Photosynthetic Units and Carbon Assimilation in Leaves of Grain Sorghum under Different Light Intensities
The Cyt f and P700 contents in leaves of three Sorghum, varieties were measured, in relation to their carbon assimilation, under different light intensities during growth. At the maximum irradiation used (1,800 μE m−2 s−1) the ratio of P700 to Cyt f was close to unity, whereas under low irradiation...
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| Veröffentlicht in: | Plant and cell physiology 1983-01, Vol.24 (8), p.1395-1400 |
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| container_title | Plant and cell physiology |
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| creator | Chenga Reddy, V. Raghavendra, A. S. Das, V. S. R. |
| description | The Cyt f and P700 contents in leaves of three Sorghum, varieties were measured, in relation to their carbon assimilation, under different light intensities during growth. At the maximum irradiation used (1,800 μE m−2 s−1) the ratio of P700 to Cyt f was close to unity, whereas under low irradiation (450 μE m−2 s−1) the ratio of P700 to Cyt f ranged from two to three. A strikingly positive correlation existed between the P700 contents of the leaves and their rates of carbon dioxide fixation, dry matter production and Cyt f contents, only when the plants were grown under high light intensities. The P700 content of the leaves in plants grown under low irradiation was unrelated to the contents of Cyt f. Thus, at a high light intensity there is a close relationship between the Cyt f and P700 levels, but at low intensities the amounts of electron carriers and the reaction centre are independent. |
| doi_str_mv | 10.1093/oxfordjournals.pcp.a076660 |
| format | Article |
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S. ; Das, V. S. R.</creator><creatorcontrib>Chenga Reddy, V. ; Raghavendra, A. S. ; Das, V. S. R.</creatorcontrib><description>The Cyt f and P700 contents in leaves of three Sorghum, varieties were measured, in relation to their carbon assimilation, under different light intensities during growth. At the maximum irradiation used (1,800 μE m−2 s−1) the ratio of P700 to Cyt f was close to unity, whereas under low irradiation (450 μE m−2 s−1) the ratio of P700 to Cyt f ranged from two to three. A strikingly positive correlation existed between the P700 contents of the leaves and their rates of carbon dioxide fixation, dry matter production and Cyt f contents, only when the plants were grown under high light intensities. The P700 content of the leaves in plants grown under low irradiation was unrelated to the contents of Cyt f. Thus, at a high light intensity there is a close relationship between the Cyt f and P700 levels, but at low intensities the amounts of electron carriers and the reaction centre are independent.</description><identifier>ISSN: 0032-0781</identifier><identifier>EISSN: 1471-9053</identifier><identifier>DOI: 10.1093/oxfordjournals.pcp.a076660</identifier><identifier>CODEN: PCPHA5</identifier><language>eng</language><publisher>Oxford: Oxford University Press</publisher><subject>Agronomy. Soil science and plant productions ; Biological and medical sciences ; Cytochrome f ; Economic plant physiology ; Fundamental and applied biological sciences. Psychology ; leaves ; light intensity ; Metabolism ; Net assimilation, photosynthesis, carbon metabolism. Photorespiration, respiration, fermentation (anoxia, hypoxia) ; Nutrition. Photosynthesis. Respiration. Metabolism ; P700 ; Photosynthesis, respiration. 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R.</creatorcontrib><title>Photosynthetic Units and Carbon Assimilation in Leaves of Grain Sorghum under Different Light Intensities</title><title>Plant and cell physiology</title><description>The Cyt f and P700 contents in leaves of three Sorghum, varieties were measured, in relation to their carbon assimilation, under different light intensities during growth. At the maximum irradiation used (1,800 μE m−2 s−1) the ratio of P700 to Cyt f was close to unity, whereas under low irradiation (450 μE m−2 s−1) the ratio of P700 to Cyt f ranged from two to three. A strikingly positive correlation existed between the P700 contents of the leaves and their rates of carbon dioxide fixation, dry matter production and Cyt f contents, only when the plants were grown under high light intensities. The P700 content of the leaves in plants grown under low irradiation was unrelated to the contents of Cyt f. Thus, at a high light intensity there is a close relationship between the Cyt f and P700 levels, but at low intensities the amounts of electron carriers and the reaction centre are independent.