JOINTLESS is a MADS-box gene controlling tomato flower abscissionzone development

Mao, Long; Begum, Dilara; Chuang, Huey Wen; Budiman, Muhammad A.; Szymkowiak, Eugene J.; Irish, Erin E.; Wing, Rod A.

doi:10.1038/35022611

Cited by 299 publications

(207 citation statements)

References 19 publications

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“…Inflorescence reversions have also been found in the jointless tomato mutant, besides its major effect on the abscission zone of the flower pedicel (Szymkowiak and Irish 1999). The JOINTLESS gene encodes a MADS-box transcription factor and maps on chromosome 11 (Mao et al 2000), while the SFT locus is located on chromosome 3 (Kerr 1982), indicating that sft and jointless are not allelic. A leafy indeterminate inflorescence is also produced by mutations in the tomato AP1-like gene LeMADS-MC, but this also maps in a different chromosome with respect to SFT (Vrebalov et al 2002).…”

Section: Discussionmentioning

confidence: 95%

SINGLE FLOWER TRUSS regulates the transition and maintenance of flowering in tomato

Molinero-Rosales

LaTorre

Jamilena

et al. 2004

Planta

106

108

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The characterisation of the single flower truss ( sft) mutant phenotype of tomato ( Lycopersicon esculentum Mill.), as well as its genetic interactions with other mutations affecting FALSIFLORA ( FA) and SELF PRUNING ( SP) genes, has revealed that SFT is a key gene in the control of floral transition and floral meristem identity. The single sft mutation produces a late-flowering phenotype in both long-day and short-day conditions. In combination with fa, a mutation affecting the tomato gene orthologous to LFY, sft completely blocks the transition to flowering in this species. Thus, the phenotype of the sft fa double mutants indicates that SFT and FA participate in two parallel pathways that regulate the switch from vegetative to reproductive phase in tomato, and that both genes are indispensable for flowering. On the other hand, the replacement of flowers by vegetative shoots observed in the sft inflorescence suggests that SFT regulates flower meristem identity during inflorescence development of tomato. In addition to these two main functions, SFT is involved in the development of both flowers and sympodial shoots of tomato. First, the mutation produces a partial conversion of sepals into leaves in the first floral whorl, and a reduction in the number of floral organs, particularly carpels. Secondly, the sympodial development in the mutant plants is altered, which can be related to the interaction between SFT and SP, a gene controlling the number of nodes in sympodial shoots. In fact, we have found that the sft phenotype is epistatic to that of sp, and that the level of SP mRNA in the apical buds of sft around flowering is reduced. SFT can therefore co-ordinate the regulation of two simultaneous developmental processes in the tomato apical shoot, the promotion of flowering in one sympodial segment and the vegetative development of the next segment.

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Section: Discussionmentioning

confidence: 95%

SINGLE FLOWER TRUSS regulates the transition and maintenance of flowering in tomato

Molinero-Rosales

LaTorre

Jamilena

et al. 2004

Planta

106

108

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“…We confirmed the transcription of the intact ToCPL1 by RT-PCR using total RNA of immature flower bud (data not shown). The gene for Jointless was characterized and revealed as a MADS box transcription factor (Mao et al 2000). The possible function of ToCPL1 as the jointless-2 gene is currently under investigation.…”

Section: Transposable Elementsmentioning

confidence: 99%

In-depth sequence analysis of the tomato chromosome 12 centromeric region: identification of a large CAA block and characterization of pericentromere retrotranposons

