Auxin and cytokinin in pruning

[TreeNinja]

Can anyone briefly describe the effects on pruning in regards to apical and lateral bud growth in relation to the auxin and cytokinin hormones? Im confusing myself. Would be appreciated, thanks

[MATTMOSS]

It depends on what method of pruning work.

The effects vary a great deal between Crown reduction, thinning, pollarding

and also the vitality of the tree will have a great part to play.

[David Humphries]

Auxins are responsible for cell stretching which increases the capacity of the cells to transport nutrients from tip to root, and can be found in leaves, buds & branches.

 

 

Cytokinins are primarily responsible for the division of cells in the root and shoot tips and in the formation of branches

 

 

If you prune branches (removing the branch tips) the cytokinins move down to and concentrate predominantly on root development instead of both root and branch development.

Eventually if the tree is healthy it will look to grow/put on new shoot/branch tissue (meristematic tissue) which will be full of cytokinins hormones.

 

that doesn't really answer your question though, does it read ok and make sense ? It's pretty much what I can recall from assignments.

 

What course are you doing?

 

 

 

 

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