Increase in unsaturated fatty acids in membrane lipids of Suaeda salsa L. enhances protection of photosystem II under high salinity

Sui, Na; Li, M.; Li, K.; Song, Jie; Wang, B. S.

doi:10.1007/s11099-010-0080-x

Cited by 130 publications

(98 citation statements)

References 37 publications

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“…Numerous studies have shown that salinity stress predisposes photosystem II (PSII) to photoinhibitory damage (Lu et al 2002;Maricle et al 2007;Hichem et al 2009;Qin et al 2010Qin et al , 2011Sui et al 2010). However, very little attention has been paid to the responses of PSII to salinity stress and high-temperature stress in combination (Henley et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Changes in photosynthesis, chlorophyll fluorescence, and antioxidant enzymes of mulberry (Morus ssp.) in response to salinity and high-temperature stress

Huang

et al. 2013

Biologia

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Photosynthesis, chlorophyll (Chl) fluorescence, and antioxidant enzymes were measured in the mulberry (Morus spp.) cultivars Da 10, Hongguo 2, Anza 1, and Taiwan 72C002, which were subjected to salinity and high-temperature stress (STS; 0.1%, 0.3%, and 0.5% NaCl concentrations, 34.5• C day/night temperatures). Control plants were watered with 1 L of full-strength Hoagland's nutrient solution with no added NaCl. Net photosynthetic rate (PN), stomatal conductance (gs), and effective quantum yield of photosystem II photochemistry (ΦPSII) increased in Anza 1 and Taiwan 72C002 under 0.1% STS but decreased in Da 10 and Hongguo 2 compared with the control. However, all the above parameters, including Chl content, maximum quantum yield of photosystem II photochemistry (Fv/Fm), nonphotochemical quenching (NPQ), and maximum carboxylation velocity of Rubisco (Vcmax, decreased in Taiwan 72C002, Honggua 2, and Da 10 under 0.3% and 0.5% STS, suggesting that photoinhibition occurred under severe STS. Under STS, there were no significant changes in PN, Fv/Fm, ΦPSII, ascorbate peroxidase (APX) activity, superoxide dismutase (SOD) activity, catalase activity, superoxide anion radical (O − 2 ) content, malondialdehyde (MDA) content, soluble sugar content (SSC), and leaf biomass in Anza 1 even at 0.5% STS, showing that Anza 1 displays high resistance to STS. In addition, peroxidase activity was significantly higher in Anza 1 than in the other mulberry cultivars. Significant adverse effects of severe salinity on photosynthesis and Chl fluorescence parameters were observed in Da 10. Additionally, SOD, peroxidase, and APX activities were lower in Da 10, whereas O − 2 and MDA contents were higher in comparison with the other mulberry cultivars under 0.3% and 0.5% STS, suggesting that Da 10 had low resistance to STS. These results show that 0.1% STS had a positive effect on photosynthesis and Chl fluorescence parameters in Anza 1 and Taiwan 72C002, and higher peroxidase activity can to a certain extent explain the higher STS tolerance in Anza 1. Damages to DSM photosystems might be related to lower SOD, POD, and APX activities, which resulted in the accumulation of reactive oxygen species.Key words: antioxidant enzymes; chlorophyll fluorescence; gas exchange; proline content; soluble sugar content; superoxide anion radical Abbreviations: APX, ascorbate peroxidase; AQY, apparent quantum yield; Ca, atmospheric CO2 concentration; CE, carboxylation efficiency; Ci, intercellular CO2 concentration; Chl, chlorophyll; E, transpiration rate; F0, minimum fluorescence level; Fm, maximum fluorescence level; Fv/Fm, maximum quantum yield of photosystem II photochemistry; FS, steady-state yield of PSII fluorescence in the light; gs, stomatal conductance; Ls, stomatal limitation value; MDA, malondialdehyde; NPQ, non-photochemical quenching; O − 2 , superoxide anion radical; PAR, photosynthetically active radiation; PN, net photosynthetic rate; PPBS, potassium phosphate buffer solution; PSII, photosystem II; ΦPSII, effective quantum yield of p...

