{'fraction_non_alphanumeric': 0.023446658851113716, 'fraction_numerical': 0.005861664712778429, 'mean_word_length': 5.373134328358209, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Short-term Cooling of Cucumber Roots Alters Leaf Carbohydrate Metabolism


The influence of short-term cooling of cucumber (Cucumis sativus L. ‘Calypso’) roots on leaf expansion and carbohydrate metabolism was studied. Leaf expansion of greenhouse-grown cucumber plants irrigated twice daily with chilled water (5°C) was reduced by about 15% relative to that of plants irrigated with water at ambient greenhouse air temperature, even though the soil was never below 15°C. Leaf carbon exchange rate was not affected by rooting medium temperature. However, photoassimilate export rate was reduced from leaves of plants with cooled roots and starch accumulation in leaves of these plants was increased relative to that in control plants. Galactinol concentrations were significantly higher in leaves of plants that had reduced photoassimilate export rates.