Physiological traits associated with reductions in grain number in wheat and barley under waterlogging
- 128 Downloads
Negative effects of waterlogging on wheat and barley yield are expressed mainly through reductions in grain number per plant. Physiological traits associated with reductions in grain number of wheat and barley plants waterlogged at different growth stages during preanthesis were evaluated.
Two pot experiments were carried out under contrasting environments, where wheat and barley plants were exposed to waterlogging at four different ontogenic stages, from emergence to anthesis. Physiological traits associated with grain number determination were measured at anthesis and at physiological maturity.
Waterlogging occurring during the spike growth period significantly reduced grain number per plant up to 70% in wheat and 60% in barley. Reductions in grain number per plant in wheat were mainly related to decreases in grain number per spike, while in barley grain number reductions were related to decreases in the number of spikes. In both species waterlogging produced spike growth reductions that were associated with reductions in the number of fertile florets per spike, without effects on fruiting efficiency.
The effect of waterlogging on grain number per plant differed between wheat and barley. Waterlogging reduced grain establishment in wheat by affecting the growth capacity of spikes and, consequently, reducing the number of fertile florets per spike. In barley, the main effect of waterlogging was through reductions in the number of spikes per plant, without significant changes in grain number per spike. These differences between species open ways to analyze the impact of different management practices (i.e. nitrogen fertilization, plant population) as alternative to mitigate the negative effect of waterlogging on grain yield.
KeywordsFertile florets Flooding Fruiting efficiency Grain number Hordeum vulgare L Triticum aestivum L
This work was financed by projects from the National Agency for Science Promotion (ANPCyT, PICT 1245) and the University of Buenos Aires (UBACYT 20020120100258BA). R.P. de San Celedonio has a scholarship from the National Council for Scientific Research (CONICET).
- Armstrong W (1979) Aeration in higher plants. In: Woolhouse HW (ed) Advances in Botanical Research, vol 7. Academic Press Inc., London, pp 225–332Google Scholar
- de San Celedonio RP, Micheloud JR, Abeledo GL, Miralles DJ, Slafer GA (2014b) Riesgo de anegamiento en trigo (Tritucum aestivum L.) para distintas localidades de la región triguera argentina. Ci Suelo 32:233–246Google Scholar
- Di Rienzo JA, Casanoves F, Balzarini MG, Gonzalez L, Tablada M, Robledo CW (2011) InfoStat Profesional. FCA, Universidad Nacional de Córdoba, Córdoba, Argentina, Grupo InfoStatGoogle Scholar
- Ferrante A, Savin R, Slafer GA (2010) Floret development of durum wheat in response to nitrogen availability. J Exp Bot 61:4351–4359Google Scholar
- González FG, Miralles DJ Slafer GA (2011) Wheat floret survival as related to pre-anthesis spike growth. J Exp Bot 62:4889–4901Google Scholar
- Hoffman E and Viega L (2011) Caracterización preliminar de cultivares de trigo y cebada por su comportamiento al estrés hídrico. In: Castro AJ, Hoffman E, Viega L (ed) Limitaciones para la productividad de trigo y cebada. CYTED, Montevideo, pp 53–57Google Scholar
- Miralles DJ, Richards RA, Slafer GA (2000) Duration of the stem elongation period influences the number of fertile florets in wheat and barley. Aust J Plant Physiol 27:931–940Google Scholar
- Ponnamperuma FN (1984) Effects of flooding on soils. In: Koslowski TT (ed) Flooding and plant growth. Academic Press Inc, Orlando, pp 10–42Google Scholar
- Sayre K, Van Ginkel M, Rajaram S, Ortiz-Monasterio I (1994) Tolerance to waterlogging losses in spring bread wheat: effect of time of onset on expression. Annual Wheat Newsletter 40:165–171Google Scholar
- Setter TL, Burguess P, Waters I, Kuo J (1999) Genetic diversity of barley and wheat for waterlogging tolerance in Western Australia. Proceeding of the 9th Australian Barley Technical Symposium, MelbourneGoogle Scholar