|
Home > Archive > UK gardening > June 2007 > Pinching out freesias
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
| Author |
Pinching out freesias
|
|
|
| Does anyone happen to know why it is that pinching out the very tip of
freesia and gladiolus flowers causes them to open more fully? It's of no
huge importance but I was doing it yesterday (wedding flower arranging) and
suddenly realised I do it but don't know why! There must be some
'mechanism' in the plant that's triggered, perhaps?
--
Sacha
http://www.hillhousenursery.co.uk
(remove weeds from address)
| |
| Emrys Davies 2007-06-28, 9:25 am |
| "Sacha" <sacha@gardenweeds506.fsnet.co.uk> wrote in message
news:C2A9131B.50EC5%sacha@gardenweeds506.fsnet.co.uk...
> Does anyone happen to know why it is that pinching out the very tip of
> freesia and gladiolus flowers causes them to open more fully? It's of
no
> huge importance but I was doing it yesterday (wedding flower
arranging) and
> suddenly realised I do it but don't know why! There must be some
> 'mechanism' in the plant that's triggered, perhaps?
>
> --
> Sacha
> http://www.hillhousenursery.co.uk
> (remove weeds from address)
Presumably the 'stopping' of a plant ensures that its energies are
concentrated on the production of flowers/fruit or side growths, as is
the case with tomatoes.
Regards,
Emrys Davies.
| |
| Dave Poole 2007-06-28, 9:25 am |
| Emrys wrote:
> Presumably the 'stopping' of a plant ensures that its energies are
> concentrated on the production of flowers/fruit or side growths, as is
> the case with tomatoes.
Plant growth, including flowering and fruiting is regulated by
hormones present within the plant. Some encourage growth while others
impede development. There's a constant and intricate interplay of
growth enhancers and growth repressants, which coordinate the plant's
development. Apical dominance, (the condition whereby a growing shoot
does not branch unless 'pinched-out') is the result of auxins in the
bud tip. These ensure that lateral buds do not commence growth too
soon and crowd out the growing tip. By pinching out the tip, the
auxins are removed and lateral buds can start to grow.
Similarly, auxins are sometimes present at the extreme tips of flower
racemes (spikes) especially In plants that open their flowers
successionally. The development of the buds is affected by the
concentration of auxins, those closest to the source being more
heavily repressed than those furthest away. As the flower spike
elongates, the distance between the older buds and the auxin laden tip
increases, enabling them to expand and open. The removal of the auxin
laden tip can cause all remaining buds to open more or less
simultaneously. Hope that makes sense.
| |
|
| On 28/6/07 12:05, in article 468395c0$1_4@mk-nntp-2.news.uk.tiscali.com,
"Emrys Davies" <me@privacy.net> wrote:
> "Sacha" <sacha@gardenweeds506.fsnet.co.uk> wrote in message
> news:C2A9131B.50EC5%sacha@gardenweeds506.fsnet.co.uk...
> no
> arranging) and
>
> Presumably the 'stopping' of a plant ensures that its energies are
> concentrated on the production of flowers/fruit or side growths, as is
> the case with tomatoes.
>
> Regards,
> Emrys Davies.
>
>
But these are *cut* flowers, ready to go into an arrangement etc. etc.
--
Sacha
http://www.hillhousenursery.co.uk
(remove weeds from address)
| |
| Emrys Davies 2007-06-28, 8:25 pm |
| "Sacha" <sacha@gardenweeds506.fsnet.co.uk> wrote in message
news:C2A9A74B.50F8E%sacha@gardenweeds506.fsnet.co.uk...
> On 28/6/07 12:05, in article
468395c0$1_4@mk-nntp-2.news.uk.tiscali.com,
> "Emrys Davies" <me@privacy.net> wrote:
>
of[color=darkred]
of[color=darkred]
is[color=darkred]
>
> But these are *cut* flowers, ready to go into an arrangement etc. etc.
> --
> Sacha
> http://www.hillhousenursery.co.uk
> (remove weeds from address)
But I think that the same reasoning would apply whether they have been
cut or about to be cut. As you will no doubt agree flowers/plants
continue to develop/grow a little when they have been cut and placed in
water.
Regards,
Emrys Davies.
| |
| Dave Poole 2007-06-29, 3:25 am |
| Emrys wrote:
> But I think that the same reasoning would apply whether they have been
> cut or about to be cut. As you will no doubt agree flowers/plants
> continue to develop/grow a little when they have been cut and placed in
> water.
Quite right. The presence of auxins in the growing points (stem tips -
flower stems or leafy stems) is not massively affected if they are cut
from the plant and the same processes continue, albeit on a reducing
scale as the cut material deteriorates.
| |
|
| On 29/6/07 07:04, in article
1183097057.024507.174510@n2g2000hse.googlegroups.com, "Dave Poole"
<daverpoole@hotmail.com> wrote:
> Emrys wrote:
>
>
> Quite right. The presence of auxins in the growing points (stem tips -
> flower stems or leafy stems) is not massively affected if they are cut
> from the plant and the same processes continue, albeit on a reducing
> scale as the cut material deteriorates.
>
>
Thank you both. Now I've got the answer I was looking for - it's very
interesting, too. There must be some reverse effect that prevents e.g.
Dahlia buds opening once picked?!
--
Sacha
http://www.hillhousenursery.co.uk
(remove weeds from address)
| |
| Emrys Davies 2007-06-29, 1:25 pm |
| "Sacha" <sacha@gardenweeds506.fsnet.co.uk> wrote in message
news:C2AA7234.51076%sacha@gardenweeds506.fsnet.co.uk...
> On 29/6/07 07:04, in article
> 1183097057.024507.174510@n2g2000hse.googlegroups.com, "Dave Poole"
> <daverpoole@hotmail.com> wrote:
>
been[color=darkred]
placed in[color=darkred]
tips -[color=darkred]
cut[color=darkred]
> Thank you both. Now I've got the answer I was looking for - it's very
> interesting, too. There must be some reverse effect that prevents
e.g.
> Dahlia buds opening once picked?!
>
> --
> Sacha
> http://www.hillhousenursery.co.uk
> (remove weeds from address)
I am told that dahlia buds will open if they are showing colour when
cut.
Regards,
Emrys Davies.
| |
|
| On 29/6/07 18:56, in article 4685479f_4@mk-nntp-2.news.uk.tiscali.com,
"Emrys Davies" <me@privacy.net> wrote:
> "Sacha" <sacha@gardenweeds506.fsnet.co.uk> wrote in message
> news:C2AA7234.51076%sacha@gardenweeds506.fsnet.co.uk...
> been
> placed in
> tips -
> cut
> e.g.
>
> I am told that dahlia buds will open if they are showing colour when
> cut.
>
> Regards,
> Emrys Davies.
>
>
My experience is that they have to have started opening, yes. But they
won't open at all if still tightly shut.
--
Sacha
http://www.hillhousenursery.co.uk
(remove weeds from address)
|
|
|
|
|