short and long shoots in Pinus

[Curtis Clark]

At 09:14 AM 7/30/99 +1200, David Orlovich wrote:
1. If short shoots are regenerated to grow and produce more needles, will
they ever branch and form long shoots?  I seem to remember a story that
while the meristem could be made to grow again, it would never produce long
shoots.  However, Raven, Evert and Eichhorn (5th and 6th eds) say that
short shoots can be regenerated into entire pine trees.

I hesitate to venture back into the waters, but... I assume you mean Pinus.
Short shoots in Cedrus (at least the deodar cedar that I am familiar with)
not infrequently "go long". I've looked at a fairly large sample of a
smallish number of pine spp. and never seen fascicles continue growth. My
copy of Raven et al. is at work (I'm at home now), but I wonder if they
mean in culture, rather than in situ.


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