Division of Labor during Apical Hook Formation

Farquharson, Kathleen L.

doi:10.1105/tpc.17.00357

Cited by 2 publications

(2 citation statements)

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“…PIN3 facilitates the auxin flow from vascular tissues to outer cortex and epidermis, whereas PIN4 and 7 support the auxin flow from vascular tissue to cortex and epidermis. In addition, ABCB transporter 1 and 19 which are localized at inner epidermal cells of the hook, steer the auxin transport to the convex side ( Vandenbussche et al, 2010 ; Wu et al, 2010 ; Žádníkova et al, 2010 , 2016 ; Farquharson, 2017 ; Wang and Guo, 2018 ). The maintenance of differential auxin gradient involves the co-ordination of auxin synthesis, transport and signaling.…”

Section: Hormonal Regulation Of Plant Development In Darkmentioning

confidence: 99%

Dark-Induced Hormonal Regulation of Plant Growth and Development

et al. 2020

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The sessile nature of plants has made them extremely sensitive and flexible toward the constant flux of the surrounding environment, particularly light and dark. The light is perceived as a signal by specific receptors which further transduce the information through the signaling intermediates and effector proteins to modulate gene expression. Signal transduction induces changes in hormone levels that alters developmental, physiological and morphological processes. Importance of light for plants growth is well recognized, but a holistic understanding of key molecular and physiological changes governing plants development under dark is awaited. Here, we describe how darkness acts as a signal causing alteration in hormone levels and subsequent modulation of the gene regulatory network throughout plant life. The emphasis of this review is on dark mediated changes in plant hormones, regulation of signaling complex COP/DET/FUS and the transcription factors PIFs which affects developmental events such as apical hook development, elongated hypocotyls, photoperiodic flowering, shortened roots, and plastid development. Furthermore, the role of darkness in shade avoidance and senescence is discussed.

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Section: Hormonal Regulation Of Plant Development In Darkmentioning

confidence: 99%

Dark-Induced Hormonal Regulation of Plant Growth and Development

et al. 2020

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show abstract

“…3A). This asymmetrical cell expansion is caused by an auxin maximum in the concave part of the hook, created by auxin influx and outflux carriers (AUXIN1 [AUX1] and LIKE-AUX1, and PIN-FORMED [PIN] proteins, respectively) in the epidermal cells of the young hypocotyl (Box 2; Zádníková et al, 2010Zádníková et al, , 2016Farquharson, 2017). In darkness, PHYTOCHROME INTERACTING FACTORs (PIFs; Box 1; reviewed in this Focus Issue by Pham et al, 2018) enhance auxin synthesis and signaling, and the synthesis of two other important hormones in hook formation and maintenance, ethylene (ET) and gibberellic acid (GA; Box 2; for review, see Mazzella et al, 2014).…”

Section: The Apical Hookmentioning

confidence: 99%