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Science 4 July 1986:
Vol. 233. no. 4759, pp. 34 - 38
DOI: 10.1126/science.233.4759.34
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Articles
Photosynthesis-Associated Gene Families: Differences in Response to Tissue-Specific and Environmental Factors
JUNE SIMPSON 1,
MARC VAN MONTAGU 2, and
LUIS HERRERA-ESTRELLA 3
1 Graduate student, Laboratorium voor Genetica, Rijksuniversiteit Gent, B-9000 Gent (Belgium)
2 Associate professor, Laboratorium voor Genetica, Rijksuniversiteit Gent, B-9000 Gent (Belgium)
3 Centro de Investigacion y Estudios Avanzados del IPN, Apdo Postal 629, 36500 Irapuato, Gto (Mexico).
The endogenous small subunit of the ribulose-1,5-bisphosphate carboxylase gene rbcS and the light-harvesting chlorophyll a/b-binding protein gene (LHCP) of pea are expressed in a light-inducible manner and are active mainly in green chloroplast-containing tissue. Chimeric genes under control of the 5'-flanking sequences of the rbcS ss3.6 or LHCP AB80 genes from pea were used to study the factors relating to the issue-specific and lightinducible expression of these nuclear-encoded genes in transgenic tobacco plants. The results show that plastid development plays a crucial role in the activation of expression of these chimeric genes. Particular members of each of the above gene families respond differently to tissue-specific and environmental factors. Furthermore, the light-inducible expression directed by the 5'-flanking sequence of ss3.6 rbcSgene is not exclusively mediated by phytochrome, but probably is controlledin large part by another photoreceptor.
Submitted on February 26, 1986
Accepted on May 13, 1986
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