IUBio Biosequences .. Software .. Molbio soft .. Network News .. FTP

[Agroforestry] End-of-Day far-red for control of branching

Paul Austin PAustin at hortresearch.co.nz
Thu Nov 3 00:05:39 EST 2005


I am interested to know if anyone has had experience using EoD far-red
as a tool to reduce branching in seedling trees.

I have several families of seedling apples growing under a controlled
environment regime - high light, long days, high CO2, high temperature,
root restriction, PGR to reduce internode extension. This regime induces
very high levels of vigour, but has the down-side of inducing every
lateral to branch, and branches to form on those branches, if we let
them! A large waste of biomass and labour.

Any suggestions? Initial experience indicates that "titrating" the EoD
FR to avoid terminal bud set makes this strategy difficult, if not
impossible, and a means of inducing a "shade avoidance" response while
providing high irradiance. Removing the blue end of the spectrum is not
really an option, as this reduces leaf chlorophyll, and photosynthesis.



Scientist, HortResearch Palmerston North Research Centre
Private Bag 11-030
Palmerston North, NEW ZEALAND
Tel. 6-356-8080 ext 7774   mob. 0275747077


The contents of this e-mail are privileged and/or confidential to the
named recipient and are not to be used by any other person and/or
organisation. If you have received this e-mail in error, please notify
the sender and delete all material pertaining to this e-mail.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.bio.net/bionet/mm/ag-forst/attachments/20051103/4ec3e867/attachment.html

More information about the Ag-forst mailing list

Send comments to us at biosci-help [At] net.bio.net