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Effect of nano-silver coating on microbial control of microwave-freeze combined dried sea cucumber

100%
Li X., Zhang M., Duan X., Mujumdar A.
International Agrophysics
|
2011
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tom 25
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nr 2
2

Identification and molecular mapping of a resistance gene to powdery mildew from the synthetic wheat line M53

88%
Li T., Zhang Z., Hu Y., Duan X., Xin Z.
Journal of Applied Genetics
|
2011
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tom 52
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nr 2
Powdery mildew disease caused by Blumeria graminis f. sp. tritici (Bgt) is an economically important disease in wheat worldwide. The identification of germplasms resistant to the disease can not only facilitate the breeding of resistant cultivars, but can also broaden the diversity of resistance genes. The Mexican M53 is a synthetic hexaploid wheat line developed at the International Maize and Wheat Improvement Center (CIMMYT) from the cross between Triticum durum and Aegilops tauschii249. Infection of M53 with 15 different pathogen races revealed that the resistance in M53 was race-dependent and effective against the majority of the tested Bgt races, including the race 15 predominant in the Beijing wheat growing area. Inoculation of the parents of M53 with the race 15 demonstrated that M53 and Ae. tauschii249 were resistant, whereas T. durum was susceptible. The inoculation of three segregating F2 populations developed from the crosses between M53 and three susceptible Chinese wheat cultivars with the race 15 showed that the resistant gene in M53 segregated in a single dominant manner. Amplified fragment length polymorphism (AFLP) and simple sequence repeat (SSR) markers were used to map the gene in a segregating F2 population consisting of 213 lines developed from the cross Wan7107 × M53. Two closely linked AFLP markers, Apm109 and Apm161, were identified to flank the gene with genetic distances of 1.0 cM and 3.0 cM, respectively. The recognized gene was assigned to the long arm of chromosome 5D as determined by three linked SSR markers, Xwmc289b, Xgwm583, and Xgwm292, and by the physical mapping of Apm109 using Chinese Spring nullisomic–tetrasomic and ditelosomic stocks. The resistance gene identified in M53, temporarily designated as Pm-M53, could be used in local wheat-breeding programs to improve powdery mildew resistance.
3

Thallium, Arsenic, and Mercury contamination of soil near the world’s largest and longest- operating tungsten mine

88%
Cheng H., Duan X., Liu S., Lin C., Shao X.
Polish Journal of Environmental Studies
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2013
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tom 22
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nr 1
Little is known about soil thallium contamination near tungsten (W) mines. This study investigated thallium, arsenic, and mercury contents and enrichment in agricultural soils near the world’s largest and longestoperating W mine in China. Results show that the long-term W mining significantly elevated Tl from 0.77 to 1.61 mg·kg⁻¹ and As from 7.54 to 22.64 mg·kg⁻¹, with enrichment factors of 2.0 (1.4 to 3.7) and 2.9 (1.5 to 7.2), respectively. Hg contents were similar at the contaminated site (0.16 mg·kg⁻¹) and control site (0.19 mg·kg⁻¹), but were two to three times higher than the soil background content of Jianxi province. Thus, Hg contamination in the soil probably was mainly caused by coal and petrol burning instead of W mining.
4

Effect of hydroxyl radical on the scission of cellular wall polysaccharides in vitro of banana fruit at various ripening stages

76%
Cheng G., Duan X., Yang B., Jiang Y., Lu W., Luo Y., Jiang W.
Acta Physiologiae Plantarum
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2008
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tom 30
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nr 2
Fruit ripening is generally attributed to disassembly of cellular wall, particularly due to solubilisation and depolymerisation of pectin and hemicellulose. Experiments were conducted to test effects of hydroxyl radicals (OH) on the scission of cellular wall polysaccharides from pulp tissues of banana fruit at different ripening stage. Cellular wall materials were isolated from pulp tissues of banana fruit at different ripening stages. Two pectic fractions, water soluble pectin (WSP) and acid soluble pectin (ASP), and two hemicellulosic fractions, 1 M KOH soluble hemicellulose (HC1) and 4 M KOH soluble hemicellulos (HC2), were obtained from the cellular wall materials from pulp tissues, respectively. Effects of OH induced by the Fenton reaction on the scission of pectin and hemicellulose in vitro were investigated. As fruit ripening progressed, the sugar components of the WSP, HC1 and HC2 attacked by OH showed obvious molecular-mass downshifts. Thus, OH caused the disassembly of polysaccharides (WSP, ASP, HC1 and HC2) from cellular walls of pulp tissues of banana fruit, demonstrated by the reduced molecular mass distribution. Moreover, OH production in pulp tissues increased significantly as banana fruit ripened, which further help account for the role of OH in accelerated fruit ripening.
5

Natural cold acclimation of Ligustrum lucidum in response to exogenous application of paclobutrazol in Beijing

76%
Yang Y., Zhang R., Duan X., Hu Z., Shen M., Leng P.
Acta Physiologiae Plantarum
|
2019
|
tom 41
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nr 01
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