Time filter

Source Type

Wang Y.,University of Sichuan | Gu R.,University of Sichuan | Chen H.,University of Sichuan | Shi H.,University of Sichuan | And 6 more authors.
Israel Journal of Plant Sciences | Year: 2015

The male sterility system shows tremendous value for the long-term utilization of hybrid crop breeding. In this study, a male sterile mutant, K305ms, was derived from the M3 progeny of maize (Zea mays L.) inbred line K305 exposed to 60Co-γ irradiation. Male sterile K305ms plants did not show any obvious differences from their sibling male fertile plants (K305F) during the vegetative stage, but failed to produce functional pollen at the reproductive stage. Microscopic observations determined that the dyads and tetrads from the pollen of K305ms plants developed abnormally, and subsequently the microspores were shriveled. Genetic analysis indicated that the male sterility of K305ms was controlled by a single recessive genic gene. Gene mapping showed that the responsible gene was located between two simple sequence repeat markers on chromosome 2L in a region of 10.3 cM, bnlg469b and bnlg1940, with genetic distances of 2.9 and 7.4 cM, respectively. According to the microscopic and mapping characteristics, our results showed that this gene was distinguishable from all other reported male sterile genes in maize, and it is temporarily designated as ms305. The linkage map in this study will provide a useful fundamental basis for molecular marker-assisted selection as well as for further map-based cloning of ms305. © 2015 2015 Taylor © Francis.

Long F.,Sichuan University | Long F.,Key Laboratory of Bio resources and Eco environment | Li S.,Sichuan University | Li S.,State Key Laboratory of Hydraulics and Mountain River Engineering | And 3 more authors.
Journal of Mountain Science | Year: 2012

Field pull-out and laboratory tests were applied to investigate the effect of metal bolts and wire netting on plant root distribution and anchorage characteristics of 9-year-old Vitex negundo L. growing on a weakly weathered rocky slope (38°). Root number, length and diameter were recorded and single root specimens were classified and tested for tensile strength. The results show that root anchorage is different between the two constructions by bolts and wire. Under limited soil condition, root anchorage ability is 80% lower than when there is sufficient soil due to the reduction of the diameter and number of all second-order lateral roots, as well as the reduction of the tensile strength of the embedded second-order and first-order lateral roots on limited soil. We conclude that the distribution and anchorage of Vitex negundo L. is affected by limited soil availability on rocky slopes. © 2012 Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg.

Shi Z.,Key Laboratory of Bio resources and Eco environment | Shi Z.,Guizhou Normal University | Chen J.,Sichuan Academy of Medical Science | Li C.-Y.,Key Laboratory of Bio resources and Eco environment | And 5 more authors.
Acta Pharmacologica Sinica | Year: 2014

Aim: Proteins with legume lectin domains are known to possess a wide range of biological functions. Here, the antitumor effects of two representative legume lectins, concanavalin A (ConA) and Sophora flavescens lectin (SFL), on human breast carcinoma cells were investigated in vitro and in vivo.Methods:Human breast carcinoma MCF-7 cells and human normal mammary epithelial MCF-10A cells were examined. Cell viability was detected using WST-1 and CCK-8 assays. Cell apoptosis was analyzed with Hoechst 33258 staining. Cell cycle was investigated using flow cytometry. The expression of relevant proteins was measured using Western blotting. Breast carcinoma MCF-7 bearing nude mice were used to study the antitumor effects in vivo. The mice were injected with ConA (40 mg/kg, ip) and SFL (55 mg/kg, ip) daily for 14 d.Results:ConA and SFL inhibited the growth of MCF-7 cells in dose- and time-dependent manners (IC 50 values were 15 and 20 μg/mL, respectively). Both ConA and SFL induced apoptotic morphology in MCF-7 cells without affecting MCF-10A cells. ConA and SFL dose-dependently increased the sub-G 1 proportion in MCF-7 cells, while SFL also triggered the G 2 /M phase cell cycle arrest. Both ConA and SFL dose-dependently increased the activities of caspase-3 and caspase-9 and release of cytochrome C from mitochondria into cytoplasm, up-regulated Bax and Bid, and down-regulated Bcl-2 and Bcl-X L in MCF-7 cells. ConA reduced NF-κB, ERK, and JNK levels, and increased p53 and p21 levels, while SFL caused similar changes in NF-κB, ERK, p53, and p21 levels, but did not affect JNK expression. Administration of ConA and SFL significantly decreased the subcutaneous tumor mass volume and weight in MCF-7 bearing nude mice.Conclusion:ConA and SFL exert anti-tumor actions against human breast carcinoma MCF-7 cells both in vitro and in vivo.

Liu M.,Key Laboratory of Bio resources and Eco environment | Kang C.,Key Laboratory of Bio resources and Eco environment | Yan C.,Key Laboratory of Bio resources and Eco environment | Huang T.,Key Laboratory of Bio resources and Eco environment | And 4 more authors.
Mitochondrial DNA | Year: 2016

The Black Stork, Ciconia nigra belongs to family Ciconiidae, which is evaluated as Least Concern by IUCN. In this study, the complete mitochondrial genome of C. nigra was first sequenced and characterized, which was 17,795 bp in length. The mt-genome has tandem repeats of 80 bp and 78 bp repeat units, and AAACAAC and AAACAAACAAC tandem repeats in D-loop region. It is notable that a single extra base "C" at position 174 was inserted in gene ND3. Bayesian inference, maximum likelihood methods were used to construct phylogenetic trees based on 12 heavy-strand protein-coding genes. Phylogenetic analyses showed that Ardeidae diverged earlier than Ciconiidae, Cathartida and Threskiornithidae, and Ciconiidae had closest relationship to Cathartida. C. nigra diverged first among three Ciconia birds. © 2014 Informa UK Ltd.

Zhang X.,Sichuan University | Zhang X.,Bio resource Research and Utilization Joint Key Laboratory of Sichuan and Chongqing | Zhang X.,Key Laboratory of Bio resources and Eco environment | Ding M.,Sichuan University | And 11 more authors.
Systems Biology in Reproductive Medicine | Year: 2015

Four genes involved in DNA double-strand break repair and chromosome synapsis, i.e., testis expressed gene 11 (TEX11), testis expressed gene 15 (TEX15), mutL homolog 1 (MLH1), and homolog 3 (MLH3), play critical roles in genome integrity, meiotic recombination, and gametogenesis. We explored the possible association between single nucleotide polymorphisms (SNPs) in these genes and idiopathic male infertility involving azoospermia or oligozoospermia. A total of 614 fertile control and infertile men were recruited to this study in Sichuan, China. The latter group included 244 men with azoospermia and 72 men with oligozoospermia. Six SNPs in the TEX11, TEX15, MLH1, and MLH3 genes were investigated in both patients and controls by sequencing. The frequency distributions of SNPs rs6525433, rs175080, rs6525433-rs4844247, and rs1800734-rs175080 were found to be significantly different between patients and control groups (p<0.05), while rs4844247, rs323344, rs323346, and rs1800734 showed no significant difference between the two cohorts. Thus, the SNPs TEX11 rs6525433, MLH3 rs175080, rs6525433-rs4844247, and rs1800734-rs175080 might be associated with male infertility. © 2015 Informa Healthcare USA, Inc. All rights reserved.

Discover hidden collaborations