麦收前复种毛叶苕子技术模式的比较研究     

李建忠  周喜平  胡喜云  仲生柱  靳存旺  温晓亮  高宇  任永峰 《安徽农业科学》2017,45(7)

[目的]对麦收前复种毛叶苕子技术模式进行比较研究。[方法]介绍了麦收前复种毛叶苕子技术模式。在经济效益方面,将该模式与单种1季小麦模式进行了比较;分析了该模式的社会、生态效益,并预测了其应用前景。[结果]与单种1季小麦模式相比,麦前复种毛叶苕子技术模式收益率增加94.6%;该模式提高了土壤肥力和农田经济效益,缓解了饲草料缺乏,具有广阔的应用前景。[结论]该研究为麦收前复种毛叶苕子技术模式的推广提供了理论依据。  相似文献   

黄淮冬麦区气象因子与小麦晚霜冻害关系研究——以商丘市为例   总被引：1，自引：0，他引：1  

刘红杰  武永峰  任德超  倪永静  胡新 《中国农业气象》2017,(8):517-525

基于1956-2015年商丘市气象数据和霜冻害资料,研究黄淮冬麦区商丘市气象因子与霜冻害的关系,以及气温、地温、相对湿度、风速与草面温度的偏相关和多元线性回归关系。结果表明:随着全球气温变暖,商丘市冬春季积温以4.35℃·d·a~(-1)的速率逐年增加;晚霜冻害除受冷空气活动影响外,与前期积温和降水量密切相关,冬春季积温偏高或降水量偏少的情况下易发生晚霜冻害;随着小麦幼穗的发育,其对低温的敏感度增加,且可引起霜冻害的最低温度有逐渐升高的趋势;气温、地表温度、平均相对湿度、平均风速与草面温度呈极显著相关(P0.01),偏相关系数的大小表现为地表温度气温平均相对湿度平均风速,可见,除气温、地表温度外,平均相对湿度、平均风速也对霜冻害的发生及轻重程度起关键作用;各因子与草面温度可用模型表述为Y=0.558ST+0.482AT+0.087RH+1.304WS-12.704,经检验,线性回归方程成立,可通过该模型对草面温度进行监测,并为未安装草面温度传感器的地区提供可靠的冻害评估结果。  相似文献   

多抗性番茄新品种杭杂400的选育     

郑积荣  王慧俐  王佳明 《中国蔬菜》2010,1(16):89-92

杭杂400是以T06-2为母本,以9905-2-1-1-1-1为父本配制而成的中早熟番茄一代杂种。无限生长类型,50 %的植株有长而密的白色茸毛,50 %为普通植株;第1花序着生于第7～8节,成熟果大红色,无绿果肩,单果质量207.6 g,果实硬度1.05 kg·cm^-2,较耐贮运;品质佳,风味好,VC含量387.0 mg·kg^-1,可溶性固形物7.68 %,总糖3.45 %,可滴定酸0.425 %;耐高温、耐寒和耐涝性均好,高抗烟草花叶病毒病和叶霉病,抗黄瓜花叶病毒病,中抗青枯病;茸毛株对蚜虫、烟粉虱和美洲斑潜蝇具有较好的避虫效果;春大棚栽培每667 m²产量5 500 kg左右,适宜于设施和露地栽培。  相似文献   

A review and meta‐analysis of growth and life‐history traits of a declining European freshwater fish,crucian carp Carassius carassius          下载免费PDF全文

Ali Serhan Tarkan  David Almeida  Michael J. Godard  Özcan Gaygusuz  Mark Rylands  Carl D. Sayer  Grzegorz Zięba  Gordon H. Copp 《水产资源保护:海洋与淡水生态系统》2016,26(1):212-224

Effects of sodium valproate on RPMI8226 and U266 cell proliferation and IL-6/JAK/STAT signaling pathway     

MA Yong-yong  ZHOU Shu-juan  GE Hang-ping  CAI Fang-fang  ZHANG Yu  YU Kang 《园艺学报》2013,29(5):833-838

