Recent Posts

Four auxin-like compounds can selectively regulate plant development (PNAS)

Plants have developed their own strategies to ensure developmental plasticity, such as the use of phytohormones. The phytohormone auxin affects multiple aspects of plant development. Auxin is perceived via a co-receptor complex called TIR1/AFB-AUX/IAA, and SCF TIR1/AFB degrades AUX/IAA proteins to liberate…

Root branching is not induced by auxins in Selaginella moellendorffii (Front Plant Sci)

Auxin is crucial for root development across angiosperms. All the auxin signal transduction pathway components are conserved in land plants, but their role is still not completely clear in early diverged lineages. Here, Fang et al. present a comprehensive analysis of exogenous auxin addition and polar…

An aberrant protein phosphatase 2C confers abscisic acid tolerance and drives high transpiration during drought conditions in a parasitic plant, Striga ($) (Nature Plants)

Striga hermonthica is a parasitic plant which infects major crops in arid environments. The rate of transpiration in Striga is higher than that of the host plant, thus maintaining a water potential gradient from the host to the Striga plant. Until recently, the exact mechanism has been poorly understood.…

Review: Cytokinin – A developing story (Trends Plant Sci) ($)

With its diverse chemical structures, the phytohormone cytokinin is significant from embryogenesis to the maturation of plants. In this review, Wybouw and De Rybel highlight in detail cytokinin signaling in multiple plant developmental process including shoot, flower, stomata, root and vascular development.…

ARF5/MONOPTEROS directly regulates miR390 expression in the Arabidopsis thaliana primary root meristem (Plant Direct)

Previous studies have indicated that auxin controls gene expression via regulatory transcriptional networks, mediated by a family of DNA-binding auxin response factors (ARFs) that bind to auxin response DNA elements (AuxREs) in the promoters of genes. In this study, Dastidar et al. investigated the…

KAI2 regulates root and root hair development by modulating auxin distribution (bioRxiv)

To optimize growth, plant development is regulated by environmental information. Root morphology is adaptable to stimuli due to a network of phytohormone signalling pathways. Here Villaecija et al. studied the roles of strigolactones (SL) and karrikins (KL) signalling in controlling root and root hair…

Lateral inhibition by a peptide hormone-receptor cascade during Arabidopsis lateral root founder cell formation (Devel. Cell)

The plant hormone auxin acts as a general coordinator of growth and development, transferring information over both long and short ranges. Among other roles, it promotes the formation of the founder cells in roots and it triggers the position of the lateral roots (LR). LR founder cells  are determined…

Auxin efflux carrier ZmPGP1 mediates root growth inhibition under aluminum stress (Plant Physiology)

Acid soils (pH < 5.5) mobilize aluminum (Al) in the rhizosphere, which damages the root meristem and hinders exploration for nutrients and water. Zhang et al. demonstrate that a mutation in ZmPGP1, an auxin transport protein, imparts enhanced root growth under toxic Al conditions. The enhanced root…

A single JAZ repressor controls the jasmonate pathway in Marchantia polymorpha (Molecular Plant) ($)

Previously, Monte et al. showed that the liverwort Marchantia polymorpha perceives the jasmonate pathway precursor dn-OPDA instead of the well known JA-Ile phytohormone of vascular plants. Now, Monte and colleagues focus on the MpJAZ, downstream of the signal transduction pathway. MpJAZ is the sole…