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ContentSnapshots, Annals of Botany, Volume 107, Issue 7, May 2011, Pages i–iii, https://doi.org/10.1093/aob/mcr113
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G2/M transition of the plant cell cycle (Viewpoint)
doi:10.1093/aob/mcr055
The G2/M transition in the plant cell cycle is currently steeped in controversy and alternative models. In this viewpoint, Francis (pp. 1065–1070) considers the extent to which the transition is phosphoregulated by WEE1 kinase and CDC25 phosphatase, and presents an argument that environmental stress is the norm for higher plants in temperate conditions. Thus, the repressive role that WEE1 has under checkpoint conditions might be part of the normal cell cycle for many proliferative plant cells, and meristematic cells only escape checkpoint conditions when favourable growth conditions arise.
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Regulatory dephosphorylation of CDK at G2/M (Review)
doi:10.1093/aob/mcr016
The study of the regulation of the cell cycle by cyclin-dependent kinases (CDKs) in plants has lagged behind that of other eukaryotes. Lipavská et al. (pp. 1071–1086) review recent work and focus on tobacco, Nicotiana tabacum, expressing yeast Spcdc25, which exhibits significant changes in morphological and biochemical characteristics along with increased CDK dephosphorylation at G2/M. The observed cytokinin-like effects of Spcdc25 expression are consistent with the concept of interaction between cell cycle regulators and phytohormones during plant development.