Recent Posts

Ethylene-mediated nitric oxide depletion pre-adapts plants to hypoxia stress (Nature Comms)

Climate projection models predict an increasingly wetter world with frequent and severe flooding events, causing loss of crops. As it is for other organisms, it is a challenge for plants to stay under water for long periods. However, how plants react to submergence is poorly understood. Environmental…

Nuclear-cytoplasmic partitioning of ARF proteins controls auxin responses ($) (Mol Cell)

ARF (Auxin Response Factor) transcription factor proteins contain three domains: an N-terminal DNA-binding domain, a variable middle region, and a C-terminal PB1 domain. Powers et al. found that ARF7 and ARF19 accumulate as large-order assemblies in the cytoplasmic region of mature root cells, but the…

Review. Fellowship of the rings: a saga of strigolactones and other small signals (New Phytol)

Strigolactones are small signal molecules synthesized by plants. In the past few years, many studies highlighting the importance of this emerging phytohormone have been published. Strigolactones play important roles as a hormonal signals in plants and for mycorrhizal fungi interactions, they are present…

Epigenetic silencing of a multifunctional plant stress regulator EIN2 (eLIFE)

EIN2 is a key regulator of the ethylene response and a protein with a complex function and regulation. Zander et al. have uncovered an interesting and complex mechanism by which its expression is regulated. Many genes are regulated through histone modifications, with the histone variant H2A.Z and the…

Jasmonate-related MYC transcription factors are functionally conserved in Marchantia polymorpha ($) (Plant Cell)

In recent years, studies in the model bryophyte Marchantia polymorpha have provided insights on how the Jasmonic Acid (JA) pathway works in early diverging land plants, starting from its biosynthesis (Yamamoto et al., 2015; Koeduka et al., 2015), followed by perception (Monte et al, 2018) and co-repressor…

A positive feedback loop of LHW-TMO5 and local auxin biosynthesis in vascular development ($) (Plant Cell Physiol)

Proper development of root vascular tissue is necessary for plant growth, as these tissues are responsible for nutrient and water uptake. Multiple key players including transcriptional factors (TF) and hormones are involved in vascular development. In this paper Ohashi-Ito et al. have identified a feedback…

A KNOX-cytokinin regulatory module predates the origin of indeterminacy (Curr. Biol.)

In vascular plants, new organs (e.g., leaves) are produced continuously from the shoot meristem, a process coined indeterminacy. The sister lineage of vascular plants, bryophytes, develop differently, ending with the formation of a determinate spore-bearing shoot (sporangium). The genetic underpinning…

Cytokinin functions as an asymmetric and anti-gravitropic signal in lateral roots (Nature Comms)

Lateral roots help plants to explore the soil and environmental conditions. Waidmann et al. took advantage of natural variants to understand lateral growth angle by analyzing gravitropic set point angle (GSA). Using Col-0 as a reference, lines that over- or under-respond (steeper or shallower root angle)…

ABCB21 regulates auxin levels in cotyledons, pericycle and leaves (Frontiers Plant Science)

Auxin activity is maintained through regulated biosynthesis, metabolism and transport. In this paper Jenness et al. characterized the physiological significance of a known IAA transporter, ABCB21 (ATP BINDING CASSETTE TRANSPORTER subfamily B member 21) in Arabidopsis. ABCB21 transports shoot derived…