Stable Isotope Geochemistry


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Stable Isotope Geochemistry <[log in to unmask]>
Mon, 20 Feb 2006 09:27:50 +1030
text/plain (190 lines)
This website might be useful to people looking for identification of C3
versus C4 grasses:
The photosynthetic pathway is listed under the subheading "Transverse
section of leaf blade, physiology" for most species.


-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On
Behalf Of sheshshayee Sheshshayee
Sent: Sunday, 19 February 2006 5:13 PM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] C3 or C4

I agree with Darren,  There is no web page which can readily tell us
about the photosynthetic pathway of a given species.  Such an
information would be extremely useful in several ways.

In situations of confusion (alhough Mat Wooller has categorised some
species as C3 grasses), one can get the leaf samples analysed for carbon
isotope ratios.


Dr. M.S. Sheshshayee
Assistant Professor
Department of Crop Physiology
University of Agricultural Sciences
GKVK Campus,  Bangalore 560 065

Ph(W): +91-80-2362 0737
Ph(H): +91-80-2363 6414

>From: Darren Grocke <[log in to unmask]>
>Reply-To: Stable Isotope Geochemistry <[log in to unmask]>
>To: [log in to unmask]
>Subject: Re: [ISOGEOCHEM] C3 or C4
>Date: Fri, 17 Feb 2006 18:10:33 -0500
>Dear Juzhi and Mat
>Yes, that is correct from my searches, but is there a compendium  which

>separates C3 and C4 plants. As we know a lot of this  distinction is 
>based on morphology and yet several years ago it was  published that 
>Kranz anatomy was not a requirement, and thus not 100%  certain for 
>distinguishing these two plant groups.
>I too have been searching for a database that distinguishes C3 and  C4,

>both through morphology and carbon-isotope ratios. Maybe we need  to 
>make one!!!!
>On 17-Feb-06, at 5:23 PM, Matthew Wooller wrote:
>>Dear Juzhi,
>>If the identifications of the grasses in your list are correct then  
>>they are all from C3 Genera
>>are all C3.
>>Cheers for now,
>>Mat Wooller
>>On Feb 17, 2006, at 12:40 PM, Juzhi Hou wrote:
>>>Hi Dear Dr. Wooller,
>>>The samples include
>>>Typha Latifolia
>>>Impatiens capensis
>>>Smilax herbacea L.
>>>Aster Divaricatus
>>>carya pennsylvania
>>>Trifolium pratense L
>>>Mimulus ringens
>>>Juncus tenuis
>>>Agropyron sp.
>>>Dactylis glomerata
>>>Phleum pratense
>>>Daucus carota
>>>Alopecurus L.
>>>Some of the names may not be accurate.
>>>Thank you very much
>>>----- Original Message -----
>>>From: Matthew Wooller
>>>To: [log in to unmask]
>>>Sent: Friday, February 17, 2006 4:28 PM
>>>Subject: Re: [ISOGEOCHEM] C3 or C4
>>>What are their scientific names?
>>>Mat Wooller
>>>Matthew Wooller
>>>Assistant Professor,
>>>Alaska Stable Isotope Facility,
>>>Water and Environmental Research Center/Institute of Marine Sciences,

>>>Room 461 Duckering Building, University of Alaska Fairbanks, 
>>>Fairbanks, Alaska, 99775
>>>Phone: 907 474 6738
>>>Wooller Lab:
>>>Wooller profile:
>>>Alaska Quaternary Center:
>>>Mangrove project
>>>On Feb 17, 2006, at 12:29 PM, Juzhi Hou wrote:
>>>Hi Dear list members,
>>>I have some grass samples in hand. I know their scientific name,  and

>>>common name. Is there an easy way to find whether they are C3  or C4 
>>>plants? For example, a searchable list/website is perfect;  some
>>>ways also help.
>>>Thanks for any informaiton!
>>>Juzhi Hou
>>>Juzhi Hou
>>>Department of Geological Sciences
>>>Brown University
>>>Box 1846
>>>324 Brook Street
>>>Providence, RI 02912
>>>[log in to unmask]
>Dr Darren Grocke
>Assistant Professor in Biogeochemistry
>Stable-Isotope Biogeochemistry Laboratory (SIBL)
>School of Geography & Earth Sciences
>McMaster University
>1280 Main Street West
>ON L8S 4K1
>Office phone:    +1 905 525 9140 (ext. 26334)
>Lab phone:        +1 905 525 9140 (ext. 27535)
>Fax number:        +1 905 546 0463