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Re: Re: Iris abicans/questions and blather

Here is a copy of the photo of AVIs .Not my photo and hope I don't get shot for reposting it. 

The violet overall colour is the anthocyanin disolved in the cell sap. the darker purple cicles are the AVI structures.

It would seem to be a way of increasing the density of anthocyanin in the flower and should be found where the pigment is dark purple or near black. In albicans their would not likely be any disolved pigment to be seen. For that we need a darker coloured anthocyanin flower. In albicans you should be able  to see basic structure and determine if you had a single layer of flower cells.

I would doubt if university would send me a copy. I hadn't tried accessing on line jounals with my membeship card but perhaps they could let me know if that is possible. The original journal will sell a full copy of the journal article for $30 USA$, but that would buy two new SDB  new introduction from some breeders, at least.

Chuck Chapman


oneofcultivars@aol.com wrote:

>In a message dated 3/29/2005 8:07:40 PM Central Standard Time, 
>irischapman@netscape.net writes:
>
>
>> I need to get over to the university to get a full copy of AVI paper which 
>> would likely have their method detailed or referenced. Without a student 
>> parking pass you have to park about a half mile from the library which always 
>> make this a much longer chore then it need to be. 
>> 
>
>You could maybe call and have them mail you a copy.
>We certainly would be better prepared with a copy of the paper.
>
>I'll need to wait until tomorrow to look at albicans under the scope. They 
>will be blooming here another three weeks.
>Neither do I have a camera ready.
>
>Should we expect to find AVIs in all members of the iris family if they are 
>in any one of them? Or? Has me wonderin' if the pale gray blue tint in albicans 
>bud comes perhaps from the AVIs.
>
>EXCERT: We have termed these structures Anthocyanic Vacuolar Inclusions or 
>AVIs. They are non-membrane bound aggregations of highly pigmented material 
>found ! in the vacuoles of the petal epidermis. The presence of these structures 
>results in intensification in colour and a significant shift in the absorbance 
>spectra of anthocyanins in these cells. 
>
>Plan here for now is to moisten the slide with enough water to hold the 
>specimen in place if it is not moist enough to stay in place without doing so. 
>
>I hit a snag here. I could not find my blank slides. 
>Fine helper I am. Huh?
>Smiles,
>Bill Burleson
>

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