Sulphoquinovosyl Diacylglycerol (SQDG) — The Sulpholipid of Higher Plants

Harwood, John L.; Okanenko, A. A.

doi:10.1007/978-94-017-0289-8_11

Cited by 15 publications

(5 citation statements)

References 123 publications

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“…1 ; Table 3 ). A Similar phenomenon was found in some algae and lichens [ 43 , 44 ]. SQDG was also found in cyanobacteria and non-photosynthetic bacteria [ 43 ].…”

Section: Discussionsupporting

confidence: 85%

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Differences in lipid homeostasis and membrane lipid unsaturation confer differential tolerance to low temperatures in two Cycas species

Yang²,

Wang

et al. 2021

BMC Plant Biol

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Background C. panzhihuaensis is more tolerant to freezing than C. bifida but the mechanisms underlying the different freezing tolerance are unclear. Photosynthesis is one of the most temperature-sensitive processes. Lipids play important roles in membrane structure, signal transduction and energy storage, which are closely related to the stress responses of plants. In this study, the chlorophyll fluorescence parameters and lipid profiles of the two species were characterized to explore the changes in photosynthetic activity and lipid metabolism following low-temperature exposure and subsequent recovery. Results Photosynthetic activity significantly decreased in C. bifida with the decrease of temperatures and reached zero after recovery. Photosynthetic activity, however, was little affected in C. panzhihuaensis. The lipid composition of C. bifida was more affected by cold and freezing treatments than C. panzhihuaensis. Compared with the control, the proportions of all the lipid categories recovered to the original level in C. panzhihuaensis, but the proportions of most lipid categories changed significantly in C. bifida after 3 d of recovery. In particular, the glycerophospholipids and prenol lipids degraded severely during the recovery period of C. bifida. Changes in acyl chain length and double bond index (DBI) occurred in more lipid classes immediately after low-temperature exposure in C. panzhihuaensis compare with those in C. bifida. DBI of the total main membrane lipids of C. panzhihuaensis was significantly higher than that of C. bifida following all temperature treatments. Conclusions The results of chlorophyll fluorescence parameters confirmed that the freezing tolerance of C. panzhihuaensis was greater than that of C. bifida. The lipid metabolism of the two species had differential responses to low temperatures. The homeostasis and plastic adjustment of lipid metabolism and the higher level of DBI of the main membrane lipids may contribute to the greater tolerance of C. panzhihuaensis to low temperatures.

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“…1 ; Table 3 ). A Similar phenomenon was found in some algae and lichens [ 43 , 44 ]. SQDG was also found in cyanobacteria and non-photosynthetic bacteria [ 43 ].…”

Section: Discussionsupporting

confidence: 85%

“…A Similar phenomenon was found in some algae and lichens [ 43 , 44 ]. SQDG was also found in cyanobacteria and non-photosynthetic bacteria [ 43 ]. The high content of SQDG in the two Cycas species might be related to the highly diverse endophytic microbiome such as cyanobacteria and actinomycetes [ 45 , 46 ].…”

Section: Discussionsupporting

confidence: 85%

Differences in lipid homeostasis and membrane lipid unsaturation confer differential tolerance to low temperatures in two Cycas species

Yang²,

Wang

et al. 2021

BMC Plant Biol

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show abstract

“…1; Table 3). Similar phenomenon was found in some algaes and lichens [41,42]. As SQDG were also found in cyanobacteria and non-photosynthetic bacteria [41].…”

Section: The Changes Of Composition Of the Lipid Categoriessupporting

confidence: 73%

“…Similar phenomenon was found in some algaes and lichens [41,42]. As SQDG were also found in cyanobacteria and non-photosynthetic bacteria [41]. The so high content of SQDG in the two Cycas species might be related to the highly diverse endophytic microbiome such as cyanobacteria and actinomycetes [43,44].…”

Section: The Changes Of Composition Of the Lipid Categoriesmentioning

confidence: 64%

The Differential Responses of Chlorophyll Fluorescence Parameters and Lipid Metabolism to Low Temperature between Cycas Bifida and C. panzhihuaensis

Zheng

Wang

et al. 2020

Preprint

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Background: Our previous work showed that freezing tolerance of Cycas panzhihuaensis was higher than that of C. bifida. However, the mechanisms underlying the differential freezing tolerance of the two species is not clear. Photosynthesis is one of the most temperature-sensitive processes. Lipids play important roles in membrane structure, signal transduction and energy storage which are closely related to stress response of plants. Hence, the chlorophyll fluorescence parameters and lipid profiles of the two species were characterized to explore the dynamic changes of photosynthetic activity and lipid metabolism following low temperature and subsequent recovery. Results: The photosynthetic activity decreased significantly with the decrease of temperatures in C. bifida, reaching to zero after recovery, which however, was little affected in C. panzhihuaensis. Lipid composition of C. bifida was more affected by cold and freezing treatments than C. panzhihuaensis. Compared to the control, the proportions of all the lipid categories recovered to the original level for C. panzhihuaensis but those of most lipid categories changed significantly for C. bifida after 3 d of recovery. Particularly, the glycerophospholipids and prenol lipids of C. bifida degraded severely during recovery period for C. bifida. The changes of acyl chain length and double bond index (DBI) occurred in more lipid classes immediately after low temperatures in C. panzhihuaensis than those in C. bifida. DBI of the total main membrane lipids of C. panzhihuaensis was significantly higher than that of C. bifida following all the treatments. Conclusions: The results of chlorophyll fluorescence parameters confirmed that the freezing tolerance of C. panzhihuaensis was higher than that of C. bifida. The lipid metabolism of the two species had differential responses to low temperatures. The homeostasis and plastic adjustment of lipid metabolism and the higher level of DBI of the main membrane lipids might contribute to the higher tolerance of C. panzhihuaensis to low temperature.

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“…The major organic storage form of excessive S is sulfolipid, i.e., sulfoquinovosyl diacylglycerol (SQDG) (Benning 1998;Harwood and Okanenko 2003;Frentzen 2004). SQDG forms a large fraction of organic S in the biosphere and a major S sink in plant sulfur status like glutathione.…”

Section: Sulfur Metabolism In Plants As Sink For Sulfurous Compoundsmentioning

confidence: 99%

Environmental Microbial Biotechnology

Sukla¹,

Pradhan²,

Panda³

et al. 2015

Soil Biology

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Sulphoquinovosyl Diacylglycerol (SQDG) — The Sulpholipid of Higher Plants

Cited by 15 publications

References 123 publications

Differences in lipid homeostasis and membrane lipid unsaturation confer differential tolerance to low temperatures in two Cycas species

Differences in lipid homeostasis and membrane lipid unsaturation confer differential tolerance to low temperatures in two Cycas species

The Differential Responses of Chlorophyll Fluorescence Parameters and Lipid Metabolism to Low Temperature between Cycas Bifida and C. panzhihuaensis

Environmental Microbial Biotechnology

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