MAX4 and RMS1 are orthologous dioxygenase-like genes that regulate shoot branching in Arabidopsis and pea

被引:485
作者
Sorefan, K
Booker, J
Haurogné, K
Goussot, M
Bainbridge, K
Foo, E
Chatfield, S
Ward, S
Beveridge, C
Rameau, C
Leyser, O [1 ]
机构
[1] Univ York, Dept Biol, York YO10 5YW, N Yorkshire, England
[2] INRA, Stn Genet Ameliorat Plantes, F-78026 Versailles, France
[3] Univ Queensland, Sch Life Sci, Brisbane, Qld 4072, Australia
关键词
auxin; Arabidopsis; CCD; pea; shoot branching;
D O I
10.1101/gad.256603
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Shoot branching is inhibited by auxin transported down the stem from the shoot apex. Auxin does not accumulate in inhibited buds and so must act indirectly. We show that mutations in the MAX4 gene of Arabidopsis result in increased and auxin-resistant bud growth. Increased branching in max4 shoots is restored to wild type by grafting to wild-type rootstocks, suggesting that MAX4 is required to produce a mobile branch-inhibiting signal, acting downstream of auxin. A similar role has been proposed for the pea gene, RMS1. Accordingly, MAX4 and RMS1 were found to encode orthologous, auxin-inducible members of the polyene dioxygenase family.
引用
收藏
页码:1469 / 1474
页数:6
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