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dc.contributor.authorEl-Sharkawy, Mabrouk A.
dc.contributor.authorCock, James H.
dc.date.accessioned2014-10-02T08:33:00Z
dc.date.available2014-10-02T08:33:00Z
dc.date.issued1990
dc.identifier.issn1469-4441
dc.identifier.urihttp://hdl.handle.net/10568/43951
dc.description.abstractIn recent studies of cassava at CIAT, net CO2 uptake rates of 20 to 35 ?mol CO2 m?2 s?1 were commonly observed. Cassava photosynthesis has a high optimum temperature (35°C) and a wide plateau (25 to 35°C) corresponding to the temperature range under which cassava is cultivated. Leaf photosynthesis requires high saturation irradiance (1500 ?mol m?2 s?1) and the rates are greatly reduced by leaf-air vapour pressure differences above 1.5 kPa; this reduction is associated with stomatal closure. Cassava leaves have low photorespiration, low CO2 compensation point, high percentage of carbon fixation in C4 acids and a high PEP-carboxylase activity (15 35% of that in maize), but cassava does not have the typical C4-Kranz anatomy. Field measurements of single leaf photosynthesis among a wide range of cultivars grown under rain-fed conditions showed that when light interception was not limiting, there were significant correlations between leaf photosynthesis, total biomass and root yield. This suggests that the use of parental materials with high photosynthetic capacity, in combination with other yield determinants, could be a successful strategy for developing high yielding cultivars. This might be done by exploiting any genetical variations in leaf anatomy and biochemistry that could enhance photosynthesis efficiency and hence productivity.
dc.language.isoen
dc.sourceExperimental Agriculture
dc.subjectMANIHOT ESCULENTA
dc.subjectPHOTOSYNTHESIS
dc.subjectAIR TEMPERATURE
dc.subjectLIGHT REQUIREMENTS
dc.subjectCARBON
dc.subjectBIOCHEMICAL PATHWAYS
dc.subjectLEAVES
dc.subjectCOLOMBIA
dc.subjectMANIHOT ESCULENTA
dc.subjectFOTOSÍNTESIS
dc.subjectTEMPERATURA DEL AIRE
dc.subjectNECESIDADES DE LUZ
dc.subjectCARBONO
dc.subjectVÍA BIOQUÍMICA DEL METABOLISMO
dc.subjectHOJAS
dc.subjectCOLOMBIA
dc.titlePhotosynthesis of cassava (Manihot esculenta)
dc.description.versionPeer-reviewed
dc.typeJournal Article
cg.subject.ciatCASSAVA
cg.subject.ciatPLANT BREEDING
cg.identifier.statusLimited Access
cg.identifier.doihttps://dx.doi.org/10.1017/S0014479700018494
cg.isijournalISI Journal


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