Question GRO term

[katica at acoma.Stanford.EDU]

Satoh,

Sorry I wasn't specific enough regardng embryogenic callus, 
'embryogenic callus' should describe callus with demonstrable competence 
to form somatic embryos. 'organogenic callus' has competence to form roots 
and/or shoots.

I vaguely remember that some people referred to embryogenic callus even 
though regeneration of shoots/roots took place from such callus. My 
recollection goes back to literature that was published some 12 or more 
years ago.

Is there a clear distinction in plant tissue culture community regarding 
proper use of this terminology, 'embryogenic callus' and 'organogenic 
callus'?

Katica


On Wed, 14 Jun 2006 katica at acoma.stanford.edu wrote:

> 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.
--------------------------------------------------------------------------