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RISS 인기검색어
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- 저자 : Lippman Zachary B. (검색결과 2 건)
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Control of inflorescence architecture in tomato by BTB/POZ transcriptional regulators
Xu, Cao,Park, Soon Ju,Van Eck, Joyce,Lippman, Zachary B. Cold Spring Harbor Laboratory 2016 Genes & development Vol.30 No.18
<P>Plant productivity depends on inflorescences, flower-bearing shoots that originate from the stem cell populations of shoot meristems. Inflorescence architecture determines flower production, which can vary dramatically both between and within species. In tomato plants, formation of multiflowered inflorescences depends on a precisely timed process of meristem maturation mediated by the transcription factor gene TERMINATING FLOWER (TMF), but the underlying mechanism is unknown. We show that TMF protein acts together with homologs of the Arabidopsis BLADE-ON-PETIOLE (BOP) transcriptional cofactors, defined by the conserved BTB (Broad complex, Tramtrack, and Bric-a-brac)/POZ (POX virus and zinc finger) domain. TMF and three tomato BOPs (S1BOPs) interact with themselves and each other, and TMF recruits S1BOPs to the nucleus, suggesting formation of a transcriptional complex. Like TMF, S1BOP gene expression is highest during vegetative and transitional stages of meristem maturation, and CRISPR/Cas9 elimination of S1BOP function causes pleiotropic defects, most notably simplification of inflorescences into single flowers, resembling tmf mutants. Flowering defects are enhanced in higher-order s1bop tmf mutants, suggesting that S1BOPs function with additional factors. In support of this, S1BOPs interact with TMF homologs, mutations in which cause phenotypes like sibop mutants. Our findings reveal a new flowering module defined by S1BOP TMF family interactions that ensures a progressive meristem maturation to promote inflorescence complexity.</P>
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Variation in the flowering gene SELF PRUNING 5G promotes day-neutrality and early yield in tomato
Soyk, Sebastian,Mü,ller, Niels A,Park, Soon Ju,Schmalenbach, Inga,Jiang, Ke,Hayama, Ryosuke,Zhang, Lei,Van Eck, Joyce,Jimé,nez-Gó,mez, José,M,Lippman, Zachary B Nature Publishing Group, a division of Macmillan P 2017 Nature genetics Vol.49 No.1
<P>Plants evolved so that their flowering is triggered by seasonal changes in day lengths. However, day-length sensitivity in crops limits their geographical range of cultivation, and thus modification of the photoperiod response was critical for their domestication(2-11). Here we show that loss of day-length-sensitive flowering in tomato was driven by the florigen paralog and flowering repressor SELF-PRUNING 5G (SP5G). SP5G expression is induced to high levels during long days in wild species, but not in cultivated tomato because of cis-regulatory variation. CRISPR/Cas9-engineered mutations in SP5G cause rapid flowering and enhance the compact determinate growth habit of field tomatoes, resulting in a quick burst of flower production that translates to an early yield. Our findings suggest that pre-existing variation in SP5G facilitated the expansion of cultivated tomato beyond its origin near the equator in South America, and they provide a compelling demonstration of the power of gene editing to rapidly improve yield traits in crop breeding.</P>
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