Crop Physiology (Second Edition)
Chapter 10 - Senescence and crop performance
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Selection for yield shifted the proportion of oil and protein in favor of low-energy seed fractions in soybean
2022, Field Crops ResearchCitation Excerpt :Biological N fixation is substantially more expensive, requiring a greater amount of carbon (C) assimilates and energy in exchange for reduced N compounds (Patterson and LaRue, 1983), and is often inhibited if sufficient mineral N is present in the soil (Voisin et al., 2003). Protein synthesis in seed depends on N stored in vegetative structures mobilized from leaf senescence (Ortez et al., 2019; Thomas and Ougham, 2015). Synthesis of carbohydrates and lipids rely mostly on current photosynthesis, and therefore, on the integrity of the photosynthetic system (Yamagata et al., 1987).
Delayed maize leaf senescence increases the land equivalent ratio of maize soybean relay intercropping system
2020, European Journal of AgronomyCitation Excerpt :However, high maize seed yield could be obtained by extending the photosynthetic duration and enhancing the harvest index; these two indices are directly associated with the senescence of leaves (Bänziger et al., 2002). The process of leaf senescence in crop plants has been regulated by several environmental factors (Thomas and Ougham, 2015). For instance, changing light conditions influence the light intensity and quality (Raza et al., 2019a), which ultimately affects the leaf senescence in maize plants (Raza et al., 2019b).
Maize
2020, Crop Physiology Case Histories for Major CropsField pea
2020, Crop Physiology Case Histories for Major CropsStay-green associates with low water soluble carbohydrates at flowering in oat
2019, Field Crops ResearchCitation Excerpt :Crop yield often, but not always, correlates positively with maintenance of green canopy; hence the interest in understanding the traits underlying leaf senescence, which have been dissected from molecular to crop level (Jordan et al., 2012; Gregersen et al., 2013; Thomas and Ougham, 2015).
Nitrogen supply and sink demand modulate the patterns of leaf senescence in maize
2018, Field Crops ResearchCitation Excerpt :High yield potential in maize has been achieved through the extension of photosynthetic duration and increased harvest index, two traits that are related with leaf senescence (Bänziger et al., 2002; Wu et al., 2012). Genetic and environmental factors trigger and regulate senescence (Gregersen et al., 2013; Thomas and Ougham, 2015). There is considerable genetic variation in the patterns of senescence in maize (Gregersen et al., 2013).