et al. 2005

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We sequenced a continuous 326-kb DNA stretch of a microscopically defined centromeric region of tomato chromosome 12. A total of 84% of the sequence (270 kb) was composed of a nested complex of repeat sequences including 27 retrotransposons, two transposable elements, three MITEs, two terminal repeat retrotransposons in miniature (TRIMs), ten unclassified repeats and three chloroplast DNA insertions. The retrotransposons were grouped into three families of Ty3-Gypsy type long terminal repeat (LTR) retrotransposons (PCRT1-PCRT3) and one LINE-like retrotransposon (PCRT4). High-resolution fluorescence in situ hybridization analyses on pachytene complements revealed that PCRT1a occurs on the pericentromere heterochromatin blocks. PCRT1 was the prevalent retrotransposon family occupying more than 60% of the 326-kb sequence with 19 members grouped into eight subfamilies (PCRT1a-PCRT1h) based on LTR sequence. The PCRT1a subfamily is a rapidly amplified element occupying tens of megabases. The other PCRT1 subfamilies (PCRT1b-PCRT1h) were highly degenerated and interrupted by insertions of other elements. The PCRT1 family shows identity with a previously identified tomato-specific repeat TGR2 and a CENP-B like sequence. A second previously described genomic repeat, TGR3, was identified as a part of the LTR sequence of an Athila-like PCRT2 element of which four copies were found in the 326-kb stretch. A large block of trinucleotide microsatellite (CAA)n occupies the centromere and large portions of the flanking pericentromere heterochromatin blocks of chromosome 12 and most of the other chromosomes. Five putative genes in the remaining 14% of the centromere region were identified, of which one is similar to a transcription regulator (ToCPL1) and a candidate jointless-2 gene.

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“…SHATTER-PROOF (SHP1 and SHP2) MADS-box genes act together to specify the valve margin of the silique in Arabidopsis, and are essential for the ligniWcation of the valve margin cells (Lilijegren et al 2000), further study shows that the two transcription factors FRUIT-FULL and REPLUMLESS negatively regulate SHP expression in valve margin, resulting in the limit of the valve margin diVerentiation at the valve edges (Ferrándiz et al 2000;Roeder et al 2002). Another MADS-box gene JIONTLESS plays a central role in the diVerentiation of the pedicel AZ in tomato plant (Mao et al 2000). ALCATRAZ (ALC) encodes a myc/bHLH transcription factor and contributes in the formation of a strip of labile nonligniWed cells link with partly ligniWed valve and replum, which provide the tension for pod dehiscence (Rajani and Sundaresan 2001).…”

Section: Introductionmentioning

confidence: 97%

Origin of seed shattering in rice (Oryza sativa L.)

Lin

Griffith

et al. 2007

Planta

230

184

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A critical evolutionary step during rice domestication was the elimination of seed shattering. Wild rice disperses seeds freely at maturity to guarantee the propagation, while cultivated rice retains seeds on the straws to make easy harvest and decrease the loss of production. The molecular basis for this key event during rice domestication remains to be elucidated. Here we show that the seed shattering is controlled by a single dominant gene, Shattering1 (SHA1), encoding a member of the trihelix family of plant-specific transcription factors. SHA1 was mapped to a 5.5 kb genomic fragment, which contains a single open reading frame, using a backcrossed population between cultivated rice Teqing and an introgression line IL105 with the seed shattering habit derived from perennial common wild rice, YJCWR. The predicted amino acid sequence of SHA1 in YJCWR and IL105 is distinguished from that in eight domesticated rice cultivars, including Teqing, by only a single amino acid substitution (K79N) caused by a single nucleotide change (g237t). Further sequence verification on the g237t mutation site revealed that the g237t mutation is present in all the domesticated rice cultivars, including 92 indica and 108 japonica cultivars, but not in any of the 24 wild rice accessions examined. Our results demonstrate that the g237t mutation in SHA1 accounts for the elimination of seed shattering, and that all the domesticated rice cultivars harbor the mutant sha1 gene and therefore have lost the ability to shed their seeds at maturity. In addition, our data support the theory that the non-shattering trait selection during rice domestication occurred prior to the indica-japonica differentiation in rice evolutionary history.

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JOINTLESS is a MADS-box gene controlling tomato flower abscissionzone development

Cited by 299 publications

References 19 publications

SINGLE FLOWER TRUSS regulates the transition and maintenance of flowering in tomato

SINGLE FLOWER TRUSS regulates the transition and maintenance of flowering in tomato

In-depth sequence analysis of the tomato chromosome 12 centromeric region: identification of a large CAA block and characterization of pericentromere retrotranposons

Origin of seed shattering in rice (Oryza sativa L.)

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