Gas Exchange, Chlorophyll and Growth Responses of Betula Platyphylla Seedlings to Elevated CO2 and Nitrogen

Zhao, X.Q.; Z, Mao; Xu, Juan

doi:10.5539/ijb.v2n1p143

Cited by 21 publications

(14 citation statements)

References 15 publications

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“…High soil nitrogen supply enhanced the absorption rate of leaves due to increased chlorophyll content (Singh and Agrawal, 2015). A similar finding had been reported by Zhao et al (2010). PGPR can have an important role in increasing the amount of nitrogen through fixation of atmospheric nitrogen.…”

Section: Effect Of Treatments On Leaf and Petal Pigmentssupporting

confidence: 81%

Organic N-fertilizer, rhizobacterial inoculation and fungal compost improve nutrient uptake, plant growth and the levels of vindoline, ajmalicine, vinblastine, catharanthine and total alkaloids in Catharanthus roseus L.

Hashemabadi

Sabzevari

Kaviani

et al. 2018

Folia Horticulturae

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The aim of the study was to replace mineral fertilizers with organic and biological fertilizers to improve nutrient uptake, plant growth and the concentrations of some important secondary metabolites in periwinkle (Catharanthus roseus L.). Periwinkle plants were grown under different rates of N supply (0, 20 and 40 mg kg -1 soil) and biological treatments (Azospirillum, Azotobacter, Azospirillum plus Azotobacter, Azospirillum plus fungal compost, Azotobacter plus fungal compost, and fungal compost). The concentrations of pigments and nutrients were measured by spectrophotometry and flame photometry. Secondary metabolites were analyzed by high-performance liquid chromatography (HPLC). Data were recorded for plant growth and development parameters, nutrient uptake and some secondary metabolites of periwinkle plants. The results showed that the N-fertilizer and biological treatments significantly improved most growth attributes and nutrient uptake and increased the concentrations of secondary metabolites as compared to the control. Maximum concentrations of root ajmalicine (0.54 mg g -1 DW), leaf vinblastine (0.96 mg g -1 DW) and root catharanthine (2.38 mg g -1 DW) were obtained from the treatment with Azospirillum under N-fertilizer at 20 and 40 mg kg -1 soil. Azotobacter along with fungal compost under N-fertilizer at 40 mg kg -1 soil induced the maximum concentration of leaf vindoline (1.94 mg g -1 DW). The highest concentration of root alkaloids (1.11 mg g -1 DW) was obtained from the treatment with compost under 40 mg N kg -1 soil. Azospirillum, Azotobacter and fungal compost combined with the N-fertilizer improved many morphological and nutrient characteristics. In conclusion, the growth and metabolism of C. roseus were significantly positively affected by the organic and biological fertilizers. Ke y wor d s: nitrogen fertilizer, periwinkle, plant secondary metabolites, root inoculation, Vinca rosea Organic N-fertilizer, rhizobacterial inoculation and fungal compost improve nutrient uptake, plant growth and the levels of vindoline, ajmalicine, vinblastine, catharanthine and total alkaloids in Catharanthus roseus L.

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Section: Effect Of Treatments On Leaf and Petal Pigmentssupporting

confidence: 81%

Organic N-fertilizer, rhizobacterial inoculation and fungal compost improve nutrient uptake, plant growth and the levels of vindoline, ajmalicine, vinblastine, catharanthine and total alkaloids in Catharanthus roseus L.

Hashemabadi

Sabzevari

Kaviani

et al. 2018

Folia Horticulturae

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“…It was reported that CO 2 supplementation limits the uptake of N and the synthesis of nitrogenous compounds of vegetables by 9.5% [47]. In the literature, it was reported among different mineral elements that Fe concentration experienced the greatest decrease (31%) in leafy greens grown under supplemented CO 2 conditions [17]. In the current study, contrasting results were seen for basil 'Cardinal' where Fe concentration increased significantly in CO 2 supplemented conditions.…”

Section: Discussioncontrasting

confidence: 66%

“…Similar to the present study, Gillig et al [32] also reported a significant decrease in chlorophyll level in hydroponically grown basil when grown at 400 and 1500 ppm CO 2 . Similarly, development of interveinal chlorosis was observed due to the accumulation of large grains of starch in basil grown under 1500 ppm CO 2 concentration [17]. The chlorophyll level under supplemented CO 2 can be explained by movement of N to other sinks or it may be due to degradation of the chlorophyll [37].…”

