Publications by authors named "Alexandra Shigenaga"
Article Synopsis
- In Arabidopsis roots, growth occurs in defined zones, but how these zones coordinate growth is not fully understood.
- The peptide hormone PSY1 enhances root growth by promoting cell elongation and influencing gene expression related to flavonol production.
- Flavonols are essential for PSY1's function, as they accumulate in specific growth zones and help regulate cell elongation by modulating auxin and ROS activity.
Climate change is a defining challenge of the 21st century, and this decade is a critical time for action to mitigate the worst effects on human populations and ecosystems. Plant science can play an important role in developing crops with enhanced resilience to harsh conditions (e.g.
View Article and Find Full Text PDFPlant immunity: Rice XA21-mediated resistance to bacterial infection.
Proc Natl Acad Sci U S A
February 2022
Article Synopsis
- The article discusses the evolution of plant immunity research, particularly how scientists first sought to understand the genetics behind disease resistance about 30 years ago, which led to the identification of various immune receptors.
- It emphasizes the study of the rice XA21 receptor, which detects a microbial peptide called RaxX, produced by a specific type of bacteria, showcasing its importance in triggering immune responses in plants.
- The discussion highlights the complexity of these immune receptors in plants, the potential biological significance of RaxX, and the crucial role of sulfotyrosine in the interactions between receptors and their ligands.
Plant hormones regulate physiological responses in plants, including responses to pathogens and beneficial microbes. The last decades have provided a vast amount of evidence about the contribution of different plant hormones to plant immunity, and also of how they cooperate to orchestrate immunity activation, in a process known as hormone crosstalk. In this review we highlight the complexity of hormonal crosstalk in immunity and approaches currently being used to further understand this process, as well as perspectives to engineer hormone crosstalk for enhanced pathogen resistance and overall plant fitness.
View Article and Find Full Text PDFPlant hormones are essential regulators of plant growth and immunity. In the last few decades, a vast amount of information has been obtained detailing the role of different plant hormones in immunity, and how they work together to ultimately shape the outcomes of plant pathogen interactions. Here we provide an overview on the roles of the main classes of plant hormones in the regulation of plant immunity, highlighting their metabolic and signaling pathways and how plants and pathogens utilize these pathways to activate or suppress defence.
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