TRENDS IN THE BIOCHEMISTRY OF APPLES IMPACTED BY CLIMATE CHANGE
DOI:
https://doi.org/10.15547/tjs.2026.01.001Keywords:
climate change, apples, biochemistry, agroclimatic stress, sustainable agricultureAbstract
The aim of the study is to detect the changing trends of biochemical indicators in some of the most popular apple varieties as a result of climate factors. Their impact on the biochemical characteristics of apple fruits in the Kyustendil valley (Bulgaria) is followed for the period 2020–2025. Four standard apple varieties have been analyzed – Granny Smith, Golden Delicious, Red Delicious and Florina. The observed biochemical indicators are total dissolved sugars (Brix), electrical conductivity (EC), acidity (pH), redox potential (Eh), vitamin C, dissolved salts and solids (Salts and TDS). The results manifest a distinct trend towards an increase in temperatures and a decrease in precipitation, leading to an increase in Brix, EC, TDS, Salts, and vitamin C in all varieties, as well as a disruption of the salt balance in drier years. Eh and pH remain unchanged. Correlation analysis reveals links between temperature stress and some biochemical responses of plants, which has potential implications for agricultural practice, the food industry, and adaptation to climate change
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