Section: Discussionmentioning

confidence: 87%

“…Greenness of leafy vegetables is an indicator of carotene content [14] as well as an influential trait affecting consumer preference and acceptability [15]. It was reported that CO 2 supplementation can result in increased or decreased leaf chlorophyll content of leaves [16,17]. At the same time, meta-analysis conducted by Dong et al [18] reported that CO 2 supplementation had no effect on chlorophyll concentration.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Greenhouse CO2 Supplementation on Yield and Mineral Element Concentrations of Leafy Greens Grown Using Nutrient Film Technique

et al. 2020

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Carbon dioxide (CO2) concentration is reported to be the most important climate variable in greenhouse production with its effect on plant photosynthetic assimilation. A greenhouse study was conducted using a nutrient film technique (NFT) system to quantify the effect of two different levels of CO2 (supplemented at an average of 800 ppm and ambient at ~410 ppm) on growth and nutritional quality of basil (Ocimum basilicum L.) ‘Cardinal’, lettuce (Lactuca sativa L.) ‘Auvona’, and Swiss chard (Beta vulgaris L.) ‘Magenta Sunset’ cultivars. Two identical greenhouses were used: one with CO2 supplementation and the other serving as the control with an ambient CO2 concentration. The results indicate that supplemented CO2 could significantly increase the height and width of hydroponically grown leafy greens. Supplemented CO2 increased the fresh weight of basil ‘Cardinal’, lettuce ‘Auvona’, and Swiss chard ‘Magenta Sunset’ by 29%, 24.7%, and 39.5%, respectively, and dry weight by 34.4%, 21.4%, and 40.1%, respectively. These results correspond to a significant reduction in Soil Plant Analysis Development (SPAD) and atLEAF values, which represent a decrease in leaf chlorophyll content under supplemented CO2 conditions. Chlorophyll, nitrogen (N), phosphorus (P), and magnesium (Mg) concentrations were generally lower in plants grown in supplemented CO2 conditions, but the results were not consistent for each species. Supplemented CO2 reduced tissue N concentration for basil ‘Cardinal’ and lettuce ‘Auvona’ but not Swiss chard, while Mg concentration was reduced in supplemented CO2 for Swiss chard ‘Magenta Sunset’ only. In contrast, Fe concentration was increased under supplemented CO2 for basil ‘Cardinal’ only. These findings suggest CO2 supplementation could increase yield of leafy greens grown with hydroponics and have varying impact on different mineral concentrations among species.

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“…In addition, a small decrease in Rubisco content via suppression of Rubisco small subunit (RBC) genes led to increased chlorophyll content under eCO 2 conditions [16]. In contrast, the chlorophyll content was significantly reduced under eCO 2 conditions in some seedling experiments [66,67].…”

Section: Pnue and N Allocation Under Eco2 Conditions And N Fertilizationmentioning

confidence: 99%

Down-Regulation of Photosynthesis to Elevated CO2 and N Fertilization in Understory Fraxinus rhynchophylla Seedlings

Byeon

Kim

Hong

et al. 2021

Forests

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(1) Background: Down-regulation of photosynthesis has been commonly reported in elevated CO2 (eCO2) experiments and is accompanied by a reduction of leaf nitrogen (N) concentration. Decreased N concentrations in plant tissues under eCO2 can be attributed to an increase in nonstructural carbohydrate (NSC) and are possibly related to N availability. (2) Methods: To examine whether the reduction of leaf N concentration under eCO2 is related to N availability, we investigated understory Fraxinus rhynchophylla seedlings grown under three different CO2 conditions (ambient, 400 ppm [aCO2]; ambient × 1.4, 560 ppm [eCO21.4]; and ambient × 1.8, 720 ppm [eCO21.8]) and three different N concentrations for 2 years. (3) Results: Leaf and stem biomass did not change under eCO2 conditions, whereas leaf production and stem and branch biomass were increased by N fertilization. Unlike biomass, the light-saturated photosynthetic rate and photosynthetic N-use efficiency (PNUE) increased under eCO2 conditions. However, leaf N, Rubisco, and chlorophyll decreased under eCO2 conditions in both N-fertilized and unfertilized treatments. Contrary to the previous studies, leaf NSC decreased under eCO2 conditions. Unlike leaf N concentration, N concentration of the stem under eCO2 conditions was higher than that under ambient CO2 (4). Conclusions: Leaf N concentration was not reduced by NSC under eCO2 conditions in the understory, and unlike other organs, leaf N concentration might be reduced due to increased PNUE.

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Gas Exchange, Chlorophyll and Growth Responses of Betula Platyphylla Seedlings to Elevated CO2 and Nitrogen

Cited by 21 publications

References 15 publications

Organic N-fertilizer, rhizobacterial inoculation and fungal compost improve nutrient uptake, plant growth and the levels of vindoline, ajmalicine, vinblastine, catharanthine and total alkaloids in Catharanthus roseus L.

Organic N-fertilizer, rhizobacterial inoculation and fungal compost improve nutrient uptake, plant growth and the levels of vindoline, ajmalicine, vinblastine, catharanthine and total alkaloids in Catharanthus roseus L.

Effect of Greenhouse CO2 Supplementation on Yield and Mineral Element Concentrations of Leafy Greens Grown Using Nutrient Film Technique

Down-Regulation of Photosynthesis to Elevated CO2 and N Fertilization in Understory Fraxinus rhynchophylla Seedlings

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