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- W1551554927 abstract "Senescence is an age-dependent process at the cellular, tissue, organ or organism level, leading to death at the end of the life span (Nooden 1988). Annual plants as grain and oil crops undergo a visual process towards the end of the reproductive stage that is accompanied by nutrient remobilization from leaf to developing seeds (Buchanan-Wollaston et al. 2003). The final stage of this process is leaf death but this is actively delayed until all nutrients have been removed and recycle through the process of developmental senescence. It have been documented that a delay in leaf senescence has an important impact on grain yield trough the maintenance of the photosynthetic leaf area during the reproductive stage in different crops (Ewing & Claverie 2000), including sunflower (Sadras et al. 2000; De la Vega et al. 2011). The potential yields of sunflower crop are far from the real ones in all Argentina productive regions. In Balcarce, for example, while the potential yields are estimated in 5,000 kg.ha-1, those obtained by the best producers only reach 3,000 kg.ha-1, and the average in the region ranges in 1,800 kg.ha-1 (Dosio & Aguirrezabal 2004). These differences could possibly be due to the inability of current hybrids to keep their green leaf area for long periods, which would allow greater use of the incident radiation during the grain filling period which plays an important role in determining the yield and oil concentration in sunflower (Dosio et al. 2000; Aguirrezabal et al. 2003)." @default.
- W1551554927 created "2016-06-24" @default.
- W1551554927 creator A5052332581 @default.
- W1551554927 creator A5073142541 @default.
- W1551554927 creator A5074882856 @default.
- W1551554927 creator A5088303246 @default.
- W1551554927 date "2012-02-29" @default.
- W1551554927 modified "2023-09-26" @default.
- W1551554927 title "Functional Approaches to Study Leaf Senescence in Sunflower" @default.
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