Entries by Eva Marie Gomez Alverez

Methyltransferase TaSAMT1 mediates wheat freezing tolerance by integrating brassinosteroid and salicylic acid signaling

Temperature extremes, such as cold stress, severely affect wheat (Triticum aestivum) productivity and quality by impairing its vegetative and reproductive growth. Several phytohormones have roles in cold stress, such as brassinosteroids (BRs) and salicylic acid (SA). However, how BR interacts with SA in response to cold stress remains unknown. In this work, Chu et al. […]

Plant stem cells under low oxygen: metabolic rewiring by phytoglobin underlies stem cell functionality

When flooding occurs, soils become saturated and oxygen solubility and diffusion decreases. This situation creates a hypoxic environment in the roots that stresses the plant, causing significantly decreased growth. However, the quiescent center (QC) stem cells, located in the root apical meristem, are highly hypoxic under normal oxygen tension. When hypoxia is imposed to the […]

The HOS15-HDA9 complex associates with HYL1 to modulate miRNA expression in response to ABA signalling

MicroRNAs (miRNAs) play a crucial role in plant cell homeostasis, particularly in response to environmental biotic and abiotic stresses. The transcription of miRNAs is mediated by RNA Polymerase II which generates the primary miRNA transcripts (pri-miRNAs). HYPONASTIC LEAVES 1 (HYL1) is a miRNA biogenesis protein indirectly associated with chromatin through the interaction with the nascent […]

EIN3/EIN3-LIKE1 modulate FLC expression via histone demethylase interaction

Flowering time is determined by both endogenous factors and environmental cues to ensure successful reproduction. ETHYLENE INSENSITIVE 3 (EIN3) and EIN3 LIKE 1 (EIL1) are transcription factors which are the key downstream regulators of ethylene signal transduction. Rapid flowering is promoted by the repression of FLOWERING LOCUS C (FLC). It has been seen that FLOWERING […]

PIF4 regulates microtubule organization to mediate high temperature–induced hypocotyl elongation

Plant growth adaptation to heat stress (thermomorphogenesis) is regulated by changes in plant morphology such as petiole and hypocotyl elongation.  One of the known players in this response is PHYTOCHROME-INTERACTING FACTOR 4 (PIF4), a central regulator of hypocotyl elongation. However, the mechanisms underlying the response, including PIF4 interactors, are unclear. In addition, cortical microtubules can […]

MicroRNA encoded peptide affects arsenic sensitivity

MicroRNAs (miRNAs) are small non-coding RNAs that down-regulate their targets through translational repression or mRNA cleavage.  Some pri-miRNAs encode small regulatory peptides (miPEP) which regulate plant growth and development by modulating subsequent miRNA expression. How different biotic or abiotic stresses may affect the role of these peptides remains unclear.  In this work, Kumar et al. […]

TOR couples energy to oxygen sensing to modulate hypoxic gene expression

Floods limit plant oxygen availability, impacting their growth and productivity. In hypoxia, the ERF-VII group of transcription factors are stabilized and activate Hypoxia-Responsive Genes (HRG) that prepare the plant to face the stress. In this situation, plant metabolism switches from oxidative phosphorylation in mitochondria to fermentation, decreasing the production of ATP. Four hours after the […]

Control of guard cell aperture by protein kinase CIPK23

Guard cells are responsible for the opening and closing of stomata through changes in osmotic content and turgor pressure. These changes occur in response to activation or inactivation of ion transport proteins that are in turn regulated by protein kinase and phosphatase networks. The kinase network comprises different families, such as CBL-Interacting Protein Kinases (CIPKs). […]

SYO81 regulates root meristem activity via ROS signaling

Lately, reactive oxygen species (ROS) have been recognized as signaling molecules that regulate plant cellular proliferation and differentiation in many areas of the plant, including root tips. Chloroplasts, peroxisomes, and mitochondria are the main cellular compartments for ROS generation in cells. SYNTAXIN OF PLANTS81 in Arabidopsis thaliana (AtSYP81), a SNARE protein, has been suggested to […]