Question GRO term

[katica at acoma.Stanford.EDU]

Dear Satoh,

On Wed, 14 Jun 2006, SATOH, Kouji wrote:
....
> I have question for you: you described the callus as embryogenic, does
>> this refer to callus that will give rise to somatic embryos, or
>> to the callus
>> induced from embryo tissue within seed, or both? I don't know
>> enough about
>> callus induction from rice seeds, some clarification would help with
>> defining parent terms for the new term 'embryogenic callus'.
>
> "Embryogenic callus" is the callus is able to generate somatic embryo, does
> not indicate the callus derived from embryo tissue.

OK, 'embryogenic calus' refers to callus with demonstrable morphogenetic 
competence (either organogenesis or embryogenesis). Coincidentally, in the 
particular case of the callus induced from rice seeds, it originated from 
embryonic tissue too (which is relevant for placing the new term under 
proper parent term).

> And I think  "Embryogenic callus" is one of organogenic callus.
> Three type of tissues are generated from callus.They are adventitious shoot,
> root, and embryo(same as soamtic embryo).
> Because plant call has "totipotency".
> Therefore the methods of re-diffrerentiation of plant from callus are two.
> One is direct induced somatic embryo from callus.
> This callus is embryogenic callus
>
> Other is two step method, at first, the induction of adventitious shoot (or
> root), and after that, induced root (or shoot).
> This callus is "organogenic callus"
>
> Can I answer the your question?

Yes, you did. Thank you very much for clarification.
Best regards,

Katica
>
> best regards
> Satoh
>
> ++++++++++++++++++++++++++++++++++++
> SATOH, Kouji (º´Æ£¹ÀÆó) Ph. D
> Unit of Plant Genome Research
> National Institute of Agrobiological Sciences
> Mail: ksatoh at nias.affrc.go.jp
> Tel: 029-838-7007
> ++++++++++++++++++++++++++++++++++++
>
>> -----Original Message-----
>> From: katica at acoma.stanford.edu [mailto:katica at acoma.stanford.edu]
>> Sent: Wednesday, June 14, 2006 2:27 AM
>> To: POC-dev; Pankaj Jaiswal
>> Cc: Shoshi Kikuchi; º´Æ£ ¹ÀÆó
>> Subject: Re: Question GRO term
>>
>>
>> Dear Kikuchi,
>>
>> Pankaj Jaiswal forwarded your request to POC. Currently, we only
>> have term
>> 'cultured callus' and 'cultured embryo' in Plant structure ontology (PSO).
>> New term, embryogenic callus, would need to be introduced to PSO.
>>
>> I have question for you: you described the callus as embryogenic, does
>> this refer to callus that will give rise to somatic embryos, or
>> to the callus
>> induced from embryo tissue within seed, or both? I don't know
>> enough about
>> callus induction from rice seeds, some clarification would help with
>> defining parent terms for the new term 'embryogenic callus'.
>>
>> Also, there are no Growth stage terms for in vitro cultures. Since Plant
>> Growth Stages are pertinent to a whole plant, we intentionally
>> ommitted dealing with staging for tissue culture entities.
>>
>> Best Regards,
>>
>> Katica
>>
>>> Shoshi Kikuchi wrote:
>>>> Dear Pankaj
>>>>
>>>> We are now preparing for the ontology-based description of our
>> full-length
>>>> cDNA clones.
>>>>
>>>> I have a question. What is the appropriate description of embryogenic
>>>> callus. Many of our full-length cDNA libraries are originated from rice
>>>> callus induced from mature seed.
>>>>
>>>> 21 day-old callus after induction on the medium containing
>> 2,4-D as auxin
>>>> from a mature seed.
>>>>
>>>> What kind of GRO term is the most appropriate one?
>>>>
>>>> Sincerely yours,
>>>>
>>>> Shoshi
>>>> ***********************************
>>>> Shoshi Kikuchi Ph.D
>>>> Plant Genome Research Unit
>>>> Division of Genome and Biodiversity Research
>>>> National Institute of Agrobilogical Sciences (NIAS)
>>>> Kan'non dai 2-1-2
>>>> Tsukuba Ibaraki 305-8602 Japan
>>>> TEL/FAX +81-29-838-7007
>>>> Email: skikuchi at nias.affrc.go.jp
>>>> WEB: ¡£¡£(RMOS) http://microarray.rice.dna.affrc.go.jp
>>>>           (KOME) http://cdna01.dna.affrc.go.jp/cDNA/
>>>> ************************************
>>>>
>>>>
>>>
>>>
>>>
>>
>> --
>> --------------------------------------------------------------------------
>> Katica Ilic             		katica at acoma.stanford.edu
>> The Arabidopsis Information Resource 	Tel: (650) 325-1521 ext. 253
>> Carnegie Institution of Washington 	FAX: (650) 325-6857
>> Department of Plant Biology 		URL: http://arabidopsis.org/
>> 260 Panama St.
>> Stanford, CA 94305
>> U.S.A.
>> --------------------------------------------------------------------------
>>
>

-- 
--------------------------------------------------------------------------
Katica Ilic             		katica at acoma.stanford.edu
The Arabidopsis Information Resource 	Tel: (650) 325-1521 ext. 253
Carnegie Institution of Washington 	FAX: (650) 325-6857
Department of Plant Biology 		URL: http://arabidopsis.org/
260 Panama St.
Stanford, CA 94305
U.S.A.
--------------------------------------------------------------------------