scholarly journals Redundant regulation of meristem identity and plant architecture by FRUITFULL, APETALA1 and CAULIFLOWER

Development ◽  
2000 ◽  
Vol 127 (4) ◽  
pp. 725-734 ◽  
Author(s):  
C. Ferrandiz ◽  
Q. Gu ◽  
R. Martienssen ◽  
M.F. Yanofsky
Keyword(s):  
Plant Architecture ◽  
Ectopic Expression ◽  
Flower Initiation ◽  
Mads Box ◽  
Inflorescence Architecture ◽  
Endogenous Factors ◽  
Leafy Shoots ◽  
Meristem Identity ◽  
Mads Box Gene ◽  
Reproductive Phases

The transition from vegetative to reproductive phases during Arabidopsis development is the result of a complex interaction of environmental and endogenous factors. One of the key regulators of this transition is LEAFY (LFY), whose threshold levels of activity are proposed to mediate the initiation of flowers. The closely related APETALA1 (AP1) and CAULIFLOWER (CAL) meristem identity genes are also important for flower initiation, in part because of their roles in upregulating LFY expression. We have found that mutations in the FRUITFULL (FUL) MADS-box gene, when combined with mutations in AP1 and CAL, lead to a dramatic non-flowering phenotype in which plants continuously elaborate leafy shoots in place of flowers. We demonstrate that this phenotype is caused both by the lack of LFY upregulation and by the ectopic expression of the TERMINAL FLOWER1 (TFL1) gene. Our results suggest that the FUL, AP1 and CAL genes act redundantly to control inflorescence architecture by affecting the domains of LFY and TFL1 expression as well as the relative levels of their activities.

scholarly journals PROLIFERATING INFLORESCENCE MERISTEM, a MADS-Box Gene That Regulates Floral Meristem Identity in Pea

2002 ◽  
Vol 129 (3) ◽  
pp. 1150-1159 ◽  
Author(s):  
Scott A. Taylor ◽  
Julie M.I. Hofer ◽  
Ian C. Murfet ◽  
John D. Sollinger ◽  
Susan R. Singer ◽  
...  
Keyword(s):  
Floral Meristem ◽  
Mads Box ◽  
Inflorescence Meristem ◽  
Floral Meristem Identity ◽  
Meristem Identity ◽  
Mads Box Gene

scholarly journals FRUITFULL-like genes regulate flowering time and inflorescence architecture in tomato

2020 ◽  
Author(s):  
Xiaobing Jiang ◽  
Greice Lubini ◽  
José Hernandes-Lopes ◽  
Kim Rijnsburger ◽  
Vera Veltkamp ◽  
...  
Keyword(s):  
Flowering Time ◽  
Regulatory Networks ◽  
Mads Box ◽  
Inflorescence Meristem ◽  
Cytokinin Signaling ◽  
Inflorescence Architecture ◽  
Mads Box Gene ◽  
Gene Regulatory ◽  
Transition To Flowering

ABSTRACTThe timing of flowering and inflorescence architecture are critical for the reproductive success of tomato, but the gene regulatory networks underlying these traits are still hardly explored. Here we show that the tomato FRUITFULL-like (FUL-like) genes FUL2 and MADS-BOX PROTEIN 20 (MBP20) induce flowering and repress inflorescence branching. FUL1 fulfils a less prominent role and appears to depend on FUL2 and MBP20 for its upregulation in the inflorescence meristem. Our results demonstrate that MBP10, the fourth tomato FUL-like gene, has probably lost its function. The tomato FUL-like proteins cannot homodimerize, but heterodimerize with JOINTLESS (J), SlMBP21 (J2), ENHANCER OF JOINTLESS (EJ2/MADS1) and the SOC1-homolog TOMATO MADS-box gene 3 (TM3), which are co-expressed during inflorescence meristem maturation. Transcriptome analysis revealed various interesting downstream targets, including five repressors of cytokinin signaling, which are all upregulated during the vegetative-to-reproductive transition in ful1/ful2/mbp10/mbp20 mutants. FUL2 and MBP20 can also bind in vitro to the upstream regions of these genes, thereby probably directly stimulating cell division in the meristem upon the transition to flowering. Our research reveals that the four tomato FUL-like genes have diverged functions, but together regulate the important developmental processes flowering time, inflorescence architecture and fruit development.

scholarly journals A Cucumber AGAMOUS-LIKE 15 (AGL15) MADS-Box Gene Mediates Abnormal Leaf Morphology in Arabidopsis

Agronomy ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 265
Author(s):  
Yong Zhou ◽  
Lingli Ge ◽  
Lifang Hu ◽  
Yingui Yang ◽  
Shiqiang Liu
Keyword(s):  
Functional Characterization ◽  
Ectopic Expression ◽  
Leaf Size ◽  
Reproductive Organs ◽  
Mads Box ◽  
Cucumis Sativus L ◽  
Reading Frame ◽  
Relationship Analysis ◽  
Mads Box Gene

The AGL15 subfamily MADS-box proteins play vital roles in various developmental processes, such as floral transition, somatic embryogenesis, and leaf and fruit development. In this work, an AtAGL15 ortholog, CsMADS26, was cloned from cucumber (Cucumis sativus L.). The open reading frame (ORF) of CsMADS26 is 669 bp in length, encoding a predicted protein of 222 amino acids. The CsMADS26 protein contains a highly conserved MADS-box domain and a variable C domain, as well as less conserved I and K domains. Phylogenetic relationship analysis revealed that CsMADS26 was clustered into the AGL15 clade of AGL15 subfamily. Expression analysis based on qRT-PCR showed that CsMADS26 is mainly expressed in reproductive organs including flowers and fruits. Transgenic Arabidopsis plants with ectopic expression of CsMADS26 exhibited curled rosette and cauline leaves, and the leaf size was much smaller than that of wild-type (WT) plants. These results provide clues for the functional characterization of CsMADS26 in the future.

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