Antihyperglycemic,Antioxidant and Antiglycation Activities of Mulberry Leaf Extract in Streptozotocin-Induced Chronic Diabetic Rats     

Jarinyaporn Naowaboot  Patchareewan Pannangpetch  Veerapol Kukongviriyapan  Bunkerd Kongyingyoes  Upa kukongviriyapan 《Plant foods for human nutrition (Dordrecht, Netherlands)》2009,64(2):116-121

In Thailand, beverages containing mulberry leaf (Morus alba L.) are believed to promote good health, especially in people with diabetes. We examined the effects of long-term administration of an ethanolic extract of mulberry leaf (MA) on blood glucose, oxidative damage, and glycation in streptozotocin-induced diabetic rats. Daily administration of 1 g/kg MA for six weeks decreased blood glucose by 22%, which was comparable to the effect of 4 U/kg insulin. Lipid peroxidation, measured as malondialdehyde and lipid hydroperoxide concentrations (3.50 ± 0.33 and 3.76 ± 0.18 μM, respectively) decreased significantly (P < 0.05) compared to nontreated control diabetic rats (8.19 ± 0.45 and 7.50 ± 0.46 μM, respectively). Hemoglobin A_1C, a biomarker for chronic exposure to high concentration of glucose, was also significantly decreased in the MA-treated group (6.78 ± 0.30%) in comparison to untreated group (9.02 ± 0.30%). The IC₅₀ of in vitro antiglycation and free radical scavenging activities of MA were 16.4 ± 5.6 μg/ml and 61.7 ± 2.1 μg/ml, respectively. These findings support that long-term administration of MA has antihyperglycemic, antioxidant and antiglycation effects in chronic diabetic rats, which may be beneficial as food supplement for diabetics.  相似文献   

2种扦插护岸植物根系对土壤结构的改良效应     

孙一惠  马岚  张栋  夏晓平  薛孟君  苗新云 《北京林业大学学报》2017,39(7):54-61

以坡面5年生金丝柳和毛白杨为研究对象,采用土柱法测定2种扦插植物的根系分布特征,并应用Le Bissonnais法中快速湿润处理测定2种扦插植物不同土层土壤水稳性团聚体稳定性和可蚀性特征,测定指标包括:>0.25 mm土壤水稳性团聚体含量(R_0.25)、土壤团聚体平均质量直径(MWD)和土壤可蚀性因子K值。分析坡面2种扦插植物根系分布特征及其对土壤团聚体的影响,结果表明:1)扦插植物根系集中分布在树干周围0~40 cm土层内,以>5 mm的粗根为主;2)在0~100 cm土层,根系含量、土壤团聚体稳定性和抗侵蚀能力均随土层深度的增大而减小;3)金丝柳根系在提高土壤团聚体稳定性和抗侵蚀能力方面强于毛白杨;4)扦插植物R_0.25与＜1 mm根系含量均呈现显著正相关关系,说明根系改善土壤团粒结构的性能主要取决于＜1 mm根系含量。   相似文献   

Cytotoxic prenylated flavonoids from Morus alba     

Nguyen Tien Dat  Phung Thi Xuan Binh  Le Thi Phuong Quynh  Chau Van Minh  Hoang Thanh Huong  Jung Joon Lee 《Fitoterapia》2010,81(8):1224-1227

A phytochemical fractionation of the methanol extract of the Morus alba leaves led to the isolation of eleven flavonoids (1–11). The structure of the new 3′-geranyl-3-prenyl-2′,4′,5,7-tetrahydroxyflavone (1) was elucidated by means of spectroscopic methods. The cytotoxicity of the isolated compounds against human cervical carcinoma HeLa, human breast carcinoma MCF-7, and human hepatocarcinoma Hep3B cells was evaluated. Of note, morusin (9) was the most potent with an IC₅₀ value of 0.64 μM against HeLa cells.  相似文献   

Four new flavonoids from the leaves of Morus mongolica     

Xiao-Qi Zhang  Ying Jing  Guo-Cai Wang  Ying Wang  Hui-Nan Zhao  Wen-Cai Ye 《Fitoterapia》2010

Four new flavonoids (1–4) were isolated from the leaves of Morus mongolica. The structures were determined on the basis of the spectroscopic methods including UV, IR, HR-ESI-MS, 1D and 2D NMR.  相似文献   

