Multifunctional evolution of B and AGL6 MADS box genes in orchids

AbstractWe previously found that B and AGL6 proteins form L (OAP3-2/OAGL6-2/OPI) and SP (OAP3-1/OAGL6-1/OPI) complexes to determine lip/sepal/petal identities in orchids. Here, we show that the functional L’ (OAP3-1/OAGL6-2/OPI) and SP’ (OAP3-2/OAGL6-1/OPI) complexes likely exist and AP3/PI/AGL6 genes have acquired additional functions during evolution. We demonstrate that the presumed L’ complex changes the structure of the lower lateral sepals and helps the lips fit properly in the center of the flower. In addition, we find that OAP3-1/OAGL6-1/OPI in SP along with presumed SP’ complexes regulate anthocyanin accumulation and pigmentation, whereas presumed L’ along with OAP3-2/OAGL6-2/OPI in L complexes promotes red spot formation in the perianth. Furthermore, the B functional proteins OAP3-1/OPI and OAGL6-1 in the SP complex could function separately to suppress sepal/petal senescence and promote pedicel abscission, respectively. These findings expand the current knowledge behind the multifunctional evolution of the B and AGL6 genes in plants.

Download Full-text

Faculty Opinions recommendation of Assessing the redundancy of MADS-box genes during carpel and ovule development.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1014213.193284 ◽

2003 ◽

Author(s):

Guenter Theissen

Keyword(s):

Ovule Development ◽

Mads Box ◽

Mads Box Genes

Download Full-text

Faculty Opinions recommendation of Petaloidy and petal identity MADS-box genes in the balsaminoid genera Impatiens and Marcgravia.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1033833.387918 ◽

2006 ◽

Author(s):

Elizabeth Kellogg

Keyword(s):

Mads Box ◽

Mads Box Genes ◽

Petal Identity

Download Full-text

Comparative evolutionary analysis of MADS-box genes inArabidopsisthalianaand A.lyrata

Biodiversity Science ◽

10.3724/sp.j.1003.2010.109 ◽

2010 ◽

Vol 18 (2) ◽

pp. 109 ◽

Cited By ~ 1

Author(s):

Xue Haoyue ◽

Xu Guixia ◽

Guo Chunce ◽

Shan Hongyan ◽

Kong Hongzhi

Keyword(s):

Evolutionary Analysis ◽

Mads Box ◽

Mads Box Genes

Download Full-text

Genome-wide identification and analysis of the MADS-box gene family and its potential role in fruit ripening in black raspberry (Rubus occidentalis L.)

Journal of Berry Research ◽

10.3233/jbr-200679 ◽

2021 ◽

pp. 1-15

Author(s):

Yaqiong Wu ◽

Chunhong Zhang ◽

Wenlong Wu ◽

Weilin Li ◽

Lianfei Lyu

Keyword(s):

Gene Family ◽

Fruit Ripening ◽

Fruit Development ◽

Expression Patterns ◽

Type I ◽

Black Raspberry ◽

Mads Box ◽

Mads Box Genes ◽

Genome Wide ◽

Mads Box Gene

BACKGROUND: Black raspberry is a vital fruit crop with a high antioxidant function. MADS-box genes play an important role in the regulation of fruit development in angiosperms. OBJECTIVE: To understand the regulatory role of the MADS-box family, a total of 80 MADS-box genes were identified and analyzed. METHODS: The MADS-box genes in the black raspberry genome were analyzed using bioinformatics methods. Through an analysis of the promoter elements, the possible functions of different members of the family were predicted. The spatiotemporal expression patterns of members of the MADS-box family during black raspberry fruit development and ripening were systematically analyzed. RESULTS: The genes were classified into type I (Mα: 33; Mβ: 6; Mγ: 10) and type II (MIKC *: 2; MIKCC: 29) genes. We also obtained a complete overview of the RoMADS-box gene family through phylogenetic, gene structure, conserved motif, and cis element analyses. The relative expression analysis showed different expression patterns, and most RoMADS-box genes were more highly expressed in fruit than in other tissues of black raspberry. CONCLUSIONS: This finding indicates that the MADS-box gene family is involved in the regulation of fruit ripening processes in black raspberry.

Download Full-text