{"id":10364,"date":"2026-07-27T15:45:11","date_gmt":"2026-07-27T13:45:11","guid":{"rendered":"https:\/\/www.1stfruits.co.za\/wp\/?p=10364"},"modified":"2026-07-27T15:45:11","modified_gmt":"2026-07-27T13:45:11","slug":"screening-citrus-cultivars-for-freezing-tolerance-by-reliable-methods","status":"publish","type":"post","link":"https:\/\/www.1stfruits.co.za\/wp\/screening-citrus-cultivars-for-freezing-tolerance-by-reliable-methods\/","title":{"rendered":"Screening Citrus Cultivars for Freezing Tolerance by Reliable Methods"},"content":{"rendered":"

Citrus species are comprised of susceptible plants that can barely tolerate freezing temperatures. To determine the relationship between cold stress tolerance (LT50) and some important physiological traits, four commercial citrus cultivars of citrus species were studied. These were Citrus unshiu, Citrus sinensis var. \u2018Thomson navel\u2019, Citrus paradisi var. \u2018Star Ru by\u2019 and Citrus limon var. \u2018Lisbon\u2019. Assessments of cold-stress tolerance were carried out at 4, -4 and -8 \u00b0C. Ultimately, the results showed that the Japanese mandarin and \u2018Thomson navel\u2019 had the highest stress tolerance (LT50). Citrus unshiu tolerated cold stress up to -8.4 LT50.<\/p>\n

<\/p>\n

The correlation coefficient demonstrated that significant, positive correlations were observed between several pairs of attributes, i.e. LT50 and total flavonoids, chlorophyll a and chlorophyll b, carotenoids and chlorophyll a, chlorophyll b and total chlorophyll, relative moisture content and malondialdehyde, as well as glycine betaine and catalase. According to the regression coefficient, a change of one unit in lipid peroxidation caused a decrease of 1.9238 units and 5.9615 units in LT50 at +4 and -4 \u00b0C, respectively. While commercial citrus cultivars were selected for cold-tolerance and other traits, the efficiency of cold-tolerance correlated more with carotenoid content, chlorophyll content and lipid peroxidation, considering the assessments at particular temperatures.<\/p>\n

Click here to read the full article.<\/a><\/p>\n

Article Source:<\/p>\n

Ali Salehi Sardoei, Mehdi Sharifani, Mostafa Khoshhal Sarmast, Mahmoud Ghasemnejad<\/strong>
\nInternational Journal of Horticultural Science and Technology<\/a><\/p><\/blockquote>\n

Image Source:<\/p>\n

www.magnific.com<\/a><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

Citrus species are comprised of susceptible plants that can barely tolerate freezing temperatures. To determine the relationship between cold stress tolerance (LT50) and some important physiological traits, four commercial citrus cultivars of citrus species were studied. These were Citrus unshiu, Citrus sinensis var. \u2018Thomson navel\u2019, Citrus paradisi var. \u2018Star Ru by\u2019 and Citrus limon var. […]<\/p>\n","protected":false},"author":10,"featured_media":10365,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36],"tags":[852,849,850,851],"class_list":["post-10364","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","tag-low-temperatures","tag-plant-breeding","tag-principal-component-analysis","tag-regression"],"acf":[],"yoast_head":"\nScreening Citrus Cultivars for Freezing Tolerance by Reliable Methods - Firstfruits<\/title>\n<meta name=\"description\" content=\"Citrus species are comprised of susceptible plants that can barely tolerate freezing temperatures. 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