Combined effects of elevated CO2 and soil drought on carbon and nitrogen allocation of the desert shrub Caragana intermedia

Xu, Zhenzhu; Zhou, Guangsheng; Wang, Yuhui

doi:10.1007/s11104-007-9424-0

Cited by 43 publications

(26 citation statements)

References 67 publications

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“…In the field experiments, root response to elevated CO 2 was quiet smaller compared to pot experiments with rice (Imai et al 1994;Kim et al 2001) such, stimulation of root growth in pots could be due to the increase nutrient availability in solution culture experiments. Similar results have been reported elsewhere when rice plants were grown in pots (Imai et al 1985;Makino et al 1997;Xu et al 2007). Imai et al (1994) found no positive increase in rice root dry mass in cv.…”

Section: Resultssupporting

confidence: 91%

Effects of elevated CO₂on plant growth and nutrient partitioning of rice (Oryza sativaL.) at rapid tillering and physiological maturity

Seneweera

2011

Journal of Plant Interactions

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To cite this article: Saman Seneweera (2011) Effects of elevated CO 2 on plant growth and nutrient partitioning of rice (Oryzasativa L.) This work investigates the relationship between plant growth, grain yield, nutrient acquisition and partitioning in rice (Oryza sativa L.) under elevated CO 2 . Plants were grown hydroponically in growth chambers with a 12-h photoperiod at either 370 or 700 mmol CO 2 mol (1 concentration. Plant dry mass (DM), grain yield and macroand micronutrient concentrations of vegetative organs and grains were determined. Elevated CO 2 increased biomass at tillering, and this was largely due to an increase in root mass by 160%. Elevated CO 2 had no effect on total nutrient uptake (N, P, K, Mg and Ca). However, nutrient partitioning among organs was significantly altered. N partitioning to leaf blades was significantly decreased, whereas the N partitioning into the leaf sheaths and roots was increased. Nutrient use efficiency of N, P, K, and Mg in all organs was significantly increased at elevated CO 2 . At harvest maturity, grain yield was increased by 27% at elevated CO 2 while grain (protein) concentration was decreased by a similar magnitude (28%), suggesting that critical nutrient requirements for rice might need to be reassessed with global climate change.

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Section: Resultssupporting

confidence: 91%

Effects of elevated CO₂on plant growth and nutrient partitioning of rice (Oryza sativaL.) at rapid tillering and physiological maturity

Seneweera

2011

Journal of Plant Interactions

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“…Similarly, a recent study reported that N deposition can increase the sensitivity of plants to climatic changes such as attendant drought (Hess et al, ). Moreover, a water deficit can result in the allocation of more plant N to sink organs such as root systems (Xu, Zhou, & Wang, ) and result in a decrease in soil available N through plants absorption (Yuan et al, ); in contrast, enhanced precipitation might easily result in N consumption in drylands (Ren et al, ; Song et al, ). In a grassland ecosystem in New Zealand, an accelerated N‐cycling process was observed with increased precipitation, promoting plant community functioning (de Klein, Shepherd, & van der Weerden, ).…”

Section: Discussionmentioning

confidence: 99%

Nitrogen deposition magnifies the sensitivity of desert steppe plant communities to large changes in precipitation

et al. 2019

Journal of Ecology

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Precipitation alteration and nitrogen (N) deposition caused by anthropogenic activities could profoundly affect the structure and functioning of plant communities in arid ecosystems. However, the plant community impacts conferred by large temporal changes in precipitation, especially with a concurrent increase in N deposition, remain unclear. To address this uncertainty, from 2016 to 2017, an in situ field experiment was conducted to examine the effects of five precipitation levels, two N levels and their interaction on the plant community function and composition in a desert steppe in northern China. Above‐ground net primary production (ANPP) and plant community‐weighted mean (CWM) height significantly increased with increasing precipitation, and both were well fitted with a positive linear model, but with a higher slope under N addition. The ANPP increase was primarily driven by the increase in Artemisia capillaris, a companion forb sensitive to precipitation variation. The plant community composition shifted with precipitation enhancement—from a community dominated by Stipa tianschanica, a perennial grass, to a community dominated by Artemisia capillaris. Synthesis. The findings imply that the ecosystem sensitivity to future changes in precipitation variability will be mediated by two potential mechanisms: concurrent N deposition and plant community‐level change. It is suggested that we should consider the vegetation compositional shift and multiple resource colimitation in assessing the sensitivity of terrestrial ecosystems to climate change.

