The accumulation of proline in Prasiola crispa during winter in Antarctica
Samples of Prasiola crispa were collected in Antarctica throughout a 13‐month period and analysed for free amino acids by HPLC. There was a marked increase in the levels of proline with the onset of winter, concurrent with a decrease in the other predominant amino acids. In January, proline constitu...
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crwiley:10.1111/j.1399-3054.1995.tb00779.x 2024-06-23T07:46:21+00:00 The accumulation of proline in Prasiola crispa during winter in Antarctica Jackson, A. E. Seppelt, R. D. 1995 http://dx.doi.org/10.1111/j.1399-3054.1995.tb00779.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1399-3054.1995.tb00779.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1399-3054.1995.tb00779.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Physiologia Plantarum volume 94, issue 1, page 25-30 ISSN 0031-9317 1399-3054 journal-article 1995 crwiley https://doi.org/10.1111/j.1399-3054.1995.tb00779.x 2024-06-13T04:21:59Z Samples of Prasiola crispa were collected in Antarctica throughout a 13‐month period and analysed for free amino acids by HPLC. There was a marked increase in the levels of proline with the onset of winter, concurrent with a decrease in the other predominant amino acids. In January, proline constituted 1.2 ± 0.1 μ mol (g dry weight) −1 . whereas by mid‐April it was the major component at 28.4 ± 2.9 μ mol (g dry weight) −1 . When winter samples were thawed in a growth cabinet, their proline content declined to 4.3 ± 0.5 μ mol (g dry weight) −1 after 7 days. Measurements of photosynthetic quantum yield indicated that winter samples of P. crispa also recovered photosynthetic activity upon thawing. Amino acids and other solutes are involved in the preservation of photosynthetic activities during freezing and it seems probable that proline is involved in cryoprotection in this species. In summer samples, there was no evidence that proline levels in P. crispa increased with the conductivity of the water in which they were found growing. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Physiologia Plantarum 94 1 25 30 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Samples of Prasiola crispa were collected in Antarctica throughout a 13‐month period and analysed for free amino acids by HPLC. There was a marked increase in the levels of proline with the onset of winter, concurrent with a decrease in the other predominant amino acids. In January, proline constituted 1.2 ± 0.1 μ mol (g dry weight) −1 . whereas by mid‐April it was the major component at 28.4 ± 2.9 μ mol (g dry weight) −1 . When winter samples were thawed in a growth cabinet, their proline content declined to 4.3 ± 0.5 μ mol (g dry weight) −1 after 7 days. Measurements of photosynthetic quantum yield indicated that winter samples of P. crispa also recovered photosynthetic activity upon thawing. Amino acids and other solutes are involved in the preservation of photosynthetic activities during freezing and it seems probable that proline is involved in cryoprotection in this species. In summer samples, there was no evidence that proline levels in P. crispa increased with the conductivity of the water in which they were found growing. |
format |
Article in Journal/Newspaper |
author |
Jackson, A. E. Seppelt, R. D. |
spellingShingle |
Jackson, A. E. Seppelt, R. D. The accumulation of proline in Prasiola crispa during winter in Antarctica |
author_facet |
Jackson, A. E. Seppelt, R. D. |
author_sort |
Jackson, A. E. |
title |
The accumulation of proline in Prasiola crispa during winter in Antarctica |
title_short |
The accumulation of proline in Prasiola crispa during winter in Antarctica |
title_full |
The accumulation of proline in Prasiola crispa during winter in Antarctica |
title_fullStr |
The accumulation of proline in Prasiola crispa during winter in Antarctica |
title_full_unstemmed |
The accumulation of proline in Prasiola crispa during winter in Antarctica |
title_sort |
accumulation of proline in prasiola crispa during winter in antarctica |
publisher |
Wiley |
publishDate |
1995 |
url |
http://dx.doi.org/10.1111/j.1399-3054.1995.tb00779.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1399-3054.1995.tb00779.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1399-3054.1995.tb00779.x |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Physiologia Plantarum volume 94, issue 1, page 25-30 ISSN 0031-9317 1399-3054 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1399-3054.1995.tb00779.x |
container_title |
Physiologia Plantarum |
container_volume |
94 |
container_issue |
1 |
container_start_page |
25 |
op_container_end_page |
30 |
_version_ |
1802645412244357120 |