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dc.contributor.authorEl-Sharkawy, Mabrouk A.en_US
dc.contributor.authorCock, James H.en_US
dc.date.accessioned2014-10-02T08:33:00Zen_US
dc.date.available2014-10-02T08:33:00Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/43951en_US
dc.titlePhotosynthesis of cassava (Manihot esculenta)en_US
cg.subject.ciatCASSAVAen_US
cg.subject.ciatPLANT BREEDINGen_US
dcterms.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.en_US
dcterms.accessRightsLimited Accessen_US
dcterms.issued1990en_US
dcterms.languageenen_US
dcterms.subjectmanihot esculentaen_US
dcterms.subjectphotosynthesisen_US
dcterms.subjectair temperatureen_US
dcterms.subjectlight requirementsen_US
dcterms.subjectcarbonen_US
dcterms.subjectbiochemical pathwaysen_US
dcterms.subjectleavesen_US
dcterms.subjectmanihot esculentaen_US
dcterms.subjectfotosíntesisen_US
dcterms.subjecttemperatura del aireen_US
dcterms.subjectnecesidades de luzen_US
dcterms.subjectcarbonoen_US
dcterms.subjectvía bioquímica del metabolismoen_US
dcterms.subjecthojasen_US
dcterms.typeJournal Articleen_US
cg.identifier.doihttps://doi.org/10.1017/S0014479700018494en_US
cg.isijournalISI Journalen_US
cg.reviewStatusPeer Reviewen_US
cg.journalExperimental Agricultureen_US
cg.issn1469-4441en_US


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