Silencing of beta-carotene hydroxylase increases total carotenoid and beta-carotene levels in potato tubers
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چکیده
منابع مشابه
A study on chlorophyll, total carotenoid and beta-carotene contents in carrot and the effect of climate on them
Background: Carotenoids are pigments with important physiological effects in the human body that are involved in strengthening the immune system and reducing the risk of many diseases, including cancer. Objective: With regard to the importance of these substances and the high content of them in carrots (Daucus carota L.), and in order to identify the most suitable geographical area for obtainin...
متن کاملCarotene Hydroxylase Activity Determines the Levels of Both α-Carotene and Total Carotenoids in Orange Carrots.
The typically intense carotenoid accumulation in cultivated orange-rooted carrots (Daucus carota) is determined by a high protein abundance of the rate-limiting enzyme for carotenoid biosynthesis, phytoene synthase (PSY), as compared with white-rooted cultivars. However, in contrast to other carotenoid accumulating systems, orange carrots are characterized by unusually high levels of α-carotene...
متن کاملOverexpression of beta-carotene hydroxylase enhances stress tolerance in Arabidopsis.
Plant stress caused by extreme environmental conditions is already a principal reason for yield reduction in crops. The threat of global environment change makes it increasingly important to generate crop plants that will withstand such conditions. Stress, particularly stress caused by increased sunlight, leads to the production of reactive oxygen species that cause photo-oxidative cell damage....
متن کاملReconstitution of beta-carotene hydroxylase activity of thermostable CYP175A1 monooxygenase.
CYP175A1 is a thermostable P450 Monooxygenase from Thermus thermophilus HB27, demonstrating in vivo activity towards beta-carotene. Activity of CYP175A1 was reconstituted in vitro using artificial electron transport proteins. First results were obtained in the mixture with a crude Escherichia coli cell extract at 37 degrees C. In this system, beta-carotene was hydroxylated to beta-cryptoxanthin...
متن کاملBeta-carotene and lung cancer*
Does beta-carotene increase, rather than decrease, human lung cancer rates? A large body of observational epidemiologic study has demonstrated that individuals who eat more fruits and vegetables rich in carotenoids and/or who have higher levels of serum betacarotene have a lower risk of cancer, particularly lung cancer. This inverse relationship has been particularly strong in lung cancer patie...
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ژورنال
عنوان ژورنال: BMC Plant Biology
سال: 2007
ISSN: 1471-2229
DOI: 10.1186/1471-2229-7-11