GEPHE SUMMARY Print
Gephebase Gene
Entry Status
Published
GepheID
GP00001631
Main curator
Prigent
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Rice cultivar Azucena exudes high strigolactone (SL) levels and induces high germination of the root parasitic plant Striga hermonthica. Azucena is a low-tillering variety as Sls inhibit shoot branching
Trait State in Taxon B
Rice cultivar Bala is a low strigolactone producer and stimulate less Striga germination. It is highly tillered
Ancestral State
Unknown
Taxonomic Status
Taxon A
Latin Name
Common Name
rice
Synonyms
rice; red rice; Oryza sativa L.
Rank
species
Lineage
Show more ... ytina; Embryophyta; Tracheophyta; Euphyllophyta; Spermatophyta; Magnoliophyta; Mesangiospermae; Liliopsida; Petrosaviidae; commelinids; Poales; Poaceae; BOP clade; Oryzoideae; Oryzeae; Oryzinae; Oryza
NCBI Taxonomy ID
is Taxon A an Infraspecies?
Yes
Taxon A Description
Rice cultivar Azucena exudes high strigolactone (SL) levels and induces high germination of the root parasitic plant Striga hermonthica. Azucena is a low-tillering variety as Sls inhibit shoot branching
Taxon B
Latin Name
Common Name
rice
Synonyms
rice; red rice; Oryza sativa L.
Rank
species
Lineage
Show more ... ytina; Embryophyta; Tracheophyta; Euphyllophyta; Spermatophyta; Magnoliophyta; Mesangiospermae; Liliopsida; Petrosaviidae; commelinids; Poales; Poaceae; BOP clade; Oryzoideae; Oryzeae; Oryzinae; Oryza
NCBI Taxonomy ID
is Taxon B an Infraspecies?
Yes
Taxon B Description
Rice cultivar Bala is a low strigolactone producer and stimulate less Striga germination. It is highly tillered
GENOTYPIC CHANGE
Generic Gene Name
Os01g0700900
Synonyms
SLB1; Os01g0700900
String
-
Sequence Similarities
Belongs to the cytochrome P450 family.
GO - Biological Process
-
UniProtKB
Oryza sativa subsp. japonica
GenebankID or UniProtKB
Presumptive Null
Yes
Molecular Type
Aberration Type
Deletion Size
10-100 kb
Molecular Details of the Mutation
deletion of 2 cytochrome P450 genes (Os010700900 & Os01g0701400)
Experimental Evidence
Authors
Cardoso C; Zhang Y; Jamil M; Hepworth J; Charnikhova T; Dimkpa SO; Meharg C; Wright MH; et al. ... show more
Abstract
Rice (Oryza sativa) cultivar Azucena--belonging to the Japonica subspecies--exudes high strigolactone (SL) levels and induces high germination of the root parasitic plant Striga hermonthica. Consistent with the fact that SLs also inhibit shoot branching, Azucena is a low-tillering variety. In contrast, Bala, an Indica cultivar, is a low-SL producer, stimulates less Striga germination, and is highly tillered. Using a Bala × Azucena F6 population, a major quantitative trait loci--qSLB1.1--for the exudation of SL, tillering, and induction of Striga germination was detected on chromosome 1. Sequence analysis of the corresponding locus revealed a rearrangement of a 51- to 59-kbp stretch between 28.9 and 29 Mbp in the Bala genome, resulting in the deletion of two cytochrome P450 genes--SLB1 and SLB2--with high homology to the Arabidopsis SL biosynthesis gene, MAX1. Both rice genes rescue the Arabidopsis max1-1 highly branched mutant phenotype and increase the production of the SL, ent-2'-epi-5-deoxystrigol, when overexpressed in Bala. Furthermore, analysis of this region in 367 cultivars of the publicly available Rice Diversity Panel population shows that the rearrangement at this locus is a recurrent natural trait associated with the Indica/Japonica divide in rice.
Additional References
COMMENTS
homologs of Arabidopsis strigolactone biosynthesis gene MAX1
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