茶树新品种‘佛香3号’

 ‘佛香3号’是利用‘福鼎大白茶’ ( ♀) ב长叶白毫’ ( ♂) 人工授粉杂交, 从F1 中单株选育而成, 为高香、优质、高产、抗逆性强, 适制绿茶的新品种。绿茶外形满披银毫, 香气高长, 滋味鲜醇, 叶底黄绿明亮; 优质干茶产量2 371.2 kg·hm^-2, 适宜在云南大叶茶区推广种植。     

Projections of temperature extremes based on preferred CMIP5 models:a case study in the Kaidu-Kongqi River basin in Northwest China

The extreme temperature has more outstanding impact on ecology and water resources in arid regions than the average temperature. Using the downscaled daily temperature data from 21 Coupled Model Inter-comparison Project(CMIP) models of NASA Earth Exchange Global Daily Downscaled Projections(NEX-GDDP) and the observation data, this paper analyzed the changes in temporal and spatiotemporal variation of temperature extremes, i.e., the maximum temperature(Tmax) and minimum temperature(Tmin), in the Kaidu-Kongqi River basin in Northwest China over the period 2020–2050 based on the evaluation of preferred Multi-Model Ensemble(MME). Results showed that the Partial Least Square ensemble mean participated by Preferred Models(PM-PLS) was better representing the temporal change and spatial distribution of temperature extremes during 1961–2005 and was chosen to project the future change. In 2020–2050, the increasing rate of Tmax(Tmin) under RCP(Representative Concentration Pathway) 8.5 will be 2.0(1.6) times that under RCP4.5, and that of Tmin will be larger than that of Tmax under each corresponding RCP. Tmin will keep contributing more to global warming than Tmax. The spatial distribution characteristics of Tmax and Tmin under the two RCPs will overall the same; but compared to the baseline period(1986–2005), the increments of Tmax and Tmin in plain area will be larger than those in mountainous area. With the emission concentration increased, however, the response of Tmax in mountainous area will be more sensitive than that in plain area, and that of Tmin will be equivalently sensitive in mountainous area and plain area. The impacts induced by Tmin will be universal and farreaching. Results of spatiotemporal variation of temperature extremes indicate that large increases in the magnitude of warming in the basin may occur in the future. The projections can provide the scientific basis for water and land plan management and disaster prevention and mitigation in the inland river basin.     

适宜黄绿木霉T1010生长培养料筛选

木霉广泛存在于土壤、根际及其它基质中,对植物土传病原真菌具有拮抗作用。扩大生防因子黄绿木霉(Trichoderma aureoviride)T1010培养料范围是利用生产地资源扩大生产、大面积应用的前提。本试验通过测定黄绿木霉T1010的菌丝生长和分生孢子生长,黄绿木霉T1010在固体基本培养基上生长,最佳碳源为淀粉;优化了培养条件,确定最适宜种子培养用PD培养基,摇瓶培养,生长时间3d后,菌丝生长量为5.75g/ml;最经济适宜扩大培养基为玉米15g/L,豆粉5g/L,摇瓶培养3d后,菌丝生长量为5.83g/ml;最适宜的、经济的固体发酵培养基为麦麸∶醋渣∶水=2∶1∶3.3,发酵产物孢子量为2.46×1010cfu/g。本文研究确定黄绿木霉T1010腐解培养料的能力为多方面扩大生产黄绿木霉制剂提供了科学依据。     

不同沼液灌溉量对西瓜产量及土壤环境的影响

对规模养殖场沼液灌溉西瓜进行田间试验,结果表明,不同沼液灌溉量处理与常规施用化肥的对照处理相比,对土壤质量基本无影响,用大量沼液浇灌替代化肥使用,对西瓜产量基本无影响,合理施用沼液进行农田灌溉不仅可以减轻规模养殖场污水处理的排放压力,还可以减少化肥施用量,提高西瓜的品质。     

2种方法在荒漠草原植物种群分布格局中的适用性比较

研究首次比较了2种方法在测定荒漠草原6种植物种群分布格局中的适用性.结果表明,方差均值比率法及聚集强度指数法中的多个指数都适合于这6种植物分布格局的计算.但其中的聚块性指数法的运算难度较大,宜慎用.比较结果这6种植物种群皆为聚集分布,但聚集程度有所差别.     

