hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

Unauthorized use of a plant doesn't invalidate it's patent

RSS story archive

Re: Chirality

  • Subject: Re: Chirality
  • From: Alistair Hay <ajmhay@hotmail.com>
  • Date: Wed, 26 Oct 2011 18:00:13 +1100

It is presumably related to the direction of the phyllotactic spiral of the whole shoot.  It is perhaps the same phenomenon as the scars on the trunks of Philodendron Sect. Meconostigma, which are shaped either like  fat '6's or fat 'd's.

> Date: Tue, 25 Oct 2011 12:59:25 -0500
> From: Thomas.Croat@mobot.org
> To: aroid-l@www.gizmoworks.com
> Subject: Re: [Aroid-l] Chirality
> Dear Ted:
> I was once convinced that the direction of opening was important but a
> big survey we did with the way leaves opened proved that this appears to
> be perhaps totally at random.
> Tom
> -----Original Message-----
> From: aroid-l-bounces@www.gizmoworks.com
> [mailto:aroid-l-bounces@www.gizmoworks.com] On Behalf Of Theodore Held
> Sent: Monday, October 24, 2011 12:46 PM
> To: Discussion of aroids
> Subject: [Aroid-l] Chirality
> Dear List,
> Attached here (with luck) is a picture I made of a pair of blooms from
> a Cryptocoryne griffithi (identity confirmed by Peter Boyce at the
> recent IAS show). What's interesting to me is that the outer spathe
> tip (called the flag for Crypts) of the plants twists to the left for
> one and to the right for the other. These plants are vegetative kin.
> I have also seen the pairing of left-handed and right-handed
> inflorescences on Cryptocoryne pontederifolia.
> Has anyone ever noticed mirror-image flower forms like this with any
> other aroids? In chemistry differences involving only mirror images
> are referred to as chiral isomers and originate with subtle
> molecular-level geometry. In normal life this is called "handedness."
> In a plant bloom, the differences may display as macroscopic
> phenomena, but likely originate with early development, also perhaps
> on a molecular level.
> Please enlighten me if anyone knows about this oddity.
> Ted Held.
> _______________________________________________
> Aroid-L mailing list
> Aroid-L@www.gizmoworks.com
> http://www.gizmoworks.com/mailman/listinfo/aroid-l
Aroid-L mailing list

  • References:
    • Chirality
      • From: Theodore Held <oppenhauser2001@gmail.com>
    • Re: Chirality
      • From: "Tom Croat" <Thomas.Croat@mobot.org>

Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index

 © 1995-2015 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement