Molecular genetic approaches to increasing mineral availability and vitamin content of cereals (Record no. 47870)

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control field 20250625153927.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-13672
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245 10 - TITLE STATEMENT
Title Molecular genetic approaches to increasing mineral availability and vitamin content of cereals
490 0# - SERIES STATEMENT
Volume/sequential designation Journal of Cereal Science, 46(3), p.308-326, 2007
520 3# - SUMMARY, ETC.
Summary, etc. The present paper summarizes the current state of knowledge on molecular genetic approaches to increasing iron and zinc availability and vitamin content in cereals. We have also attempted to integrate the scientific issues into the wider context of human nutrition. In the cereal grain, iron and zinc are preferentially stored together with phytate in membrane-enclosed globoids in the protein storage vacuole (PSV)found in the aleurone and the embryo scutellum. The PSV is accordingly central for understanding mineral deposition during grain filling and mobilization of minerals during germination. Recent studies in Arabidopsis have led to the first identification of ron and zinc transporters of the PSV and further illustrate some of the dynamics associated with mineral and phytate transport and deposition into the vacuole. This provides new opportunities for modulating iron and zinc deposition in the cereal grain. Current strategies towards increasing the iron content of the endosperm are largely based on the expression of legume ferritin genes in an endosperm-specific manner. However, it is apparent that this approach, at least in rice, only allows a two- to three-fold increase in the iron content of the grain due to exhaustion of the iron stores in leaves. Further increases thus have to rely on additional uptake and transport of iron from the root. Phytate is generally considered to be the single most important anti-nutritional factor for iron and zinc availability. In the current paper we summarize attempts to increase phytase activity in the grain by transformation and evaluate the potential of this approach as well as the reduction of phytate biosynthesis for improving the bioavailability of iron and zinc. Vitamins constitute the second important group of micronutrients in grain and we discuss current efforts to increase the amounts of provitamin A, vitamin C and vitamin E.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element MINERALS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element BIOAVAILABILITY
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element CEREALS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element VITAMINS
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Brinch-Pedersen, H.
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Personal name Borg, S.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Tauris, B.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Holm, P.B.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1R84MH4CtduD5CLS_s-BSuXKVBTtX78zi/view?usp=drivesdk">https://drive.google.com/file/d/1R84MH4CtduD5CLS_s-BSuXKVBTtX78zi/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-13672 25.06.2025 25.06.2025 Documentos solicitados