Recent Posts

Nanoscale movements of cellulose microfibrils in primary cell walls ($)

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Cell walls are complex mixtures of cellulose microfibrils, proteins and other materials. Their mechanical properties can be measured and modeled, but it is not always simple to translate these measurements to changes at the molecular level. Zhang et al. used atomic force microscopy to provide an unprecedented…

SPLICEd in the Seeds: Integration of ABA and Light Signaling in Arabidopsis

Dhineshkumar Thiruppathi 1,2  ORCID ID: 0000-0002-2018-3356 Donald Danforth Plant Science Center, Saint Louis, Missouri 63132 1Author for contact: dthiruppathi@danforthcenter.org 2Lead author Plant development and adjustment to the environment require not only tight regulation of core…

Dual-sensing genetically encoded fluorescent indicators, ABA and second messenger dynamics (Plant Cell)

Responses to a changing environment require an interplay between primary and secondary messengers. Hormones like abscisic acid (ABA), auxin etc. act as a primary messengers, whereas molecules like Ca2+, reactive oxygen species (ROS), other cations and anions act as a secondary messenger. In this paper,…

Post germination seedling establishment by ABA in response to light (Plant J.)

Abscisic acid (ABA), is implicated in reversible inhibition of seed germination (emergence of radicle) and post-germination seedling establishment (formation of green open cotyledons) during unfavorable conditions. Yadukrishnan et al. analyzed the role of light in ABA- mediated inhibition of post germination…

A new player links ABA biosynthesis and signaling with seed dormancy

Liu et al. identify new connections between known regulators of seed dormancy, acting through modulation of ABA biosynthesis and signaling. The Plant Cell (2020) https://doi.org/10.1105/tpc.20.00026 By Fei Liu and Yong Xiang, Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome…

DRT111/SFPS splicing factor controls ABA sensitivity during seed development and germination (Plant Physiol)

Abscisic acid (ABA) acts on different plant physiological and developmental processes by quite complex mechanisms. In fact, some of these processes interact with light signaling and some are controlled by alternative splicing. In this paper, Punzo et al. show that DRT111 – a splicing factor previously…

The M3Ks, a missing component discovered in the early ABA core signaling module (Nature Comms)

About a decade ago, the ABA receptors [PYR-ABACTIN RESISTANCE (PYR/PYL)/REGULATORY COMPONENT OF ABA RECEPTOR (RCAR)] were discovered, establishing the PYL-PP2C-SnRK2s core signalling module, in which ABA-binding to PYR/PYL receptors inhibits PP2C phosphatases, leading to activation of SnRK2 kinases,…

Persulfidation-controlled guard cell ABA signaling

Shen et al. explore the role of H2S signaling and the reversible modification persulfidation in guard cell signaling. https://doi.org/10.1105/tpc.19.00826 Yanjie Xie; Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China. Background:…

Make, Modify, Move: Multilayered Regulation of ONAC054 During ABA-Induced Leaf Senescence

‘Senescence’ originates from the Latin word senescere, to grow old. However, the process of leaf senescence is not simply the passive death of the leaf but instead represents an active and highly regulated process of nutrient remobilization from older leaves into developing parts of the plant to…

Rapid changes: ABA-independent SnRK2s target mRNA decay

Magda Julkowska Magdalena.Julkowska@kaust.edu.sa   In response to stress, secondary messengers and rapid and reversible protein phosphorylation contribute to signaling cascades that generate unique signatures indicating stress type and severity. Activation of stress-induced signaling cascades…