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Cytokinin-Deficient Transgenic Arabidopsis Plants Show Multiple Developmental Alterations Indicating Opposite Functions of Cytokinins in the Regulation of Shoot and Root Meristem Activity Article,…
TLDR
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.
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Regulation of plant growth by cytokinin
TLDR
It is suggested that cytokinins are an important regulatory factor of plant meristem activity and morphogenesis, with opposing roles in shoots and roots.
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Diurnal variation of cytokinin, auxin and abscisic acid levels in tobacco leaves.
TLDR
Diurnal variation of cytokinin, auxin, and abscisic acid levels was tested in tobacco leaves and indicated that cytokinIn metabolism is tightly regulated by the circadian clock.
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Distribution, biological activities, metabolism, and the conceivable function of cis-zeatin-type cytokinins in plants.
TLDR
The comprehensive screen of land plants presented here suggests that cisZ-type CKs occur ubiquitously in the plant kingdom but their abundance might correlate with a strategy of life rather than with evolutionary complexity, and their conceivable function as delicate regulators of CK responses in plants under growth-limiting conditions is hypothesized.
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Enhanced drought and heat stress tolerance of tobacco plants with ectopically enhanced cytokinin oxidase/dehydrogenase gene expression
TLDR
Modulation of cytokinin levels may positively affect plant responses to abiotic stress through a variety of physiological mechanisms, and is associated with enhanced stress tolerance of this genotype.
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Regulation of cytokinin content in plant cells
TLDR
Cytokinin conversion to compounds differing in polarity seems to be decisive for their entrapment within the cell and intracellular compartmentation, which affects their metabolic stability.
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The Pseudomonas type III effector HopQ1 activates cytokinin signaling and interferes with plant innate immunity.
TLDR
It is concluded that HopQ1 can activate cytokinin signaling and that moderate activation of cytokin in signaling leads to suppression of FLS2 accumulation and thus defense signaling.
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Changes in Cytokinin Content and Cytokinin Oxidase Activity in Response to Derepression of ipt Gene Transcription in Transgenic Tobacco Calli and Plants
TLDR
The present data indicate the substrate induction of cytokinin oxidase activity in different tobacco tissues, which may contribute to hormone homeostasis.
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Comparison of hormonal responses to heat, drought and combined stress in tobacco plants with elevated proline content.
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The role of cytokinins in responses to water deficit in tobacco plants over-expressing trans-zeatin O-glucosyltransferase gene under 35S or SAG12 promoters.
TLDR
Both CKs and auxin play a role in root response to severe drought, which involves the stimulation of primary root growth and branching inhibition, and a gradient of bioactive CKs in favour of upper leaves is established during drought stress, which might be beneficial for the preferential protection of these leaves.
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