Details

Autor(en) / Beteiligte

• Shinozawa, Akihisa
• Otake, Ryoko
• Takezawa, Daisuke
• Umezawa, Taishi
• Komatsu, Kenji
• Tanaka, Keisuke
• Amagai, Anna
• Ishikawa, Shinnosuke
• Hara, Yurie
• Kamisugi, Yasuko
• Cuming, Andrew C
• Hori, Koichi
• Ohta, Hiroyuki
• Takahashi, Fuminori
• Shinozaki, Kazuo
• Hayashi, Takahisa
• Taji, Teruaki
• Sakata, Yoichi

Titel

SnRK2 protein kinases represent an ancient system in plants for adaptation to a terrestrial environment

Ist Teil von

• Communications biology, 2019-01, Vol.2 (1), p.30-30, Article 30

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2019

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The SNF1-related protein kinase 2 (SnRK2) family includes key regulators of osmostress and abscisic acid (ABA) responses in angiosperms and can be classified into three subclasses. Subclass III SnRK2s act in the ABA response while ABA-nonresponsive subclass I SnRK2s are regulated through osmostress. Here we report that an ancient subclass III SnRK2-based signalling module including ABA and an upstream Raf-like kinase (ARK) exclusively protects the moss from drought. Subclass III SnRK2s from both Arabidopsis and from the semiterrestrial alga , which contains all the components of ABA signalling except ABA receptors, complement mutants, whereas Arabidopsis subclass I SnRK2 cannot. We propose that the earliest land plants developed the ABA/ARK/subclass III SnRK2 signalling module by recruiting ABA to regulate a pre-existing dehydration response and that subsequently a novel subclass I SnRK2 system evolved in vascular plants conferring osmostress protection independently from the ancient system.