Drought stress affects chloroplast lipid metabolism in rape (Brassica napus) leaves
Rape (Brassica napus L. var. Bienvenue) is a 16:3 plant which contains predominantly prokaryotic species of monogalactosyldiacylglycerol i.e. sn‐1 C18, sn‐2 C16 (C18/C16 MGDG). Rape plants were exposed to a restricted water supply for 12 days. Under drought conditions, considerable changes in lipid...
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| Veröffentlicht in: | Physiologia plantarum 2002-06, Vol.115 (2), p.221-227 |
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| creator | Benhassaine‐Kesri, Ghouziel Aid, Fatiha Demandre, Chantal Kader, Jean‐Claude Mazliak, Paul |
| description | Rape (Brassica napus L. var. Bienvenue) is a 16:3 plant which contains predominantly prokaryotic species of monogalactosyldiacylglycerol i.e. sn‐1 C18, sn‐2 C16 (C18/C16 MGDG). Rape plants were exposed to a restricted water supply for 12 days. Under drought conditions, considerable changes in lipid metabolism were observed. Drought stress provoked a decline in leaf polar lipids, which is mainly due to a decrease in MGDG content. Determination of molecular species in phosphatidylcholine (PC) and MGDG indicated that the prokaryotic molecular species of MGDG (C18/C16) decreased after drought stress while the eukaryotic molecular species (C18/C18) remained stable. Drought stress had different effects on two key enzymes of PC and MGDG synthesis. The in vitro activity of MGDG synthase (EC. 2.4.1.46) was reduced in drought stressed plants whereas cholinephosphotransferase (EC. 2.7.8.2) activity was not affected. Altogether these results suggest that the prokaryotic pathway leading to MGDG synthesis was strongly affected by drought stress while the eukaryotic pathway was not. It was also observed that the molecular species of leaf PC became more saturated in drought stressed plants. This could be due to a specific decrease in oleate desaturase activity. |
| doi_str_mv | 10.1034/j.1399-3054.2002.1150207.x |
| format | Article |
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Bienvenue) is a 16:3 plant which contains predominantly prokaryotic species of monogalactosyldiacylglycerol i.e. sn‐1 C18, sn‐2 C16 (C18/C16 MGDG). Rape plants were exposed to a restricted water supply for 12 days. Under drought conditions, considerable changes in lipid metabolism were observed. Drought stress provoked a decline in leaf polar lipids, which is mainly due to a decrease in MGDG content. Determination of molecular species in phosphatidylcholine (PC) and MGDG indicated that the prokaryotic molecular species of MGDG (C18/C16) decreased after drought stress while the eukaryotic molecular species (C18/C18) remained stable. Drought stress had different effects on two key enzymes of PC and MGDG synthesis. The in vitro activity of MGDG synthase (EC. 2.4.1.46) was reduced in drought stressed plants whereas cholinephosphotransferase (EC. 2.7.8.2) activity was not affected. Altogether these results suggest that the prokaryotic pathway leading to MGDG synthesis was strongly affected by drought stress while the eukaryotic pathway was not. It was also observed that the molecular species of leaf PC became more saturated in drought stressed plants. This could be due to a specific decrease in oleate desaturase activity.</description><identifier>ISSN: 0031-9317</identifier><identifier>EISSN: 1399-3054</identifier><identifier>DOI: 10.1034/j.1399-3054.2002.1150207.x</identifier><identifier>PMID: 12060239</identifier><identifier>CODEN: PHPLAI</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Science, Ltd</publisher><subject>Biological and medical sciences ; Fundamental and applied biological sciences. Psychology ; Metabolism ; Metabolism. Physicochemical requirements ; Phytopathology. Animal pests. Plant and forest protection ; Plant physiology and development ; Weather damages ; Weather damages. 