dc.creatorLacasa, Josefina
dc.creatorCiampitti, Ignacio Antonio
dc.creatorAmás, Juan Ignacio
dc.creatorCurin, Facundo
dc.creatorLuque, Sergio Fernando
dc.creatorOtegui, Maria Elena
dc.date.accessioned2022-05-19T18:48:38Z
dc.date.accessioned2022-10-15T03:32:05Z
dc.date.available2022-05-19T18:48:38Z
dc.date.available2022-10-15T03:32:05Z
dc.date.created2022-05-19T18:48:38Z
dc.date.issued2021-12
dc.identifierLacasa, Josefina; Ciampitti, Ignacio Antonio; Amás, Juan Ignacio; Curin, Facundo; Luque, Sergio Fernando; et al.; Breeding effects on canopy light attenuation in maize: A retrospective and prospective analysis; Oxford University Press; Journal of Experimental Botany; 73; 5; 12-2021; 1301-1311
dc.identifier0022-0957
dc.identifierhttp://hdl.handle.net/11336/157836
dc.identifier1460-2431
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4340418
dc.description.abstractThe light attenuation process within a plant canopy defines energy capture and vertical distribution of light and nitrogen (N). The vertical light distribution can be quantitatively described with the extinction coefficient (k), which associates the fraction of intercepted photosynthetically active radiation (fPARi) with the leaf area index (LAI). Lower values of k correspond to upright leaves and homogeneous vertical light distribution, increasing radiation use efficiency (RUE). Yield gains in maize (Zea mays L.) were accompanied by increases in optimum plant density and leaf erectness. Thus, the yield-driven breeding programs and management changes, such as reduced row spacing, selected a more erect leaf habit under different maize production systems (e.g., China and the USA). In this study, data from Argentina revealed that k decreased at a rate of 1.1% year–1 since 1989, regardless of plant density and in agreement with Chinese reports (1.0% year–1 since 1981). A reliable assessment of changes in k over time is critical for predicting (i) modifications in resource use efficiency (e.g. radiation, water, and N), improving estimations derived from crop simulation models; (ii) differences in productivity caused by management practices; and (iii) limitations to further exploit this trait with breeding.
dc.languageeng
dc.publisherOxford University Press
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/jxb/advance-article/doi/10.1093/jxb/erab503/6481165
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/jxb/erab503
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectPHOTOSYNTHESIS
dc.subjectCANOPY DESIGN
dc.subjectLIGHT INTERCEPTION
dc.subjectLIGHT EXTINCTION COEFFICIENT
dc.titleBreeding effects on canopy light attenuation in maize: A retrospective and prospective analysis
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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