Involvement of gibberellins in the stem elongation of sun and shade ecotypes of Stellaria longipes that is induced by low light irradiance
ABSTRACT Plants from two ecotypes of Stellaria longipes , alpine (an open, sunny habitat) and prairie (where adjacent plants provide a shaded habitat), were grown under normal and reduced levels of photosynthetically active radiation (PAR). Growth under low PAR is significantly promoted in both ecot...
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crwiley:10.1111/j.1365-3040.2006.01512.x 2024-06-09T07:49:48+00:00 Involvement of gibberellins in the stem elongation of sun and shade ecotypes of Stellaria longipes that is induced by low light irradiance KUREPIN, LEONID V. PHARIS, RICHARD P. REID, DAVID M. CHINNAPPA, C. C. 2006 http://dx.doi.org/10.1111/j.1365-3040.2006.01512.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3040.2006.01512.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3040.2006.01512.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Plant, Cell & Environment volume 29, issue 7, page 1319-1328 ISSN 0140-7791 1365-3040 journal-article 2006 crwiley https://doi.org/10.1111/j.1365-3040.2006.01512.x 2024-05-16T14:25:33Z ABSTRACT Plants from two ecotypes of Stellaria longipes , alpine (an open, sunny habitat) and prairie (where adjacent plants provide a shaded habitat), were grown under normal and reduced levels of photosynthetically active radiation (PAR). Growth under low PAR is significantly promoted in both ecotypes. When quantified by the stable isotope dilution method, endogenous gibberellins (GAs) (GA 1 , GA 8 , GA 20 , GA 19 ) were significantly elevated under low PAR in both ‘sun’ and ‘shade’ ecotypes, as was GA 53 in the shade ecotype. Changes in endogenous GA 1 levels were significantly correlated with stem growth during a 28 d growth cycle and with relative growth rate (RGR) for height under low PAR for both ecotypes. Interestingly, under low irradiance PAR, changes (both increases and decreases) in GA 8 , the 2 β ‐hydroxylated ‘inactive’ catabolite of GA 1 , closely parallel bidaily stem growth changes for both ecotypes. Because the significantly greater stem elongation of both ecotypes in response to low irradiance PAR is associated with significant increases in the endogenous levels of five GAs (GA 53 , GA 19 , GA 1 , GA 8 ) in the early 13‐hydroxylation GA biosynthesis pathway (measured at days 7, 14 and 21), we conclude that the low irradiance PAR has very likely induced an overall increase in GA biosynthesis. Article in Journal/Newspaper Stellaria longipes Wiley Online Library Plant, Cell and Environment 29 7 1319 1328 |
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Wiley Online Library |
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English |
description |
ABSTRACT Plants from two ecotypes of Stellaria longipes , alpine (an open, sunny habitat) and prairie (where adjacent plants provide a shaded habitat), were grown under normal and reduced levels of photosynthetically active radiation (PAR). Growth under low PAR is significantly promoted in both ecotypes. When quantified by the stable isotope dilution method, endogenous gibberellins (GAs) (GA 1 , GA 8 , GA 20 , GA 19 ) were significantly elevated under low PAR in both ‘sun’ and ‘shade’ ecotypes, as was GA 53 in the shade ecotype. Changes in endogenous GA 1 levels were significantly correlated with stem growth during a 28 d growth cycle and with relative growth rate (RGR) for height under low PAR for both ecotypes. Interestingly, under low irradiance PAR, changes (both increases and decreases) in GA 8 , the 2 β ‐hydroxylated ‘inactive’ catabolite of GA 1 , closely parallel bidaily stem growth changes for both ecotypes. Because the significantly greater stem elongation of both ecotypes in response to low irradiance PAR is associated with significant increases in the endogenous levels of five GAs (GA 53 , GA 19 , GA 1 , GA 8 ) in the early 13‐hydroxylation GA biosynthesis pathway (measured at days 7, 14 and 21), we conclude that the low irradiance PAR has very likely induced an overall increase in GA biosynthesis. |
format |
Article in Journal/Newspaper |
author |
KUREPIN, LEONID V. PHARIS, RICHARD P. REID, DAVID M. CHINNAPPA, C. C. |
spellingShingle |
KUREPIN, LEONID V. PHARIS, RICHARD P. REID, DAVID M. CHINNAPPA, C. C. Involvement of gibberellins in the stem elongation of sun and shade ecotypes of Stellaria longipes that is induced by low light irradiance |
author_facet |
KUREPIN, LEONID V. PHARIS, RICHARD P. REID, DAVID M. CHINNAPPA, C. C. |
author_sort |
KUREPIN, LEONID V. |
title |
Involvement of gibberellins in the stem elongation of sun and shade ecotypes of Stellaria longipes that is induced by low light irradiance |
title_short |
Involvement of gibberellins in the stem elongation of sun and shade ecotypes of Stellaria longipes that is induced by low light irradiance |
title_full |
Involvement of gibberellins in the stem elongation of sun and shade ecotypes of Stellaria longipes that is induced by low light irradiance |
title_fullStr |
Involvement of gibberellins in the stem elongation of sun and shade ecotypes of Stellaria longipes that is induced by low light irradiance |
title_full_unstemmed |
Involvement of gibberellins in the stem elongation of sun and shade ecotypes of Stellaria longipes that is induced by low light irradiance |
title_sort |
involvement of gibberellins in the stem elongation of sun and shade ecotypes of stellaria longipes that is induced by low light irradiance |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1365-3040.2006.01512.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3040.2006.01512.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3040.2006.01512.x |
genre |
Stellaria longipes |
genre_facet |
Stellaria longipes |
op_source |
Plant, Cell & Environment volume 29, issue 7, page 1319-1328 ISSN 0140-7791 1365-3040 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-3040.2006.01512.x |
container_title |
Plant, Cell and Environment |
container_volume |
29 |
container_issue |
7 |
container_start_page |
1319 |
op_container_end_page |
1328 |
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1801382621099327488 |