Vertical distributions of chlorophyll and nitrogen and their associations with photosynthesis under drought and rewatering regimes in a maize field

Li, Yibo; Song, He; Zhou, Li; Xu, Zhenzhu; Zhou, Guangsheng

doi:10.1016/j.agrformet.2019.03.026

Cited by 62 publications

(27 citation statements)

References 91 publications

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“…Variations in photosynthetic parameters are also related to fertilizer types and its application rates. Previous studies showed that the application of 100% NPK triggered earlier onset of leaf senescence because of the decline of post-anthesis photosynthesis [19]. However, NPK fertilizers incorporated into poultry manure was shown to increase photosynthetic activity [20].…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Manure into Ridge and Furrow Planting System Boosts Yields of Maize by Optimizing Soil Moisture and Improving Photosynthesis

et al. 2019

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A sustainable management strategy of soil fertility and cropping system is critical to guaranteeing food security. However, little is known about the effects of soil amendment strategies on crop growth via regulating soil moisture and photosynthesis in a ridge and furrow cropping system. Here, field experiments were carried out in 2017 and 2018 in semi-arid areas of Loess Plateau, northwest China to investigate the effects of integrated use of ridge and furrow planting and manure amendment on grain yields of maize. Four treatments were designed: CK (flat planting with 100% chemical fertilizer), RFC (ridge and furrow planting with 100% chemical fertilizer), RFR (ridge and furrow planting with 100% control-released fertilizer), and RFM (ridge and furrow planting with 50% manure fertilizer + 50% N fertilizer). On average, RFM increased photosynthetic rates (Pn) by 74%, followed by RFR by 47%, and RFC by 26%, compared to CK. Also, stomatal conductance (Cd), transpiration rates (Tr), and intercellular CO2 concentration (Ci) were highest with RFM, followed by RFR and RFC. Averaged across the two years, RFM conserved 10% more soil water storage (SWS) than CK did at harvest, followed by RFR with an increment by 8%. However, RFC consumed more soil water than CK did, with its ETc 8% higher than CK. Consequently, spring maize treated with RFM suffered less drought stress, especially in 2017 when precipitation was insufficient. On average, grain yields and water use efficiency of RFM were increased by 18% and 27%, compared to CK. Structural equation modeling analysis showed that there existed significant positive correlation between SWS in top layers and grain yields, while SWS in deep layers had negative effects on grain yields. In conclusion, the incorporation of manure into ridge and furrow planting system can be an efficient agronomic practice to improve plant photosynthesis, optimize soil moisture, and boost grain yields in semi-arid areas of Loess Plateau, northwest China.

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Section: Introductionmentioning

confidence: 99%

Incorporation of Manure into Ridge and Furrow Planting System Boosts Yields of Maize by Optimizing Soil Moisture and Improving Photosynthesis

et al. 2019

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“…Previous research efforts have been devoted to phenotype a variety of key plant traits, such as the contents of chlorophyll (Chl) and other photosynthetic pigments, nitrogen, and also water, on a laboratory scale using optical sensors. However, these studies mainly focused on the canopy level without considering the spatiotemporal heterogeneity within the leaf and/or canopy ( Hikosaka, 2016 ; Li et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

“…Investigations into the vertical distribution of leaf Chl showed different results in several crops. Maize canopies exhibited a bell-shaped curve with the highest Chl content positioned near the intermediate layer leaves during the reproductive phase ( Ciganda et al, 2008 ; Winterhalter et al, 2012 ; Li et al, 2019 ). While winter wheat showed an increasing trend from the bottom to top with the highest Chl content located at the flag leaf ( Huang et al, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Heterogeneity of Chlorophyll Content and Fluorescence Response Within Rice (Oryza sativa L.) Canopies Under Different Nitrogen Treatments

