Journal ArticleDOI
Cytokinin metabolism and action
David W. S. Mok,Machteld C. Mok +1 more
- Vol. 52, pp 89-118
TLDR
This review centers on cytokinin metabolism with connecting discussions on biosynthesis and signal transduction, and important findings are summarized with emphasis on metabolic enzymes and genes.Abstract:
■ Abstract Cytokinins are structurally diverse and biologically versatile. The chemistry and physiology of cytokinin have been studied extensively, but the regulation of cytokinin biosynthesis, metabolism, and signal transduction is still largely undefined. Recent advances in cloning metabolic genes and identifying putative receptors portend more rapid progress based on molecular techniques. This review centers on cytokinin metabolism with connecting discussions on biosynthesis and signal transduction. Important findings are summarized with emphasis on metabolic enzymes and genes. Based on the information generated to date, implications and future research directions are presented.read more
Citations
More filters
Journal ArticleDOI
Phosphorus acquisition and use: critical adaptations by plants for securing a nonrenewable resource
TL;DR: Physiological, biochemical, and molecular studies of white lupin and other species response to P-deficiency have identified targets that may be useful for plant improvement, and Genomic approaches involving identification of expressed sequence tags found under low-P stress may also yield target sites for plant improved.
Journal ArticleDOI
Cytokinin Oxidase Regulates Rice Grain Production
Motoyuki Ashikari,Hitoshi Sakakibara,Shaoyang Lin,Toshio Yamamoto,Tomonori Takashi,Asuka Nishimura,Enrique R. Angeles,Qian Qian,Hidemi Kitano,Makoto Matsuoka +9 more
TL;DR: It is shown that a QTL that increases grain productivity in rice, Gn1a, is a gene for cytokinin oxidase/dehydrogenase (OsCKX2), an enzyme that degrades the phytohormone cytokinIn.
Journal ArticleDOI
Cytokinin-Deficient Transgenic Arabidopsis Plants Show Multiple Developmental Alterations Indicating Opposite Functions of Cytokinins in the Regulation of Shoot and Root Meristem Activity
TL;DR: The results are consistent with the hypothesis that cytokinins have central, but opposite, regulatory functions in root and shoot meristems and indicate that a fine-tuned control of catabolism plays an important role in ensuring the proper regulation of cytokinin functions.
Journal ArticleDOI
CYTOKININS: Activity, Biosynthesis, and Translocation
TL;DR: Recent findings on the relationship between CK structural variation and activity, distinct features in CK biosynthesis between higher plants and Agrobacterium infected plants, CK translocation at whole-plant and cellular levels, and CKs as signaling molecules for nutrient status via root-shoot communication are summarized.
Journal ArticleDOI
Sugar Sensing and Signaling in Plants
TL;DR: In addition to their essential roles as substrates in carbon and energy metabolism and in polymer biosynthesis, sugars have important hormone-like functions as primary messengers in signal transduction.
References
More filters
Journal ArticleDOI
Communication modules in bacterial signaling proteins.
John S. Parkinson,Eric Kofoid +1 more
Journal ArticleDOI
Arabidopsis ethylene-response gene ETR1: similarity of product to two-component regulators
TL;DR: An early step in ethylene signal transduction in plants may involve transfer of phosphate as in prokaryotic two-component systems.
Journal ArticleDOI
Identification of CRE1 as a cytokinin receptor from Arabidopsis
Tsutomu Inoue,Masayuki Higuchi,Yukari Hashimoto,Motoaki Seki,Masatomo Kobayashi,Tomohiko Kato,Satoshi Tabata,Kazuo Shinozaki,Tatsuo Kakimoto +8 more
TL;DR: Evidence is provided that cytokinins can activate CRE1 to initiate phosphorelay signalling, and this work identifies Arabidopsis cre1 (cytokinin response 1) mutants, which exhibited reduced responses to cytokinin responses.
Journal ArticleDOI
Cytokinin Activation of Arabidopsis Cell Division Through a D-Type Cyclin
TL;DR: Results suggest that cytokinin activates Arabidopsis cell division through induction of CycD3 at the G1-S cell cycle phase transition.