福建野牡丹科一新记录种——短葶无距花(英文)     

兰思仁  彭东辉  张启翔  林建勇 《福建农林大学学报(自然科学版)》2011,40(5)

报道了福建野牡丹科(Melastomataceae)植物一新纪录种短葶无距花(Fordiophyton breviscapum(C.Chen)Y.F.Deng&T.L.),该种仅在广东省和湖南省有过报道.本文提供了该种的形态描述及照片,引证标本存放于福建农林大学标本馆.  相似文献   

肉苁蓉对感染性休克肝线粒体功能影响的实验研究     

尹刚  王志强 《长江大学学报》2005,2(3):1-3,i001

目的:研究肉苁蓉对感染性休克肝线粒体功能的影响,探讨肉苁蓉在细胞水平治疗感染性休克的机制.方法:40只SD大鼠随机分为5组:假手术组,12 h对照组,12 h给药组,16 h对照组和16 h给药组.采用盲肠结扎穿孔术(CLP)复制感染性休克模型,比较各组存活率和平均动脉压(MAP),肝线粒体ATP酶活性,呼吸控制率(RCR),ADP/O比值的变化.结果:大鼠在复制感染性休克模型后,肝线粒体ATP酶活性,呼吸控制率和ADP/O比值显著降低,24 h存活率明显下降.给药组肝线粒体ATP酶活性,呼吸控制率(RCR)和ADP/O比值较对照组明显改善(P＜0.05),与大鼠死亡率的降低呈明显正相关.结论:肉苁蓉能增强线粒体摄氧功能和氧化磷酸化功能,恢复感染性休克线粒体的正常的能量代谢功能.  相似文献   

氮肥水平对Y两优585稻米品质的影响   总被引：1，自引：0，他引：1  

张上都  伍祥  涂敏  石邦志  周乐良  陈文强 《贵州农业科学》2014,(11)

为探索不同氮肥施用量对稻米品质的影响,为水稻生产中氮肥的合理利用提供依据,采用4种施氮水平（无氮0 kg/hm2、低氮150 kg/hm2、中氮225 kg/hm2和高氮300 kg/hm2）研究 Y 两优585稻米品质指标的差异及其食味品质的变化规律。结果表明：1）碾米品质,高氮肥施用量（300 kg/hm2）可以提高产量,增加稻米出糙率、精米率和整精米率。2）外观品质,4种氮肥处理的粒长（7．1 mm）、长宽比（3∶1）和透明度（1级）无差异;无氮（0）处理的垩白粒率和垩白度高于其余施氮处理;施氮处理的垩白粒率和垩白度表现为中氮＞高氮＞低氮。3）蒸煮品质,碱消值为低氮＞无氮＞高氮＞中氮,胶稠度和直链淀粉含量随着施氮量的增加而下降。4）营养品质,蛋白质含量随着施氮量的增加而升高（7．5％～10．4％）。  相似文献   

新疆橐吾属（Ligularia　Cass）新种     

杨昌友  耿世磊 《新疆农业大学学报》1995,(2)

本文报道新疆橐吾属２新种，即新疆橐吾Ｌｉｇｕｌａｒｉａ　Ｘｉｎ　ｊｉａｎｇ　ｅｎｓｉｓ　Ｃ．Ｙ．Ｙａｎｇ　ｅｔ　Ｓ．Ｌ．Ｋｅｎｇ和天山橐吾Ｌｉｇｕｌａｒｉａ　ｔｉａｎｓｃｈａｎｉｃａ　Ｃ．Ｙ．ＹａｎｇｅｔＳ．Ｌ．Ｋｅｎｇ。  相似文献   

烟草感染马铃薯Y病毒脉坏死株系后PPO活性及其同工酶变化的研究   总被引：5，自引：0，他引：5  

刘才艺  吴元华 《华中农业大学学报》2000,19(4):328-330

感染马铃薯Ｙ病毒脉坏死株系（ＰＶＹ＾Ｎ）后,敏感烟草体内的多酚氧化酶（ＰＰＯ）活性升高,而抗性烟草的ＰＰＯ活性降低,但其活性值均高于敏感烟草健康植株;敏感烟草从接种ＰＶＹ＾Ｎ后第８ｄ起出现２条新的ＰＰＯ同工酶谱带,而且随着病害程度的加重其强度增加,抗性烟草则没有新的ＰＰＯ同工酶谱带出现,在未接种的情况下,抗性烟草体内的ＰＰＯ活性明显高于敏感烟草,其ＰＰＯ同工酶谱带数比敏感烟草多１条。  相似文献   

