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1

Spatiotemporal characteristics and influencing factors of China’s construction industry carbon intensity

100%

Du Q., Wu M., Wang N., Bai L.

Polish Journal of Environmental Studies

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2017

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tom 26

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nr 6

Climate change continuously threatens sustainable development. As the largest energy consumer and carbon emitter in the world, China is facing increasing pressure to cut carbon emissions. Based on Moran’s index I and geographically weighted regression, this paper investigates the spatiotemporal characteristics and the dominating factors of China’s province-level carbon intensity in the construction industry from 2005 to 2014, which is aimed at providing a scientific basis for government while implementing a regional-oriented carbon emissions reduction strategy. The empirical results are shown as follows. Firstly, carbon intensity in the construction industry of each province has been decreasing in the past 10 years. Secondly, provincial carbon intensity in this sector shows significant positive spatial autocorrelation characteristics and the degree of spatial clustering of carbon intensity tended to weaken in this period. Third, according to the analysis of the geographically weighted regression (GWR) model, carbon intensity is positively affected by energy intensity while the labor input and production efficiency both have negative effect. Particularly the regression coefficient of labor input is almost twice as large as the other two factors. The results reveal that there is a significant spatial disparity of these three factors in different provinces.

2

The uptake, accumulation, and toxic effects of cadmium in barnyardgrass (Echinochloa crus-galli)

100%

Peng Q., Chen W., Wu L., Bai L.

Polish Journal of Environmental Studies

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2017

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tom 26

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nr 2

Cadmium (Cd) is regarded as one of the most toxic environmental pollutants. A better understanding of the growth response, uptake, and translocation of Cd in barnyard grass (Echinochloa crus-galli) would be helpful for evaluating the role of this grass species as a potential candidate to be used for phytoremediation. The studied plants were grown in treated soils with increasing doses of Cd (0, 0.3, 0.6, 0.9, and 1.5 mg·kg⁻¹). The results showed that Cd contents in plant tissues were found to increase with increasing doses of Cd. The pattern of Cd accumulation in different parts of the plant were found as: root > aboveground part > seed. Translocation factor (TF) values were found to be less than 1, and translocation from root to aboveground part was found to be higher as compared to that of aboveground part to seed. There was no significant difference on the aboveground part fresh weight (FW) and tiller number per plant under different concentrations of Cd stress. The root FW and the lengths of roots and shoots were significantly decreased in response to Cd treatments at low concentrations. However, the 1.5 mg·kg⁻¹ Cd application didn’t affect significant changes on the root and shoot length than that of the control. A high concentration of cadmium supply could promote chlorophyll content. SOD showed a similar trend to POD in Cd-exposed plants, with an increase at lower concentrations and a decrease at higher concentrations.

3

MicroRNA and target gene responses to salt stress in grafted cucumber seedlings

88%

Li Y., Li C., Bai L., He C., Yu X.

Acta Physiologiae Plantarum

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2016

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tom 38

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nr 02

4

Effects of water stress on growth, biomass partitioning, and water-use efficiency in summer maize (Zea mays L.) throughout the growth cycle

88%

Ge T., Sui F., Bai L., Tong C., Sun N.

Acta Physiologiae Plantarum

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2012

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tom 34

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nr 3

The aim of this study was to explore the effects of water stress on the growth, biomass partitioning, and water-use efficiency (WUE) of summer maize (Zea mays L.) throughout the growth cycle. Maize field trials were conducted under a completely randomized design with three field water capacity (FC) regimes. Water was delivered to plants as follows: 75% FC was considered low water stress and the control, 55% FC medium stress, and 35% FC high stress. The controlled irrigation was initiated from the third leaf stage until maturity. The results of 2 years of field trials indicated that maize development and grain yield responses to water stress depended on the severity of stress, including intensity and duration, but also on maize developmental stage. Medium water stress (55%) affected leaf area at the seventeenth (V17) leaf stage, tasseling and silking emergence, leaf extension, and final leaf number to a minor degree. However, 55% FC significantly decreased plant height, leaf area (except for V17), stem diameter, biomass accumulation, net photosynthesis and transpiration rates at different developmental stages. In particular, tasseling and silking, and yield parameters, including ear kernel number and 100-kernel dry weight decreased with increasing medium water stress duration. Severe water stress (35% FC) exhibited increased detrimental effects on all vegetative and yield parameters at different development stages, and resulted in a maturation period delay. Severe stress caused notable reductions in WUE at vegetative and reproductive stages, whereas moderate stress resulted in WUE increases at early and middle stages, and significant decreased WUE at late stages. Overall, these results collectively showed that the negative effects of 2 years of high stress conditions (35% FC) on maize plants were evident in vegetative and yield parameters. We recommend that water deficits or reduced irrigation, and 55% water field capacity, be considered for irrigation scheduling before the maize tasseling stage in neutral loam, meadow soil for sub-humid regions under water limited conditions.

5

Benefit allocation in the construction supply chain considering carbon emissions

76%

Du Q., Huang Y., Xu Y., Bai L., Bao T., Wang H.

