scholarly journals Developmental Robustness by Obligate Interaction of Class B Floral Homeotic Genes and Proteins

2009 ◽  
Vol 5 (1) ◽  
pp. e1000264 ◽  
Author(s):  
Thorsten Lenser ◽  
Günter Theißen ◽  
Peter Dittrich
Keyword(s):  
Homeotic Genes ◽  
Floral Homeotic Genes ◽  
Class B ◽  
Obligate Interaction ◽  
Floral Homeotic

A novel MADS-box gene subfamily with a sister-group relationship to class B floral homeotic genes

2002 ◽  
Vol 266 (6) ◽  
pp. 942-950 ◽  
Author(s):  
A. Becker ◽  
K. Kaufmann ◽  
A. Freialdenhoven ◽  
C. Vincent ◽  
M.-A. Li ◽  
...  
Keyword(s):  
Sister Group ◽  
Sister Group Relationship ◽  
Homeotic Genes ◽  
Mads Box ◽  
Floral Homeotic Genes ◽  
Class B ◽  
Mads Box Gene ◽  
Gene Subfamily ◽  
Floral Homeotic

scholarly journals Epigenetics of floral homeotic genes in relation to sexual dimorphism in the dioecious plant Mercurialis annua

2018 ◽  
Author(s):  
Janardan Khadka ◽  
Narendra Singh Yadav ◽  
Micha Guy ◽  
Gideon Grafi ◽  
Avi Golan-Goldhirsh
Keyword(s):  
Sexual Dimorphism ◽  
Specific Factor ◽  
Homeotic Genes ◽  
Dioecious Plant ◽  
Floral Homeotic Genes ◽  
Class B ◽  
Gender Specific ◽  
Female Flowers ◽  
Mercurialis Annua ◽  
Floral Homeotic

AbstractIn plants, dioecy characterizes species carrying male and female flowers on separate plants and occurs in about 6% of angiosperms. To date, the molecular mechanism(s) underlying sexual dimorphism is essentially unknown. The ability of gender-reversal by hormone application suggests that epigenetics might play an important role in sexual dimorphism. Proteome analysis of nuclei derived from flower buds of females, males and feminized males of the dioecious plant Mercurialis annua revealed differentially expressed proteins related to nucleic acid binding proteins, hydrolases and transcription factors, including floral homeotic genes. Further analysis showed that class B genes are mainly expressed in male flowers, while class D genes, as well as SUPERMAN-like genes, were mainly expressed in female flowers. Cytokinin-induced feminization of male plants was associated with down-regulation of male-specific genes concomitantly with up-regulation of female-specific genes. No correlation could be found between the expression of class B and D genes and their DNA methylation or chromatin conformation. Thus, our results ruled out epigenetic control over floral identity genes as the major determinants regulating sexual dimorphisms. Rather, determination of sex in M. annua might be controlled upstream of floral identity genes by a gender-specific factor that affects hormonal homeostasis.HighlightsSex determination in Mercurialis annua is not related to epigenetics of floral homeotic genes but appears to be modulated by an unknown gender-specific regulator(s) that affects hormonal homeostasis.

scholarly journals Positive selection and ancient duplications in the evolution of class B floral homeotic genes of orchids and grasses

2009 ◽  
Vol 9 (1) ◽  
pp. 81 ◽  
Author(s):  
Mariana Mondragón-Palomino ◽  
Luisa Hiese ◽  
Andrea Härter ◽  
Marcus A Koch ◽  
Günter Theißen
Keyword(s):  
Positive Selection ◽  
Homeotic Genes ◽  
Floral Homeotic Genes ◽  
Class B ◽  
Floral Homeotic
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