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Regulation of Plant Vitamin Metabolism:Backbone of Biofortification for the Alleviation of Hidden Hunger

Molecular Plant 2021年第3期14卷 40-60页

作者： Ling Jiang simon strobbe Dominique Van Der Straeten Chunyi Zhang Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Laboratory of Functional Plant Biology Ghent UniversityK.L.Ledeganckstraat 359000 GhentBelgium These authors contributed equally to this work

Micronutrient deficiencies include shortages of vitamins and *** affect billions of people and are associated with long-range effects on health,learning ability,and huge economic *** of multiple micronutrients can play an important role in combating *** challenge,however,is to balance plant growth with nutrient requirements for ***,we summarize the major progress about vitamin biosynthesis and its response to the changing *** discuss the interactions among vitamins as well as possible strategies for vitamin ***,we propose to integrate new breeding technologies with metabolic pathway modification to facilitate the biofortification of crops,thereby alleviating the hidden hunger of target populations.

关键词： vitamins biosynthesis regulatory mechanisms biofortification hidden hunger

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Folate Biofortification of Potato by Tuber-Specific Expression of Four Folate Biosynthesis Genes

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Molecular Plant 2018年第1期11卷 175-188页

作者： Jolien De Lepeleire simon strobbe Jana Verstraete Dieter Blancquaert Lars Ambach Richard G.F. Visser Christophe Stove Dominique Van Der Straeten Laboratory of Functional Plant Biology Department of Biology Ghent University K.L. Ledeganckstraat 35 9000 Ghent Belgium Laboratory of Toxicology Department of BioanalysisGhent University Ottergemsesteenweg 460 9000 Ghent Belgium Plant Breeding Wageningen University & Research Droevendaalsesteeg 16700 Wageningen the Netherlands These authors contributed equally to this article.

Insufficient dietary intake of micronutHents, known as ＂hidden hunger＂, is a devastating global burden, affecting two billion people. Deficiency of folates （vitamin B9）, which are known to play a central role in Cl metabolism, causes birth defects in at least a quarter million people annually. Biofortification to enhance the level of naturally occurring folates in crop plants, proves to be an efficient and cost-effective tool in fighting folate deficiency. Previously, introduction of folate biosynthesis genes GTPCHI andADCS, proven to be a successful biofortification strategy in rice and tomato, turned out to be insufficient to adequately increase folate levels in potato tubers. Here, we provide a proof of concept that additional introduction of HPPK/DHPS and/or FPGS, downstream genes in mitochonddal folate biosynthesis, enables augmenta- tion of folates to satisfactory levels （12-fold） and ensures folate stability upon long-term storage of tubers. In conclusion, this engineering strategy can serve as a model in the creation of folate-accumulating potato cultivars, readily applicable in potato-consuming populations suffedng from folate deficiency.

关键词： folate vitamin Bg malnutrition biofortification potato metabolic engineering

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