</description><subject>Agronomy. Soil science and plant productions</subject><subject>Biological and medical sciences</subject><subject>Cytochrome f</subject><subject>Economic plant physiology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>leaves</subject><subject>light intensity</subject><subject>Metabolism</subject><subject>Net assimilation, photosynthesis, carbon metabolism. Photorespiration, respiration, fermentation (anoxia, hypoxia)</subject><subject>Nutrition. Photosynthesis. Respiration. Metabolism</subject><subject>P700</subject><subject>Photosynthesis, respiration. Anabolism, catabolism</subject><subject>Photosynthetic unit</subject><subject>Plant physiology and development</subject><subject>Sorghum bicolor</subject><issn>0032-0781</issn><issn>1471-9053</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1983</creationdate><recordtype>article</recordtype><recordid>eNpVkF1rFDEUhoMouFb_QxDxbtZkMzNJvCtbbSsLFrUg3oRM5qSbOptsczLS_vum7FLw6nw95z2Hl5D3nC050-JTuvcpj7dpztFOuNy7_dIy2fc9e0EWvJW80awTL8mCMbFqmFT8NXmDeMtYzQVbkHC1TSXhQyxbKMHR6xgKUhtHurZ5SJGeIoZdmGwJtQiRbsD-A6TJ0_Nsa_0z5ZvtvKNzHCHTs-A9ZIiFbsLNttDLWCBiKAHwLXnl64_w7hhPyPXXL7_WF83m-_nl-nTTONHz0vTctsq3LayUHqBzMIwtdB2XTDvnNPfKejaMzotBrXrdWnCK6doYXKVHIU7Ix4PuPqe7GbCYXUAH02QjpBkNF1pr1XcV_HwAXU6IGbzZ57Cz-cFwZp7cNf-7a6q75uhuXf5wvGLR2clnG13AZwXdSS57VbHmgAUscP88tvmv6aWQnbn4_cdc_ThTsv3WmVY8AumNk8E</recordid><startdate>19830101</startdate><enddate>19830101</enddate><creator>Chenga Reddy, V.</creator><creator>Raghavendra, A. S.</creator><creator>Das, V. S. 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Psychology</topic><topic>leaves</topic><topic>light intensity</topic><topic>Metabolism</topic><topic>Net assimilation, photosynthesis, carbon metabolism. Photorespiration, respiration, fermentation (anoxia, hypoxia)</topic><topic>Nutrition. Photosynthesis. Respiration. Metabolism</topic><topic>P700</topic><topic>Photosynthesis, respiration. Anabolism, catabolism</topic><topic>Photosynthetic unit</topic><topic>Plant physiology and development</topic><topic>Sorghum bicolor</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chenga Reddy, V.</creatorcontrib><creatorcontrib>Raghavendra, A. S.</creatorcontrib><creatorcontrib>Das, V. S. R.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biochemistry Abstracts 1</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Plant and cell physiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chenga Reddy, V.</au><au>Raghavendra, A. S.</au><au>Das, V. S. R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photosynthetic Units and Carbon Assimilation in Leaves of Grain Sorghum under Different Light Intensities</atitle><jtitle>Plant and cell physiology</jtitle><date>1983-01-01</date><risdate>1983</risdate><volume>24</volume><issue>8</issue><spage>1395</spage><epage>1400</epage><pages>1395-1400</pages><issn>0032-0781</issn><eissn>1471-9053</eissn><coden>PCPHA5</coden><abstract>The Cyt f and P700 contents in leaves of three Sorghum, varieties were measured, in relation to their carbon assimilation, under different light intensities during growth. At the maximum irradiation used (1,800 μE m−2 s−1) the ratio of P700 to Cyt f was close to unity, whereas under low irradiation (450 μE m−2 s−1) the ratio of P700 to Cyt f ranged from two to three. A strikingly positive correlation existed between the P700 contents of the leaves and their rates of carbon dioxide fixation, dry matter production and Cyt f contents, only when the plants were grown under high light intensities. The P700 content of the leaves in plants grown under low irradiation was unrelated to the contents of Cyt f. Thus, at a high light intensity there is a close relationship between the Cyt f and P700 levels, but at low intensities the amounts of electron carriers and the reaction centre are independent.</abstract><cop>Oxford</cop><pub>Oxford University Press</pub><doi>10.1093/oxfordjournals.pcp.a076660</doi><tpages>6</tpages></addata></record> |
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| ispartof | Plant and cell physiology, 1983-01, Vol.24 (8), p.1395-1400 |
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| source | Freely Accessible Japanese Titles; Oxford University Press Journals Digital Archive Legacy |
| subjects | Agronomy. Soil science and plant productions Biological and medical sciences Cytochrome f Economic plant physiology Fundamental and applied biological sciences. Psychology leaves light intensity Metabolism Net assimilation, photosynthesis, carbon metabolism. Photorespiration, respiration, fermentation (anoxia, hypoxia) Nutrition. Photosynthesis. Respiration. Metabolism P700 Photosynthesis, respiration. Anabolism, catabolism Photosynthetic unit Plant physiology and development Sorghum bicolor |
| title | Photosynthetic Units and Carbon Assimilation in Leaves of Grain Sorghum under Different Light Intensities |
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