Correlation between α-amylase gene expression and seedling vigor in rice

Summary This report examines the relationship between seedling vigor, -amylase enzyme activity and -amylase mRNA accumulation in ten varieties of rice (Oryza sativa L.) grown at two temperatures (15°C and 30°C). A significant, positive correlation was observed between seedling vigor, -amylase enzyme activity, and the accumulation of mRNA from one rice -amylase gene (RAmy1A) at both temperature regimens. The results of this study support previous experiments which have correlated -amylase enzyme activity to seedling vigor. We have extended this correlation to the expression of one of ten genes that comprise the rice -amylase multigene family. These results suggest that the expression of -amylase gene RAmy1A is an important, and possibly rate-limiting factor in determining seedling vigor in rice.     

斑节对虾真核生物翻译起始因子3亚基4（btseIF3g）序列分析及组织表达特性

通过mRNA差异显示(differential display,DD)技术筛选的差异片段,与斑节对虾(Penaeus monodon)混合组织cDNA文库中的EST进行拼接,获得斑节对虾真核生物翻译起始因子3亚基4(btseIF3g)的全序列(GenBank登录号:FJ829364).btseIF3g全长1 041 bp,由72 bp 5′非编码区、90 bp 3′非编码区以及879 bp的开放阅读框组成,推测编码一个长度为292个氨基酸的蛋白.经BLAST分析,btseIF3g C端含有一个RNA识别基序(RNA recognition motif,RRM)的保守结构域(E值为2.72e-25).利用氨基酸序列进行系统发育分析表明,btseIF3g与eIF3g属于同一分支.采用荧光定量PCR(Real-time PCR)方法对250日龄的雌、雄斑节对虾不同组织表达特性研究发现,btseIF3g在眼柄神经节、脑神经、肝胰腺、性腺和肌肉组织中均有表达,在卵巢中的相对表达量极显著(P<0.01)高于其他组织,这一结果提示eIF3g可能与斑节对虾卵巢发育相关.     

大豆新品种晋豆40号选育报告

晋豆40号是以晋豆19号为母本,汾豆21号为父本杂交选育而成的一个早熟、高产、优质大豆新品种,2009年通过山西省作物品种审定委员会审定.2007-2008年在山西省大豆早熟组区域试验中,折合平均产量2248.8 kg/hm2,比对照品种晋豆25号增产5.3%.该品种生育期85～96 d,籽粒含蛋白质40.61%,脂肪...     

pcDNA3.0-SV40T重组表达质粒的构建及鉴定

选用pGEM-SV40 T质粒经XhoI单酶切获得SV40 T基因片段,并将其插入pcDNA3.0载体,构建重组质粒pcDNA3.0-SV40 T,为建立永生化细胞系奠定基础。结果表明,经酶切鉴定证实,SV40T基因片段已经成功插入载体中。构建的SV40病毒T抗原重组质粒为利用SV40T抗原进行真核细胞研究提供了稳定、可靠的分子工具。     

Recent advances in the study of G protein-coupled receptor 40/free fatty acid receptor 1

Free fatty acids (FFAs) provide an important energy source and also act as signaling molecules. Medium to long-chain free fatty acids can activate the intracellular signal pathways in the pancreatic β-cells and play a role in regulating insulin secretion as an extracellular signal molecular via binding to the FFA receptor G protein-coupled receptor 40 (GPR40). Furthermore, GPR40 is associated with several biological effects including cell proliferation and antiapoptosis of nerve cells. GPR40 act an important role in the connection of obesity and diabetes or cancers. GPR40 will probably become a novel kind of antidiabetic and anticancer drugs.     

Effect of Blood Transfusion in Combination with Dextran-40 and Hypertonic Saline Solution on Cardiopulmonary Haemodynamics of Endotoxin (Lipopolysaccharide) Shock in Buffalo Calves

The intravenous (i.v.) infusion of lipopolysaccharide (LPS) of E. coli endotoxin in buffalo calves (n = 15) at 5 μg/kg bw per h for 3 h caused a significant (p<0.05) fall in plasma volume, blood volume, haematocrit haemoglobin, and systolic, diastolic and pulse pressure, mean arterial pressure and central venous pressure (CVP), with a marked rise in respiration. Treatment with a combination of i.v. infusion of 7.2% hypertonic saline solution, Plasmex-D-40 (Dextran-40) and blood successfully alleviated hypovolaemia, and raised systolic, diastolic and pulse pressure, mean arterial pressure and central venous pressure. The whole blood was collected from apparently healthy male buffalo calves 24 h prior to infusion and was transfused without cross-matching. No significant fall in haemoglobin, haematocrit and body temperature was observed after transfusion. All these values tended to remain near normal levels. However, this combination of treatment had no effect on high respiratory rate. A one-time blood transfusion did not evoke any cross-reaction and was helpful in raising haematocrit and haemoglobin close to pre-infusion values. The general symptoms of restlessness, respiratory distress, profuse salivation, violent movement of the ears, snoring, intermittent struggle, etc. were markedly reduced. All the treated animals became quiet and lay with eyes open and survived the 7 h of observation.     

40%氯虫苯甲酰胺·噻虫嗪水分散粒剂防治二化螟田间药效试验

通过田间试验研究不同药剂对二化螟防治效果、产量及用药成本的影响。结果表明,40%氯虫苯甲酰胺·噻虫嗪水分散粒剂10 g/667m2防治晚稻二化螟的效果明显高于常规用药15%阿维·三唑磷乳油100 mL/667m2,且40%氯虫苯甲酰胺·噻虫嗪水分散粒剂10 g/667m2能起到保护生态环境,减少农药用量、降低农药残留的作用。施药方法：于第3代二化螟卵孵盛期至2龄高峰前施药,可提高防效4.98%,每667 m2减少施药工本6元,增加产量31 kg,减少用药成本11元,667 m2增加总效益79.4元。     

半滑舌鳎 Gadd45g3 基因的克隆与表达分析

生长阻滞和DNA损伤诱生蛋白45(growth arrest and DNA damage inducible protein 45,Gadd45)基因在胚胎发育和性别决定中起重要作用。本研究通过RACE方法在半滑舌鳎(Cynoglossus semilaevis)中克隆得到了1个Gadd45g同源基因,命名为Gadd45g3。该基因全长1 147 bp,编码155个氨基酸残基。氨基酸序列分析表明,半滑舌鳎Gadd45g3与其他鱼类Gadd45g-like的同源性为79%~88%,与硬骨鱼和高等脊椎动物的Gadd45g同源性为58%~67%。对多个物种的Gadd45g同源基因的CDS区进行Ka/Ks分析,发现Ka/Ks均小于0.3。FISH结果显示,半滑舌鳎Gadd45g3基因位于常染色体上。实时荧光定量PCR结果显示,Gadd45g3在雌雄成鱼的脑中都有很高的表达,说明其参与了神经发育;在成熟性腺中,Gadd45g3的表达具有精巢特异性,说明Gadd45g3是性别相关基因;而在不同发育时期的性腺中,Gadd45g3的表达量在孵化后20 d的雄性仔鱼中显著高于同龄雌鱼(P0.05),但在孵化后95 d的雌雄仔鱼中均有高表达,说明在半滑舌鳎性别决定和性腺发育中起着重要作用。