Adaptation of photosynthesis to water deficit in the reproductive phaseof a maize (Zea mays L.) inbred line
Photosynthesis is sensitive to water deficit (WD) stress. Maize (Zea mays L.) yield is vulnerable to water stress, especially if it occurs during the reproductive stage. In this study, the expression patterns of photosynthesis-related genes, together with photosynthetic gas-exchange and fluorescence...
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| Format: | Article |
| Language: | English |
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Academy of Sciences of the Czech Republic, Institute of Experimental Botany
2019-05-01
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| Series: | Photosynthetica |
| Subjects: | |
| Online Access: | https://ps.ueb.cas.cz/artkey/phs-201902-0005_adaptation-of-photosynthesis-to-water-deficit-in-the-reproductive-phaseof-a-maize-zea-mays-l-inbred-line.php |
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| author | H.F. ZHENG L.F. XIN J.M. GUO J. MAO X.P. HAN L. JIA B.Y. ZHENG C.G. DU R.W. ELMORE Q.H. YANG R.X. SHAO |
| author_facet | H.F. ZHENG L.F. XIN J.M. GUO J. MAO X.P. HAN L. JIA B.Y. ZHENG C.G. DU R.W. ELMORE Q.H. YANG R.X. SHAO |
| author_sort | H.F. ZHENG |
| collection | DOAJ |
| description | Photosynthesis is sensitive to water deficit (WD) stress. Maize (Zea mays L.) yield is vulnerable to water stress, especially if it occurs during the reproductive stage. In this study, the expression patterns of photosynthesis-related genes, together with photosynthetic gas-exchange and fluorescence parameters were investigated in a maize inbred line exposed to 50% of field water capacity (moderate WD) for 15 d after tassel emergence. The results demonstrated that WD down-regulated expression of psbA, psbB, psbC, psbP, psaA, psaB, and cab, especially at later periods of WD stress. Besides, with the increased WD stress, the steady decline in the value of photosynthesis performance index, maximum quantum yield of primary photochemistry, quantum yield for electron transport, quantum yield for the reduction of end acceptors of PSI per photon absorbed, and the efficiency of an electron beyond QA- that reduced PSI acceptors, and a clear increase in the J-step and I-step, K-band as well as L-band were observed. The results suggested that WD might restrict light-harvesting and electron transport. Interestingly, leaf transcript levels of rbcL and rbcS were up-regulated at the later stage of water stress in maize inbred line, which helped repair injury to PSII centers and maintain PSII activity (increased quantum yield of dissipation and effective antenna size of an active reaction center) under 15-d lasting WD. |
| first_indexed | 2024-12-12T23:36:24Z |
| format | Article |
| id | doaj.art-9c98c8bb279849e8b0179e8709a4b77a |
| institution | Directory Open Access Journal |
| issn | 0300-3604 1573-9058 |
| language | English |
| last_indexed | 2024-12-12T23:36:24Z |
| publishDate | 2019-05-01 |
| publisher | Academy of Sciences of the Czech Republic, Institute of Experimental Botany |
| record_format | Article |
| series | Photosynthetica |
| spelling | doaj.art-9c98c8bb279849e8b0179e8709a4b77a2022-12-22T00:07:27ZengAcademy of Sciences of the Czech Republic, Institute of Experimental BotanyPhotosynthetica0300-36041573-90582019-05-0157239940810.32615/ps.2019.047phs-201902-0005Adaptation of photosynthesis to water deficit in the reproductive phaseof a maize (Zea mays L.) inbred lineH.F. ZHENG0L.F. XINJ.M. GUO1J. MAO2X.P. HAN3L. JIA4B.Y. ZHENG5C.G. DUR.W. ELMOREQ.H. YANG6R.X. SHAO7Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln-68583, USA4Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln-68583, USA4Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln-68583, USA4Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln-68583, USA4Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln-68583, USA4Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln-68583, USA4Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln-68583, USA4Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln-68583, USA4Photosynthesis is sensitive to water deficit (WD) stress. Maize (Zea mays L.) yield is vulnerable to water stress, especially if it occurs during the reproductive stage. In this study, the expression patterns of photosynthesis-related genes, together with photosynthetic gas-exchange and fluorescence parameters were investigated in a maize inbred line exposed to 50% of field water capacity (moderate WD) for 15 d after tassel emergence. The results demonstrated that WD down-regulated expression of psbA, psbB, psbC, psbP, psaA, psaB, and cab, especially at later periods of WD stress. Besides, with the increased WD stress, the steady decline in the value of photosynthesis performance index, maximum quantum yield of primary photochemistry, quantum yield for electron transport, quantum yield for the reduction of end acceptors of PSI per photon absorbed, and the efficiency of an electron beyond QA- that reduced PSI acceptors, and a clear increase in the J-step and I-step, K-band as well as L-band were observed. The results suggested that WD might restrict light-harvesting and electron transport. Interestingly, leaf transcript levels of rbcL and rbcS were up-regulated at the later stage of water stress in maize inbred line, which helped repair injury to PSII centers and maintain PSII activity (increased quantum yield of dissipation and effective antenna size of an active reaction center) under 15-d lasting WD.https://ps.ueb.cas.cz/artkey/phs-201902-0005_adaptation-of-photosynthesis-to-water-deficit-in-the-reproductive-phaseof-a-maize-zea-mays-l-inbred-line.phpbiomass; ojip transients; photosynthetic capacity; tassel emergence; withholding water. |
| spellingShingle | H.F. ZHENG L.F. XIN J.M. GUO J. MAO X.P. HAN L. JIA B.Y. ZHENG C.G. DU R.W. ELMORE Q.H. YANG R.X. SHAO Adaptation of photosynthesis to water deficit in the reproductive phaseof a maize (Zea mays L.) inbred line Photosynthetica biomass; ojip transients; photosynthetic capacity; tassel emergence; withholding water. |
| title | Adaptation of photosynthesis to water deficit in the reproductive phaseof a maize (Zea mays L.) inbred line |
| title_full | Adaptation of photosynthesis to water deficit in the reproductive phaseof a maize (Zea mays L.) inbred line |
| title_fullStr | Adaptation of photosynthesis to water deficit in the reproductive phaseof a maize (Zea mays L.) inbred line |
| title_full_unstemmed | Adaptation of photosynthesis to water deficit in the reproductive phaseof a maize (Zea mays L.) inbred line |
| title_short | Adaptation of photosynthesis to water deficit in the reproductive phaseof a maize (Zea mays L.) inbred line |
| title_sort | adaptation of photosynthesis to water deficit in the reproductive phaseof a maize zea mays l inbred line |
| topic | biomass; ojip transients; photosynthetic capacity; tassel emergence; withholding water. |
| url | https://ps.ueb.cas.cz/artkey/phs-201902-0005_adaptation-of-photosynthesis-to-water-deficit-in-the-reproductive-phaseof-a-maize-zea-mays-l-inbred-line.php |
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