Abstract:
:Genetic screens have been performed to identify mutants with altered auxin homeostasis in Arabidopsis. A tagged allele of the auxin-overproducing mutant sur2 was identified within a transposon mutagenized population. The SUR2 gene was cloned and shown to encode the CYP83B1 protein, which belongs to the large family of the P450-dependent monooxygenases. SUR2 expression is up-regulated in sur1 mutants and induced by exogenous auxin in the wild type. Analysis of indole-3-acetic acid (IAA) synthesis and metabolism in sur2 plants indicates that the mutation causes a conditional increase in the pool size of IAA through up-regulation of IAA synthesis.
journal_name
Proc Natl Acad Sci U S Aauthors
Barlier I,Kowalczyk M,Marchant A,Ljung K,Bhalerao R,Bennett M,Sandberg G,Bellini Cdoi
10.1073/pnas.260502697keywords:
subject
Has Abstractpub_date
2000-12-19 00:00:00pages
14819-24issue
26eissn
0027-8424issn
1091-6490pii
260502697journal_volume
97pub_type
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