7, 46113 Moncada, Valencia, Spainmartinez_margimb@gva.es (M.A.M.-G.) 
700 1 |a Pérez-Pérez, Juan Gabriel  |u Centro para el Desarrollo de la Agricultura Sostenible, Instituto Valenciano de Investigaciones Agrarias (CDAS-IVIA), CV-315, km 10.7, 46113 Moncada, Valencia, Spain; tasa_marcana@gva.es 
773 0 |t Plants  |g vol. 14, no. 23 (2025), p. 3550-3568 
786 0 |d ProQuest  |t Agriculture Science Database 
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