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Keeping the shoot above water : submergence triggers antithetical growth responses in stems and petioles of watercress (Nasturtium officinale)

Titelangaben

Müller, Jana T. ; van Veen, Hans ; Bartylla, Malte M. ; Akman, Melis ; Pedersen, Ole ; Sun, Pulu ; Schuurink, Robert C. ; Takeuchi, Jun ; Todoroki, Yasushi ; Weig, Alfons ; Sasidharan, Rashmi ; Mustroph, Angelika:
Keeping the shoot above water : submergence triggers antithetical growth responses in stems and petioles of watercress (Nasturtium officinale).
In: New Phytologist. Bd. 229 (2021) Heft 1 . - S. 140-155.
ISSN 1469-8137
DOI: https://doi.org/10.1111/nph.16350

Volltext

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Abstract

The molecular mechanisms controlling underwater elongation are based extensively on studies on internode elongation in the monocot rice (Oryza sativa) and petiole elongation in Rumex rosette species. Here we characterize underwater growth in the dicot Nasturtium officinale (watercress), a wild species of the Brassicaceae family, in which submergence enhances stem elongation and suppresses petiole growth.

We used a genome‐wide transcriptome analysis to identify the molecular mechanisms underlying the observed antithetical growth responses. While submergence caused a substantial reconfiguration of the petiole and stem transcriptome, only little qualitative differences were observed between both tissues. A core submergence response included hormonal regulation and metabolic readjustment for energy conservation, while tissue‐specific responses were associated with defense, photosynthesis, and cell wall polysaccharides.

Transcriptomic and physiological characterization suggested that the established ethylene, abscisic acid (ABA) and gibberellic acid (GA) growth regulatory module for underwater elongation could not fully explain underwater growth in watercress.

Petiole growth suppression is likely attributed to a cell cycle arrest. Underwater stem elongation is driven by an early decline in ABA and is not primarily mediated by ethylene or GA. An enhanced stem elongation observed in the night period was not linked to hypoxia and suggests an involvement of circadian regulation.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: abscisic acid; antithetical growth; elongation; ethylene; hypoxia; gibberellic acid; submergence; watercress
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie > Lehrstuhl Pflanzenphysiologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie > Professur Pflanzengenetik
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie > Professur Pflanzengenetik > Professur Pflanzengenetik- Univ.-Prof. Dr. Angelika Mustroph
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
500 Naturwissenschaften und Mathematik > 570 Biowissenschaften; Biologie
Eingestellt am: 06 Dec 2019 08:27
Letzte Änderung: 15 Mär 2022 11:33
URI: https://eref.uni-bayreuth.de/id/eprint/53500