Particle films improve photosynthesis of citrus trees under excess irradiance by reducing leaf temperature

Autor: Lucas Giovani Bernardi, Rodrigo Marcelli Boaretto, Gabriel Constantino Blain, Dirceu Mattos Jr.
Rok vydání: 2023
Předmět:
Zdroj: Physiologia Plantarum. 175
ISSN: 1399-3054
0031-9317
DOI: 10.1111/ppl.13844
Popis: High irradiance and increased air temperature during extreme weather conditions affect tree crops and impact the yield and quality of fruits. Moreover, flowering and fruit set of Citrus are likely impaired by UV radiation and/or reduced carbon assimilation, which increase reactive oxygen species production and damage the leaf photosynthetic apparatus. Particle coating films sprayed on leaves have been offered as a way to minimize crop losses due to the climate change scenario, even though the extent of leaf protection is not characterized. We evaluated the use of two protective films on the oxidative stress and leaf photosynthesis of sweet orange trees exposed to varying daylight levels. Trees were maintained under full sun light, sprayed or not (control) with kaolin or calcium carbonate, and under reduced irradiance using either aluminum shade cloth 50% or anti-UV transparent plastic. Kaolin or calcium carbonate reflected 20-30% of the incident light on the leaf surface compared to leaves not sprayed and under full sunlight. Leaves with coating exhibited improved CO
Databáze: OpenAIRE
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