Re: Hosta Genetics: Marcotrigiano on Hosta Sports

Andrew,

I note that you, as a member of hosta-open,  used my post of yesterday
to hosta-open , entitled "Old Posts Make Good Reading " as a posting  "
offered" by Jim Hawes to your HostaHaven forum. This is incorrect. I
offered it freely to hosta-open readers for their potential  benefit,
not your Forum.. You "borrowed" it without permission, "edited"  it
without permission and "corrupted"  it in such a way as to prevent
readers from determining what words were Marcotrigiano's and what words
were mine. Are  you not aware that this is quite unethical and unfair to
Marcotrigiano? Since you have deliberately eliminated all signal marks
used to indicate what was copied and what was new material in the
posting , this corruption of the text , used without quotation marks
which are necessary to indicate attribution to the original  author,
represents a type of editing which violates good editorial principles
and borders on plagiarism.

Until you learn what is ethical and what is not, you are going to have
serious trouble as a moderator in achieving confidence with readers and
other participants ( if you have any) in your  HostaHaven  Forum . This
blunder on your part is unconscionable. I request  that in the future,
you desist and do not involve me in any way with your tricky
editorializing as an administrator/moderator  within your Forum. I am
not a participant in your Forum and have indicated to you that I  do not
wish to be. Please respect my wishes.

Jim Hawes

Jim Hawes


"HostaHaven.com Forum" wrote:

> ------------------------------------------------------------
> HostaHaven.com Forum: Hosta Genetics: Marcotrigiano on Hosta
> Sports
> ------------------------------------------------------------
>
> By Andrew Lietzow (Admin) on Friday, April 06, 2001 - 08:08
> am:
>
> The following posting was offered by Jim Hawes on 01.04.06
> to help explain Hosta sports, as reported to him by Michael
> Marcotriagiano (Prof. at Univ. of Mass) on March 18, 1999.
>
> >My inquiry to Dr. Marcotrigiano, addressed openly to the
> plant tc listserve to benefit the entire readership is,
> COULD YOU DESCRIBE THE CAUSAL FACTORS for these unique,
> morphological variants found both in gardens and in tc labs?
> ----------------------------
> It's difficult to say since many mutants with the same type
> of variegation have different genetic mechanisms controlling
> the phenotype. In general streaked and striated leaves
> represent unsorted plastid mutants where some cells have
> white plastids, some green, and some mixed. The mixed keep
> sorting giving a pattern of blotches or streaks. The
> mutation is in the plastid not the nucleus. In maternally
> inherited species, the streaked plants produce some eggs
> which have normal and defective proplastids and can give
> rise to a proportion of variegated seedlings.
>
> If your variegated seedlings sort out to Mendelian ratios
> (e.g 3:1), I would not expect my above explanation but
> rather a nuclear gene causing plastid destruction as in
> japonica 1 striping of maize.
>
> They have been called by some in the scientific literature,
> mosaic type variegation plants, suggesting they may not be
> chimeras. Mosaic types vs. chimeras can be a matter of
> semantics. To me a chimera is a mosaic where the mutant and
> non-mutant cells coexist in the shoot apical meristem and
> continue to give rise to mosaic organs.
>
> They appear to me to be chimeras, since they are streaked
> when they are juvenile but they (new divisions from
> rhizomes) readily change to mericlinal and periclinal
> chimeral forms as well as monocolored forms when they
> mature. Could you comment please to allow a tc lab operator
> to benefit by a better understanding of morphological and
> histological changes that may be occurring in these bud
> sports when tc'ing hostas?
>
> The ONLY way to assure that a stable marginal type of
> chimeral leaf pattern is maintained is through the recovery
> of plants from preformed buds in the leaf axils.
> Adventitious shoots can be non-chimeral, totally white or
> green. Or some new types may appear. With very rapid
> proliferation even buds in the leaf axil can divide very
> rapidly, become smaller and smaller and therefore be less
> stable. So, the propagation of stable periclinal chimeras in
> tissue culture is difficult at best.
>
> The streaked kinds where cells may be green, white, or mixed
> plastid should give rise to many streaked plants from
> culture. But remember, TC results in rapid proliferation so
> once something goes wrong (or right) it will result in many
> cultures with the same type.
>
> Hope this helps. Since I am off the TC listserv for awhile
> anyone wishing to discuss this further should email me
> privately.
>
> >>Thank You.
>
> You are welcome
>
> >Jim Hawes
> >Potomack Tree Farm
> >hawesj@gcnet.net
>
> Posted 01.04.06 by {a*@microanswers.net,Andrew
> L.}
>
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