香荚兰产业化无土栽培技术研究

通过4个营养液配方、2种攀缘物及高度、2种无土基质配方和2种无土基质与土壤隔离物试验,初步筛选出适宜于香荚兰无土栽培的营养液配方2个,进一步验证了有机基质有利于香荚兰生长发育,并提出"人工荫棚下香荚兰全新的仿生攀缘栽培技术"理念及初步的研究方案。     

草本植物调理剂对肥育猪肉质特性的影响

选用50kg左右的"长×双×沙"三元杂交肥育猪48头,随机分成3组,设1个对照组和2个试验组,每组4个重复。试验组分别在基础日粮中添加0.5%的蒙生草本植物调理剂和0.5%的香草添加剂,探讨蒙生草本植物调理剂对育肥猪肉品质的影响。结果表明:日粮添加0.5%的蒙生草本植物调理剂或香草添加剂,与对照组相比,失水率分别降低4.17%、4.22%;贮存损失分别降低11.99%、7.12%;熟肉率分别提高2.99%、3.39%;肌肉中粗脂肪含量分别提高了40.03%(P<0.05)、43.01%(P<0.05);总氨基酸含量分别提高8.21%、5.63%;品味综合评分分别为8.93分、8.97分,高于对照组;铅残留分别降低26.09%(P<0.05)、43.48%(P<0.01),未检出砷、汞、磺胺类、瘦肉精。猪肉安全、营养、风味好。     

香草兰VpLFY基因的克隆与表达分析

花分生组织特征基因LEAFY在植物花芽分化与成花诱导途径中起着重要的调控作用。通过RACE方法从香草兰中克隆Vp LFY基因的全长c DNA序列。结果显示,该基因包含一个1 493 bp的开放阅读框,编码491个氨基酸残基。经蛋白质序列同源比对分析结果发现,Vp LFY属于FLO-LFY家族。组织特异性研究结果表明,Vp LFY基因在香草兰组织中属于组成型表达。荧光定量分析结果表明,Vp LFY基因分别在香草兰纯花芽和混合花芽的不同发育阶段中有着较强的表达。     

Biodiversity and preservation of vanilla: present state of knowledge

The genus Vanilla belongs to the Orchidaceae family and Vanilla planifolia, probably endemic from tropical forests in Eastern Mexico, is the main source for commercial vanilla. There has recently been an important number of publications covering Vanilla taxonomy, particularly using molecular genetics, but the taxonomy of the genus is still unclear and numerous synonyms remain. Recent studies showed that inter-specific hybridization and perhaps even polyploidization played an important role in the evolution of the genus. There has also been an important increase in the knowledge of the genetic diversity and reproductive biology of V. planifolia in natural conditions, showing that mating system diversity exists in Vanilla and that this genus could be a good model to study the role of fragrance in orchid evolution. Recent studies on the genetic consequences of V. planifolia domestication are also presented and raise major scientific questions regarding the origin of phenotypic diversity in a vegetatively propagated crop. Finally, all these studies have demonstrated the urgent need for preservation of the genetic resources of V. planifolia (primary and secondary gene pools, and cultivated resources) and current conservation efforts are presented.     

不同基质栽培非洲菊的切花产量和品质

试验对栽培于温室中珍珠岩、沸石、砂质和岩棉基质上非洲菊Ｆａｍｅ、Ｐａｒｔｙ、Ｒｅｇｉｎａ、Ｘｉｍｅｎａ进行评价,17个月的时间里测定其切花产量和品质(花柄长度和宽度)。结果表明,珍珠岩基质栽培的非洲洲菊产量最高,达75～80枝,沸石基质的产量最低,砂质与岩棉基质产量中等。相比其它品种,Ｐａｒｔｙ品种略显高产。切花品质受基质、品种和种植时间影响,第一阶段(7～8月)珍珠岩基质栽培的切花品质更好,但第二阶段各基质无差异不同基质栽培非洲菊的切花产量和品质