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Metabolic profiles of six African cultivars of cassava (Manihot esculenta Crantz) highlight bottlenecks of root yield
- Source :
- Plant journal, (2020). doi:10.1111/tpj.14693, info:cnr-pdr/source/autori:Obata T., Klemens P.A.W., Rosado-Souza L., Schlereth A., Gisel A., Stavolone L., Zierer W., Morales N., Mueller L.A., Zeeman S.C., Ludewig F., Stitt M., Sonnewald U., Neuhaus H.E., Fernie A.R./titolo:Metabolic profiles of six African cultivars of cassava (Manihot esculenta Crantz) highlight bottlenecks of root yield/doi:10.1111%2Ftpj.14693/rivista:Plant journal (Print)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume, The Plant Journal, 102 (6), The Plant Journal
- Publication Year :
- 2020
- Publisher :
- ETH Zurich, 2020.
-
Abstract
- Cassava is an important staple crop in sub‐Saharan Africa, due to its high productivity even on nutrient poor soils. The metabolic characteristics underlying this high productivity are poorly understood including the mode of photosynthesis, reasons for the high rate of photosynthesis, the extent of source/sink limitation, the impact of environment, and the extent of variation between cultivars. Six commercial African cassava cultivars were grown in a greenhouse in Erlangen, Germany, and in the field in Ibadan, Nigeria. Source leaves, sink leaves, stems and storage roots were harvested during storage root bulking and analyzed for sugars, organic acids, amino acids, phosphorylated intermediates, minerals, starch, protein, activities of enzymes in central metabolism and yield traits. High ratios of RuBisCO:phosphoenol pyruvate carboxylase activity support a C3 mode of photosynthesis. The high rate of photosynthesis is likely to be attributed to high activities of enzymes in the Calvin–Benson cycle and pathways for sucrose and starch synthesis. Nevertheless, source limitation is indicated because root yield traits correlated with metabolic traits in leaves rather than in the stem or storage roots. This situation was especially so in greenhouse‐grown plants, where irradiance will have been low. In the field, plants produced more storage roots. This was associated with higher AGPase activity and lower sucrose in the roots, indicating that feedforward loops enhanced sink capacity in the high light and low nitrogen environment in the field. Overall, these results indicated that carbon assimilation rate, the K battery, root starch synthesis, trehalose, and chlorogenic acid accumulation are potential target traits for genetic improvement.<br />The Plant Journal, 102 (6)<br />ISSN:0960-7412<br />ISSN:1365-313X
- Subjects :
- 0106 biological sciences
0301 basic medicine
Manihot
Starch
Ribulose-Bisphosphate Carboxylase
Phosphoenolpyruvate carboxylase activity
Plant Science
Biology
Photosynthesis
01 natural sciences
Plant Roots
03 medical and health sciences
chemistry.chemical_compound
Nutrient
ddc:570
Genetics
Cultivar
Enzyme activity
Nitrogen metabolism
Nitrogen cycle
Root yield
Cassava
Plant Stems
RuBisCO
Carbon fixation
food and beverages
K battery
Chlorogenic acid
Cell Biology
Source/sink limitation
Crop Production
Starch synthesis
Plant Leaves
Horticulture
030104 developmental biology
chemistry
biology.protein
Carbohydrate Metabolism
Metabolic Networks and Pathways
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 09607412 and 1365313X
- Database :
- OpenAIRE
- Journal :
- Plant journal, (2020). doi:10.1111/tpj.14693, info:cnr-pdr/source/autori:Obata T., Klemens P.A.W., Rosado-Souza L., Schlereth A., Gisel A., Stavolone L., Zierer W., Morales N., Mueller L.A., Zeeman S.C., Ludewig F., Stitt M., Sonnewald U., Neuhaus H.E., Fernie A.R./titolo:Metabolic profiles of six African cultivars of cassava (Manihot esculenta Crantz) highlight bottlenecks of root yield/doi:10.1111%2Ftpj.14693/rivista:Plant journal (Print)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume, The Plant Journal, 102 (6), The Plant Journal
- Accession number :
- edsair.doi.dedup.....726ea0939e24d1953d8ac51ffc5e4399
- Full Text :
- https://doi.org/10.3929/ethz-b-000395166