AIM: To investigate the effects of sodium valproate (VPA) on the proliferation of multiple myeloma cell lines RPMI8226 and U266 and the regulation of IL-6/JAK/STAT signaling pathway. METHODS: The cells were treated with different concentrations of VPA for 12 h and 24 h. The growth of RPMI8226 cells and U266 cells was detected by MTT assay. Apoptotic rates and cell cycle were analyzed by flow cytometry. The mRNA expression of STAT3, STAT5 and STAT target genes Bcl-xL, Mcl-1, c-Myc, CCND1 and VEGF was measured by RT-PCR. Western blotting analysis was used to determine the total proteins and protein phosphorylation levels of JAK2 and STAT5. RESULTS: VPA inhibited the growth and induced the apoptosis of RPMI8226 cells and U266 cells in a concentration- and time-dependent manner. The levels of IL-6 in the culture supernatants of RPMI8226 cells and U266 cells treated with VPA were significantly higher than that in negative control group. VPA down-regulated the mRNA expression of STAT3, STAT5, Bcl-xL, Mcl-1, c-Myc, CCND1 and VEGF. After treated with VPA, the protein levels of p-JAK2, JAK2, p-STAT5 and STAT5 in RPMI8226 cells and U266 cells were significantly lower than those in control group. CONCLUSION: VPA inhibits the proliferation of PRMI8226 cells and U266 cells in vitro. The modulation of IL-6/JAK/STAT signaling pathway may be involved in its potential mechanisms.  相似文献   

IQGAP1 is overexpressed and interacts with ERK in human myeloma cells     

MA Yong-yong  HUANG Jin  ZHOU Shu-juan  GE Hang-ping  YU Kang 《园艺学报》2013,29(12):2179-2185

AIM:To explore the role of IQ motif-containing GTPase-activating protein 1 (IQGAP1) in the cell proliferation of multiple myeloma and its mechanism. METHODS:RT-PCR and Western blotting were performed to detect the expression of IQGAP1 in human myeloma cell lines RPMI8226 and U266. shRNA-expressing plasmids were used to transfect into RPMI8226 cells to knock down the expression of IQGAP1. MTT assay was used to examine the proliferation of RPMI8226-shIQGAP1 (clone 1) cells, RPMI8226-shRNA negative control cells and un-transfected RPMI8226 cells with or without VEGF/IL-6 treatment. The protein levels of p-ERK1/2, ERK1/2, AKT, p-AKT, STAT3 and p-STAT3 in RPMI8226-shIQGAP1 (clone 1) cells, RPMI8226-shRNA negative control cells and un-transfected RPMI8226 cells were measured by Western blotting. The interaction between IQGAP1 and ERK was determined by the method of co-immunoprecipitation. RESULTS:IQGAP1 was overexpressed in human myeloma cell lines RPMI8226 and U266 as compared with normal lymphocytes. Transfection with shRNA targeting to IQGAP1 decreased the expression levels of IQGAP1 in RPMI8226 cells. The proliferation of RPMI8226 cells decreased when IQGAP1 was knocked down by shRNA with or without VEGF/IL-6 treatment. IQGAP1 affected the proliferation of RPMI8226 cells by regulation of MAP kinase (ERK1/2) pathway. The level of p-ERK1/2 in RPMI8226-shIQGAP1 (clone 1) cells decreased by 70.2% as compared with RPMI8226-shRNA negative control cells and un-transfected RPMI8226 cells. The interaction between IQGAP1 and ERK in RPMI8226 cells was observed. CONCLUSION: IQGAP1 plays an important role in the cell proliferation of multiple myeloma via MAP kinase (ERK) pathway.  相似文献   

鸡腿葱新品种新葱5 号的选育     

张国进  王文洁  段风华  任福森 《中国蔬菜》2013,1(12):104-106

新葱5 号是采用多亲本、多重杂交技术,综合众多亲本的优良性状,经多年系统选育出的大葱新品种。株高95～100 cm,葱白长35～40 cm,底茎粗6～7 cm,中茎粗2.5～3.0 cm,叶片深绿色,生长期功能叶6～8 片,平均每667 m ² 产量5 000 kg,适合河南、河北、山西、山东等地种植。  相似文献   

Phylogenetic reassessment of Mycosphaerella spp. and their anamorphs occurring on Eucalyptus. II.     

