Silicon nutrition increases grain yield, which, in turn, exerts a feed-forward stimulation of photosynthetic rates via enhanced mesophyll conductance and alters primary metabolism in rice

dc.creatorDetmann, K.C.
dc.creatorAraújo, W.L.
dc.creatorMartins, S.C.
dc.creatorSanglard, L.M.
dc.creatorReis, J.V.
dc.creatorDetmann, E.
dc.creatorRodrigues, F.Á.
dc.creatorNunes-Nesi, A.
dc.creatorFernie, A.R.
dc.creatorDaMatta, F.M.
dc.date2017-12-13T15:11:39Z
dc.date2017-12-13T15:11:39Z
dc.date2012-09-19
dc.date.accessioned2023-09-27T21:51:37Z
dc.date.available2023-09-27T21:51:37Z
dc.identifier1469-8137
dc.identifierhttp://dx.doi.org/10.1111/j.1469-8137.2012.04299.x
dc.identifierhttp://www.locus.ufv.br/handle/123456789/14919
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8967203
dc.descriptionSilicon (Si) is not considered to be an essential element for higher plants and is believed to have no effect on primary metabolism in unstressed plants. In rice (Oryza sativa), Si nutrition improves grain production; however, no attempt has been made to elucidate the physiological mechanisms underlying such responses. Here, we assessed crop yield and combined advanced gas exchange analysis with carbon isotope labelling and metabolic profiling to measure the effects of Si nutrition on rice photosynthesis, together with the associated metabolic changes, by comparing wild-type rice with the low-Si rice mutant lsi1 under unstressed conditions. Si improved the harvest index, paralleling an increase in nitrogen use efficiency. Higher crop yields associated with Si nutrition exerted a feed-forward effect on photosynthesis which was fundamentally associated with increased mesophyll conductance. By contrast, Si nutrition did not affect photosynthetic gas exchange during the vegetative growth phase or in de-grained plants. In addition, Si nutrition altered primary metabolism by stimulating amino acid remobilization. Our results indicate a stimulation of the source capacity, coupled with increased sink demand, in Si-treated plants; therefore, we identify Si nutrition as an important target in attempts to improve the agronomic yield of rice.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherNew Phytologist
dc.relation196(3), p. 752-62, Nov. 2012
dc.rightsOpen Access
dc.subjectMesophyll conductance
dc.subjectMetabolic profiling
dc.subjectPhotosynthesis
dc.subjectRice (Oryza sativa)
dc.subjectSilicon (Si)
dc.subjectSource–sink manipulation
dc.titleSilicon nutrition increases grain yield, which, in turn, exerts a feed-forward stimulation of photosynthetic rates via enhanced mesophyll conductance and alters primary metabolism in rice
dc.typeArtigo


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