余甘子精粉的体外抗氧化活性分析          下载免费PDF全文

李娴  甘瑾  张雯雯  侯彬  张弘  冯颖 《林业科学研究》2015,28(5):753-757

The antioxidant activities in vitro of refined powder of Phyllanthus emblica L. were detected by methods based on chemical measurement and cell modeling. The results of anti-peroxidation ability and iron reduction ability trials showed that the refined powder of P. emblica L. had strong ability of anti-peroxidation, and it increased with the increasing of concentration with a clear dose-response relationship. When the concentration reached 800 μg·mL^-1, the ability of anti-peroxidation was almost equal to the positive control VC with the same concentration. Meanwhile, it also had iron reduction ability that accompanied by significant dose-response relationship. By in vitro cell culture method, H₂O₂ was used to induce SH-SY5Y cells damages to establish the cell model of oxidative damage. The author detected the effect of different concentrations of powder on cell survival rate for the model cells by MTT assay. The results indicated that refined powder could show better protective effect to oxidative damaged SH-SY5Y cells in the range of 600 1 200 μg·mL^-1. When the concentration reached 1 200 μg·mL^-1, the cell survival rate was the highest and refined powder exhibited the best antioxidant activity. Both methods proved the strong antioxidant activities of refined powder of P. emblica L. in vitro.  相似文献   

小叶黑柴胡研究综述   总被引：5，自引：2，他引：3  

彭云霞  张东佳  蔺海明 《甘肃农业科技》2016,(2):61-65

从品种鉴别、生物学特性、种植栽培研究等方面,对小黑叶柴胡的相关研究进展进行了综述,并展望了利用前景。  相似文献   

笼养川金丝猴哺乳行为的观察   总被引：5，自引：0，他引：5  

杨晓军 《甘肃农业大学学报》1996,31(4):334-338

采用全事件抽样法对笼养的５只成年雌猴和３只幼猴进行了连续１３个月计１８３ｄ的行为观察。结果表明，川金丝猴的初次哺乳是在胎儿娩出后３．１ｈ以后；根据哺乳的行为特征，哺乳期可分为初期、中期、晚期和后期；哺乳分为３种类型，即生理性哺乳、过渡性哺乳和心理性哺乳；哺乳时同笼母猴对幼猴有阿姨行为。  相似文献   

秋水仙素处理对益母草种子生理生化的影响     

徐丽珊  黄帼 《种子》2003,(1):21-22

研究了秋水仙素处理对益母草种子生物生化变化的影响。方法：以益母草种子为材料，观察了不同程度秋水仙素处理后，酯酶同工酶、过氧化物酶同工酶、发芽、生长情况等的变化。结果：与对照相比，发现各种程度秋水仙素处理的益母草种子，过氧化物酶同工酶带无明显变化；用0．05％－0．5％浓度秋水仙素分别处理益母草种子，酯酶同工酶谱带有增多的现象；并且用不同浓度秋水仙素处理12h后，发现用0．2％浓度处理的种子生长较好。结论：说明一定程度秋水仙素处理就改变益母草种子中酶数量；用0．2％浓度的秋水仙素处理最有利于提高益母草的产量。  相似文献   

Kazakhstani native cattle reveal highly divergent mtDNA from Bos taurus and Bos indicus lineages with an absence of Bos indicus Y chromosome     

Hayate Yamanaka  Kako Murata  Risa Tabata  Fuki Kawaguchi  Shinji Sasazaki  Yoshio Yamamoto  Meirat Bakhtin  Polat Kazymbet  Alykhan Meldevekob  Maratbek Z. Suleimenov  Masahide Nishibori  Hideyuki Mannen 《Animal Science Journal》2019,90(1):29-34

Kazakhstan is the largest landlocked country and contains two important propagation routes for livestock from the Fertile Crescent to Asia. Therefore, genetic information about Kazakhstani cattle can be important for understanding the propagation history and the genetic admixture in Central Asian cattle. In the present study, we analyzed the complete mtDNA D‐loop sequence and SRY gene polymorphism in 122 Kazakhstani native cattle. The D‐loop sequences revealed 79 mitochondrial haplotypes, with the major haplogroups T and I. The Bos taurus subhaplogroups consisted of T (3.3%), T1 (2.5%), T2 (2.5%), and T4 (0.8%) in addition to the predominant subhaplogroup T3 (86.9%), and the Bos indicus subhaplogroup of I1 (4.1%). Subsequently, we investigated the paternal lineages of Bos taurus and Bos indicus, however, all Kazakhstani cattle were shown to have Y chromosome of Bos taurus origin. While highly divergent mtDNA subhaplogroups in Kazakhstani cattle could be due to the geographical proximity of Kazakhstan with the domestication center of the Fertile Crescent, the absence of Bos indicus Y chromosomes could be explained by a decoupling of the introgression dynamics of maternal and paternal lineages. This genetic information would contribute to understanding the genetic diversity and propagation history of cattle in Central Asia.  相似文献