Floret development and survival in wheat plants exposed to contrasting photoperiod and radiation environments during stem elongation

Functional Plant Biology : FPB
Fernanda G GonzálezDaniel J Miralles

Abstract

Wheat breeding has improved yield potential increasing floret survival through higher dry matter partitioning to the spikes during the stem elongation phase (from terminal spikelet initiation to anthesis). We studied survival of floret primodia in different spikelet positions along the spike in relation to dynamics of spike growth, when dynamics of dry matter partitioning to the spike was altered by photoperiod and shading treatments applied during the stem elongation phase. The cultivar Buck Manantial was exposed to (1) NP+0 un-shaded (natural photoperiod and incoming radiation of the growing season), (2) NP+0 shaded (natural photoperiod but only 33% of the incoming radiation), and (3) NP+6 un-shaded (natural photoperiod extended 6 h and natural incoming radiation). Floret survival increased, depending on spikelet position, 1.1-2.5 fold under un-shaded v. shaded treatments (both under NP+0), and 1.3-1.8 fold under NP+0 v. NP+6 treatments (both un-shaded), without any impact of treatments on the total number of initiated floret primordia. The fate of the floret primordia and its final stage at anthesis were associated with duration of floret development within the stem elongation phase (R2 = 82%, P<0.0001). Florets may be class...Continue Reading

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Citations

Apr 1, 2014·Seminars in Cardiothoracic and Vascular Anesthesia·Jayanta MukherjiSteven B Edelstein
Jun 28, 2011·Journal of Experimental Botany·Fernanda G GonzálezGustavo A Slafer
Aug 7, 2012·Plant, Cell & Environment·Matthew ReynoldsGustavo Slafer
Apr 14, 2009·Journal of Experimental Botany·Matthew ReynoldsWilliam J Angus
May 15, 2013·Journal of Experimental Botany·Ariel FerranteGustavo A Slafer
Dec 27, 2019·Journal of Experimental Botany·Paula PrietoGustavo A Slafer
Aug 11, 2010·Journal of Experimental Botany·Ariel FerranteGustavo A Slafer
Jun 13, 2008·The Plant Journal : for Cell and Molecular Biology·Hernán O GhiglioneJorge J Casal
Dec 24, 2018·Journal of Experimental Botany·Thomas I Pérez-GianmarcoFernanda G González
Mar 1, 2021·Journal of Experimental Botany·José L ArausRubén Vicente

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