Nature des liaisons de l'ion calcium dans la paroi de Nitella flexilis
Spectrophotometric titrations and conductivity measurements show that Nitella cell walls contain nonexchangeable Ca 2+ cations which are probably chelated by COO − anions and donor groups such as OH (from polysaccharides) or NH (from proteins).A large part of these calcium ions are removed by acidif...
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Canadian Science Publishing
1978
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Online Access: | http://dx.doi.org/10.1139/b78-167 http://www.nrcresearchpress.com/doi/pdf/10.1139/b78-167 |
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crcansciencepubl:10.1139/b78-167 2023-12-17T10:45:55+01:00 Nature des liaisons de l'ion calcium dans la paroi de Nitella flexilis Wuytack, R. Gillet, C. 1978 http://dx.doi.org/10.1139/b78-167 http://www.nrcresearchpress.com/doi/pdf/10.1139/b78-167 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 56, issue 12, page 1439-1443 ISSN 0008-4026 Plant Science journal-article 1978 crcansciencepubl https://doi.org/10.1139/b78-167 2023-11-19T13:38:23Z Spectrophotometric titrations and conductivity measurements show that Nitella cell walls contain nonexchangeable Ca 2+ cations which are probably chelated by COO − anions and donor groups such as OH (from polysaccharides) or NH (from proteins).A large part of these calcium ions are removed by acidification of the external medium. Subsequent augmentation of COO − groups increases the number of exchange sites available for H + and K + ions. The variation of the carboxylic groups concentration (α) is thus not fully accounted for by the pK of polygalacturonic acids but is also related to changes within the constitutive calcium of the cell wall. Article in Journal/Newspaper Nitella flexilis Canadian Science Publishing (via Crossref) Canadian Journal of Botany 56 12 1439 1443 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Plant Science |
spellingShingle |
Plant Science Wuytack, R. Gillet, C. Nature des liaisons de l'ion calcium dans la paroi de Nitella flexilis |
topic_facet |
Plant Science |
description |
Spectrophotometric titrations and conductivity measurements show that Nitella cell walls contain nonexchangeable Ca 2+ cations which are probably chelated by COO − anions and donor groups such as OH (from polysaccharides) or NH (from proteins).A large part of these calcium ions are removed by acidification of the external medium. Subsequent augmentation of COO − groups increases the number of exchange sites available for H + and K + ions. The variation of the carboxylic groups concentration (α) is thus not fully accounted for by the pK of polygalacturonic acids but is also related to changes within the constitutive calcium of the cell wall. |
format |
Article in Journal/Newspaper |
author |
Wuytack, R. Gillet, C. |
author_facet |
Wuytack, R. Gillet, C. |
author_sort |
Wuytack, R. |
title |
Nature des liaisons de l'ion calcium dans la paroi de Nitella flexilis |
title_short |
Nature des liaisons de l'ion calcium dans la paroi de Nitella flexilis |
title_full |
Nature des liaisons de l'ion calcium dans la paroi de Nitella flexilis |
title_fullStr |
Nature des liaisons de l'ion calcium dans la paroi de Nitella flexilis |
title_full_unstemmed |
Nature des liaisons de l'ion calcium dans la paroi de Nitella flexilis |
title_sort |
nature des liaisons de l'ion calcium dans la paroi de nitella flexilis |
publisher |
Canadian Science Publishing |
publishDate |
1978 |
url |
http://dx.doi.org/10.1139/b78-167 http://www.nrcresearchpress.com/doi/pdf/10.1139/b78-167 |
genre |
Nitella flexilis |
genre_facet |
Nitella flexilis |
op_source |
Canadian Journal of Botany volume 56, issue 12, page 1439-1443 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b78-167 |
container_title |
Canadian Journal of Botany |
container_volume |
56 |
container_issue |
12 |
container_start_page |
1439 |
op_container_end_page |
1443 |
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1785569235142967296 |