Recent Posts

Two opposing pathways independently regulate symbiotic nodulation in Medicago truncatula ($) (Plant Physiol)

To optimize usage of nutrient, legumes utilize multiple strategies to regulate root nitrogen-fixing symbiotic nodulation. Excessive nodulation may hamper plant’s normal growth, so fine-tuning it is important for plant survival. Laffont et al. report that there are two independent pathways systematically…

Leaf senescence in Arabidopsis thaliana is regulated by a histone H3K4 demethylase (Plant Cell)

Leaf senescence is the final stage of leaf development where the organ turns yellow and programmed cell death occurs. While it is generally understood that the regulation of senescence associated genes (SAGs) is dependent on the trimethylation of histone H3 at lysine 4 (H3K4me3), the exact mechanism…

(Auxin) Don't stop me now. Auxin export from proximal fruits drives arrest in competent inflorescence meristems (bioRxiv)

The control of the beginning and the ending of the reproductive phase in plants are important factors related to seed and fruit production. Almost one century ago, it was noticed that fruit removal delays the floral arrest, and a model was proposed in 1994 by Hensel et al., highlighting the role of fruits…

Chloroplast status can affect shade avoidance in plants ($) (Plant Cell)

For optimal photosynthetic performance, plants utilize multiple strategies to compete with their neighbors. Especially when light supply is limited in the canopy, plants promote their own elongation to overgrow neighboring plants. This occurs as a response to a low ratio of Red to Far-Red light (R/FR),…

A regulatory circuit conferring varied flowering response to cold in annual and perennial plants ($) (Science)

Regulation of flowering in time and space in perennials like Arabis alpina involves two systems. One uses orthologs to FLOWERING LOCUS C (FLC) from A. thaliana; in A. alpine is called PERPETUAL FLOWERING 1 (PEP1) and its repression enables flowering after vernalization. The other system uses microRNA156…

Leaf age dictates abiotic versus biotic stress signalling in Arabidopsis (PNAS)

Plants sense and respond to various external stimuli throughout their lifespan. During stress responses brought forth by abiotic or biotic factors, molecular and physiological adjustments mediated by distinct yet interconnected hormone pathways play critical roles in plant survival. Berens et al. investigate…

Root branching toward water involves posttranslational modification of transcription factor ARF7 ($) (Science)

Roots do amazing things, particularly in terms of how they optimize their growth in response to their very local environment including water, nutrients, microbes, and physical obstructions. Branching in regions of contact with water is called hydropatterning, and previous studies showed that an auxin…

New Teaching Tool: "Molecular Control of Plant Shoot Architecture"

We’re excited to announce the publication of The Plant Cell’s latest Teaching Tool, “Molecular Control of Plant Shoot Architecture,” by Agustin Zsögön and Lázaro E. P. Peres, available without subscription at Plantae.org. Manipulation of plant form and height has been instrumental in…

CONSTITUTIVE TRIPLE RESPONSE 1 and PIN2 coordinately regulate indeterminate root growth (Plant Sci)

Méndez-Bravo et al. explored the mechanism for the dramatic phenotype of the ctr1 mutant (CONSTITUTIVE TRIPLE RESPONSE 1), which inhibits both cell division and elongation. In the ctr1-1 mutant background, auxin response is induced at the root tip and an increase in expression of the auxin transporter…