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Bienvenue) is a 16:3 plant which contains predominantly prokaryotic species of monogalactosyldiacylglycerol i.e. sn‐1 C18, sn‐2 C16 (C18/C16 MGDG). Rape plants were exposed to a restricted water supply for 12 days. Under drought conditions, considerable changes in lipid metabolism were observed. Drought stress provoked a decline in leaf polar lipids, which is mainly due to a decrease in MGDG content. Determination of molecular species in phosphatidylcholine (PC) and MGDG indicated that the prokaryotic molecular species of MGDG (C18/C16) decreased after drought stress while the eukaryotic molecular species (C18/C18) remained stable. Drought stress had different effects on two key enzymes of PC and MGDG synthesis. The in vitro activity of MGDG synthase (EC. 2.4.1.46) was reduced in drought stressed plants whereas cholinephosphotransferase (EC. 2.7.8.2) activity was not affected. Altogether these results suggest that the prokaryotic pathway leading to MGDG synthesis was strongly affected by drought stress while the eukaryotic pathway was not. It was also observed that the molecular species of leaf PC became more saturated in drought stressed plants. This could be due to a specific decrease in oleate desaturase activity.</description><subject>Biological and medical sciences</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Metabolism</subject><subject>Metabolism. Physicochemical requirements</subject><subject>Phytopathology. Animal pests. Plant and forest protection</subject><subject>Plant physiology and development</subject><subject>Weather damages</subject><subject>Weather damages. 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Psychology</topic><topic>Metabolism</topic><topic>Metabolism. Physicochemical requirements</topic><topic>Phytopathology. Animal pests. Plant and forest protection</topic><topic>Plant physiology and development</topic><topic>Weather damages</topic><topic>Weather damages. Fires</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Benhassaine‐Kesri, Ghouziel</creatorcontrib><creatorcontrib>Aid, Fatiha</creatorcontrib><creatorcontrib>Demandre, Chantal</creatorcontrib><creatorcontrib>Kader, Jean‐Claude</creatorcontrib><creatorcontrib>Mazliak, Paul</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Physiologia plantarum</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Benhassaine‐Kesri, Ghouziel</au><au>Aid, Fatiha</au><au>Demandre, Chantal</au><au>Kader, Jean‐Claude</au><au>Mazliak, Paul</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Drought stress affects chloroplast lipid metabolism in rape (Brassica napus) leaves</atitle><jtitle>Physiologia plantarum</jtitle><addtitle>Physiol Plant</addtitle><date>2002-06</date><risdate>2002</risdate><volume>115</volume><issue>2</issue><spage>221</spage><epage>227</epage><pages>221-227</pages><issn>0031-9317</issn><eissn>1399-3054</eissn><coden>PHPLAI</coden><abstract>Rape (Brassica napus L. var. Bienvenue) is a 16:3 plant which contains predominantly prokaryotic species of monogalactosyldiacylglycerol i.e. sn‐1 C18, sn‐2 C16 (C18/C16 MGDG). Rape plants were exposed to a restricted water supply for 12 days. Under drought conditions, considerable changes in lipid metabolism were observed. Drought stress provoked a decline in leaf polar lipids, which is mainly due to a decrease in MGDG content. Determination of molecular species in phosphatidylcholine (PC) and MGDG indicated that the prokaryotic molecular species of MGDG (C18/C16) decreased after drought stress while the eukaryotic molecular species (C18/C18) remained stable. Drought stress had different effects on two key enzymes of PC and MGDG synthesis. The in vitro activity of MGDG synthase (EC. 2.4.1.46) was reduced in drought stressed plants whereas cholinephosphotransferase (EC. 2.7.8.2) activity was not affected. Altogether these results suggest that the prokaryotic pathway leading to MGDG synthesis was strongly affected by drought stress while the eukaryotic pathway was not. It was also observed that the molecular species of leaf PC became more saturated in drought stressed plants. This could be due to a specific decrease in oleate desaturase activity.</abstract><cop>Oxford, UK</cop><pub>Blackwell Science, Ltd</pub><pmid>12060239</pmid><doi>10.1034/j.1399-3054.2002.1150207.x</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Biological and medical sciences Fundamental and applied biological sciences. Psychology Metabolism Metabolism. Physicochemical requirements Phytopathology. Animal pests. Plant and forest protection Plant physiology and development Weather damages Weather damages. Fires |
| title | Drought stress affects chloroplast lipid metabolism in rape (Brassica napus) leaves |
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