Nitrogen and carbon contents, nitrogen use efficiency, and antioxidant responses of perennial ryegrass accessions to nitrogen deficiency

Yao, Yanyu; Zhang, Cankui; Camberato, James J.; Jiang, Yiwei

doi:10.1080/01904167.2019.1655047

Cited by 7 publications

(7 citation statements)

References 26 publications

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“…In this study, Chl a, Chl b, and TSP were reduced in both cultivars under low N stress, but to a larger extent in the sensitive Balin (Figures 1B,C, 5A). Our results were consistent with that found in perennial ryegrass (L. perenne L.) accessions to low N stress (Jiang et al, 2016;Yao et al, 2019). Meanwhile, the relatively higher amount of O 2…”

Section: Discussionsupporting

confidence: 92%

“…Moreover, low N stress decreased photosynthetic rate, chlorophyll content, chlorophyll fluorescence, and the nonphotochemical quenching, especially in the N-sensitive cultivar of Kentucky bluegrass (Sun et al, 2021). Reductions in plant height, shoot fresh and dry weight and shoot carbon content was also observed in the N-sensitive accession of perennial ryegrass (Lolium perenne L.) (Yao et al, 2019). Thus, a better understanding of plant responses to N supply especially under low N condition is crucial for fertility management programs of perennial grasses including Kentucky bluegrass.…”

Section: Introductionmentioning

confidence: 97%

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Differential Metabolomic Responses of Kentucky Bluegrass Cultivars to Low Nitrogen Stress

et al. 2022

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Kentucky bluegrass (Poa pratensis L.) is a cool-season turfgrass species that responds strongly to nitrogen (N), but the metabolomic responses of this grass species to N supply is unknown. The N-tolerant cultivar Bluemoon and N-sensitive cultivar Balin were exposed to normal N (15 mM) and low N (0.5 mM) for 21 days for identification of differentially expressed metabolites (DEMs) between normal N and low N treatments. Balin had more reductions of chlorophyll and total soluble protein concentrations and a higher accumulation of superoxide radicals under low N stress. A total of 99 known DEMs were identified in either cultivar or both including 22 amino acids and derivatives, 16 carbohydrates, 29 organic acids, and 32 other metabolites. In Bluemoon, β-alanine metabolism was most enriched, followed by alanine, aspartate, and glutamate metabolism, biosynthesis of valine, leucine, and isoleucine biosynthesis, and glycine, serine, and threonine metabolism. In Balin, alanine, aspartate, and glutamate metabolism were most enriched, followed by the tricarboxylic acid (TCA), glyoxylate and decarbohydrate metabolism, and carbon fixation. Bluemoon generally maintained higher TCA cycle capacity and had more downregulated amino acids, while changes in more organic acids occurred in Balin under low N stress. Some metabolite changes by low-N stress were cultivar-specific. The results suggested that regulation of metabolites related to energy production or energy saving could contribute to low N tolerance in Kentucky bluegrass.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 97%

Differential Metabolomic Responses of Kentucky Bluegrass Cultivars to Low Nitrogen Stress

et al. 2022

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“…Cultivation practices can significantly impact the soil environment, leading to nutrient and water stress and generating ROS with toxic effects (Hu et al, 2010;Yao et al, 2019). ROS, including superoxide radicals (O 2 .…”

Section: Discussionmentioning

confidence: 99%

Enhancing rainfed safflower yield, oil content, and fatty acid composition through intercropping with chickpea and stress-modifier biostimulants

Mosalman,

Rezaei-Chiyaneh,

Mahdavikia

et al. 2024

Front. Agron.

