Photosynthetic Acclimation and Growth Responses to Elevated CO2 Associate with Leaf Nitrogen and Phosphorus Concentrations in Mulberry (Morus multicaulis Perr.)

Shi, Shun; Xu, Xiao; Dong, Xingshui; Xu, Chenyang; Qiu, Yuling; He, Xinhua

doi:10.3390/f12060660

Cited by 4 publications

(2 citation statements)

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“…A second hypothesis is related to nutrient dilution/acquisition, mainly nitrogen (N) and phosphorus (P), as a consequence of the rapid growth and/or allocation in sink tissues [ 50 , 51 , 52 ]. Rubisco is the most abundant protein in plants; then, a strong N-sink and reductions in its amount can be a common symptom of N deficiency and/or remobilization to other pathways, directly decreasing CO 2 assimilation.…”

Section: Woody Plant Growth and Development Under Elevated Comentioning

confidence: 99%

Physiological and Molecular Responses of Woody Plants Exposed to Future Atmospheric CO2 Levels under Abiotic Stresses

Lobo

Catarino

Silva³

et al. 2022

Plants

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Climate change is mainly driven by the accumulation of carbon dioxide (CO2) in the atmosphere in the last century. Plant growth is constantly challenged by environmental fluctuations including heat waves, severe drought and salinity, along with ozone accumulation in the atmosphere. Food security is at risk in an increasing world population, and it is necessary to face the current and the expected effects of global warming. The effects of the predicted environment scenario of elevated CO2 concentration (e[CO2]) and more severe abiotic stresses have been scarcely investigated in woody plants, and an integrated view involving physiological, biochemical and molecular data is missing. This review highlights the effects of elevated CO2 in the metabolism of woody plants and the main findings of its interaction with abiotic stresses, including a molecular point of view, aiming to improve the understanding of how woody plants will face the predicted environmental conditions. Overall, e[CO2] stimulates photosynthesis and growth and attenuates mild to moderate abiotic stress in woody plants if root growth and nutrients are not limited. Moreover, e[CO2] does not induce acclimation in most tree species. Some high-throughput analyses involving omics techniques were conducted to better understand how these processes are regulated. Finally, knowledge gaps in the understanding of how the predicted climate condition will affect woody plant metabolism were identified, with the aim of improving the growth and production of this plant species.

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Section: Woody Plant Growth and Development Under Elevated Comentioning

confidence: 99%

Physiological and Molecular Responses of Woody Plants Exposed to Future Atmospheric CO2 Levels under Abiotic Stresses

Lobo

Catarino

Silva³

et al. 2022

Plants

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“…Other concepts explaining acclimation to eCO 2 are directly related to N acquisition. Decreased stomatal conductance resulting from higher internal CO 2 concentrations in leaves may cause low transpiration rates, thus interfering with mineral uptake and transport (Ainsworth & Rogers, 2007; Shi et al, 2021). Nitrogen partitioning within the plant and its availability to photosynthetically active leaves was shown to contribute to acclimation in soybean (Kanemoto et al, 2009), and its allocation to either biomass or optimization of the photosynthetic apparatus is important for crop yield (Biernath et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Acclimation to elevated CO₂ affects the C/N balance by reducing de novo N‐assimilation

Krämer

Kepp

Brock

et al. 2022

Physiologia Plantarum

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Plants exposed to elevated atmospheric CO2 concentrations show an increased photosynthetic activity. However, after prolonged exposure, the activity declines. This acclimation to elevated CO2 is accompanied by a rise in the carbon‐to‐nitrogen ratio of the biomass. Hence, increased sugar accumulation and sequential downregulation of photosynthetic genes, as well as nitrogen depletion and reduced protein content, have been hypothesized as the cause of low photosynthetic performance. However, the reason for reduced nitrogen content in plants at high CO2 is unclear. Here, we show that reduced photorespiration at increased CO2‐to‐O2 ratio leads to reduced de novo assimilation of nitrate, thus shifting the C/N balance. Metabolic modeling of acclimated and non‐acclimated plants revealed the photorespiratory pathway to function as a sink for already assimilated nitrogen during the light period, providing carbon skeletons for de novo assimilation. At high CO2, low photorespiratory activity resulted in diminished nitrogen assimilation and eventually resulted in reduced carbon assimilation. For the hpr1‐1 mutant, defective in reduction of hydroxy‐pyruvate, metabolic simulations show that turnover of photorespiratory metabolites is expanded into the night. Comparison of simulations for hpr1‐1 with those for the wild type allowed investigating the effect of a perturbed photorespiration on N‐assimilation.