桑树生态产业与蚕丝业的发展   总被引：17，自引：7，他引：10  

秦俭  何宁佳  黄先智  向仲怀 《蚕业科学》2010,36(6):984-989

全球普遍关注的生态环境问题与森林休戚相关,这也为桑树生态产业的发展提供了一个良好的机遇。随着桑树作为生态林树种在防沙治沙、石漠化治理、水土保持、盐碱地治理、退耕还林等方面发挥的作用,以及桑树生物资源作为家蚕饲料以外的多用途开发价值被认识和发掘,桑树产业具有良好生态效益和经济效益的特点逐渐崭露。发展桑树生态产业,开展桑树生态产业工程的建设,不仅对于我国的生态环境综合治理具有重要作用,还可以延伸和丰富蚕丝产业链,培育循环经济模式,以此带动我国脆弱生态区的生态与经济可持续发展。充分认识和发掘桑树的生态功能,正确把握桑树生态产业和传统蚕丝业的关系,建立各种类型桑树生态产业模式以及相应的蚕丝业生产与经营模式,开展适应生态产业的桑树科学研究,对推动桑树生态产业及蚕丝业的发展十分重要。  相似文献   

SSR标记与桑树发芽率、节间距性状的相关性研究     

彭波  胡兴明  邓文  叶楚华  张鸿 《蚕业科学》2010,36(2):201-208

利用微卫星(SSR)标记技术寻找与桑树发芽率和节间距性状基因紧密连锁的分子标记,可为高产桑树品种的选育提供分子遗传学方面的依据。用10对SSR引物对172份桑树品种(品系)的基因组DNA进行扩增,结果在获得的67个标记中有66个具有多态性,多态性比率为98.51%。分析供试桑品种(品系)基因组SSR标记与桑树发芽率、节间距性状的关联性发现:SSR标记mulstr4-3、mulstr6-4、mlstr6-6、ss19-1与桑树的发芽率呈显著性相关,相关系数分别为0.209、-0.215、-0.208、0.226;SSR标记mulstr3-3、mulstr4-1、ss04-1、ss04-3、ss18-1与桑树枝条的节间距呈显著性相关,相关系数分别为-0.255、0.424、-0.248、0.216、0.229,其中标记mulstr4-1可能与控制节间距性状的基因相连锁。  相似文献   

Genetics of New Crop Genus Limnanthes I. Five Morphological Marker Loci in L. alba × L. gracilis Progenies     

J. A. Dole  S. K. Jain 《Plant Breeding》1992,109(3):198-202

New crop development often depends on a few essential traits such as nonshattering of seed at maturity and pollination control. In order to domesticate Limnanthes alba (meadowfoam), as a source of industrial oil, we performed genetic analysis of crosses between L. alba and its closest relative Limnanthes gracilis var. gracilis which shows higher selfing ability and nutlet abscission. Differences in pubescence, nutlet abscission, and seedling pigmentation were each found to be governed primarily by a single locus; two interacting loci appeared to control capsule dehiscence. Segregation distortion was detected for pigmentation in F₂ and F₃ populations, and for pubescence in several F₃ families. Loci controlling pubescence, nutlet abscission, and capsule dehiscence resided in a single linkage block which assorted independently of the locus controlling pigmentation.  相似文献   

采用随机扩增多态性DNA技术（RAPD）在桑属植物系统学研究的应用初报   总被引：31，自引：5，他引：26  

向仲怀  张孝勇 《蚕业科学》1995,21(4):203-208

用ＲＡＰＤ技术研究了桑属９种材料基因组ＤＮＡ的多态性，获得了９种材料基因组ＤＮＡ的指纹图谱，并估算了遗传距离，绘出了系统树状图。探讨了桑属９个种的亲缘关系和进化分类。  相似文献   

盐胁迫下不同桑品种种子萌发特性研究   总被引：1，自引：0，他引：1  

祝娟娟  丁天龙  魏从进  边晨凯  刘雪琴  范丽  曾其伟  何宁佳  赵爱春 《蚕学通讯》2013,(1):1-6

设置7个NaCl质量浓度梯度(0,0.2%,0.4%,0.6%,0.8%,1.0%,1.2%)对粤桑69851、沙2×伦109、河南实生桑、桂优62四个桑品种种子进行NaCl胁迫处理,测定不同品种在不同处理下的发芽率、发芽势、发芽指数、盐害指数及胚根、胚芽长等指标,以研究NaCl胁迫对不同桑品种种子萌发特性的影响。结果表明,NaCl胁迫对不同桑种种子的萌发有相似的作用模式。低浓度的NaCl溶液(小于0.4%)可促进沙×伦109、河南实生桑、桂优62种子的萌发,当NaCl溶液浓度高于0.4%时则变为抑制作用。综合各项指标分析表明桂优62的耐盐性最强,其次为沙×伦109,再次为粤桑69851,河南实生桑的耐盐性最差。  相似文献   

插条长度对新疆杨扦插生根的影响   总被引：4，自引：0，他引：4  

李雪玲 《内蒙古林业科技》2013,(4):21-22

采用随机区组试验设计,研究了插条长度对新疆杨扦插成活率的影响.结果表明：无论是硬枝扦插还是嫩枝扦插,插条长度在10 ～ 15 cm之间效果最好.建议在新疆杨扦插时,采用10～15 cm的插条.  相似文献