Relationships between physiological traits and productivity of sugarcane in response to water deficit

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dc.contributor.authorSilva, M. De A. [UNESP]
dc.contributor.authorJifon, J. L.
dc.contributor.authorDa Silva, J. A. G.
dc.contributor.authorDos Santos, C. M. [UNESP]
dc.contributor.authorSharma, V.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionTexas A&M Univ Syst
dc.date.accessioned2014-12-03T13:08:59Z
dc.date.available2014-12-03T13:08:59Z
dc.date.issued2014-02-01
dc.description.abstractThe relationships between physiological variables and sugarcane productivity under water deficit conditions were investigated in field studies during 2005 and 2006 in Weslaco, Texas, USA. A total of 78 genotypes and two commercial varieties were studied, one of which was drought-tolerant (TCP93-4245) and the other drought-sensitive (TCP87-3388). All genotypes were subjected to two irrigation regimes: a control well-watered treatment (wet) and a moderate water-deficit stress (dry) treatment for a period of 90 days. Maximum quantum efficiency of photosystem II (F (v)/F (m)), estimated chlorophyll content (SPAD index), leaf temperature (LT), leaf relative water content (RWC) and productivity were measured. The productivity of all genotypes was, on average, affected negatively; however, certain genotypes did not suffer significant reduction. Under water deficit, the productivity of the genotypes was positively and significantly correlated with F (v)/F (m), SPAD index and RWC, while LT had a negative correlation. These findings suggest that genotypes exhibiting traits of high RWC values, high chlorophyll contents and high photosynthetic radiation use efficiency under low moisture availability should be targeted for selection and variety development in programmes aimed at improving sugarcane for drought prone environments.en
dc.description.affiliationUNESP, Sao Paulo State Univ, Coll Agr Sci, BR-18603970 Botucatu, SP, Brazil
dc.description.affiliationTexas A&M Univ Syst, Texas AgriLife Res, Weslaco, TX 78596 USA
dc.description.affiliationUnespUNESP, Sao Paulo State Univ, Coll Agr Sci, BR-18603970 Botucatu, SP, Brazil
dc.format.extent104-118
dc.identifierhttp://dx.doi.org/10.1017/S0021859612000834
dc.identifier.citationJournal Of Agricultural Science. New York: Cambridge Univ Press, v. 152, n. 1, p. 104-118, 2014.
dc.identifier.doi10.1017/S0021859612000834
dc.identifier.issn0021-8596
dc.identifier.urihttp://hdl.handle.net/11449/111797
dc.identifier.wosWOS:000332937700009
dc.language.isoeng
dc.publisherCambridge University Press
dc.relation.ispartofJournal Of Agricultural Science
dc.relation.ispartofjcr1.186
dc.relation.ispartofsjr0,563
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleRelationships between physiological traits and productivity of sugarcane in response to water deficiten
dc.typeArtigo
dcterms.licensehttp://journals.cambridge.org/action/displaySpecialPage?pageId=4676
dcterms.rightsHolderCambridge Univ Press

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