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Effects of short-term exposure to elevated atmospheric CO2 on yield, nutritional profile, genetic regulatory pathways, and rhizosphere microbial community of common bean (Phaseolus vulgaris)

Duarte,

Nunes da Silva,

Fortunato

et al. 2024

Plant Soil

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Aim Legumes are vital to agroecosystems and human nutrition, yet climate change is compromising their nutritional value. This study aims to assess how a one-month exposure to elevated CO2 (eCO2) impacts biomass yield, mineral profile, gene expression, and the soil microbiome of common bean plants (Phaseolus vulgaris L.). Methods Phaseolus vulgaris L. was grown in field conditions under ambient CO2 (control, aCO2, 400 ppm) or eCO2 (600 pm) from the start of pod filling until plant maturity and analyzed for several morphophysiological and nutritional parameters. Results Compared with aCO2, eCO2 exposure significantly increased plant and grain biomass, with fluctuations in mineral accumulation. Notably, it decreased grain iron and zinc concentrations, two essential microelements related to food security, by 59% and 49%, respectively. Additionally, grain phenolic content decreased by up to 41%. Genes involved in mineral uptake (such as FER1, ZIP1, and ZIP16), plant response to stress (TCR1, TCR2, and HLH54) and symbiosis with soil microorganisms (NRMAP7 and RAM2) seemed to regulate effects. Microbiome analysis supported these findings, with an increase in the relative abundance of Pseudomonadota by 10%, suggesting eCO2-induced alterations in microbial community structure. Conclusions This research demonstrates how eCO2 impacts the nutritional quality of common beans regarding micronutrients and phenolic content, while also affecting soil microbiome composition. Highlighting the value of shorter term eCO2 treatments, the findings provide early insights into immediate plant responses. This underscores the need for crop improvement strategies to address nutrient deficiencies that may arise under future eCO2 conditions.

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Photosynthetic Acclimation and Growth Responses to Elevated CO2 Associate with Leaf Nitrogen and Phosphorus Concentrations in Mulberry (Morus multicaulis Perr.)

Cited by 4 publications

References 65 publications

Physiological and Molecular Responses of Woody Plants Exposed to Future Atmospheric CO2 Levels under Abiotic Stresses

Physiological and Molecular Responses of Woody Plants Exposed to Future Atmospheric CO2 Levels under Abiotic Stresses

Acclimation to elevated CO₂ affects the C/N balance by reducing de novo N‐assimilation

Effects of short-term exposure to elevated atmospheric CO2 on yield, nutritional profile, genetic regulatory pathways, and rhizosphere microbial community of common bean (Phaseolus vulgaris)

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Photosynthetic Acclimation and Growth Responses to Elevated CO2 Associate with Leaf Nitrogen and Phosphorus Concentrations in Mulberry (Morus multicaulis Perr.)

Cited by 4 publications

References 65 publications

Physiological and Molecular Responses of Woody Plants Exposed to Future Atmospheric CO2 Levels under Abiotic Stresses

Physiological and Molecular Responses of Woody Plants Exposed to Future Atmospheric CO2 Levels under Abiotic Stresses

Acclimation to elevated CO2 affects the C/N balance by reducing de novo N‐assimilation

Effects of short-term exposure to elevated atmospheric CO2 on yield, nutritional profile, genetic regulatory pathways, and rhizosphere microbial community of common bean (Phaseolus vulgaris)

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Acclimation to elevated CO₂ affects the C/N balance by reducing de novo N‐assimilation