Apoptotic cells attract phagocytes by releasing the lipid mediator lysophosphatidic acid, which functions as a chemoattractant.

TLS Online TPP Program

#Id: 7559

#Unit 6. System Physiology – Plant

Many plant tissues contain the enzyme cytokinin oxidase, which cleaves the side chain from zeatin (both cis and trans), zeatin riboside, iP, and their N-glucosides, but not their O-glucoside derivatives

TLS Online TPP Program

#Id: 7560

#Unit 6. System Physiology – Plant

Cytokinin Primary site of synthesis -- root tips. High concentrations -- immature seeds and developing fruits

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#Id: 7561

#Unit 6. System Physiology – Plant

Biological effects of cytokinins

Removes       Promotes accumulation of G1 cyclins (CycD)

inhibitory

phosphate 

TLS Online TPP Program

#Id: 7562

#Unit 6. System Physiology – Plant

Cytokinin has been linked to the activation of a Cdc25- like phosphatase, whose role is to remove an inhibitory phosphate group from the Cdc2 kinase.  Cytokinins elevate the expression of the CYCD3 gene, which encodes a D-type cyclin

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#Id: 7563

#Unit 6. System Physiology – Plant

Cytokinin binds to the CRE1 receptors to initiate a response that culminates in the elevation of transcription of the type- BARRs/ type- A ARRs. 

TLS Online TPP Program

#Id: 7564

#Unit 6. System Physiology – Plant