Variation potential influence on photosynthetic cyclic electron flow in pea
Cyclic electron flow is an important component of the total photosynthetic electron flow and participates in adaptation to the action of stressors. Local leaf stimulation induces electrical signals, including variation potential (VP), which inactivate photosynthesis; however, their influence on cycl...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-01-01
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| Series: | Frontiers in Plant Science |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2014.00766/full |
| _version_ | 1830374372243668992 |
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| author | Vladimir eSukhov Lyubov eSurova Oksana eSherstneva Lyubov eKaticheva Vladimir eVodeneev |
| author_facet | Vladimir eSukhov Lyubov eSurova Oksana eSherstneva Lyubov eKaticheva Vladimir eVodeneev |
| author_sort | Vladimir eSukhov |
| collection | DOAJ |
| description | Cyclic electron flow is an important component of the total photosynthetic electron flow and participates in adaptation to the action of stressors. Local leaf stimulation induces electrical signals, including variation potential (VP), which inactivate photosynthesis; however, their influence on cyclic electron flow has not been investigated. The aim of this study was to investigate VP’s influence on cyclic electron flow in pea (Pisum sativum L.). VP was induced in pea seedling leaves by local heating and measured in an adjacent, undamaged leaf by extracellular electrodes. CO2 assimilation was measured using a portable gas exchange measuring system. Photosystem I and II parameters were investigated using a measuring system for simultaneous assessment of P700 oxidation and chlorophyll fluorescence. Heating-induced VP reduced CO2 assimilation and electron flow through photosystem II. In response, cyclic electron flow rapidly decreased and subsequently slowly increased. Slow increases in cyclic flow were caused by decreased electron flow through photosystem II, which was mainly connected with VP-induced photosynthetic dark stage inactivation. However, direct influence by VP on photosystem I also participated in activation of cyclic electron flow. Thus, VP, induced by local leaf-heating, activated cyclic electron flow in undamaged leaves. This response was similar to photosynthetic changes observed under the action of direct stressors. Possible mechanisms of VP’s influence on cyclic flow were discussed. |
| first_indexed | 2024-12-20T07:36:35Z |
| format | Article |
| id | doaj.art-ef3178d59d7040a1a27db6112b409ce0 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-20T07:36:35Z |
| publishDate | 2015-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-ef3178d59d7040a1a27db6112b409ce02022-12-21T19:48:16ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2015-01-01510.3389/fpls.2014.00766112617Variation potential influence on photosynthetic cyclic electron flow in peaVladimir eSukhov0Lyubov eSurova1Oksana eSherstneva2Lyubov eKaticheva3Vladimir eVodeneev4N.I. Lobachevsky State University of Nizhny NovgorodN.I. Lobachevsky State University of Nizhny NovgorodN.I. Lobachevsky State University of Nizhny NovgorodN.I. Lobachevsky State University of Nizhny NovgorodN.I. Lobachevsky State University of Nizhny NovgorodCyclic electron flow is an important component of the total photosynthetic electron flow and participates in adaptation to the action of stressors. Local leaf stimulation induces electrical signals, including variation potential (VP), which inactivate photosynthesis; however, their influence on cyclic electron flow has not been investigated. The aim of this study was to investigate VP’s influence on cyclic electron flow in pea (Pisum sativum L.). VP was induced in pea seedling leaves by local heating and measured in an adjacent, undamaged leaf by extracellular electrodes. CO2 assimilation was measured using a portable gas exchange measuring system. Photosystem I and II parameters were investigated using a measuring system for simultaneous assessment of P700 oxidation and chlorophyll fluorescence. Heating-induced VP reduced CO2 assimilation and electron flow through photosystem II. In response, cyclic electron flow rapidly decreased and subsequently slowly increased. Slow increases in cyclic flow were caused by decreased electron flow through photosystem II, which was mainly connected with VP-induced photosynthetic dark stage inactivation. However, direct influence by VP on photosystem I also participated in activation of cyclic electron flow. Thus, VP, induced by local leaf-heating, activated cyclic electron flow in undamaged leaves. This response was similar to photosynthetic changes observed under the action of direct stressors. Possible mechanisms of VP’s influence on cyclic flow were discussed.http://journal.frontiersin.org/Journal/10.3389/fpls.2014.00766/fullphotosystem Iphotosystem IIPisum sativumvariation potentialcyclic electron flownoncyclic electron flow |
| spellingShingle | Vladimir eSukhov Lyubov eSurova Oksana eSherstneva Lyubov eKaticheva Vladimir eVodeneev Variation potential influence on photosynthetic cyclic electron flow in pea Frontiers in Plant Science photosystem I photosystem II Pisum sativum variation potential cyclic electron flow noncyclic electron flow |
| title | Variation potential influence on photosynthetic cyclic electron flow in pea |
| title_full | Variation potential influence on photosynthetic cyclic electron flow in pea |
| title_fullStr | Variation potential influence on photosynthetic cyclic electron flow in pea |
| title_full_unstemmed | Variation potential influence on photosynthetic cyclic electron flow in pea |
| title_short | Variation potential influence on photosynthetic cyclic electron flow in pea |
| title_sort | variation potential influence on photosynthetic cyclic electron flow in pea |
| topic | photosystem I photosystem II Pisum sativum variation potential cyclic electron flow noncyclic electron flow |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2014.00766/full |
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