Recent Posts

A handshake between auxin and gibberellin in the cambium

Hu et al. demonstrate how the interactions of gibberellin and auxin signaling components regulate cambial activity during wood formation in poplar. By Jian Hu, Changzheng Xu, and Keming Luo  Background: In trees, the vascular cambium is the population of stem cells that laterally divide and as…

ABP1 (it’s back!) binds auxin and signals fast auxin responses (Nature)

One of the longstanding questions in plant biology concernes how auxin coordinates both gene expression in the nucleus and the so-called fast responses at the cell periphery including proton extrusion and cytoskeletal rearrangements. At this point the nuclear branch is well understood, but the cell periphery…

PIF4 enhances DNA binding of CDF2 to co-regulate target gene expression and promote Arabidopsis hypocotyl cell elongation (Nature Plants)

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…

NLP7-CRF-PIN, the nitrate-cytokinin-auxin crosstalk module, conveys root nitrate signals and regulates shoot growth adaptive responses (PNAS)

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…

KAI2 regulates seedling development by mediating light-induced remodeling of auxin transport (New Phytol)

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…

Review. Auxin canalization: From speculative models toward molecular players (Curr Opin Plant Biol)

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…

The main oxidative inactivation pathway of the plant hormone auxin (Nature Comms.)

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…

A role for auxin in flag leaf angle in rice

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…

The role of the microtubule-associated protein WDL4 in apical hook opening

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…