scholarly journals The OCL3 promoter from Sorghum bicolor directs gene expression to abscission and nutrient-transfer zones at the bases of floral organs

2014 ◽  
Vol 114 (3) ◽  
pp. 489-498 ◽  
Author(s):  
Krishna K. Dwivedi ◽  
Dominique J. Roche ◽  
Tom E. Clemente ◽  
Zhengxiang Ge ◽  
John G. Carman
Keyword(s):  
Gene Expression ◽  
Sorghum Bicolor ◽  
Nutrient Transfer ◽  
Floral Organs ◽  
Transfer Zones

scholarly journals Pitfall Flower Development and Organ Identity of Ceropegia sandersonii (Apocynaceae-Asclepiadoideae)

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1767
Author(s):  
Annemarie Heiduk ◽  
Dewi Pramanik ◽  
Marlies Spaans ◽  
Loes Gast ◽  
Nemi Dorst ◽  
...  
Keyword(s):  
Gene Expression ◽  
Floral Anatomy ◽  
Floral Organ ◽  
Mads Box ◽  
Floral Organs ◽  
Abcde Model ◽  
Organ Identity ◽  
Mads Box Gene ◽  
Flower Evolution ◽  
Developmental Phases

Deceptive Ceropegia pitfall flowers are an outstanding example of synorganized morphological complexity. Floral organs functionally synergise to trap fly-pollinators inside the fused corolla. Successful pollination requires precise positioning of flies headfirst into cavities at the gynostegium. These cavities are formed by the corona, a specialized organ of corolline and/or staminal origin. The interplay of floral organs to achieve pollination is well studied but their evolutionary origin is still unclear. We aimed to obtain more insight in the homology of the corona and therefore investigated floral anatomy, ontogeny, vascularization, and differential MADS-box gene expression in Ceropegia sandersonii using X-ray microtomography, Light and Scanning Electronic Microscopy, and RT-PCR. During 10 defined developmental phases, the corona appears in phase 7 at the base of the stamens and was not found to be vascularized. A floral reference transcriptome was generated and 14 MADS-box gene homologs, representing all major MADS-box gene classes, were identified. B- and C-class gene expression was found in mature coronas. Our results indicate staminal origin of the corona, and we propose a first ABCDE-model for floral organ identity in Ceropegia to lay the foundation for a better understanding of the molecular background of pitfall flower evolution in Apocynaceae.

scholarly journals Effects of exogenous salicylic acid on physiological traits and CBF gene expression in peach floral organs under freezing stress

2017 ◽  
Vol 69 (4) ◽  
pp. 585-592 ◽  
Author(s):  
Binbin Zhang ◽  
Ruijuan Ma ◽  
Lei Guo ◽  
Zhizhong Song ◽  
Mingliang Yu
Keyword(s):  
Gene Expression ◽  
Salicylic Acid ◽  
Physiological Traits ◽  
Freezing Stress ◽  
Floral Organs ◽  
Exogenous Salicylic Acid

SEUSS, a member of a novel family of plant regulatory proteins, represses floral homeotic gene expression withLEUNIG

Development ◽  
2002 ◽  
Vol 129 (1) ◽  
pp. 253-263 ◽  
Author(s):  
Robert G. Franks ◽  
Chunxin Wang ◽  
Joshua Z. Levin ◽  
Zhongchi Liu
Keyword(s):  
Gene Expression ◽  
Floral Meristem ◽  
Genetic Identification ◽  
Homeotic Gene ◽  
Dimerization Domain ◽  
Homeotic Transformation ◽  
Floral Organs ◽  
Floral Homeotic Gene ◽  
Homeotic Gene Expression ◽  
Floral Homeotic

Proper regulation of homeotic gene expression is critical for pattern formation during both animal and plant development. A negative regulatory mechanism ensures that the floral homeotic gene AGAMOUS is only expressed in the center of an Arabidopsis floral meristem to specify stamen and carpel identity and to repress further proliferation of the floral meristem. We report the genetic identification and characterization of a novel gene, SEUSS, that is required in the negative regulation of AGAMOUS. Mutations in SEUSS cause ectopic and precocious expression of AGAMOUS mRNA, leading to partial homeotic transformation of floral organs in the outer two whorls. The effects of seuss mutations are most striking when combined with mutations in LEUNIG, a previously identified repressor of AGAMOUS. More complete homeotic transformation of floral organs and a greater extent of organ loss in all floral whorls were observed in the seuss leunig double mutants. By in situ hybridization and double and triple mutant analyses, we showed that this enhanced defect was caused by an enhanced ectopic and precocious expression of AGAMOUS. Using a map-based approach, we isolated the SEUSS gene and showed that it encodes a novel protein with at least two glutamine-rich domains and a highly conserved domain that shares sequence identity with the dimerization domain of the LIM-domain-binding transcription co-regulators in animals. Based on these molecular and genetic analyses, we propose that SEUSS encodes a regulator of AGAMOUS and functions together with LEUNIG.

scholarly journals Genome-wide identification and expression analysis of the bHLH transcription factor family and its response to abiotic stress in sorghum [Sorghum bicolor (L.) Moench]

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Yu Fan ◽  
Hao Yang ◽  
Dili Lai ◽  
Ailing He ◽  
Guoxing Xue ◽  
...  
Keyword(s):  
Gene Expression ◽  
Transcription Factor ◽  
Sorghum Bicolor ◽  
Higher Plants ◽  
Bhlh Transcription Factor ◽  
Tissue Development ◽  
Functional Identification ◽  
Transcription Factor Family ◽  
Gene Expression Response ◽  
Genome Wide

Abstract Background Basic helix-loop-helix (bHLH) is a superfamily of transcription factors that is widely found in plants and animals, and is the second largest transcription factor family in eukaryotes after MYB. They have been shown to be important regulatory components in tissue development and many different biological processes. However, no systemic analysis of the bHLH transcription factor family has yet been reported in Sorghum bicolor. Results We conducted the first genome-wide analysis of the bHLH transcription factor family of Sorghum bicolor and identified 174 SbbHLH genes. Phylogenetic analysis of SbbHLH proteins and 158 Arabidopsis thaliana bHLH proteins was performed to determine their homology. In addition, conserved motifs, gene structure, chromosomal spread, and gene duplication of SbbHLH genes were studied in depth. To further infer the phylogenetic mechanisms in the SbbHLH family, we constructed six comparative syntenic maps of S. bicolor associated with six representative species. Finally, we analyzed the gene-expression response and tissue-development characteristics of 12 typical SbbHLH genes in plants subjected to six different abiotic stresses. Gene expression during flower and fruit development was also examined. Conclusions This study is of great significance for functional identification and confirmation of the S. bicolor bHLH superfamily and for our understanding of the bHLH superfamily in higher plants.

Biogenic silica nanostructures derived from Sorghum bicolor induced osteogenic differentiation through BSP, BMP-2 and BMP-4 gene expression

2020 ◽  
Vol 91 ◽  
pp. 231-240 ◽  
Author(s):  
Saleh Ahmed Atiah Hamad Jaafari ◽  
Jegan Athinarayanan ◽  
Vaiyapuri Subbarayan Periasamy ◽  
Ali A. Alshatwi
Keyword(s):  
Gene Expression ◽  
Sorghum Bicolor ◽  
Osteogenic Differentiation ◽  
Biogenic Silica ◽  
Silica Nanostructures
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