Zulfira Rakhmankulova, Elena Shuyskaya, Maria Prokofieva, Kristina Toderich, Pavel Voronin
{"title":"高浓度二氧化碳和盐度条件下 Sedobassia sedoides (Pall.) Freitag & G. Kadereit 光呼吸碳浓度机制的可塑性","authors":"Zulfira Rakhmankulova, Elena Shuyskaya, Maria Prokofieva, Kristina Toderich, Pavel Voronin","doi":"10.1007/s40333-024-0018-y","DOIUrl":null,"url":null,"abstract":"<p>Rising atmospheric CO<sub>2</sub> (carbon dioxide) concentrations and salinization are manifestations of climate change that affect plant growth and productivity. Species with an intermediate C<sub>3</sub>–C<sub>4</sub> type of photosynthesis live in a wide range of precipitation, temperature, and soil quality, but are more often found in warm and dry habitats. One of the intermediate C<sub>3</sub>–C<sub>4</sub> photosynthetic type is C<sub>2</sub> photosynthesis with a carbon concentration mechanism (CCM) that reassimilates CO<sub>2</sub> released via photorespiration. However, the ecological significance under which C<sub>2</sub> photosynthesis has advantages over C<sub>3</sub> and C<sub>4</sub> plants remains largely unexplored. Salt tolerance and functioning of CCM were studied in plants from two populations (P1 and P2) of <i>Sedobassia sedoides</i> (Pall.) Freitag & G. Kadereit Asch. species with C<sub>2</sub> photosynthesis exposed to 4 d and 10 d salinity (200 mM NaCl) at ambient (785.7 mg/m<sup>3</sup>, aCO<sub>2</sub>) and elevated (1571.4 mg/m<sup>3</sup>, eCO<sub>2</sub>) CO<sub>2</sub>. On the fourth day of salinity, an increase in Na<sup>+</sup> content, activity catalase, and superoxide dismutase was observed in both populations. P2 plants showed an increase in proline content and a decrease in photosynthetic enzyme content: rubisco, phosphoenolpyruvate carboxylase (PEPC), and glycine decarboxylase (GDC), which indicated a weakening of C<sub>2</sub> and C<sub>4</sub> characteristics under salinity. Treatment under 10 d salinity led to an increased Na<sup>+</sup> content and activity of cyclic electron flow around photosystem I (PSI CEF), a decreased content of K<sup>+</sup> and GDC in both populations. P1 plants showed greater salt tolerance, which was assessed by the degree of reduction in photosynthetic enzyme content, PSI CEF activity, and changes in relative growth rate (RGR). Differences between populations were evident under the combination of eCO<sub>2</sub> and salinity. Under long-term salinity and eCO<sub>2</sub>, more salt-tolerant P1 plants had a higher dry biomass (DW), which was positively correlated with PSI CEF activity. In less salt-tolerant P2 plants, DW correlated with transpiration and dark respiration. Thus, <i>S. sedoides</i> showed a high degree of photosynthetic plasticity under the influence of salinity and eCO<sub>2</sub> through strengthening (P1 plants) and weakening C<sub>4</sub> characteristics (P2 plants).</p>","PeriodicalId":49169,"journal":{"name":"Journal of Arid Land","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Plasticity of photorespiratory carbon concentration mechanism in Sedobassia sedoides (Pall.) Freitag & G. Kadereit under elevated CO2 concentration and salinity\",\"authors\":\"Zulfira Rakhmankulova, Elena Shuyskaya, Maria Prokofieva, Kristina Toderich, Pavel Voronin\",\"doi\":\"10.1007/s40333-024-0018-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Rising atmospheric CO<sub>2</sub> (carbon dioxide) concentrations and salinization are manifestations of climate change that affect plant growth and productivity. Species with an intermediate C<sub>3</sub>–C<sub>4</sub> type of photosynthesis live in a wide range of precipitation, temperature, and soil quality, but are more often found in warm and dry habitats. One of the intermediate C<sub>3</sub>–C<sub>4</sub> photosynthetic type is C<sub>2</sub> photosynthesis with a carbon concentration mechanism (CCM) that reassimilates CO<sub>2</sub> released via photorespiration. However, the ecological significance under which C<sub>2</sub> photosynthesis has advantages over C<sub>3</sub> and C<sub>4</sub> plants remains largely unexplored. Salt tolerance and functioning of CCM were studied in plants from two populations (P1 and P2) of <i>Sedobassia sedoides</i> (Pall.) Freitag & G. Kadereit Asch. species with C<sub>2</sub> photosynthesis exposed to 4 d and 10 d salinity (200 mM NaCl) at ambient (785.7 mg/m<sup>3</sup>, aCO<sub>2</sub>) and elevated (1571.4 mg/m<sup>3</sup>, eCO<sub>2</sub>) CO<sub>2</sub>. On the fourth day of salinity, an increase in Na<sup>+</sup> content, activity catalase, and superoxide dismutase was observed in both populations. P2 plants showed an increase in proline content and a decrease in photosynthetic enzyme content: rubisco, phosphoenolpyruvate carboxylase (PEPC), and glycine decarboxylase (GDC), which indicated a weakening of C<sub>2</sub> and C<sub>4</sub> characteristics under salinity. Treatment under 10 d salinity led to