Tag: Hormones and Growth Regulators

Gene redundancy and/or developmental defects of higher order mutants make it hard to study the role of individual components of auxin signaling. Structural biology approach can provide a detour that circumvents endogenous auxin signaling. Removing of the phenyl moiety of F79 in the auxin receptor…

Strigolactones (SLs) are plant hormones with pivotal roles in plant growth. Being conserved among all plant species, they’ve been recruited by plant-associated microbes as plant-derived molecules allowing microbes to detect plants, exchange signals and establish interactions with them. In this review,…

Proc. Natl. Acad. Sci. USA. The shoot apical meristem (SAM) is essential for the adaptation of aerial plant tissue architecture to changes in the environment. This paper by Landrein and colleagues connects changes in the plant environment (soil type, soil fertility, nitrate concentration) to changes…

Plant Cell. The yield potential of crops is strongly influenced by floral architecture, a trait determined by the fate of stem cells in meristematic tissue.  Meristems themselves are influenced by several factors, including phytohormones such as brassinosteroids (BRs) and gibberellic acid (GA).  BRs…

The plant cytoskeleton determines cell shape and integrity by delivering cellulose microfibrils and other cell wall components to the plasma membrane and cell wall. Auxin is involved in establishing the polarity of cell expansion and auxin distribution is partly regulated by actin. Sahi et al. examine…

Development is driven by the activities of hormones which control expression of various traits. Modeling hormone pathways is complicated by extensive cross-talk, redundancy, and feedback loops. Khakhar et al. investigate the use of a technique known as Hormone Activated Cas9-based Repressors (HACRs)…

Much of our understanding of strigolactones (SLs) as developmental hormones and rhizosphere signals comes from studies of angiosperms. Understanding the ancestral role for strigolactones is complicated by the fact that some of the SL-related genes are closely related to those responsive to karrikins…

Ethylene is a gaseous plant hormone that affects the growth and development of plants and mediates plant stress responses. Ethylene is perceived by a family of five receptors in Arabidopsis thaliana including ETHYLENE RESPONSE1 (ETR1) and ETR2. Surprisingly, there are cases where the different ethylene…