SPL8 and miR156-targeted SPL genes are known to play an essential role in Arabidopsis anther development. Here we show that these SPL genes are also expressed within the developing gynoecium, where they redundantly control development of the female reproductive tract. Whereas the gynoecium morphology in the spl8 single mutant is largely normal, additional down-regulation of miR156-targeted SPL genes results in a shortened style and an apically swollen ovary narrowing onto an elongated gynophore. In particular, the septum does not form properly and lacks a transmitting tract. Loss of SPL8 function enhances the mutant phenotypes of ett, crc and spt, indicating a functional overlap between SPL8 and these genes in regulating gynoecium development. Furthermore, gynoecium development of 35S:MIR156b spl8-1 double mutants shows enhanced sensitivity to a polar auxin transport inhibitor, and the expression pattern of the auxin biosynthesis gene YUCCA4 is altered compared to wild-type. Our observations imply that SPL8 and miR156-targeted SPL genes control gynoecium patterning through interference with auxin homeostasis and signalling.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/tpj.12221 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
OsMYB1 antagonizes OsSPL14 to mediate rice resistance to brown planthopper and Xanthomonas oryzae pv. oryzae.
Plant Cell Rep
December 2024
CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China.
OsMYB1 negatively mediates rice resistance to brown planthopper and rice blight. Additionally, OsMYB1 interacts with OsSPL14 and antagonizes its function by oppositely regulating downstream resistance-related genes. In their natural habitats, plants are concurrently attacked by different biotic factors.
View Article and Find Full Text PDFWhy the adventitious roots of poplar are so colorful: RNAseq and metabolomic analysis reveal anthocyanin accumulation in canker pathogens-induced adventitious roots in poplar.
Planta
December 2024
State Key Laboratory of Tree Genetics and Breeding, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing, China.
Article Synopsis
- The study focused on how poplar adventitious roots (ARs) change color due to interaction with fungal canker pathogens, revealing the mechanisms behind pigment production and metabolomic changes.
- An increase in the synthesis of pigments, especially cyanidin-3-O-glucoside, was observed, along with the discovery that sunlight exposure alters metabolic pathways related to flavonoid synthesis in these roots.
- Key genes involved in the coloration and biosynthesis were found to be upregulated or downregulated depending on light conditions, indicating a complex response of poplar trees to pathogen infection and environmental factors.
Proper activity of the age-dependent miR156 is required for leaf heteroblasty and extrafloral nectary development in Passiflora spp.
New Phytol
December 2024
Departamento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, SP, 13418-900, Brazil.
Article Synopsis
- The study investigates how the age-related microRNA miR156 influences the development of extrafloral nectaries (EFNs) in two species of passion flower.
- Results show that manipulation of miR156 affects both leaf maturation and EFN formation, with overexpression leading to smaller and fewer EFNs, while reduced activity results in larger EFNs in one species.
- This research highlights a connection between miR156 activity, nectar sugar profiles, and the ecological interactions between EFNs and ants, underscoring the role of the miR156/SPL module in regulating these traits based on leaf age.
A novel transcription factor CsSNACA2 plays a pivotal role within nitrogen assimilation in tea plants.
Plant J
December 2024
National Key Lab for Germplasm Innovation and Utilization of Horticultural Crops, Hubei Hongshan Laboratory, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
Tea (Camellia sinensis) is a globally renowned economic crop, with organs such as leaves and buds utilized for consumption. As a perennial foliage crop, tea plants have high-nitrogen consumption and demand but exhibit relatively low nitrogen use efficiency. Exploring the genetic factors involved in nitrogen assimilation in tea plants could lead to improvements in both tea yield and quality.
View Article and Find Full Text PDFEtiology, histology, and long-term outcome of bilateral testicular regression: a large Belgian series.
Hum Reprod Open
December 2023
Department of Internal Medicine and Pediatrics, Ghent University, Pediatric Endocrinology Service, Ghent University Hospital, Belgium, Ghent.
Article Synopsis
- - The study investigates the long-term effects of bilateral testicular regression (BTR) in individuals, focusing on growth and development outcomes, particularly highlighting suboptimal penile growth often related to genetic factors.
- - BTR, a rare condition with potential vascular and genetic origins, was analyzed in a cross-sectional study involving 35 participants recruited from eight pediatric endocrinology departments in Belgium over three years.
- - Key findings revealed common maternal complications during pregnancy and identified specific genetic variants in some participants, while a centralized review of gonadal tissue contributed to understanding the condition's clinical implications.
Want 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!