Direct control of shoot meristem activity by a cytokinin-activating enzyme

By T. Kurakawa, Nanae Ueda, M. Maekawa, Kaoru Kobayashi, M. Kojima, Y. Nagato, Hitoshi Sakakibara, J. Kyozuka. Nature, 2007

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Plant hormones are versatile chemical regulators of plant growth. (2009, background): “Active cytokinins are produced by a phosphoribohydrolase enzyme that converts the nucleotide to the free bas”
Cytokinin Regulates the Activity of Reproductive Meristems, Flower Organ Size, Ovule Formation, and Thus Seed Yield in Arabidopsis thaliana[C][W][OA] (2011, background): “In rice (Oryza sativa), disruption of an enzymatic activation step of cytokinin by the log mutation caused the arrest of SAM activity (Kurakawa et al., 2007).”
Genetic Regulation of Shoot Architecture. (2018, background): “Mutations in Gn1a/OsCKX2, DROUGHT AND SALT TOLERANCE, or LONELY GUY (which encodes a CK-activation enzyme) could lead to altered CK distribution in IMs and consequently change the IM and rachis-branch meristem activities (5, 82, 88).”
Natural variation at the DEP1 locus enhances grain yield in rice (2009, background): “The activity of axillary meristem in the shoot apex is important for the determination of the extent of panicle branching and hence grain numbe”
REVIEW: PART OF A SPECIAL ISSUE ON THE PLANT CELL CYCLE Auxin, cytokinin and the control of shoot branching (2011, background): “The gene family was ﬁrst identiﬁed in rice (Kurakawa et al. , 2007).”