An advantage of analyzing abscission in genetically tractable model plants is the ability to make use of classic genetic tools such as suppression analysis. We have investigated the regulation of organ abscission by carrying out suppression analysis in flowers. Plants carrying mutations in the () gene, which encodes an ADP-ribosylation factor GTPase-activating protein, retain their outer floral organs after fertilization. Mutant alleles of (), which encodes a receptor-like cytoplasmic kinase, were found to restore organ abscission in flowers in an allele-specific manner. To further explore the basis of the interactions between and , we tested whether the site of a mutation is predictive of its ability to be suppressed. Our results suggest instead that the strength of a allele influences whether organ abscission can be rescued by a specific allele of .
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5073242 | PMC |
| http://dx.doi.org/10.3389/fpls.2016.01588 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Subtilases: a major prospect to the genome editing in horticultural crops.
Front Plant Sci
January 2025
Institute of Life Sciences, Kangwon National University, Chuncheon, Republic of Korea.
Plant peptides, synthesized from larger precursor proteins, often undergo proteolytic cleavage and post-translational modifications to form active peptide hormones. This process involves several proteolytic enzymes (proteases). Among these, SBTs (serine proteases) are a major class of proteolytic enzymes in plants and play key roles in various regulatory mechanisms, including plant immune response, fruit development and ripening, modulating root growth, seed development and germination, and organ abscission.
View Article and Find Full Text PDFA regulatory network involving calmodulin controls phytosulfokine peptide processing during drought-induced flower abscission.
Plant Cell
December 2024
College of Horticulture, Shenyang Agricultural University, Shenyang 110866, China.
Drought stress substantially decreases crop yields by causing flowers and fruits to detach prematurely. However, the molecular mechanisms modulating organ abscission under drought stress remain unclear. Here, we show that expression of CALMODULIN2 (CaM2) is specifically and sharply increased in the pedicel abscission zone in response to drought and plays a positive role in drought-induced flower drop in tomato (Solanum lycopersicum).
View Article and Find Full Text PDFAbscission is a tightly regulated process in which plants shed unnecessary, infected, damaged, or aging organs, as well as ripe fruits, through predetermined abscission zones in response to developmental, hormonal, and environmental signals. Despite its importance, the underlying mechanisms remain incompletely understood. This study highlights the deleterious effects of abscission on chloroplast ultrastructure in the cells of the tomato flower pedicel abscission zone, revealing spatiotemporal differential gene expression and key transcriptional networks involved in chloroplast vesiculation during abscission.
View Article and Find Full Text PDFDiverse functional interactions between ABA and ethylene in plant development and responses to stress.
Physiol Plant
December 2024
State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou, China.
Abscisic acid (ABA) and ethylene are two essential hormones that play crucial roles throughout the entire plant life cycle and in their tolerance to abiotic or biotic stress. In recent decades, increasing research has revealed that, in addition to their individual roles, these two hormones are more likely to function through their interactions, forming a complex regulatory network. More importantly, their functions change and their interactions vary from synergistic to antagonistic depending on the specific plant organ and development stage, which is less focused, compared and systematically summarized.
View Article and Find Full Text PDFPost-Flowering Photoperiod Sensitivity of Soybean in Pod-Setting Responses.
Biology (Basel)
October 2024
Guangdong Key Laboratory of Plant Adaptation and Molecular Design, School of Life Sciences, Guangzhou University, Guangzhou 510006, China.
Article Synopsis
- - The study examines how the photoperiod influences soybean development, particularly focusing on flowering time and its effects on pod formation.
- - Findings reveal that long-day conditions prolong the flowering-to-pod formation interval and result in flower drop, while short-day conditions affect pistil morphology, aiding pollen interaction and pod timing.
- - The research also identifies photoperiod-insensitive mutants that show no change in pod formation timing, suggesting that hormones, ROS signals, and sucrose application may play roles in flower drop.
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!