Question on part of seedling

[Pankaj Jaiswal]

Dear Marty,

Thank you for looking into the maize perspective. By going through the 
references, it seems to be a pretty generic term atleast for the cereals. I will 
work with Felipe on introducing the possible ontology structures.

Pankaj

Marty Sachs wrote:

> OK, I guess the term is used in maize in same sense also:
> 
> http://www.ipm.iastate.edu/ipm/icm/1996/7-1-1996/corncrownrot.html
> 
> The general defination is: Several nodes whose internodes do not elongate
> 
> The crown is comprised of connective tissue which joins the root and 
> shoot. It develops at the base of the coleoptile during seedling 
> development. The crown produces buds that are the source of shoots 
> (tillers), adventitious roots, rhizomes, and stolons. Crowns also serve 
> as storage organs for carbohydrate reserves to support the growth of new 
> plant organs.
> 
> http://forages.orst.edu/projects/regrowth/print-section.cfm?title=Developmental%20Phases
> 
>         -Marty
> 
> At 5:43 PM -0500 10/14/03, Marty Sachs wrote:
> 
>> I've never seen 'crown' used in maize as you're describing its use in 
>> barley.
> 
>>
>> In maize, 'crown' has a very different meaning.  It most frequently 
>> refers to the top of the kernel.
> 
>>
>> E.g.,
> 
>>
>> From: http://www.hort.purdue.edu/newcrop/Crops/Corn.html
> 
>>
>> Dent corn, when fully ripe, has a pronounced depression or dent at the 
>> crown of the kernels. The kernels contain a hard form of starch at the 
>> sides and a soft type in the center. This latter starch shrinks as the 
>> kernel ripens resulting in the terminal depression. Dent varieties 
>> vary in kernel shape from long and narrow to wide and shallow. It is 
>> the type mainly grown in this country.
> 
>>
>> From: http://www.pcs-chromex.com/popcorn/aboutus.html
> 
>>
>> Pearls and Rice - 'Rice' are long kernels with a pointed crown and 
>> 'Pearls' have round crowns and are short and thick.
> 
>>
>>         -Marty Sachs
> 
>>
>> At 5:39 PM -0400 10/14/03, Pankaj Jaiswal wrote:
>>
>>> Hi Everyone,
>>>
>>> Thank you for your responses. Here are some of the definitions I 
>>> found in the literature.
>>>
>>>
>>> CROWN -
>>>
>>> 1
>>> part of the wheat/barley plant located about 0.5 inches below the 
>>> soil surface. The crown is where the nodes are tightly packed 
>>> together, tiller buds develop, and coronal root buds develop.
>>>
>>> 2
>>> Located between the coleoptile and the mesocotyl, the crown contains 
>>> the growing point where the rest of the plant will begin to form and 
>>> the nodes where the nodal or permanent roots will form.
>>>
>>> I think we might have to create new term "germinating/juvenile 
>>> seedling" as an instance of "vegetative shoot", in order to introduce 
>>> "crown" as part of it.
>>>
>>> Any suggestions ?
>>>
>>> Pankaj
>>>
>>>
>>> Leonore Reiser wrote:
>>>
>>>> Hmm_ I did find:
>>>
>>>> on this page:http://www.hcs.ohio-state.edu/hcs200/Stems.html
>>>>
>>>>
>>>> Tillers  are secondary stems that arise from nodes       at the base of
>>>> the main stem, and are almost vertical in position.        The 
>>>> crown of a
>>>> plant is a group of modified stems with       very short internodes that
>>>> occur very close to the soil surface.       It usually functions as 
>>>> a site
>>>> for food storage and new growth       in perennial species. Most forage
>>>> grasses, and some forage legumes       (alfalfa and clovers)Â  have a
>>>> crown.Â
>>>>
>>>> But doesnt quite sound like what is described in the url you sent.
>>>>
>>>> Actually there are some interesting pages on this website (e.g. soybean
>>>> growth stage information).
>>>> Leonore
>>>>
>>>>
>>>> On Tue, 14 Oct 2003, Pankaj Jaiswal wrote:
>>>>
>>>>> Hi
>>>>>
>>>>> Can somebody help me in identifying what is this term "crown" 
>>>>> stands for in
>>>>
>>>>> barley, described at http://bioinf.scri.sari.ac.uk/affy/mx-crown.htm
>>>>>
>>>>> Thanks
>>>>>
>>>>> Pankaj