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Section: Introductionmentioning

confidence: 99%

Changes in photosynthesis, chlorophyll fluorescence, and antioxidant enzymes of mulberry (Morus ssp.) in response to salinity and high-temperature stress

Huang

et al. 2013

Biologia

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“…The concentration of NaCl increased 50 mM every day until it reached a final concentration. Measuring physiological indexes after treated with NaCl for 5 days (Sui et al, 2010).…”

Section: Plant Cultivation and Treatmentmentioning

confidence: 99%

“…For quantitative analysis, lipids were separated by TLC. The individual lipids was then measured by gas chromatography (GC-9A, Shimadzu, Japan) as described by Sui et al (2010).…”

Section: Lipid Extraction and Analysismentioning

confidence: 99%

“…The data of minimal fluorescence (Fo), variable fluorescence (Fv), maximal fluorescence (Fm), steady-state fluorescence (Fs) was recorded. The maximal photochemical efficiency of PSII: Fv / Fm = (Fm -Fo) / Fm, the actural photochemical efficiency of PSII: ΦPSII = (Fm' -Fs) / Fm' (Sui et al, 2010).…”

Section: Measurements Of Chlorophyll Fluorescencementioning

confidence: 99%

“…In order to protect the photosynthetic apparatus in the slow phase, the desaturation of fatty acids was completely effective (Allakhverdiev, Kinoshita, Inaba, Suzuki, & Murata, 2001). Although some studies have done some research in the level of fatty acid desaturation during salt stress of halophytes (Ben Hamed, Ben Youssef, Ranieri, Zarrouk, & Abdelly, 2005;Ramani, Zorn, Papenbrock, 2004;Sui, M. Li, K. Li, Song, & Wang, 2010), the relationship between the PSII protection mechanism in halophytes and fatty acid desaturation was still ambiguous in a saline environment.…”

Section: Introductionmentioning

confidence: 99%

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Increases of Unsaturated Fatty Acids in Membrane Lipids Protects Photosystem II from Photoinhibition under Salinity in Different Halophytes

Sui¹,

Han²

2014

JAS

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For the purpose of testing the function of unsaturated fatty acids in different halophytes in the process of photosynthesis under salt stress, the impact of saline stress on plant development, content of chlorophyll, the PSII photochemistry efficiency, content of membrane lipid and composition of fatty acid were investigated in the three halophytes Thellungiella halophila, Limonium bicolor and Suaeda salsa and non-halophyte Arabidopsis thaliana. Salinity (200 mM NaCl) did not reduce the value of Fv/Fm, ΦPSII, and chlorophyll content in the halophytes. While all of them decreased by 200 mM NaCl treatment in A. thaliana. In the non-halophytic, A. thaliana, when treated with NaCl, the content of unsaturated fatty acid and the DBI of membrane lipids MGDG, SQDG, PG and PC decreased. While the unsaturated fatty acid content and the DBI of T. halophila, L. bicolor and S. salsa increased. The DBI of total lipids increased in all halophytes but decreased in the non-halophyte, A. thaliana. The proportion of PG increased in T. halophila and S. salsa. It decreased in L. bicolor and A. thaliana. The DGDG (digalactosyldiacylglycerols)/MGDG (monogalactosyldiacylglycerols) ratio of S. salsa increased from 1.20 to 1.35, while it decreased in T. halophila, L. bicolor and A. thaliana under salt stress. These results suggest that unsaturated fatty acid levels increase in the halophytes under salt stress relative to the non-halophyte A. thaliana. The proportion of membrane lipids and unsaturated fatty acids is related to different levels of salt tolerance among different halophytes.

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Biological features and regulatory mechanisms of salt tolerance in plants

Liu

2019

J of Cellular Biochemistry

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Halophytes play a vital role in saline agriculture because these plants are necessary to increase the food supply to meet the demands of the growing world population. In addition, the transfer of salt-resistance genes from halophytes using genetic technologies has the potential to increase the salt tolerance of xerophytes. Characterization of some particularly promising halophyte model organisms has revealed the important new insights into the salt tolerance mechanisms used by plants. Numerous advances using these model systems have improved our understanding of salt tolerance regulation and salt tolerance-associated changes in gene expression, and these mechanisms have important implications for saline agriculture. Recent findings provide a basis for future studies of salt tolerance in plants, as well as the development of improved strategies for saline agriculture to increase yields of food, feed, and fuel crops. K E Y W O R D Shalophyte, mechanism, model organism, saline agriculture, salt tolerance

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Increase in unsaturated fatty acids in membrane lipids of Suaeda salsa L. enhances protection of photosystem II under high salinity

Cited by 130 publications

References 37 publications

Changes in photosynthesis, chlorophyll fluorescence, and antioxidant enzymes of mulberry (Morus ssp.) in response to salinity and high-temperature stress

Changes in photosynthesis, chlorophyll fluorescence, and antioxidant enzymes of mulberry (Morus ssp.) in response to salinity and high-temperature stress

Increases of Unsaturated Fatty Acids in Membrane Lipids Protects Photosystem II from Photoinhibition under Salinity in Different Halophytes

Biological features and regulatory mechanisms of salt tolerance in plants

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