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<p>This study examines the impact of deficient irrigation and high temperatures on the levels of growth, production and physico-chemical quality of the plum cultivar ‘Angelino’ (<i>Prunus salicina</i>&#xa0;L.). The study was conducted in the field of the National Agricultural Research Institute (INRA) experimental estate at ‘Ain Taoujdate’. Two stress treatments were applied, namely a&#xa0;drought stress (DS) level of 50% of crop evapotranspiration (ETc), and exposure to a&#xa0;heat stress (HS) of 2.5 °C, were compared with on-demand irrigation (100% of ETc) not under thermal stress, during the fruit development period from the fruit set stage until harvest time. Observations were made on various traits that could be stress descriptors, including fruit yield, certain vegetative growth characteristics including shoot length, number of leaves and leaf area, as well as physiological characteristics such as stomatal characteristics, leaf proline, cuticular wax and chlorophyll&#xa0;a&#xa0;and&#xa0;b pigment content, with some chemical and biochemical components of plum quality. The results obtained showed that the effect of drought and heat stress reduced plum productivity by a&#xa0;general average of 61%, vegetative growth also declined by 49% and physiological characteristics decreased by 48% except proline and cuticular wax, although the taste quality of plums was improved thanks to increases in the content of sugars, amino acids and polyphenols. This illustrates the need for agriculture in the study area to adapt to the conditions imposed and predicted by climate change in terms of water resources and high temperatures.</p>

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Evaluating the Vulnerability and Adaptive Potential of Japanese Plum ‘Angelino’ to Drought and Heat Stress

  • 期刊论文

  • 发表日期：

    2025年6月5日

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  • Anas Hamdani,
  • Said Bouda,
  • Atman Adiba,
  • Rachid Razouk

摘要

This study examines the impact of deficient irrigation and high temperatures on the levels of growth, production and physico-chemical quality of the plum cultivar ‘Angelino’ (Prunus salicina L.). The study was conducted in the field of the National Agricultural Research Institute (INRA) experimental estate at ‘Ain Taoujdate’. Two stress treatments were applied, namely a drought stress (DS) level of 50% of crop evapotranspiration (ETc), and exposure to a heat stress (HS) of 2.5 °C, were compared with on-demand irrigation (100% of ETc) not under thermal stress, during the fruit development period from the fruit set stage until harvest time. Observations were made on various traits that could be stress descriptors, including fruit yield, certain vegetative growth characteristics including shoot length, number of leaves and leaf area, as well as physiological characteristics such as stomatal characteristics, leaf proline, cuticular wax and chlorophyll a and b pigment content, with some chemical and biochemical components of plum quality. The results obtained showed that the effect of drought and heat stress reduced plum productivity by a general average of 61%, vegetative growth also declined by 49% and physiological characteristics decreased by 48% except proline and cuticular wax, although the taste quality of plums was improved thanks to increases in the content of sugars, amino acids and polyphenols. This illustrates the need for agriculture in the study area to adapt to the conditions imposed and predicted by climate change in terms of water resources and high temperatures.