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Chilling and Freezing Temperature Stress Differently Influence Glucosinolates Content in Brassica oleracea var. acephala

Ljubej, Valentina; Radojčić Redovniković, Ivana; Salopek Sondi, Branka; Smolko, Ana; Roje, Sanja; Šamec, Dunja (2021) Chilling and Freezing Temperature Stress Differently Influence Glucosinolates Content in Brassica oleracea var. acephala. Plants, 10 (7). ISSN 2223-7747

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Brassica oleracea var. acephala is known to have a strong tolerance to low temperatures, but the protective mechanisms enabling this tolerance are unknown. Simultaneously, this species is rich in health-promoting compounds such as polyphenols, carotenoids, and glucosinolates. We hypothesize that these metabolites play an important role in the ability to adapt to low temperature stress. To test this hypothesis, we exposed plants to chilling (8 °C) and additional freezing (−8 °C) temperatures under controlled laboratory conditions and determined the levels of proline, chlorophylls, carotenoids, polyphenols, and glucosinolates. Compared with that of the control (21 °C), the chilling and freezing temperatures increased the contents of proline, phenolic acids, and flavonoids. Detailed analysis of individual glucosinolates showed that chilling increased the total amount of aliphatic glucosinolates, while freezing increased the total amount of indolic glucosinolates, including the most abundant indolic glucosinolate glucobrassicin. Our data suggest that glucosinolates are involved in protection against low temperature stress. Individual glucosinolate species are likely to be involved in different protective mechanisms because they show different accumulation trends at chilling and freezing temperatures.

Item Type: Article
Uncontrolled Keywords: Brassica oleracea var. acephala ; low temperature stress ; glucosinolates ; polyphenols ; abiotic stress
Subjects: NATURAL SCIENCES > Biology
Divisions: Division of Molecular Biology
Project titleProject leaderProject codeProject type
Metabolički i transkriptomski odgovor raštike na stres izazvan niskim temperaturamaŠamec, Dunja12/17HRZZ
Agrobioraznolikost - osnova za prilagodbu i ublažavanje posljedica klimatskih promjena u poljoprivrediGoreta Ban, Smiljana; Salopek Sondi, Branka; Bauer, Nataša; Jasprica, Nenad; Kereša, SnježanaKK.
Depositing User: Dunja Šamec
Date Deposited: 29 Jun 2021 11:49
DOI: 10.3390/plants10071305

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