Polish Journal of Environmental Studies

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2019

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tom 28

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nr 5

The construction industry has played an important role in reducing carbon emissions. Various policies have been implemented to stimulate construction enterprises to reduce carbon emissions, but the effects of emission reduction are not obvious, for they do not directly benefit the enterprises. This paper employs a modified Shapley value method to study benefit allocation in a construction supply chain considering carbon emissions. Four correction factors are proposed for modifying the initial allocation, namely the contribution rate of inputs, the risk-sharing coefficient, the degree of cooperation and the contribution rate of carbon emissions. We analyze carbon emissions based on an illustrative example of a concrete supply chain consisting of a cement manufacturer, a concrete manufacturer and a construction enterprise, and present our findings. First, the enterprises intend to cooperate to achieve the greatest benefit, and second, the benefit allocation is greatly affected by carbon emissions. Participants that produce more carbon emissions have higher carbon tax costs, which reduce profits. Further suggestions are also presented, which may help enterprises reduce carbon emissions. And policy makers should arrive at a suitable level of carbon tax to promote the smooth progress of projects and to improve the emission reduction effect.

6

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Methyl jasmonate-induced accumulation of metabolites and transcriptional responses involved in triterpene biosynthesis in Siraitia grosvenorii fruit at different growing stages

76%

Zhang K., Luo Z., Guo Y., Mo C., Tu D., Ma X., Bai L.

Acta Societatis Botanicorum Poloniae

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2016

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tom 85

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nr 3

The cucurbitane-type triterpenoid glycosides, mogrosides, are the main active components of Siraitia grosvenorii fruit. Squalene and cucurbitadienol are among the intermediates of the biosynthetic pathway for the formation of cucurbitane-type triterpenoid backbones of mogrosides. It is recognized that the exogenous application of methyl jasmonate (MeJA) increases the accumulation of secondary metabolites in various plant species. Here, the effect of MeJA (50, 200, and 500 μM) on the accumulation of squalene and cucurbitadienol in the fruits of S. grosvenorii at 10, 20, and 30 days after flowering (DAF) was tested for the first time. Since mogroside II E is the main cucurbitane-type triterpenoid present at this time, its concentration was also determined. The results show that MeJA can indeed promote squalene and cucurbitadienol accumulation, the application of 500 μM MeJA at 30 DAF being optimal. The concentration of squalene and cucurbitadienol increased up to 0.43 and 4.71 μg/g dry weight (DW), respectively, both of which were 1.2-fold greater than that of the control. The content of mogroside II E increased by 15% over the untreated group. We subsequently analyzed the expression of key genes involved in the mogroside biosynthetic pathway, including the 3-hydroxy-3-methylglutaryl-coenzyme A reductase gene (SgHMGR), squalene synthetase gene (SgSQS), cucurbitadienol synthase gene (SgCS), and cytochrome P450 (SgCYP450) with quantitative real-time PCR. The results showed that transcriptional levels of these genes were upregulated following the treatment described above. Additionally, their responses in the presence of MeJA was related to the concentration and timing of MeJA treatment.

7

Screening and identifying a cadmium-resistant fungus and characterizing its cadmium adsorption

64%

Deng Y., Wang L., Luo K., Peng D., Jiang H., Jin C., Zhou X., Bai L.

Polish Journal of Environmental Studies

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2017

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tom 26

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nr 3

The main aim of this study was to screen and identify cadmium-resistant fungus and to characterize its cadmium adsorption. A cadmium-resistant strain (CN35) was isolated from cadmium-polluted paddy soil. Based on morphlogical characteristics, internal transcribed spacers region and β-tubulin gene sequence phylogenesis analysis, the strain was preliminarily identified to be Penicillium sp. This strain was resistant to Cd at 45 mM with Cd adsorption rate up to 83.56%, and also resistant to other heavy metals such as Pb, Zn, and Cu. When Cd²⁺ concentration ranged from 2 to 5 mM, the fungal colony changed from yellow/green to red. The colony morphology was also affected by Cd²⁺ concentrations with protuberances forming on the colony surface at 20 mM. The strain CN35 was found to grow well at pH 4 to 8 at between 24ºC and 37ºC, and the optimal growth conditions were established to be at pH 4 and 30ºC. Fermented liquid of the strain is neither disease-causing nor inhibitory to rice seedling emergence, but rather improves rice seedling and root growth and enhances rice detoxification ability under Cd stress. Thus, the Cd-resistant fungus CN35 has the potential to treat Cd-polluted rice paddies.

Ograniczanie wyników

Spatiotemporal characteristics and influencing factors of China’s construction industry carbon intensity

The uptake, accumulation, and toxic effects of cadmium in barnyardgrass (Echinochloa crus-galli)

MicroRNA and target gene responses to salt stress in grafted cucumber seedlings

Effects of water stress on growth, biomass partitioning, and water-use efficiency in summer maize (Zea mays L.) throughout the growth cycle

Benefit allocation in the construction supply chain considering carbon emissions

Methyl jasmonate-induced accumulation of metabolites and transcriptional responses involved in triterpene biosynthesis in Siraitia grosvenorii fruit at different growing stages

Screening and identifying a cadmium-resistant fungus and characterizing its cadmium adsorption