et al. 2021

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Accurate acquisition of plant phenotypic information has raised long-standing concerns in support of crop breeding programs. Different methods have been developed for high throughput plant phenotyping, while they mainly focused on the canopy level without considering the spatiotemporal heterogeneity at different canopy layers and growth stages. This study aims to phenotype spatiotemporal heterogeneity of chlorophyll (Chl) content and fluorescence response within rice leaves and canopies. Multipoint Chl content and high time-resolved Chl a fluorescence (ChlF) transient (OJIP transient) of rice plants were measured at different nitrogen levels and growth stages. Results showed that the Chl content within the upper leaves exhibited an increasing trend from the basal to the top portions but a decreasing pattern within the lower leaves at the most growth stages. Leaf Chl content within the rice canopy was higher in the lower leaves in the vegetative phase, while from the initial heading stage the pattern gradually reversed with the highest Chl content appearing in the upper leaves. Nitrogen supply mainly affects the occurrence time of the reverse vertical pattern. This could be the result of different nutritional demands of leaves transforming from sinks to sources, and it was further confirmed by the fall of the JI phase of OJIP transient in the vegetative phase and the rise in the reproductive phase. We further deduced that the vertical distribution of Chl content could have a defined pattern at a specific growth stage. Furthermore, the reduction of end acceptors at photosystem I (PSI) electron acceptor side per cross section (RE0/CS) was found to be a potential sensitive predictor for identifying the vertical heterogeneity of leaf Chl content. These findings provide prior knowledge on the vertical profiles of crop physiological traits, which explore the opportunity to develop more efficient plant phenotyping tools for crop breeding.

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“…Drought has been an important factor in the growth of maize, the most widely grown crop in the world. Water deficit causes unstable and low yields in many maize production areas in the world, seriously hampering plant growth and causing 25-30% reductions in grain yield in some vulnerable regions (Sharp et al, 2003;Ben-Ari et al, 2016;Beyene et al, 2016;Li et al, 2019;Kimm et al, 2020). For instance, the U.S.…”

Section: Introductionmentioning

confidence: 99%

“…The field experimental design was as detailed previously(Li et al, 2019). In brief,1 an electric-powered waterproof shelter (4 m in height) set up in the maize field was 1 used to establish the various precipitation regimes that we desired (details in Li et al, 1 2019).…”

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confidence: 99%

Photosynthetic resistance and resilience under drought and rewatering in maize plants

Miao

Song

et al. 2020

Preprint

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Abnormally altered precipitation patterns induced by climate change have profound global effects on crop production. However, the plant functional responses to various precipitation regimes remain unclear. Here, greenhouse and field experiments were conducted to determine how maize plant functional traits respond to drought, flooding, and rewatering. Drought and flooding hampered photosynthetic capacity, particularly when severe and/or prolonged. Most photosynthetic traits recovered after rewatering, with few compensatory responses. Rewatering often elicited high photosynthetic resilience in plants exposed to severe drought at the end of plant development, with the response strongly depending on the drought severity/duration and plant growth stage. The associations of chlorophyll concentrations with photosynthetically functional activities were stronger during post-tasselling than pre-tasselling, implying an involvement of leaf age/senescence in responses to episodic drought and subsequent rewatering. Coordinated changes in chlorophyll content, gas exchange, fluorescence parameters (PSII quantum efficiency and photochemical/non-photochemical radiative energy dissipation) possibly contributed to the enhanced drought resistance and resilience and suggested a possible regulative trade-off. These findings provide fundamental insights into how plants regulate their functional traits to deal with sporadic alterations in precipitation. Breeding and management of plants with high resistance and resilience traits could help crop production under future climate change.

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Vertical distributions of chlorophyll and nitrogen and their associations with photosynthesis under drought and rewatering regimes in a maize field

Cited by 62 publications

References 91 publications

Incorporation of Manure into Ridge and Furrow Planting System Boosts Yields of Maize by Optimizing Soil Moisture and Improving Photosynthesis

Incorporation of Manure into Ridge and Furrow Planting System Boosts Yields of Maize by Optimizing Soil Moisture and Improving Photosynthesis

Spatiotemporal Heterogeneity of Chlorophyll Content and Fluorescence Response Within Rice (Oryza sativa L.) Canopies Under Different Nitrogen Treatments

Photosynthetic resistance and resilience under drought and rewatering in maize plants

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