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“…C. intermedia belongs to the family Fabaceae, and is a native desert shrub with strong drought-resistance, sand-fixing capacity and high forage value that is widespread in the desert land of west and northwest China [30]. From a scientific standpoint, it has proven an ideal material for studying the mechanisms of drought and salt tolerance of shrubs in China, because of its easy cultivation and strong abiotic resistance [30]–[32].…”

Section: Introductionmentioning

confidence: 99%

“…From a scientific standpoint, it has proven an ideal material for studying the mechanisms of drought and salt tolerance of shrubs in China, because of its easy cultivation and strong abiotic resistance [30]–[32].…”

Section: Introductionmentioning

confidence: 99%

Reference Gene Selection for Quantitative Real-time PCR Normalization in Caragana intermedia under Different Abiotic Stress Conditions

et al. 2013

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Quantitative real-time reverse transcription polymerase chain reaction (qPCR), a sensitive technique for gene expression analysis, depends on the stability of the reference genes used for data normalization. Caragana intermedia, a native desert shrub with strong drought-resistance, sand-fixing capacity and high forage value that is widespread in the desert land of west and northwest China, has not been investigated regarding the identification of reference genes suitable for the normalization of qPCR data. In this study, 10 candidate reference genes were analyzed in C. intermedia subjected to different abiotic (osmotic, salt, cold and heat) stresses, in two distinct plant organs (roots and leaves). The expression stability of these genes was assessed using geNorm, NormFinder and BestKeeper algorithms. The best-ranked reference genes differed across the different sets of samples, but UNK2, PP2A and SAND were the most stable across all tested samples. UNK2 and SAND would be appropriate for normalizing gene expression data for salt-treated roots, whereas the combination of UNK2, SAND and EF-1α would be appropriate for salt-treated leaves. UNK1, UNK2 and PP2A would be appropriate for PEG-treated (osmotic) roots, whereas the combination of TIP41 and PP2A was the most suitable for PEG-treated leaves. SAND, PP2A and TIP41 exhibited the most stable expression in heat-treated leaves. In cold-treated leaves, SAND and EF-1α were the most stably expressed. To further validate the suitability of the reference genes identified in this study, the expression levels of DREB1 and DREB2 (homologs of AtDREB1 and AtDREB2) were studied in parallel. This study is the first systematic analysis for the selection of superior reference genes for qPCR in C. intermedia under different abiotic stress conditions, and will benefit future studies on gene expression in C. intermedia and other species of the leguminous genus Caragana.

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Combined effects of elevated CO2 and soil drought on carbon and nitrogen allocation of the desert shrub Caragana intermedia

Cited by 43 publications

References 67 publications

Effects of elevated CO₂on plant growth and nutrient partitioning of rice (Oryza sativaL.) at rapid tillering and physiological maturity

Effects of elevated CO₂on plant growth and nutrient partitioning of rice (Oryza sativaL.) at rapid tillering and physiological maturity

Nitrogen deposition magnifies the sensitivity of desert steppe plant communities to large changes in precipitation

Reference Gene Selection for Quantitative Real-time PCR Normalization in Caragana intermedia under Different Abiotic Stress Conditions

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Combined effects of elevated CO2 and soil drought on carbon and nitrogen allocation of the desert shrub Caragana intermedia

Cited by 43 publications

References 67 publications

Effects of elevated CO2on plant growth and nutrient partitioning of rice (Oryza sativaL.) at rapid tillering and physiological maturity

Effects of elevated CO2on plant growth and nutrient partitioning of rice (Oryza sativaL.) at rapid tillering and physiological maturity

Nitrogen deposition magnifies the sensitivity of desert steppe plant communities to large changes in precipitation

Reference Gene Selection for Quantitative Real-time PCR Normalization in Caragana intermedia under Different Abiotic Stress Conditions

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Effects of elevated CO₂on plant growth and nutrient partitioning of rice (Oryza sativaL.) at rapid tillering and physiological maturity

Effects of elevated CO₂on plant growth and nutrient partitioning of rice (Oryza sativaL.) at rapid tillering and physiological maturity