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This study investigated the impact of stress modifiers in intercropping systems on seed yield and yield components, physiological traits, and antioxidant activity of safflower (Carthamus tinctorius L.) and chickpea (Cicer arietinum L.) under rainfed (water deficit) conditions. The experimental design included three stress modulator levels [control, 1 mM salicylic acid (SA), and 10 mM selenium (Se)] and five planting patterns [intercropping one row of safflower and two rows of chickpeas (1S:2C), two rows of safflower and four rows of chickpeas (2S:4C), and three rows of safflower and five rows of chickpeas (3S:5C), and sole cropping of safflower (Ss) and chickpea (Cs)]. The results revealed that Ss treated with Se produced the highest safflower biological yield (4,905.50 kg ha−1) and seed yield (1,259.50 kg ha−1), while Cs produced the highest chickpea biological yield (2,799.67 kg ha−1) and seed yield (852.44 kg ha−1), followed by Cs treated with SA (2,419.25 kg ha−1 and 764.83 kg ha−1, respectively). Conversely, the 3S:5C intercropping ratio (IR) with Se application recorded the highest safflower oil content (32.08%), while Ss treated with Se produced the highest oil yield (358.62 kg ha−1). The 2S:4C configuration with Se application produced the highest unsaturated fatty acid (oleic and linoleic acids) concentrations in safflower, while 2S:4C and 3S:5C treated with Se produced the highest chlorophyll a and chlorophyll b contents in safflower and chickpea. Furthermore, 1S:2C and 2S:4C treated with SA or Se produced the highest proline and total soluble sugars in safflower and chickpea. The SA and Se treatments in the intercropping systems increased catalase, ascorbate peroxidase, and superoxide dismutase activities compared to the respective control plants (sole cropping) and enhanced oil contents, fatty acid composition, physiological traits, and antioxidant properties. These results underscore the potential of intercropping systems coupled with stress modulator treatments as a sustainable approach for safflower and chickpea cultivation under rainfed conditions.

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“…Cultivation practices alter the soil environment to produce nutrient and water stress, and produce the ROS toxic effect (Hu et al, 2010;Liu & Jiang, 2017;Yao et al, 2019). The ROS (O − 2 , H 2 O 2 ) are highly reactive and toxic, damaging DNA, proteins, liquids and carbohydrates to ultimately cause cell death (Gill & Tuteja, 2010) and accelerate crop roots senescence.…”

Section: Discussionmentioning

confidence: 99%

“…Changes in root antioxidation are an emergency response for crops needing to adapt to variations in the soil environment, e.g., water (Hu et al, 2010), nutrient (Liu & Jiang, 2017;Yao et al, 2019), heavy metal (Maiti et al, 2012;Zhang et al, 2007b), and salt stress (Zhu et al, 2004;Shalata & Tal, 2010). Superoxide anion radicals (O −…”

Section: Introductionmentioning

confidence: 99%

Improving maize’s N uptake and N use efficiency by strengthening roots’ absorption capacity when intercropped with legumes

Zheng

Zhang

Chen

et al. 2021

PeerJ

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Maize’s nitrogen (N) uptake can be improved through maize-legume intercropping. N uptake mechanisms require further study to better understand how legumes affect root growth and to determine maize’s absorptive capacity in maize-legume intercropping. We conducted a two-year field experiment with two N treatments (zero N (N0) and conventional N (N1)) and three planting patterns (monoculture maize (Zea mays L.) (MM), maize-soybean (Glycine max L. Merr.) strip intercropping (IMS), and maize-peanut (Arachis hypogaea L.) strip intercropping (IMP)). We sought to understand maize’s N uptake mechanisms by investigating root growth and distribution, root uptake capacity, antioxidant enzyme activity, and the antioxidant content in different maize-legume strip intercropping systems. Our results showed that on average, the N uptake of maize was significantly greater by 52.5% in IMS and by 62.4% in IMP than that in MM. The average agronomic efficiency (AE) of maize was increased by 110.5 % in IMS and by 163.4 % in IMP, compared to MM. The apparent recovery efficiency (RE) of maize was increased by 22.3% in IMS. The roots of intercropped maize were extended into soybean and peanut stands underneath the space and even between the inter-rows of legume, resulting in significantly increased root surface area density (RSAD) and total root biomass. The root-bleeding sap intensity of maize was significantly increased by 22.7–49.3% in IMS and 37.9–66.7% in IMP, compared with the MM. The nitrate-N content of maize bleeding sap was significantly greater in IMS and IMP than in MM during the 2018 crop season. The glutathione (GSH) content, superoxide dismutase (SOD), and catalase (CAT) activities in the root significantly increased in IMS and IMP compared to MM. Strip intercropping using legumes increases maize’s aboveground N uptake by promoting root growth and spatial distribution, delaying root senescence, and strengthening root uptake capacity.

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Nitrogen and carbon contents, nitrogen use efficiency, and antioxidant responses of perennial ryegrass accessions to nitrogen deficiency

Cited by 7 publications

References 26 publications

Differential Metabolomic Responses of Kentucky Bluegrass Cultivars to Low Nitrogen Stress

Differential Metabolomic Responses of Kentucky Bluegrass Cultivars to Low Nitrogen Stress

Enhancing rainfed safflower yield, oil content, and fatty acid composition through intercropping with chickpea and stress-modifier biostimulants

Improving maize’s N uptake and N use efficiency by strengthening roots’ absorption capacity when intercropped with legumes

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