Tag: Auxin

Responses to environmental and internal signals require the recruitment of transcription factors (TFs). TFs recognize simple DNA sequences to activate specific genes that will accomplish the required functions. DOF (DNA-binding with one finger) is a large family of plant TFs that encloses the CYCLING…

Nitrate, the prominent form of nitrogen used by most land plants, is a signal regulating plant growth and development. Nitrate sensing by roots not only regulates root development to facilitate nutrient foraging, but also the growth of distant plant organs. Cytokinin is a mobile signal coordinating nitrate…

Seed germination is can be described as having two phases depending on light availability, skoto- and photomorphogenesis. Skotomorphogenesis, which occurs while the seed is still buried, is characterized by the elongation of the coleoptile and the inhibition of the root system. When the seed reaches…

The versatility of roles that the hormone auxin plays led Paque and Weijers to suggest a new meaning to the acronym IAA (originally- Indole Acetic Acid)- ‘Influences Almost Anything’. It is known that PIN-FORMED (PIN) auxin exporters are responsible for cell-to-cell directional auxin flow and auxin…

Auxin is a key hormone in almost all stages of the plant development and its main natural form is  indole-3-acetic acid (IAA). In Arabidopsis, several gene families are involved in auxin homeostasis. In this work, Hayashi et al. focus on the roles of DIOXYGENASE FOR AUXIN OXIDATION 1 (DAO1) which converts…

Author et al. Huang et al. investigate the roles of auxin in flag leaf angle regulation. Plant Cell. https://doi.org/10.1093/plcell/koab175 Guoqiang Huang Joint International Research Laboratory of Metabolic & Developmental Sciences, State Key Laboratory of Hybrid Rice, SJTU-University of Adelaide…

Deng and colleagues show how the microtubule-associated protein WDL4 contributes to apical hook opening to protect seedligns from damage by soil particles  By Jia Deng, Xiangfeng Wang, Ziqiang Liu, and Tonglin Mao, China Agricultural University Background: When seedlings emerge through the soil…

Plasmodesmata, the tubular connections that form continua between neighboring cells in plants, play vital roles in long-distance transport of ions, RNA, proteins, and small molecules. While it is known that plasmodesmata are permeable to phytohormones, including auxin, the physiological significance…