扬州城市道路部分绿化树种滞尘效应研究

以扬州市城区干道绿化树种为试材,研究了滞尘指标以及树种、地段、季节因素等对叶面滞尘效应评价的影响。结果表明:叶片滞尘量测定值在一定程度上可以反映客观环境空气中的颗粒物含量,以文昌路的最大、校园次之、公园最小,其与采样地点的影响密切相关;常绿灌木的叶片滞尘量较大,则表现为对地面粉尘的拦截能力强。因受树种单叶面积大小、树冠密集度、整株叶量多少和叶片组织结构等制约,各滞尘量指标间不尽一致。乔木树种中:单叶滞尘量(mg)与单位面积滞尘量(g/m2)反映一致,为广玉兰悬铃木银杏枫杨女贞香樟,干重滞尘量(mg/g)变化较大,为枫杨银杏悬铃木广玉兰女贞香樟;综合各项指标比较,以落叶树种的滞尘能力占优势,仅广玉兰的单位面积滞尘量表现最高。灌木树种中:单叶滞尘量(mg)、干重滞尘量(mg/g)均以珊瑚树最大,而单位面积滞尘量(g/m2)以小叶黄杨最大。叶片滞尘量的季节性变化与秸秆焚烧等大气污染的动态变化具有明显的相关性,其中:广玉兰以5月值最高,余皆以10月值最高。     

茄子单性结实差异表达序列鉴定及分析

利用实时荧光定量PCR技术,研究茄子单性结实SSH-c DNA文库中的96条EST序列在单性结实自交系和非单性结实自交系果实发育过程中的表达模式。分析表明,在低温条件下,相对表达量有显著差异的EST序列有31条,总体上调表达的EST序列有17条,总体下调表达的EST序列有14条。通过NCBI对EST序列进行Blastx比对,得到与其同源性高的序列信息。其中5条EST与抵御低温相关,6条EST与植物激素代谢相关,多条EST与植物代谢过程中的蛋白质和碳水化合物合成相关,1条EST无比对结果,可能为新基因。差异表达序列可作为研究茄子单性结实和耐低温的候选基因。     

Shikonin inhibits neuronal apoptosis induced by OGD through targeting PI3K/Akt signaling pathway

AIM: To explore the effect of shikonin on rat primary cortical neurons in oxygen-glucose deprivation (OGD)-induced injury model.METHODS: The neurons were pretreated with shikonin at different concentrations (0.02, 0.2, 2 and 20 μmol/L) followed by treatment with OGD. Lactate dehydrogenase (LDH) release assay and fluorescein diacetate/propidium iodide (FDA/PI) double staining were used to detect neuronal viability and apoptosis, and then the optimal concentration of shikonin was determined. LY294002 (PI3K/Akt signaling pathway inhibitor, 1 μmol/L) was added before the addition of shikonin, and the protein level of p-Akt (Ser473) in the neurons was determined by Wes-tern blot. LDH release assay and FDA/PI double staining were also used to detect neuronal viability and apoptosis.RESULTS: A certain concentration (0.2~20 μmol/L) of shikonin increased the viability of impaired neurons (P<0.05) and the protein level of p-Akt (Ser473) in the neurons (P<0.05). The effect of shikonin on neuronal p-Akt (Ser473) levels and the cell death were blocked by LY294002 (P<0.05).CONCLUSION: A certain concentration of shikonin reduces OGD-induced apoptosis of rat primary cortical neurons by activating PI3K/Akt signaling pathway.     

维生素D3对黄羽肉种鸡生殖性状及其后代肉鸡生长性能、免疫器官发育、胫骨性状和肉品质的影响

本试验旨在研究维生素D3对黄羽肉种鸡生殖性状及其后代肉鸡生长性能、免疫器官发育、胫骨性状和肉品质的作用.选用720只岭南黄羽肉种母鸡(快大型,46周龄),根据体重和产蛋率一致原则随机分为6个组,分别饲喂在基础饲粮中添加0、800、1600、2400、3200和4000 IU/kg维生素D3的饲粮,每组6个重复,每个重复...     

环状RNA及其在生殖发育中的研究进展

环状RNA(circular RNA, circ-RNA)是一类由初始转录RNA反向剪接,形成的闭合环状RNA分子,广泛存在于真核细胞中。因不受RNA外切酶切割,所以稳定存在时间长。主要通过海绵吸附作用竞争性结合miRNA调节基因表达。circ-RNA分子鉴定及其生理调控作用成为近几年生命科学领域的研究热点,本文从circ-RNA的生成过程、在早期胚胎发育调控以及配子发育过程中的数量和作用等方面进行了综述。