an increased Na<sup>+</sup> content and activity of cyclic electron flow around photosystem I (PSI CEF), a decreased content of K<sup>+</sup> and GDC in both populations. P1 plants showed greater salt tolerance, which was assessed by the degree of reduction in photosynthetic enzyme content, PSI CEF activity, and changes in relative growth rate (RGR). Differences between populations were evident under the combination of eCO<sub>2</sub> and salinity. Under long-term salinity and eCO<sub>2</sub>, more salt-tolerant P1 plants had a higher dry biomass (DW), which was positively correlated with PSI CEF activity. In less salt-tolerant P2 plants, DW correlated with transpiration and dark respiration. Thus, <i>S. sedoides</i> showed a high degree of photosynthetic plasticity under the influence of salinity and eCO<sub>2</sub> through strengthening (P1 plants) and weakening C<sub>4</sub> characteristics (P2 plants).</p>\",\"PeriodicalId\":49169,\"journal\":{\"name\":\"Journal of Arid Land\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-07-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Arid Land\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1007/s40333-024-0018-y\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Arid Land","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s40333-024-0018-y","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Plasticity of photorespiratory carbon concentration mechanism in Sedobassia sedoides (Pall.) Freitag & G. Kadereit under elevated CO2 concentration and salinity
Rising atmospheric CO2 (carbon dioxide) concentrations and salinization are manifestations of climate change that affect plant growth and productivity. Species with an intermediate C3–C4 type of photosynthesis live in a wide range of precipitation, temperature, and soil quality, but are more often found in warm and dry habitats. One of the intermediate C3–C4 photosynthetic type is C2 photosynthesis with a carbon concentration mechanism (CCM) that reassimilates CO2 released via photorespiration. However, the ecological significance under which C2 photosynthesis has advantages over C3 and C4 plants remains largely unexplored. Salt tolerance and functioning of CCM were studied in plants from two populations (P1 and P2) of Sedobassia sedoides (Pall.) Freitag & G. Kadereit Asch. species with C2 photosynthesis exposed to 4 d and 10 d salinity (200 mM NaCl) at ambient (785.7 mg/m3, aCO2) and elevated (1571.4 mg/m3, eCO2) CO2. On the fourth day of salinity, an increase in Na+ content, activity catalase, and superoxide dismutase was observed in both populations. P2 plants showed an increase in proline content and a decrease in photosynthetic enzyme content: rubisco, phosphoenolpyruvate carboxylase (PEPC), and glycine decarboxylase (GDC), which indicated a weakening of C2 and C4 characteristics under salinity. Treatment under 10 d salinity led to an increased Na+ content and activity of cyclic electron flow around photosystem I (PSI CEF), a decreased content of K+ and GDC in both populations. P1 plants showed greater salt tolerance, which was assessed by the degree of reduction in photosynthetic enzyme content, PSI CEF activity, and changes in relative growth rate (RGR). Differences between populations were evident under the combination of eCO2 and salinity. Under long-term salinity and eCO2, more salt-tolerant P1 plants had a higher dry biomass (DW), which was positively correlated with PSI CEF activity. In less salt-tolerant P2 plants, DW correlated with transpiration and dark respiration. Thus, S. sedoides showed a high degree of photosynthetic plasticity under the influence of salinity and eCO2 through strengthening (P1 plants) and weakening C4 characteristics (P2 plants).
期刊介绍:
The Journal of Arid Land is an international peer-reviewed journal co-sponsored by Xinjiang Institute of Ecology and Geography, the Chinese Academy of Sciences and Science Press. It aims to meet the needs of researchers, students and practitioners in sustainable development and eco-environmental management, focusing on the arid and semi-arid lands in Central Asia and the world at large.
The Journal covers such topics as the dynamics of natural resources (including water, soil and land, organism and climate), the security and sustainable development of natural resources, and the environment and the ecology in arid and semi-arid lands, especially in Central Asia. Coverage also includes interactions between the atmosphere, hydrosphere, biosphere, and lithosphere, and the relationship between these natural processes and human activities. Also discussed are patterns of geography, ecology and environment; ecological improvement and environmental protection; and regional responses and feedback mechanisms to global change. The Journal of Arid Land also presents reviews, brief communications, trends and book reviews of work on these topics.