《Studies in Mycology》2006

Species of Eucalyptus are widely planted as exotics in the tropics and Southern Hemisphere and to some extent in southern Europe, for timber and fibre production. Species of Mycosphaerella are commonly associated with leaves and twigs of Eucalyptus and can result in defoliation, dieback, and even tree death. In the present study, numerous isolates of Mycosphaerella species were collected from leaf litter, living leaves exhibiting leaf spot symptoms or severe Mycosphaerella leaf blotch symptoms. Isolates were compared based on DNA sequence data for the internal transcribed spacer region (ITS1 & ITS2) and the 5.8S gene. These data, together with characteristics of the fungal growth on three different media, morphology of the anamorph and teleomorph structures as well as ascospore germination patterns were used to describe 21 new species.Taxonomic novelties: Colletogloeopsis stellenboschiana Crous sp. nov., Mycosphaerella davisoniellae Crous sp. nov. (anamorph Davisoniella eucalypti H.J. Swart), Mycosphaerella eucalyptorum Crous & M.J. Wingf. sp. nov. Mycosphaerella gamsii Crous sp. nov., Mycosphaerella perpendicularis Crous& M.J. Wingf. sp. nov., Mycosphaerella pluritubularis Crous & J.P. Mansilla sp. nov., Mycosphaerella pseudafricana Crous & T. Coutinho sp. nov., Mycosphaerella pseudocryptica Crous sp. nov. (anamorph Colletogloeopsis sp.), Mycosphaerella pseudoendophytica Crous & G. Hunter sp. nov. (anamorph Pseudocercosporella sp.), Mycosphaerella pseudosuberosa Crous & M.J. Wingf. sp. nov. (anamorph Trimmatostroma sp.), Mycosphaerella quasicercospora Crous & T. Coutinho sp. nov., Mycosphaerella scytalidii Crous & M.J. Wingf. sp. nov. (anamorph Stenella sp., synanamorph, Scytalidium-like.), Mycosphaerella secundaria Crous & A.C. Alfenas sp. nov., Mycosphaerella stramenti Crous & A.C. Alfenas sp. nov., Mycosphaerella stramenticola Crous & A.C. Alfenas sp. nov., Mycosphaerella sumatrensis Crous & M.J. Wingf. sp. nov., Mycosphaerella verrucosiafricana Crous & M.J. Wingf. sp. nov., Septoria eucalyptorum Crous sp. nov., Septoria provencialis Crous sp. nov., Stenella pseudoparkii Crous & M.J. Wingf. sp. nov. (teleomorph Mycosphaerella sp.), Stenella xenoparkii Crous & M.J. Wingf., sp. nov. (teleomorph Mycosphaerella sp.).  相似文献   

Re-evaluating the taxonomic status of Phaeoisariopsis griseola,the causal agent of angular leaf spot of bean     

《Studies in Mycology》2006

Angular leaf spot of Phaseolus vulgaris is a serious disease caused by Phaeoisariopsis griseola, in which two major gene pools occur, namely Andean and Middle-American. Sequence analysis of the SSU region of nrDNA revealed the genus Phaeoisariopsis to be indistinguishable from other hyphomycete anamorph genera associated with Mycosphaerella, namely Pseudocercospora and Stigmina. A new combination is therefore proposed in the genus Pseudocercospora, a name to be conserved over Phaeoisariopsis and Stigmina. Further comparisons by means of morphology, cultural characteristics, and DNA sequence analysis of the ITS, calmodulin, and actin gene regions delineated two groups within P. griseola, which are recognised as two formae, namely f. griseola and f. mesoamericana.Taxonomic novelties: Pseudocercospora griseola (Sacc.) Crous & U. Braun comb. nov., P. griseola f. mesoamericana Crous & U. Braun f. nov.  相似文献   

Respiratory Complications in Critical Illness of Small Animals     

Vicki Lynne Campbell 《Veterinary Clinics of North America: Small Animal Practice》2011,41(4):709-716

  相似文献