Inter - plant variability in maize crops grown under contrasting N X stand density combinations links between development, growth and kernel set
Genotypic differences in the response of maize kernel number per plant to ear growth rate around silking, caused by contrasting N availability, have been attributed to the effects of this element on reproductive efficiency [i.e. kernel set per unit of ear growth rate]. The objective of current resea...
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| Otros Autores: | , |
| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2012Rossini.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 008 | 181208t2012 |||||o|||||00||||eng d | ||
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| 022 | |a 0378-4290 | ||
| 024 | |a 10.1016/j.fcr.2012.03.010 | ||
| 040 | |a AR-BaUFA |c AR-BaUFA | ||
| 100 | 1 | |9 22317 |a Rossini, María de los Angeles | |
| 245 | 0 | 0 | |a Inter - plant variability in maize crops grown under contrasting N X stand density combinations |b links between development, growth and kernel set |
| 520 | |a Genotypic differences in the response of maize kernel number per plant to ear growth rate around silking, caused by contrasting N availability, have been attributed to the effects of this element on reproductive efficiency [i.e. kernel set per unit of ear growth rate]. The objective of current research was to assess if reduced reproductive efficiency of some genotypes under N stress is due to the effect of this nutrient on the number of completely developed florets per ear, the number of exposed silks per ear, and/or abortion of pollinated florets. Two field experiments were conducted with two hybrids previously characterized by their contrasting reproductive efficiency [high for AX820 and low for AX877] under N stress, two stand densities [9 and 12plm-2] and two levels of added N [0 and 200kgNha-1]. We established links among plant and ear growth rates, reproductive traits and kernel number per plant. Reduced reproductive efficiency [quantified as kernel number per plant per unit of spikelet growth rate around silking] of both hybrids under N deficiency was mainly due to an enhanced abortion of pollinated florets of the most suppressed plants of the stand [dominated individuals]. This response did not appear to be the result of low spikelet growth rate around silking, but a direct control of N on sink capacity of fertilized ovaries for assimilates allocation. | ||
| 650 | |2 Agrovoc |9 26 | ||
| 653 | 0 | |a EAR DEVELOPMENT | |
| 653 | 0 | |a MAIZE | |
| 653 | 0 | |a N STRESS | |
| 653 | 0 | |a PLANT GROWTH | |
| 653 | 0 | |a REPRODUCTIVE EFFICIENCY | |
| 653 | 0 | |a ZEA MAYS L. | |
| 653 | 0 | |a BIOLOGICAL DEVELOPMENT | |
| 653 | 0 | |a ENVIRONMENTAL CONDITIONS | |
| 653 | 0 | |a EXPERIMENTAL STUDY | |
| 653 | 0 | |a GENOTYPE | |
| 653 | 0 | |a GROWTH RATE | |
| 653 | 0 | |a GROWTH RESPONSE | |
| 653 | 0 | |a INTRAPOPULATION VARIATION | |
| 653 | 0 | |a NITROGEN | |
| 653 | 0 | |a NUTRIENT AVAILABILITY | |
| 653 | 0 | |a REPRODUCTIVE POTENTIAL | |
| 653 | 0 | |a ZEA MAYS | |
| 700 | 1 | |9 7271 |a Maddonni, Gustavo Angel | |
| 700 | 1 | |9 5930 |a Otegui, María Elena | |
| 773 | |t Field Crops Research |g Vol. 33 (2012), p.90-100 | ||
| 856 | |u http://ri.agro.uba.ar/files/intranet/articulo/2012Rossini.pdf |i En reservorio |q application/pdf |f 2012Rossini |x MIGRADOS2018 | ||
| 856 | |u http://www.elsevier.com/ |x MIGRADOS2018 |z LINK AL EDITOR | ||
| 942 | 0 | 0 | |c ARTICULO |
| 942 | 0 | 0 | |c ENLINEA |
| 976 | |a AAG | ||