Abscisic acid (ABA) is known as stress hormone. Apart from its role in plant growth and development, it is widely studied due to its involvement in biotic and abiotic stresses. Although it had been studied for such a long time, a sensitive spatiotemporal marker for ABA is still elusive. Wu et al. developed an ABA […]
The flower is one of the most important organs of a plant as it provides fruits and seeds. Due to its economic value, flowers are studied extensively to understand its developmental process. Based on the popular ABC model of flower development, floral organ development is mostly regulated through the interaction of MADS box family of […]
Phosphorylation and de-phosphorylation are fundamental events for signal transduction. Phytohormone and light signaling are no exception in this case. Plants face towards light by creating lateral auxin gradient between exposed and shaded sides. This asymmetric auxin distribution is mediated through auxin transporter PIN-FORMED (PIN) proteins. One possible mechanism is the regulation of PIN protein through […]
When cytokinin binds to its receptor AHKs (Arabidopsis Histidine Kinase), the signal is transduced through AHPs (Arabidopsis Histidine-containing Phosphotransfer protein) and eventually to type-B ARRs (Arabidopsis Response Regulators) transcription factors (TFs). Type-B ARR TFs mediate the primary cytokinin response, but the cytokinin response also acts through other TFs in different cellular contexts. In this article, […]
RAB proteins are membrane-anchored proteins that coordinate and regulate vesicle trafficking. Plants contain two group of RAB5 proteins, canonical (ARA7, RHA1) and plant-specific (ARA6), which share a common activator, VPS9A (Vacuolar Protein Sorting 9A). Ito et al. used an activated (GTP-bound) version of the plant-specific ARA6 to find interacting partner proteins. From that screening, they […]
a short review from Hokkaido, Japan This year’s annual meeting of Japanese Society of Plant Physiologists (JSPP) was in the northern part of Japan, Sapporo city, from 28 – 30 March. It’s comparatively colder region compared to the last year’s venue, Kagoshima. Sapporo is the capital of Hokkaido and famous for beer and skiing resorts. The exact conference venue […]
Cell wall is the outermost boundary for a cell. For the protection of cell, it maintains its rigidity. At the same time, for providing the shape of cells, it is capable of becoming flexible. This means that the cell wall has the capacity to maintain both rigidity and flexibility based on the requirement. Auxin is […]
Transcription factor GRFs (GROWTH-REGULATING FACTOR) are specifically expressed in TACs (transit-amplifying cells) and promote rapid cell divisions. Their expression is repressed in stem cells through miR396. In this work, they studied the functions of small cofactors known as GIFs (GRF-INTERACTING FACTORs) for maintaining meristem size and root development. Arabidopsis has three members (GIF1/AN3, GIF2, and […]
So far we know that light inhibits hypocotyl cell elongation and that the master regulatory plant hormone auxin induces hypocotyl elongation. Light signal depends on cryptochrome (CRY1) and phytochrome (PhyB). Auxin signal follows the traditional TIR1/AFB receptor-mediated degradation of AUX/IAA repressor. In this article, they have figured out the underlying molecular mechanism for hypocotyl growth […]