The effect of heat stress on yield, growth, physiology and fruit quality in Japanese plum ‘Angelino’

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Online ISSN : 2229-4473.
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Doi: 10.1007/s42535-023-00644-y
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Keywords: n Prunus salicina L., Climate warming, Temperature, Vegetative growth, Phenology


The interest of this work is to appreciate the plasticity of tolerance and adaptability to high temperatures by analyzing the production, growth, physiology and fruit quality traits of the plum variety ‘Angelino’ (Prunus salicina L.). The experiment was conducted in 2021 on fourteen-year-old trees under drip irrigation installed at National Institute for Agronomic Research located in the Sais plain (northern Morocco). Two heat treatments were applied: a control treatment (the external temperature of the experimental station) in which the trees received the field temperature (C) and a heat treatment in which the trees received a temperature of + 2.5 °C (S). The adaptability of plum trees to heat stress was assessed by analyzing several traits including agro-physiological growth and some plum quality traits. The results showed significant differences in response to heat stress for all traits analyzed. The production traits were regressed with an overall mean of 30%, as well as the vegetative and physiological traits with mean of 44.6 and 50.5%, respectively. Chemical and biochemical traits of the fruits were affected differently by heat stress through increase in soluble sugar content, total phenolic compounds and total antioxidant capacity while showing improvement in plum quality. The preliminary results reported in this research identified the degree of influence of plum in the response to heat stress, suggesting its use in breeding programmes to improve the tolerance of the plum species to heat stress.

n                     Prunus salicina L., Climate warming, Temperature, Vegetative growth, Phenology

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The authors thank C.D. Khalfi, M. Alghoum and E. Bouichou for assistance with field and laboratory work and M. Lahlou for his help in experimental orchard management and treatment applications.

Author Information

Hamdani Anas
National Institute of Agricultural Research (INRA), Rabat, Morocco