AI Article Synopsis
- Castor (Ricinus communis L) serves as a model for studying sex mechanisms in plants due to its diverse sex expression and the impact of sex reversion on hybrid seed purity.
- The study examines the development of unisexual flowers, sex reversions, and variations across different genotypes, finding that male and female flowers go through 8 and 12 developmental stages, respectively, with a notable bisexual phase early on.
- Temperature plays a key role in influencing the sex expression of castor flowers, with high temperatures promoting male traits and cooler temperatures allowing for female traits to re-emerge, while gene expression related to male characteristics may influence sex determination.
Article Abstract
Castor (Ricinus communis L) is an ideal model species for sex mechanism studies in monoecious angiosperms, due to wide variations in sex expression. Sex reversion to monoecy in pistillate lines, along with labile sex expression, negatively influences hybrid seed purity. The study focuses on understanding the mechanisms of unisexual flower development, sex reversions and sex variations in castor, using various genotypes with distinct sex expression pattern. Male and female flowers had 8 and 12 developmental stages respectively, were morphologically similar till stage 4, with an intermediate bisexual state and were intermediate between type 1 and type 2 flowers. Pistil abortion was earlier than stamen inhibition. Sex alterations occurred at floral and inflorescence level. While sex-reversion was unidirectional towards maleness via bisexual stage, at high day temperatures (T > 38 °C), femaleness was restored with subsequent drop in temperatures. Temperature existing for 2-3 weeks during floral meristem development, influences sexuality of the flower. We report for first time that unisexuality is preceded by bisexuality in castor flowers which alters with genotype and temperature, and sex reversions as well as high sexual polymorphisms in castor are due to alterations in floral developmental pathways. Differentially expressed (male-abundant or male-specific) genes Short chain dehydrogenase reductase 2a (SDR) and WUSCHEL are possibly involved in sex determination of castor.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7895920 | PMC |
| http://dx.doi.org/10.1038/s41598-021-81781-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Increased gastrointestinal bleeding-related mortality during the COVID-19 pandemic.
Therap Adv Gastroenterol
January 2025
F. Widjaja Inflammatory Bowel Disease Institute, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, West Hollywood 90048, CA, USAKarsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
Background: Despite its significant health burden, there is a lack of national-level temporal patterns in gastrointestinal bleeding (GIB) mortality.
Objectives: To comprehensively decipher the annual and monthly trend of GIB-related mortality in the United States.
Design: Cross-sectional study.
Sex-Stratified Bidirectional Mendelian Randomization Analysis of Eating Habits and Female Pelvic Peritoneal Adhesions.
Int J Womens Health
December 2024
Department of Obstetrics and Gynecology, Changning Maternity and Infant Health Hospital, East China Normal University, Shanghai, 200050, People's Republic of China.
Background: Female pelvic peritoneal adhesions (FPPA) represent a significant global health burden. Dietary habits play a crucial role in health outcomes, yet their influence on FPPA remains unclear. This study aims to explore the bidirectional causal relationships between 72 eating habits and FPPA using sex-stratified Mendelian randomization (MR).
View Article and Find Full Text PDFEvolutionary insights and expression patterns of sex-related gene families in the zig-zag eel Mastacembelus armatus.
Comp Biochem Physiol A Mol Integr Physiol
January 2025
Key Laboratory of Prevention and Control for Aquatic Invasive Alien Species, Ministry of Agriculture and Rural Affairs, Guangdong Modern Recreational Fisheries Engineering Technology Center, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Guangdong Provincial Key Laboratory of Aquatic Animal Immunology and Sustainable Aquaculture, Guangzhou 510380, China. Electronic address:
The zig-zag eel exhibits both sexual dimorphism and sex reversal, making it crucial to understand the mechanisms of sex determination and differentiation. Additionally, the wild populations of the zig-zag eel are significantly declining, emphasizing the need for urgent conservation efforts. In this study, we identified 7 Dmrt, 62 HMG-box, and 73 TGF-β family members in the zig-zag eel genome.
View Article and Find Full Text PDFA 10-Year Comparative Analysis of the Two Most Common Reverse Total Shoulder Arthroplasty Implants (Delta Xtend and SMR) in the New Zealand Joint Registry.
J Shoulder Elbow Surg
January 2025
Department of Orthopedic Surgery, Auckland City Hospital, Grafton, Auckland, New Zealand.
Hypothesis And Background: As the incidence of reverse total shoulder arthroplasty (RTSA) continues to rise, better understanding of the long-term risks and complications is necessary to determine the best choice of implant. The majority (75%) of RTSA performed in New Zealand use either SMR (Systema Multiplana Randelli, Lima-LTO, Italy) or Delta Xtend (DePuy Synthes, USA). The aim of this registry-based study was to compare implant survival, risk of revision and reasons for revision between the two most frequently used RTSA prostheses: SMR and Delta Xtend.
View Article and Find Full Text PDFAdolescent cerebellar nuclei manipulation alters reversal learning and perineuronal net intensity independently in male and female mice.
J Neurosci
January 2025
Arizona State University, Department of Psychology, Tempe, AZ, 85287 USA.
The cerebellum, identified to be active during cognitive and social behavior, has multisynaptic connections through the cerebellar nuclei (CN) and thalamus to cortical regions, yet formation and modulation of these pathways are not fully understood. Perineuronal nets (PNNs) respond to changes in local cellular activity and emerge during development. PNNs are implicated in learning and neurodevelopmental disorders, but their role in the CN during development is unknown.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!