Thanks Pankaj I had read it ( a few repeatedly) in some reviews or papers about the molecular exams from old specimen
I have also seen ( i was present when at ..... herbarium) some visiting scientists were snipping small/minute leaf pieces from herbarium dried leaf etc for exams ) could not have been for enzyme essays! usha di ps silica gel is how i dry my flowers for flower arranging for fall and winter. would drying in microwave oven preserve the dna/r na structure?/ i have not thought about it.. is there any data out there? On Wed, Nov 4, 2015 at 4:06 AM, Pankaj Kumar <[email protected]> wrote: > Plant specimens were not taken for dna analysis earlier. But now a days > they are. > The main thing about DNA analysis is, it is best done from fresh samples > or a sample which were dried without rotting (very fast drying). Hence we > use silica gel for fast drying. As the samples on herbarium sheet or even > in the silica gets older the chances of DNA extraction becomes less as the > dna starts degenrating. > Poison can be anything from mercury chloride or even alcohol. Infact at > our organisation we dont use any chemicals to kill.but still we are not > able to extract DNA !! > > On Tue, Nov 3, 2015 at 10:39 PM, Ushadi Micromini < > [email protected]> wrote: > >> Tapasda >> >> poisoned by what ? >> >> mercury or something else? >> >> i thought some pieces of leaves are routinely taken for biochemical and >> molecular analysis from herbarium specimen >> >> am i wrong? >> >> usha di >> >> >> >> >> On Mon, Nov 2, 2015 at 10:42 PM, Tapas Chakrabarty <[email protected]> >> wrote: >> >>> Ushadi, >>> For molecular studies the herbarium specimens are not eligible as these >>> are poisoned. Sometimes back someone requested me to send fresh leaf >>> samples of Nicobariodendron sleumeri, tentatively placed under >>> Celastraceae, for molecular studies to solve the problem whether it really >>> belongs to the Celastraceae or a new family should be proposed. Thus if >>> Nicolas ji can find out some way of preserving his materials without >>> poisoning, it is quite good but at the same time he should adhere to the >>> valuable suggestions given by Pankaj ji. >>> Regards, >>> Tapas. >>> >>> >>> On Mon, Nov 2, 2015 at 2:43 PM, Dr Pankaj Kumar <[email protected]> >>> wrote: >>> >>>> Dear Sir >>>> I am really fascinated to see these and other images on yoru website. >>>> Ideally an image to be called a herbarium specimen, it needs to be in >>>> the size of A3. >>>> I noticed that none of your specimens have a number (voucher number). >>>> Secondly, I would suggest you to try a black background. Just spread >>>> your specimens on the scanner and scan removing the upper cover. The image >>>> will have a black background but smaller flowers really look very nice. You >>>> can still put the lid back and scan with white background. >>>> Please also remember, if someday you need to describe a new species, >>>> then you need a proper specimen and not the digital one. So also remember >>>> to keep the sheet with dry plant always in your collection for reference. >>>> Most of the real herbaria have old specimens that dates back to 300 >>>> years sometimes. They have their own importance and your work has its own, >>>> so just keep going. >>>> Best of luck. >>>> If you need any help from me, please feel free to write to me here or >>>> privately. >>>> Thanks and regards >>>> Pankaj >>>> >>>> >>>> >>>> On Thursday, 29 October 2015 18:05:01 UTC+8, Nicolas Lagarrigue wrote: >>>>> >>>>> Dear members of eflora of India group, >>>>> >>>>> >>>>> We would like to share with you our new virtual herbarium, an online >>>>> catalogue of plants from our region, including local, vulnerable and >>>>> sometimes endangered species from the native evergreen forests of the >>>>> Coromandel Coast of Tamil Nadu, as well as other widespread species of the >>>>> Indian subcontinent. >>>>> >>>>> >>>>> Unlike many other virtual herbaria, which use pictures of their >>>>> existing collections, samples of which can be decades old, often >>>>> discoloured and degraded, Pitchandikulam Forest Virtual Herbarium uses >>>>> fresh specimens, briefly flattened and then scanned immediately in high >>>>> definition, in order to conserve their natural colours and texture. This >>>>> creates exquisite, vivid images which allow us to fully appreciate the >>>>> intricate beauty of plants and to discover them more intimately. >>>>> >>>>> >>>>> For each species, detailed botanical information is provided, >>>>> including nomenclature, description, phenology, reproduction and >>>>> dispersal, >>>>> as well details of plant ecology, distribution, conservation status and >>>>> propagation and planting advice. >>>>> >>>>> In addition to the detailed scientific data, it offers additional >>>>> ethnobotanical information (human uses of plants for food, crafts, >>>>> medicines or rituals…). >>>>> >>>>> >>>>> Pitchandikulam Forest Virtual Herbarium is a work in progress. So far >>>>> 50 plant species are available to view and learn about, with new species >>>>> added continuously. >>>>> >>>>> If you are interested, we encourage you to join our mailing list to >>>>> get the latest updates. >>>>> >>>>> >>>>> Pitchandikulam Forest Virtual Herbarium can be found here: >>>>> >>>>> www.pitchandikulam-herbarium.org >>>>> >>>>> >>>>> Enjoy your visit and share it with all the plant lovers you know… >>>>> >>>>> Thank you. >>>>> >>>>> Irène and Nico >>>>> >>>>> >>>>> <http://www.pitchandikulam-herbarium.org/img/mail_signature.jpg> >>>>> >>>>> >>>>> >>>>> <http://www.pitchandikulam-herbarium.org/img/pitchandikulam_herbarium.jpg> >>>>> >>>>> >>>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "efloraofindia" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To post to this group, send email to [email protected]. >>>> Visit this group at http://groups.google.com/group/indiantreepix. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "efloraofindia" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at http://groups.google.com/group/indiantreepix. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Usha di >> =========== >> > > > > -- > ****************************************************** > **************************************************************** > *Pankaj Kumar*, Ph.D. > *IUCN-SSC Orchid Specialist Group Asia* > > *Office*: > > Conservation Officer > > Orchid Conservation Section > > Flora Conservation Department > > Kadoorie Farm and Botanic Garden (KFBG) Corporation > Lam Kam Road, Tai Po, New Territories, Hong Kong. > > *Residence*: > House no. 39, 2nd Floor, Shui Wo Tsuen > Lam Tsuen, Tai Po, New Territories, Hong Kong. > *email*: [email protected]; [email protected] > *Phone*: +852 2483 7128 (office - 8:30am to 5:00pm); +852 9436 6251 > (mobile); *Fax*: +852 2483 7194 > > -- Usha di =========== -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. Visit this group at http://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.
