Li Y.-F.,South China Agricultural University |
Jiang H.-X.,South China Agricultural University |
Xiang R.,Guangdong Academy of Agricultural Sciences |
Sun N.,Institute of Special Animal and Plant science |
And 5 more authors.
Journal of Integrative Agriculture | Year: 2016
The objective of this study was to verify the supposition that efflux might be involved in the drug resistance of Riemerella anatipestifer isolates. Two broad-spectrum efflux pump inhibitors, carbonyl cyanide 3-chlorophenylhydrazone (CCCP) and Phe-Arg-β-naphthylamide (PAβN), on the contribution of minimum inhibitory concentrations of amikacin, streptomycin, chloramphenicol, tetracycline, ceftriaxone, ceftazidime, nalidixic acid, levofloxacin, enrofloxacin, as well as ciprofloxacin against 69 clinical R. anatipestifer isolates were investigated. We first reported that the two efflux pump inhibitors could restore the antimicrobial susceptibility of R. anatipestifer isolates. It is suggested that active efflux system is possible to be linked with the development of resistance in R. anatipestifer isolates. © 2016 Chinese Academy of Agricultural Sciences.
Wang S.,Institute of Special Animal and Plant science |
Wang S.,Yanbian University |
Zheng J.,Institute of Special Animal and Plant science |
Yang Y.,Institute of Special Animal and Plant science |
And 5 more authors.
Asian Journal of Animal Sciences | Year: 2014
The electrical fusion procedure used in Nuclear Transfer (NT) is one of the critical factors affecting the efficiency of animal cloning. The objective of this study was to compare the fusion competence of sika deer (Cervus nippon) and bovine interspecies nuclear transfer (iSCNT) in different electrical fusion parameters. The NT-embryos were obtained by transfer of the pedicle periosteum cell of deer at the 4th passage into the enucleated metaphase II (M II) bovine oocytes. As results shown, the percentage of couplets successfully fused at 2.4 kV cm-1 was the highest (57.2% vs 31.5, 41.0 and 45.7%, p<0.05). The percentage of couplets successfully and reconstructed embryos cleaved were the highest in 1 Direct Current (DC) pulse group but there were no significant difference among all groups (p>0.05). The percentage of couplets successfully fused in 10 μsec group (68.3%) was significantly higher than 40 μsec group (37.5%, p<0.05). The percentage of reconstructed embryos cleaved was 64.7% at 2 h group, it was higher than 3 h group (26.0%, p<0.05). These results suggested that electrical fusion procedure of 2.4 kV cm-1 EFS, 1 DC pulse, 10 μsec and 2 h after NT manipulation were feasible to iSCNT of sika deer-bovine. © 2014 Knowledgia Review, Malaysia.
Chen X.M.,Institute of Special Animal and Plant science |
Wei H.J.,Institute of Special Animal and Plant science |
Yang Y.F.,Institute of Special Animal and Plant science |
Xue H.L.,Institute of Special Animal and Plant science |
And 2 more authors.
Animal Reproduction Science | Year: 2015
The study was conducted to investigate the serum hormone concentrations and follicular dynamics present after synchronous treatment (CIDR) in female Jilin sika deer (. n=. 15) of estrous cycles. Blood samples were collected to analyze the FSH, LH, estradiol and progesterone during the estrous cycles. Manual transrectal ultrasonography examination was conducted at least thrice weekly to monitor the follicular wave. Ultrasonography showed that follicle development occurred in waves, and most estrous cycles in Jilin sika deer consist of one, two, or three waves. The largest follicles of the interwaves of two- and three-wave cycles were different (. P<. 0.05). The mean interovulatory interval was 15.0. ±. 4.6. d. There was a surge in circulating FSH in two- and three-wave cycles. The emergence of the largest follicle was related to the peak of serum concentration of estradiol. Serum progesterone concentrations were not different between one- and three-wave cycles (. P<. 0.05). We concluded that FSH and estradiol concentration may have an important role in controlling follicular development, that the estrous cycle in Jilin sika deer is characterized by one, two, or three waves of follicular development after synchronization. © 2015.
Wang C.W.,Institute of Special Animal and Plant science |
Ai J.,Institute of Special Animal and Plant science |
Fan S.T.,Institute of Special Animal and Plant science |
Lv H.Y.,Institute of Special Animal and Plant science |
And 3 more authors.
Plant Disease | Year: 2015
Kiwifruit (Actinidia arguta), one of the most recently domesticated fruit species, contains vitamins, phenolics, and carotenoids, and is grown mainly in China, Korea, Russia, and Japan (Matich et al. 2003). In October 2014, 5 to 10% ripe rot was observed in fruit stored at 4°C in Changchun City, Jilin Province, China. Within 15 to 20 days, symptoms appeared as soft, brown, slightly sunken, water-soaked lesions with abundant white-to-pink mycelium. The sections were surface-sterilized with 70% ethanol for 30 s and 0.1% HgCl2 for 1 min, triple rinsed with sterile water, dried on sterilized filter paper, plated on potato dextrose agar (PDA), and incubated 4 to 5 days at 25°C. A Fusarium species was consistently isolated and three single-spore cultures were characterized morphologically. These isolates grew slowly and formed abundant white aerial mycelium, then became floccose with rose pigmentation, and developed a brownish tinge in the center and grayish rose at the periphery on PDA. The ventral side of the colony was red to burgundy. Macroconidia formed in orange sporodochia, were broadly falcate with 3 to 5 septa, and 31.12 to 53.93 × 3.24 to 5.01 µm (n = 50). Microconidia were sparse, fusiform, or reniform, 0-to 1-septate, and 4.80 to 10.50 × 2.86 to 4.83 µm (n = 50). Chlamydospores were usually formed in chains. Morphological characteristics were consistent with those of Fusarium acuminatum (Leslie and Summerell 2006). The identity was further confirmed by sequencing rDNA internal transcribed spacer (ITS) region (Fogliata et al. 2013), translation elongation factor (TEF-1α), and beta-tubulin (TUB2) gene region (Wang et al. 2014). ITS sequence (513 bp, KP325408), TEF-1α sequence (683 bp, KP325409), and TUB2 sequence (1307 bp, KP325410) had 100% identity to F. acuminatum with 10 accessions (e.g., KJ737377), nine accessions (e.g., JX397866), and one accession (KJ396328), respectively. Pathogenicity tests were performed by spraying a 50-µl conidial suspension (1 × 106 conidia/ml) onto kiwifruit (cv. Kuilv). Five fruit were inoculated with each isolate and five fruit were sprayed with sterilized water as controls and maintained at 25°C and 90% relative humidity. The experiment was carried out three times. Within 10 to 14 days, all inoculated fruit developed the symptoms similar to those on diseased fruit, and no symptoms were observed on control fruit. The pathogen was successfully reisolated on PDA, exhibiting morphological characteristics identical to F. acuminatum, thereby completing Koch’s postulates. Although F. acuminatum has been previously reported as a ripe rot pathogen of A. deliciosa fruit in New Zealand (Pennycook 1985), this is the first report of F. acuminatum causing postharvest rots of A. arguta in China. Therefore, proper control measures should be implemented to prevent significant losses to quality and marketability of kiwifruit. © The American Phytopathological Society.