The research uses metabolic engineering to create a new species of "red crystal rice"

Reporters from South China Agricultural University learned that the school of life sciences, subtropical agricultural biological resources protection and utilization of the national key laboratory Liu Yaoguang academician team using the efficient multi-gene carrier system TGSII (TransGene Stacking II), to achieve the rice embryo-specific synthetic astrogen nutrition enhancement goal, to cultivate the world's first embryo milk rich in astringent new functional nutrient rice seed "aSTARice, astalegycin rice", also known as "chic rice." The findings were published October 5 in Molecular Plants.
, this is Liu Yaoguang academician team in 2017 after taking the lead in creating a functional nutrient-rich rice species "amethyst rice", another important scientific research results. The results of this series have developed and reserved a number of new varieties of rice with high nutritional value and rich color for our country, which has greatly promoted the development of plant synthesis biology and crop bio-strengthening research, and shows that our school has maintained the international leading level in the field of plant multigene transformation technology and genetic engineering of complex metabolic pathways.
carotenoids are an important phytonutrina, while astratin is an orange-red carotenoid pigment, the most superior form of carotenoids, with super antioxidant activity. At present, the synthesis of astratin has been realized in tobacco, tomatoes, potatoes, corn, lettuce and other plants. However, due to the complete lack of carotenoid prelocation in rice endosperm, the study of effective astrenaline synthesis in rice endosperm has not been reported.
Liu Yaoguang's team analyzed the expression patterns of the rice carotenoid synthesis pathway gene and found that most of the genes associated with carotenoid synthesis were in a non-expression or low expression state in rice endosperm. On this basis, combined with the analysis of "Golden Rice", the octhydrolycoprotein synthase gene (sZmPSY1), the octhydrolycope lycoprotein dehydrogenase gene (sPaCrtI), the β-carotene ketosterase gene (sCrBKT) and β-carotene were determined. The key genes of the four carotenoid synthesis pathways of the hydroxyase gene (sHpBHY) were reconsumed in rice endosperm by using rice endosperm-specific initiators and the self-developed high-efficiency multigene TGSII system.
the results showed that the two genes (sZmPSY1 and spaCrtI), the three genes (sZmPSY1, sPaCrtI and sCrBKT) and four genes (sZmPSY1, sPaCrtI, sCrBKT and sHpBHY) polymerized converted rice, respectively, obtained screening mark removal, rich in yellow β-carotene gold rice, orange-red colostrin rice and astringent rice new species. Thus, it is proved that the smallest combination of the above four genes can be used to achieve acetonin biosynthetics in rice endosperm and obtain astrenaline rice rich in high antioxidant active astalyanin. (Source: Science Network Zhu Hanbin FangXuan Zhao Xiucai)