MARC details
| 000 -LEADER |
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| fixed length control field |
01924nam 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 |
20250625140633.0 |
| 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-10556 |
| 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 |
Fine control of caffeine biosynthesis in tissue cultures of Camellia sinensis |
| 490 0# - SERIES STATEMENT |
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| Volume/sequential designation |
PhytoChemistry Letters, 1(4), p.195-198, 2008 |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
To determine whether caffeine biosynthesis is controlled by the availability of purine precursors and/or methyl-donors, we examined the effect of some purine compounds on purine alkaloid accumulation, using tea callus cultures. No stimulation of caffeine biosynthesis was observed when the calli were cultured with 0.5 mM adenosine, guanosine or hypoxanthine for 3 weeks. However, 0.5 mM paraxanthine doubled the caffeine level relative to controls. Adenosine stimulated the growth of callus and reduced the caffeine concentration 3 months after inoculation. These results indicate that methylation of xanthosine by 7-methylxanthosine synthase is the most plausible rate-limiting step of caffeine biosynthesis; the supply of non-methylated purine precursors or availability of S-adenosyl-Lmethionine are not the principal controlling factors of caffeine biosynthesis. Adenosine salvage to adenine nucleotide synthesis may contribute to the growth of tea calli, but not to caffeine biosynthesis. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
CAMELLIA SINENSIS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
THEACEAE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
TEA |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
TISSUE CULTURE |
| 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 |
CAFFEINE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
PARAXANTHINE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
PURINE NUCLEOSIDE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
PURINE BASE |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Deng W.W. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Li, Y. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Ogita, S. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Ashihara, H. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="https://drive.google.com/file/d/1n_k0Lk4buBkY2klT-FyCUtxRXtDYwXXc/view?usp=drivesdk">https://drive.google.com/file/d/1n_k0Lk4buBkY2klT-FyCUtxRXtDYwXXc/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 |
