冬枣采后病害生物防治用拮抗酵母菌的筛选   总被引：2，自引：0，他引：2  

郭东起  赵萍  侯旭杰 《保鲜与加工》2011,11(6):6-9

从冬枣、冬枣叶片表面及冬枣伤口处分离到412株酵母菌,通过平板对峙法和活体筛选法筛选到1株酵母菌(菌株编号J),鉴定为美极梅奇酵母菌,该酵母菌在冬枣表面有很强的定殖能力,对冬枣采后贮藏中的主要致病菌(链格孢菌和橘青霉)表现出明显的拮抗效果,并能降低冬枣贮藏过程中的自然腐烂率,保持良好的贮藏品质。因此,美极梅奇酵母菌适合作为冬枣采后病害的生物防治用菌种资源。  相似文献   

矮生一品红苞片外植体组织培养技术研究   总被引：6，自引：3，他引：6  

任凝辉  武荣花  王献  宋志江  王宏伟 《河南农业大学学报》2001,35(3):239-240,248

以矮生一品红苞片为外植体进行再生组织培养 ,结果表明 ,愈伤组织诱导率和分化率受培养基中激素种类及浓度影响较大 ,高浓度的生长素与低浓度的细胞分裂素组合有利于诱导产生愈伤组织 适宜组合为MS +2 4-D 1～ 2mg·L-1+NAA 0 1mg·L-1+6 -BA 0 5mg·L-1 低浓度的生长素与高浓度的细胞分裂素组合有利于不定芽的分化 ,其最适培养基配方为MS +NAA 0 5mg·L-1+6 -BA 2 0mg·L-1  相似文献   

广西3种新记录外来入侵植物     

曾宪锋 《华南农业大学学报》2013,34(3):443-444

报道了采自防城港市的3种广西新记录外来入侵植物. 它们是紫斑大戟 Euphorbia hyssopifolia L.、翼茎阔苞菊 Pluchea sagittalis (Lam. ) Cabrera和丝毛雀稗 Paspalum urvillei Steud.. 标本存放于华南农业大学林学院植物标本室 (CANT).  相似文献   

植物狼毒大戟对钉螺及血吸虫毛蚴的影响     

王彬  赵红梅  卢昊 《安徽农学通报》2010,16(11):46-48

为了探讨植物狼毒大戟对钉螺及血吸虫毛蚴的影响,分别用大戟科大戟属狼毒大戟根的提取物1与提取物2液萃取物配制成的5.0,2.5,1.25,0.625,0.3125g/L的药液浸杀钉螺及血吸虫毛蚴,并测定了被浸杀钉螺体内糖原与蛋白质的含量,同时检测了该药对水生动物鱼的毒副作用。试验结果显示,狼毒大戟根水煮液在浓度为2.5g/L时经过24h,48h,72h浸杀钉螺的死亡率分别为：36.7%,66.7%,93.3%。而以70%乙醇提取液经过相同时间浸杀钉螺的死亡率分别为：43.3%,86.7%,96.7%。同时被狼毒大戟水煮液浸杀的钉螺体内糖原含量明显下降,减少幅度从9.61%到33.60%,表明狼毒大戟通过影响钉螺的能量代谢而抑制其生长。蛋白质的含量减少不显著。  相似文献   

Diterpenoid (poly)esters and a ring A-seco-phorboid from the aerial parts of Euphorbia macroclada Boiss     

Yalda Shokoohinia  Seyed-Ebrahim Sajjadi  Behzad Zolfaghari  Giuseppina Chianese  Giovanni Appendino  Orazio Taglialatela-Scafati 《Fitoterapia》2010

Euphorbia macroclada Boiss., a spurge endemic to the Iranian plateau, afforded four pre-myrsinane polyesters, three α-phorboids and one A-seco-phorboid, a type of compound so far unreported within natural products. All new compounds were structurally elucidated by spectroscopic methods, and especially 2D NMR measurements.  相似文献   

Anti-HBV active flavone glucosides from Euphorbia humifusa Willd.     

