MARC details
| 000 -LEADER |
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| fixed length control field |
02891nam a2200313Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20250625140611.0 |
| 040 ## - CATALOGING SOURCE |
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| Transcribing agency |
CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
B-9359 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT |
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| Title |
Maize phytoene desaturase and z-carotene desaturase catalyse a poly-Z desaturation pathway: implications for genetic engineering of carotenoid content among cereal crops |
| 490 0# - SERIES STATEMENT |
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| Volume/sequential designation |
Journal of Experimental Botany, 54(391), p.2215-2230, 2003 |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Carotene desaturation, an essential step in the biosynthesis of coloured carotenoids, has received much attention (1)as a target of bleaching herbicide action, (2)as a determinant of geometric isomer states of carotenoids and their metabolites, and (3)as a key modulator of accumulation and structural variability of carotenoids. Having previously isolated and functionally characterized the cDNA encoding the ®rst enzyme in maize carotene desaturation, phytoene desaturase (PDS), the isolation and functional characterization of the second desaturase, a maize endosperm cDNA (2265 bp)encoding zetacarotene (z-carotene)desaturase (ZDS)is reported here. Functional analysis of the concerted actions of maize PDS and ZDS ex situ showed these enzymes to mediate a poly-Z desaturation pathway to the predominate geometric isomer ,9,7¢,9¢-tetra-Z-lycopene (poly-Zlycopene or prolycopene), and not the all-trans substrate required of the downstream lycopene cyclase enzymes. This ®nding suggests a rate-controlling isomerase associated with the carotene desaturases as a corollary of a default poly-Z carotenoid biosynthetic pathway active in planta for maize. Comparative gene analysis between maize and rice revealed that genes encoding PDS and ZDS are single copy; the Zds cDNA characterized here was mapped to maize chromosome 7S and vp9 is suggested as a candidate locus for the structural gene while y9 is ruled out. Classical genetic resources were used to dissect the desaturation steps further and hydroxyphenylpyruvate dioxygenase was linked to the vp2 locus, narrowing candidate loci for an obligate isomerase in maize to only a few. Since the ®rst functional analysis of the paired carotene desaturases for a cereal crop is reported here, the implications for the genetic modi®cation of the provitamin A content in cereal crops such as rice and maize, are discussed. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
BIOSYNTHESIS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
CAROTENOID |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
DESATURASE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
GENES |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
ISOPRENOID |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
MAIZE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
MUTANTS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
PHYTOENE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
RICE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
ZETACAROTENE |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Matthews, P.D. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Luo, R. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Wurtzel, E.T. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="https://drive.google.com/file/d/1Kdw5MdzQZDqZ7TK9HuiScBWT_9E7O0ps/view?usp=drivesdk">https://drive.google.com/file/d/1Kdw5MdzQZDqZ7TK9HuiScBWT_9E7O0ps/view?usp=drivesdk</a> |
| Public note |
Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Clasificación local |
| Koha item type |
Documentos solicitados |
