ArticleJournal of experimental botany2010
Contribution of carbon fixed by Rubisco and PEPC to phloem export in the Crassulacean acid metabolism plant Kalanchoe daigremontiana.
Article in Journal of experimental botany, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 53 citations in OpenAlex.
- Drought Impacts on Plant-Soil Carbon Allocation-Integrating Future Mean Climatic Conditions.Global change biology · 2025Article
- A Review of the Popular Uses, Anatomical, Chemical, and Biological Aspects of Kalanchoe (Crassulaceae): A Genus of Plants Known as "Miracle Leaf".Molecules (Basel, Switzerland) · 2023Review
- Post-pollination sepal longevity of female flower co-regulated by energy-associated multiple pathways in dioecious spinach.Frontiers in plant science · 2022Article
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- Time-coursed transcriptome analysis identifies key expressional regulation in growth cessation and dormancy induced by short days in Paulownia.Scientific reports · 2019Article
- Functional composition has stronger impact than species richness on carbon gain and allocation in experimental grasslands.PloS one · 2019Article
- Land use in mountain grasslands alters drought response and recovery of carbon allocation and plant-microbial interactions.The Journal of ecology · 2018Article
- Drought-Induced Accumulation of Root Exudates Supports Post-drought Recovery of Microbes in Mountain Grassland.Frontiers in plant science · 2018Article
- Phosphorylation of PhosphoThe Plant cell · 2017Article
- Microbial metabolism mediates interactions between dissolved organic matter and clay minerals in streamwater.Scientific reports · 2016Article
- Plant-derived compounds stimulate the decomposition of organic matter in arctic permafrost soils.Scientific reports · 2016Article
- Summer drought alters carbon allocation to roots and root respiration in mountain grassland.The New phytologist · 2015Article
- Input of easily available organic C and N stimulates microbial decomposition of soil organic matter in arctic permafrost soil.Soil biology & biochemistry · 2014Article
- Responses of belowground carbon allocation dynamics to extended shading in mountain grassland.The New phytologist · 2013Article
- Host-compound foraging by intestinal microbiota revealed by single-cell stable isotope probing.Proceedings of the National Academy of Sciences of the United States of America · 2013Article
- Influence of litter chemistry and stoichiometry on glucan depolymerization during decomposition of beech (Fagus sylvatica L.) litter.Soil biology & biochemistry · 2012Article
- Rate of belowground carbon allocation differs with successional habit of two afromontane trees.PloS one · 2012Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Crassulacean acid metabolism (CAM) plants exhibit a complex interplay between CO(2) fixation by phosphoenolpyruvate carboxylase (PEPC) and ribulose-1,5-bisphosphate carboxylase oxygenase (Rubisco), and carbon demand for CAM maintenance and growth. This study investigated the flux of carbon from PEPC and direct Rubisco fixation to different leaf carbon pools and to phloem sap over the diurnal cycle. Concentrations and carbon isotope compositions of starch, soluble sugars, and organic acids were determined in leaves and phloem exudates of Kalanchoë daigremontiana Hamet et Perr., and related to CO(2) fixation by PEPC and Rubisco. Three types of leaf carbon pools could be distinguished. (i) Starch and malate pools were dominant and showed a pattern of reciprocal mobilization and accumulation (85/54 and 13/48 mg C g(-1) DW, respective, at the beginning/end of phase I). The carbon isotope composition of these pools was compatible with predominant PEPC fixation (delta(13)C values of -13 and -11 per thousand for starch and malate compared to -11 per thousand of PEPC fixed carbon). (ii) Isotopic composition (-17 per thousand and -14 per thousand) and concentration of glucose and fructose (2 and 3 mg C g(-1) DW, respectively) were not affected by diurnal metabolism, suggesting a low turnover. (iii) Sucrose (1-3 mg C g(-1) DW), in contrast, exhibited large diurnal changes in delta(13)C values (from -17 per thousand in the evening to -12 per thousand in the morning), which were not matched by net changes in sucrose concentration. This suggests a high sucrose turnover, fed by nocturnal starch degradation and direct Rubisco fixation during the day. A detailed dissection of the carbon fixation and mobilization pattern in K. daigremontiana revealed that direct fixation of Rubisco during the light accounted for 30% of phloem sucrose, but only 15% of fixed carbon, indicating that carbon from direct Rubisco fixation was preferentially used for leaf export.
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