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The OsFOR1 gene encodes a polygalacturonase-inhibiting protein (PGIP) that regulates floral organ number in rice SCIE SCOPUS

Title
The OsFOR1 gene encodes a polygalacturonase-inhibiting protein (PGIP) that regulates floral organ number in rice
Authors
Jang, SHLee, BKim, CKim, SJYim, JHan, JJLee, SKim, SRAn, G
Date Issued
2003-10
Publisher
KLUWER ACADEMIC PUBL
Abstract
We have isolated a cDNA clone, OsFOR1, from the immature panicles of rice. The OsFOR1 (Oryza sativa floral organ regulator 1) gene encodes a protein that contains a leucine-rich repeat (LRR) domain. This domain comprises 10 tandem repeats of a canonical 24-amino acid LRR sequence. The structure and the number of LRRs for OsFOR1 are similar to those of polygalacturonase-inhibiting proteins (PGIPs) from various other plant species. Moreover, the OsFOR1 recombinant protein, when fused to maltose-binding protein (MBP), shows PGIP activity against the Aspergillus niger polygalacturonase. OsFOR1 is highly expressed in the calli and immature and mature panicles, while detectable at only low levels in seedling roots and mature stems. In situ hybridization experiments showed the transcripts of OsFOR1 are present in young spikelet primordia and in almost all of the young floral organs. Transgenic approaches were used to study in vivo functioning. Antisense expression of OsFOR1 resulted in an increase in the numbers of floral organs, including the stamen, carpel, palea/lemma, stigma, and lodicule. OsFOR1 transcript was not detected in the frizzy panicle mutant, which is defective in its spikelet formation but normal in inflorescence-meristem initiation and maintenance. Therefore, we suggest that OsFOR1 plays a role in the formation and/or maintenance of floral organ primordia.
Keywords
antisense; flower development; leucine-rich repeats (LRR); polygalacturonase-inhibiting protein (PGIP); rice (Oryza sativa); RAPE BRASSICA-NAPUS; PHASEOLUS-VULGARIS; REPEAT PROTEIN; MOLECULAR CHARACTERIZATION; FLOWER DEVELOPMENT; APPLE FRUIT; EXPRESSION; BETA; PURIFICATION; ARCHITECTURE
URI
https://oasis.postech.ac.kr/handle/2014.oak/18213
DOI
10.1023/B:PLAN.0000006940.89955.f1
ISSN
0167-4412
Article Type
Article
Citation
PLANT MOLECULAR BIOLOGY, vol. 53, no. 3, page. 357 - 369, 2003-10
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안진흥AN, GYNHEUNG
Div of Integrative Biosci & Biotech
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