Ying Tian  Li-Min SunXi-Qiao Liu  Bin LiQiong Wang  Jun-Xing Dong 《Fitoterapia》2010

Thirteen flavone glucosides from the herb of Euphorbia humifusa were isolated and elucidated. Among them, five compounds including apigenin-7-O-β-d-glucopyranoside (2), apigenin-7-O-(6′′-O-galloyl)-β-d-glucopyranoside (3), luteolin-7-O-β-d-glucopyranoside (7), luteolin-7-O-(6′′-O-trans-feruloyl)-β-d-glucopyranoside (8) and luteolin-7-O-(6′′-O-coumaroyl)-β-d-glucopyranoside (9) showed anti-HBV activity in vitro. The structure–activity relationship showed that the parent structure was closely relevant to the anti-HBV activity of these compounds (agigenin > luteolin > quercetin). It was found that the number of glucoside in the structure may significantly influence their activities (flavone monoglucoside > flavone diglucoside) and cytotoxicity (flavone > flavone monoglucoside > flavone diglucoside). In addition, the substitution of acyl group on glucoside may be important to keep the anti-HBV activities of these compounds (galloyl > feruloyl > coumaroyl).  相似文献   

能源油料植物续随子的综合性状分析   总被引：5，自引：1，他引：4  

龚德勇  张燕  欧珍贵  支援  刘凡值 《贵州农业科学》2010,38(1)

以NX-08/1为对照,对收集引进的4个续随子品种(材料)的生物学、植株生长量、开花结实物候期、籽粒产量及种子含油率进行观测。结果表明:4个续随子品种(材料)平均株高分别达到114.2~127.6 cm,从高到矮依次为GF-08/2NX-08/7NX-08/3NX-08/2NX-08/1(CK);产量达到111.79~143.67 kg/667m2,NX-08/2NX-08/3GF-08/2NX-1(CK)NX-08/7;含油率达到40.6%~45.4%,从高到低依次为NX-1(CK)NX-08/3GF-08/2NX-08/2NX-08/7。从适应性看,4个续随子品种(材料)都可在贵州喀斯特山区进行选择推广。  相似文献   

一品红组织培养研究     

郭海滨  张天静  王晓雷 《甘肃农业科技》2011,(5):16-18

以茎段为外植体,研究了一品红组织培养技术,结果表明,用1 g/kg升汞溶液对一品红茎段消毒的最佳时长为7 min;适宜茎段愈伤组织诱导培养基为MS+2.0 mg/L 2,4-D+0.1 mg/L 6-BA.最适宜的增殖培养基为MS+1.0 mg/L 6-BA+0.1 mg/L NAA,繁殖系数达15;最佳生根培养基为1...  相似文献   

基于草地退化指示植物大狼毒的植被指数研究     

刘玉杰  封志明  邓福英 《草地学报》2014,22(3):455-460

为建立基于指示植物的滇西北地区草地退化遥感评价技术体系,将有毒植物大狼毒（Euphorbia jolkinii）作为草地退化的指示植物,筛选并构建了反映草地群落中大狼毒组分信息的植被指数。结果表明：部分特殊样地有可能放大GPS定位偏差对植被指数与地面调查指标相关性研究的不利影响,最好予以剔除。现有的植被指数与大狼毒调查指标的相关性略低于其与总体调查指标的相关性,不适合作为大狼毒的遥感监测指标。采用Landsat 5卫星第5波段影像校正后的植被指数与大狼毒调查指标的相关性增加,而与总体调查指标的相关性降低,在弱化样地总体群落信息、突出大狼毒组分信息方面GNDVIc表现最佳,较适用于草地群落中大狼毒组分的遥感监测。  相似文献   

Triterpenoids of Euphorbia kansuensis Proch     

Zhang BB  Han XL  Jiang Q  Liao ZX  Liu C  Qu YB 《Fitoterapia》2012,83(7):1242-1247

Phytochemical investigation of the ethanol extract of Euphorbia kansuensis Proch. led to the isolation of three new triterpenoids, along with ten known compounds. Their structures were established by extensive 1D and 2D NMR, as well as other spectrum analysis. Biological activities of the three new compounds against Hela cell, Hep-G2 cell, C. albicans ATCC10231 cell and SC5314 cell were evaluated. They showed strong anti-tumor and moderate anti-inflammatory activities with MIC values ranging from 13 to 25μg/ml and from 30 to 128μg/ml.  相似文献