Recent Posts

Auxin regulates shoot stem cells

Auxin and cytokinin play critical roles in determination of cell fate in the shoot apical meristem (SAM). Until now auxin's role was thought to be confined to the peripheral zone (PZ), promoting cell differentiation and organogenesis, mediated by AR5/MP. However, studies using GC-MS have shown the presence…

Releasing the Cytokinin Brakes on Root Growth

Roots explore the soil for available water and nutrients, with deep roots providing water from the lower soil layers (Uga et al., 2015) and highly branched roots searching the soil for less-mobile nutrients such as phosphate, zinc, and manganese. Root architecture results from plant developmental programs,…

How Ethylene Reddens Apples

Ethylene is essential for the ripening of climacteric fruits, and a rapid burst of ethylene production and a rise in respiration occur at the transition to ripening.  In ripening apple (Malus domestica) fruits, the accumulation of anthocyanins that is responsible for reddening is correlated with ethylene…

Jasmonic Acid Inhibits Lateral Root Formation

Architectural modifications of plant root systems enable plants to survive adverse conditions. Lateral roots, for example, help anchor the plant in the soil, and facilitate the uptake of water and nutrients from the soil. Auxin is a plant hormone essential to root development including the elongation…

Lateral root priming synergistically arises from root growth and auxin transport dynamics (bioRxiv)

Root system architecture is primarily determined by branching of the lateral roots. The position of a new lateral root is determined by oscillating auxin concentrations in the main root meristem. To understand the nature of auxin oscillations Van den Berg and ten Tusscher developed a multiscale root…

Review. Out of shape during stress: a key role for auxin

The plant hormone auxin is a major player in determining root growth and architecture, but we are just starting to understand how auxin distribution is altered by abiotic stresses. Kover et al. discuss how the “upside-down fountain” of auxin in the root is affected by abiotic stress conditions. Auxin…

The PILNCR1-miR399 regulatory module is important for low-phosphate tolerance in maize (Plant Physiol.)

Nearly ten years ago, microRNA 399 (miR399) was recognized as a regulator of phosphate (Pi) homeostasis. miR399 expression is induced upon low Pi conditions, and, in Arabidopsis, rice, soybean and barley, miR399 suppresses PHO2, a negative regulator of Pi uptake. Du, Wang, Zou et al. found that contrary…

Rapid and reversible root growth inhibition by TIR1 auxin signalling (Nature Plants)

Auxin mediates many of its effects through transcriptional changes via the well-known interaction between its co-receptors and transcriptional regulators (TIR1/AFB – Aux/IAA), but some auxin responses happen too quickly to be explained by transcriptional changes. Fendrych et al. demonstrate that root…

Advances in the analysis of the molecular mechanism of rice tiller angle regulation in genetic development

Source: Institute of Genetics and Developmental Biology Date: 2018-06-22 【 Title : Xiaozhong University 】(Translated from the original Chinese by Google) The angle of tillering is the angle between the tiller and the main stem of the grass family and is closely related to the crop population.…