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1

Comparative analysis of natural cold acclimation and deacclimation of two Magnolia species with different winter hardiness

100%
Yang Y., Jia Z., Chen F., Sang Z., Ma L.
Acta Physiologiae Plantarum
|
2015
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tom 37
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nr 07
Winter injury is frequently observed in the rare species Magnolia wufengensis L.Y. Ma et L.R. Wang, but rarely in Magnolia denudata Desr in northern China. To improve the understanding of the causes for poor winter hardiness of M. wufengensis, the physiological and biochemical processes of M. denudata and M. Wufengensis during natural cold acclimation and deacclimation were investigated and compared. In early cold acclimation, the growth cessation of M. wufengensis was later than that of M. denudata, and the leaf senescence was also slower in M. wufengensis. Both the bud dormancy level and shoot freezing tolerance were lower in M. wufengensis throughout cold acclimation and deacclimation. A significant development in bud dormancy level and shoot freezing tolerance appeared long after growth cessation for M. wufengensis but soon for M. denudata. The increase rates of dormancy level and freezing tolerance during cold acclimation were lower in M. wufengensis, while the corresponding decrease rates of these two parameters during deacclimation were also lower in M. wufengensis. The interspecific differences in freezing tolerance highly correlated with the dehydration and accumulation of proline and certain soluble sugars. We conclude that weaker mid-winter cold hardiness and slower cold acclimation should be the reasons for poorer winter hardiness in M. wufengensis.
2

Trivalent chromium pretreatment alleviates the toxicity of oxidative damage in wheat plants exposed to hexavalent chromium

100%
Liu C., Du W., Cai H., Jia Z., Dong H.
Acta Physiologiae Plantarum
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2014
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tom 36
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nr 03
Treating plants with abiotic or biotic factors can lead to the establishment of a unique primed state of defense. Primed plants display enhanced defense reactions upon further challenge with environmental stressors. Here, we report that trivalent chromium (Cr(III)) pretreatment can alleviate hexavalent chromium (Cr(VI)) toxicity in 2-week-old wheat plants. The data indicate that Cr(III)- pretreated wheat displayed longer survival times and less heavy metal toxicity symptoms under Cr(VI) exposure than the control. To investigate the possible mechanism from an antioxidant defense perspective, we determined the H₂O₂ and lipid peroxide content (TBARS), the activities of antioxidant enzymes (SOD, CAT, APX and GR) and the antioxidant metabolite content (ascorbate and glutathione content, AsA/DHA and GSH/GSSG ratios) in pretreated wheat roots. The results showed that 0.5 μM Cr(III) pretreatment can alleviate oxidative damage, such as H₂O₂ and TBARS accumulation, in root tissues compared to the control during the first 3 days of Cr(VI) exposure. Furthermore, we determined that this pretreatment can significantly increase the antioxidant enzyme activities and total ascorbate and glutathione contents compared to the control treatment. In addition, redox homeostasis declined slightly in pretreated wheat compared to the control in the presence of Cr(VI). We discuss a possible mechanism for Cr(III)-mediated protection of wheat.
3

Nitrogen utilization characteristics and their influence on groundwater in the Weishan Irrigation Region

86%
Zhao Z., Jia Z., Guan Z., Zheng F., Wei T., Wang D.
Polish Journal of Environmental Studies
|
2020
|
tom 29
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nr 6
4

Hydrochemistry characteristics and water quality assessment for irrigation along the Second Songhua River in the south of the Songnen Plain, northeast China

86%
Sun X., Bian J., Zhang C., Wang Y., Wan H., Jia Z.
Polish Journal of Environmental Studies
|
2020
|
tom 29
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nr 1
5

Early differential gene expression profiling of harvest-induced senescence in detached Arabidopsis plants

86%
Chang J., Zhang L., Jia Z., Gu H., Hong K., Gong D.
Acta Physiologiae Plantarum
|
2015
|
tom 37
|
nr 08
After a series of stresses, detached plant organs such as leafy vegetables and cut flowers begin to appear declining in quality and then finally senescence. Comprehending, plants’ response to multiple stresses may result in new opportunities to extend the shelf life of postharvest. We investigated physiological responses of Arabidopsis plants after harvest and analyzed global gene transcription in dark-stored detached Arabidopsis plants leaves (DSD). Detached darkened plants of Arabidopsis were stored for 12 h in airtight boxes. Multiple stresses caused a distinguished decrease in chlorophyll, protein content and premature senescence of leaves. The microarray analysis revealed that 852 transcripts were upregulated and 1004 transcripts were downregulated, respectively, more than twofold. A gene ontology test and biological process analysis suggested that activated genes were mostly associated with regulation of transcription, secondary metabolism, response to water deprivation, signal transduction, and other stress responses. Meanwhile, genes that were downregulated were involved in protein biosynthesis, protein folding, lipid catabolism, ribosome biogenesis and assembly, ATP binding, and photosynthesis. Gene expression analysis data suggested that the leaves of detached Arabidopsis plants responded to integrated stresses by regulating diverse gene expression in leaves.
6

Novel advanced treatment of physically treated effluent from herbal decoction pieces wastewater using a combined Ozone/Persulfate-UBAF Process

72%
Tang G., Chen W., Wei Y., Shao T., Zhang M., Jia Z., Yu X., Ma F.
Polish Journal of Environmental Studies
|
2019
|
tom 28
|
nr 4
Performance of ozone/persulfate-UBAF used for advanced treatment of physically treated effluent from herbal decoction pieces of wastewater was investigated in a pilot scale experiment. Under optimum conditions – i.e., an initial pH, temperature 13-27ºC, 30 min of oxidation, 35 mg/L O₃ dosage, S₂ O₈²⁻ /COD (g/g) ratio (0.15), gas/liquid ratio in UBAF (3), hydraulic retention time in UBAF (5h)– the COD and NH₃ -N removal efficiencies were 87.54-89.53% and 82.94-86.77%, respectively. Under optimum conditions, ozone/persulfate oxidation lowered pH values by about 0.1 pH units (average value), presented lower OCC (from 0.14 to 0.16 kg O₃ /kg COD removed), and significantly improved the wastewater biodegradability from 0.16 to 0.55 (average value). Compared with O₃ /H₂ O₂ oxidation, the ozone/persulfate system achieved a better enhancement effect in wastewater treatment (i.e., decreased 24.0% OCC and saved 11.4% in operational costs). Furthermore, the COD removal rate in ozone/persulfate oxidation stage followed the first order ln(C/C₀)=- 0.0167t , and the COD concentration in UBAF effluent was expressed by the model C/C₀=exp(-0.2940/-L⁰‧⁰⁹¹² H) at various hydraulic loading ratesfor maintenance and selection of UBAF. Finally, the study proved that the combined process was an efficient technology in treating physically treated effluent from herbal decoction pieces wastewater.
7

Phenotypic and transcriptome analysis on red leaf and green leaf Eucommia ulmoides Oliver

72%
Yang Y., Zhu J., Chen M., Zhao H., Liu P., Ding H., Jia Z., Du H.
Acta Physiologiae Plantarum
|
2020
|
tom 42
|
nr 04
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