On Fri, 5 Aug 2005 19:33:59 +0100, "Brian" ---
'flayb' to respond wrote:

This is totally as expected. The tie is stopping 'food' manufactured in
the leaves reaching below the constriction via the phloem [bark] whereas
water and minerals from the roots travels unhindered upwards, via the xylem
[wood] Hence the roots and parts below the tie are being starved and would
eventually die, killing the whole plant as they would lose the ability to
'send' water etc.upwards. However the cambium [forms phloem and xylem] has
the ability to grow sufficiently to bridge the gap and permit survival; if
the gap is not too great
.Best Wishes Brian.

Fascinating! Thanks for that, Brian.


--
Chris

E-mail: christopher[dot]hogg[at]virgin[dot]net