2020
DOI: 10.1111/gcb.15453
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The impact of global dimming on crop yields is determined by the source–sink imbalance of carbon during grain filling

Abstract: Global dimming reduces incident global radiation but increases the fraction of diffuse radiation, and thus affects crop yields; however, the underlying mechanisms of such an effect have not been revealed. We hypothesized that crop source–sink imbalance of either carbon (C) or nitrogen (N) during grain filling is a key factor underlying the effect of global dimming on yields. We presented a practical framework to assess both C and N source–sink relationships, using data of biomass and N accumulation from period… Show more

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Cited by 63 publications
(33 citation statements)
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References 105 publications
(125 reference statements)
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“…This means that the increased leaf respiration under drought stress could be due to drought priming. Moreover, in these early studies, drought treatment was applied at the seedling or sapling stage (Bartoli et al, 2005; Gauthier et al, 2014; Zagdańska, 1995), instead of at the postanthesis stage in which assimilated carbohydrates and nitrogenous compounds, those related to substrate supply and respiratory capacity (Tjoelker et al, 1999), are being translocated from source (leaves) to sink (grains) (Shao et al, 2021), and energy demand for sucrose synthesis and/or phloem loading is in decline (Atkin & Macherel, 2009). The above may explain the difference between their results and our experiments.…”
Section: Discussionmentioning
confidence: 99%
“…This means that the increased leaf respiration under drought stress could be due to drought priming. Moreover, in these early studies, drought treatment was applied at the seedling or sapling stage (Bartoli et al, 2005; Gauthier et al, 2014; Zagdańska, 1995), instead of at the postanthesis stage in which assimilated carbohydrates and nitrogenous compounds, those related to substrate supply and respiratory capacity (Tjoelker et al, 1999), are being translocated from source (leaves) to sink (grains) (Shao et al, 2021), and energy demand for sucrose synthesis and/or phloem loading is in decline (Atkin & Macherel, 2009). The above may explain the difference between their results and our experiments.…”
Section: Discussionmentioning
confidence: 99%
“…Here we focus on stay-green achieved by optimizing nitrogen uptake and allocation to grains. Grain nitrogen comes partly from de novo uptake by roots, but also largely from remobilization of nitrogen from vegetative green tissues ( Gaju et al , 2014 ; Shao et al , 2021 ), especially from photosynthetic enzymes ( Mu et al , 2018 ). Remobilization results in leaf senescence ( Sinclair and de Wit, 1976 ).…”
Section: Natural Variation Of Photosynthetic Parametersmentioning
confidence: 99%
“…Regarding fresh tomato production, The Netherland's greenhouses have an average yield of 65-70 kg•m −2 with peak of 80-85 kg•m −2 , while in Italy, the average yield is around 20-25 kg•m −2 , and in Spain, it is 16-18 kg•m −2 [80]. Light is often the main environmental factor reducing crop yield in the Mediterranean basin; other phenomena such as "global dimming" accentuate light deficiency in the dark season [81].…”
Section: Greenhouse Technology In Different Climatic Regionsmentioning
confidence: 99%