Simple view
Full metadata view
Authors
Statistics
Enhanced chloroplastic generation of H_{2}O_{2} in stress-resistant Thellungiella salsuginea in comparison to Arabidopsis thaliana
In order to find some basis of salinity resistance in the chloroplastic metabolism, a halophytic Thellungiella salsuginea was compared with glycophytic Arabidopsis thaliana. In control T.s. plants the increased ratios of chlorophyll a/b and of fluorescence emission at 77 K (F_{730}/F_{685}) were documented, in comparison to A.t.. This was accompanied by a higher YII and lower NPQ (non-photochemical quenching) values, and by a more active PSI (photosystem I). Another prominent feature of the photosynthetic electron transport (PET) in T.s. was the intensive production of H_2O_2 from PQ (plastoquinone) pool. Salinity treatment (0.15 and 0.30 M NaCl for A.t. and T.s., respectively) led to a decrease in ratios of chl a/b and F_{730}/F_{685}. In A.t., a salinity-driven enhancement of YII and NPQ was found, in association with the stimulation of H_2O_2 production from PQ pool. In contrast, in salinity-treated T.s., these variables were similar as in controls. The intensive H_2O_2 generation was accompanied by a high activity of PTOX (plastid terminal oxidase), whilst inhibition of this enzyme led to an increased H_2O_2 formation. It is hypothesized, that the intensive H_2O_2 generation from PQ pool might be an important element of stress preparedness in Thellungiella plants. In control T.s. plants, a higher activation state of carboxylase ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco, EC 4.1.1.39) was also documented in concert with the attachment of Rubisco activase (RCA) to the thylakoid membranes. It is supposed, that a closer contact of RCA with PSI in T.s. enables a more efficient Rubisco activation than in A.t.
cris.lastimport.scopus | 2024-04-07T17:52:59Z | |
dc.abstract.en | In order to find some basis of salinity resistance in the chloroplastic metabolism, a halophytic Thellungiella salsuginea was compared with glycophytic Arabidopsis thaliana. In control T.s. plants the increased ratios of chlorophyll a/b and of fluorescence emission at 77 K (F_{730}/F_{685}) were documented, in comparison to A.t.. This was accompanied by a higher YII and lower NPQ (non-photochemical quenching) values, and by a more active PSI (photosystem I). Another prominent feature of the photosynthetic electron transport (PET) in T.s. was the intensive production of H_2O_2 from PQ (plastoquinone) pool. Salinity treatment (0.15 and 0.30 M NaCl for A.t. and T.s., respectively) led to a decrease in ratios of chl a/b and F_{730}/F_{685}. In A.t., a salinity-driven enhancement of YII and NPQ was found, in association with the stimulation of H_2O_2 production from PQ pool. In contrast, in salinity-treated T.s., these variables were similar as in controls. The intensive H_2O_2 generation was accompanied by a high activity of PTOX (plastid terminal oxidase), whilst inhibition of this enzyme led to an increased H_2O_2 formation. It is hypothesized, that the intensive H_2O_2 generation from PQ pool might be an important element of stress preparedness in Thellungiella plants. In control T.s. plants, a higher activation state of carboxylase ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco, EC 4.1.1.39) was also documented in concert with the attachment of Rubisco activase (RCA) to the thylakoid membranes. It is supposed, that a closer contact of RCA with PSI in T.s. enables a more efficient Rubisco activation than in A.t. | pl |
dc.affiliation | Wydział Biochemii, Biofizyki i Biotechnologii : Zakład Fizjologii i Biochemii Roślin | pl |
dc.contributor.author | Wiciarz, Monika - 115331 | pl |
dc.contributor.author | Gubernator, Beata | pl |
dc.contributor.author | Kruk, Jerzy - 129514 | pl |
dc.contributor.author | Niewiadomska, Ewa | pl |
dc.date.accessioned | 2015-05-25T09:10:03Z | |
dc.date.available | 2015-05-25T09:10:03Z | |
dc.date.issued | 2015 | pl |
dc.date.openaccess | 0 | |
dc.description.accesstime | w momencie opublikowania | |
dc.description.number | 3 | pl |
dc.description.physical | 467-476 | pl |
dc.description.version | ostateczna wersja wydawcy | |
dc.description.volume | 153 | pl |
dc.identifier.doi | 10.1111/ppl.12248 | pl |
dc.identifier.eissn | 1399-3054 | pl |
dc.identifier.issn | 0031-9317 | pl |
dc.identifier.project | ROD UJ / P | pl |
dc.identifier.uri | http://ruj.uj.edu.pl/xmlui/handle/item/7902 | |
dc.language | eng | pl |
dc.language.container | eng | pl |
dc.rights | Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne 4.0 Międzynarodowa | * |
dc.rights.licence | CC-BY-NC | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/legalcode.pl | * |
dc.share.type | inne | |
dc.subtype | Article | pl |
dc.title | Enhanced chloroplastic generation of H_{2}O_{2} in stress-resistant Thellungiella salsuginea in comparison to Arabidopsis thaliana | pl |
dc.title.journal | Physiologia Plantarum | pl |
dc.type | JournalArticle | pl |
dspace.entity.type | Publication |
* The migration of download and view statistics prior to the date of April 8, 2024 is in progress.
Views
0
Views per month
Open Access