Maize radiation use-efficiency response to optimally distributed foliar-nitrogen-content depends on canopy leaf-area index

Bonelli, Lucas E.; Andrade, Fernando H.

doi:10.1016/j.fcr.2019.107557

Cited by 32 publications

(24 citation statements)

References 44 publications

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“…The photosynthetic capacity of a crop depends on its ability to capture sunlight and its efficiency in carbon assimilation using the captured radiation energy (Bonelli & Andrade, 2020). Light absorption is an important factor in determining crop yield.…”

Section: Discussionmentioning

confidence: 99%

Improving the yield potential in maize by constructing the ideal plant type and optimizing the maize canopy structure

Zhang

Liu

et al. 2021

Food and Energy Security

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Section: Discussionmentioning

confidence: 99%

Improving the yield potential in maize by constructing the ideal plant type and optimizing the maize canopy structure

Zhang

Liu

et al. 2021

Food and Energy Security

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“…This makes the photosynthetic light harvesting efficiency of Chls highly dependent on their localization within leaves and canopies. Consistently, within natural canopies(Bauerle et al, 2020) and crops(Bonelli & Andrade, 2020), deep leaf layers lie below the light compensation point and limit biomass production(Dall'Osto et al, 2005;Pérez-Bueno et al, 2008). Such light gradient-dependent limitation of photosynthetic productivity is a problem for agriculture and algal culture in photobioreactors(Dall'Osto et al, 2019).…”

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confidence: 99%

Plants with less chlorophyll: A global change perspective

Genesio

Bassi

Miglietta

2020

Global Change Biology

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The necessary reduction of greenhouse gas (GHG) emissions may lead in the future to an increase in solar irradiance (solar brightening). Anthropogenic aerosols (and their precursors) that cause solar dimming are in fact often co‐emitted with GHGs. While the reduction of GHG emissions is expected to slow down the ongoing increase in the greenhouse effect, an increased surface irradiance due to reduced atmospheric aerosol load might occur in the most populated areas of the earth. Increased irradiance may lead to air warming, favour the occurrence of heatwaves and increase the evaporative demand of the atmosphere. This is why effective and sustainable solar radiation management strategies to reflect more light back to space should be designed, tested and implemented together with GHG emission mitigation. Here we propose that new plants (crops, orchards and forests) with low‐chlorophyll (Chl) content may provide a realistic, sustainable and relatively simple solution to increase surface reflectance of large geographical areas via changes in surface albedo. This may finally offset all or part of the expected local solar brightening. While high‐Chl content provides substantial competitive advantages to plants growing in their natural environment, new plants with low‐Chl content may be successfully used in agriculture and silviculture and be as productive as the green wildtypes (or even more). The most appropriate strategies to obtain highly productive and highly reflective plants are discussed in this paper and their mitigation potential is examined together with the challenges associated with their introduction in agriculture.

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“…SPAD readings reflect the leaf growth status and can be used to quantitatively study the leaf chlorophyll status at different plant densities (Samborski et al ., 2009; Yan et al ., 2016; Yuan et al ., 2016 a ). Plants under crowding stress may have a low chlorophyll content and nitrogen concentration in the leaf blades (Bonelli and Andrade, 2020). Additionally, SPAD readings have previously been used to characterize chlorophyll content responses to nitrogen fertilization, with the ultimate goal of developing strategies such as late N fertilization (Fernandez et al ., 2020) to manage crop nutrition and match N supply with crop demand during the growing season (Lemaire et al ., 2008; Yang et al ., 2014 b ).…”

Section: Introductionmentioning

confidence: 99%

Effects of nitrogen application rates on the spatio-temporal variation of leaf SPAD readings on the maize canopy

Ming

Liu

et al. 2022

J. Agric. Sci.

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The spatio-temporal variation of leaf chlorophyll content is an important crop phenotypic trait that is of great significance for evaluating crop productivity. This study used a soil-plant analysis development (SPAD) chlorophyll meter for non-destructive monitoring of leaf chlorophyll dynamics to characterize the patterns of spatio-temporal variation in the nutritional status of maize (Zea mays L.) leaves under three nitrogen treatments in two cultivars. The results showed that nitrogen levels could affect the maximum leaf SPAD reading (SPADmax) and the duration of high SPAD reading. A rational model was used to measure the changes in SPAD readings over time in single leaves. This model was suitable for predicting the dynamics of the nutrient status for each leaf position under different nitrogen treatments, and model parameter values were position dependent. SPADmax at each leaf decreased with the reduction of nitrogen supply. Leaves at different positions in both cultivars responded differently to higher nitrogen rates. Lower leaves (8th–10th positions) were more sensitive than the other leaves in response to nitrogen. Monitoring the SPAD reading dynamic of lower leaves could accurately characterize and assess the nitrogen supply in plants. The lower leaves in nitrogen-deficient plants had a shorter duration of high SPAD readings compared to nitrogen-sufficient plants; this physiological mechanism should be studied further. In summary, the spatio-temporal variation of plant nitrogen status in maize was analysed to determine critical leaf positions for potentially assisting in the identification of appropriate agronomic management practices, such as the adjustment of nitrogen rates in late fertilization.

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Maize radiation use-efficiency response to optimally distributed foliar-nitrogen-content depends on canopy leaf-area index

Cited by 32 publications

References 44 publications

Improving the yield potential in maize by constructing the ideal plant type and optimizing the maize canopy structure

Improving the yield potential in maize by constructing the ideal plant type and optimizing the maize canopy structure

Plants with less chlorophyll: A global change perspective

Effects of nitrogen application rates on the spatio-temporal variation of leaf SPAD readings on the maize canopy

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