晋冀豫鲁罗布麻资源及栽培技术

对晋冀豫鲁罗布麻(Apocynum venetum Linn.)资源进行了调查.结果表明,罗布麻在山东省分布较多,其次为山西省.整体上说,资源量正日渐减少.介绍了罗布麻的人工栽培技术.     

戈宝红麻茶品质初探

戈宝红麻生长在我国罗布红麻分布纬度最高的地区,是罗布红麻中的一个特殊生态类型,经初步分析发现,戈宝红麻叶制成的绿茶,其总黄酮含量在4.07%~4.86%之间,总氨基酸含量在13.51%~15.52%之间。因此,戈宝红麻茶是罗布红麻茶中最优秀的,在汤色和口感方面都是上乘的,长期饮用,可以得到营养和辅助疗效的双重效果。     

不同遮荫条件下罗布麻光合特性的初步研究

用便携式光合测定仪和叶绿素荧光仪测定了不同遮荫条件下罗布麻叶片的光合参数和叶绿素荧光参数.结果显示:遮荫50%和70%处理较全光照的罗布麻叶片净光合速率(Pn)、蒸腾速率(Tr)和光饱和点(LSP)分别降低47%和65%、45%和68%、20.41%和37.45%,而表观量子效率(AQY)分别提高33%和36%;不同遮荫下罗布麻的叶绿素荧光参数PSⅡ原初光能转化效率(Fv/Fm)和PSⅡ潜在活性(Fv/Fo)均比全光照降低.研究表明,罗布麻虽对弱光有一定适应能力,但遮荫仍产生明显的弱光抑制而显著降低其光合效率,影响其正常生长.     

超声波强化提取罗布麻中总黄酮

本研究采用超声波强化提取罗布麻中总黄酮,选择乙醇浓度、超声功率、超声时间、料液比为因素进行正交实验优选出超声提取的最佳工艺条件：即60％浓度乙醇,料液比为1：15,在300W的超声波下超声提取10min,提取率达90％以上。采用超声波提取技术,具有提取效率高、提取时间短、提取温度低的优点。     

Ecophysiological Responses to Neighbor Removal in an Old-Field and a Prairie in Northeastern Kansas,USA

An ecophysiological approach was used to determine if competition can be detected among plants in a recently abandoned old-field and in a native tallgrass prairie in northeastern Kansas. In situ photosynthetic parameters and water potentials (Ψ) of target plants were measured 1-2 d after neighbor (intra- and interspecific) removal as well as 1-4 weeks later, and compared with values for plants with neighbors. Only two of the six study species (four old-field and two prairie species) responded to removal of neighboring plants, and only after several weeks had elapsed. Net photosynthetic rates (P_N) and stomatal conductances (g_s) of Ambrosia trifida in an old-field increased after removal of both intra- and interspecific neighbors. For Apocynum cannabinum, another old-field species, P_N of target plants without neighbors was significantly higher than that of target plants with neighbors. For both these species, values of Ψ were not different between target plants with and without neighbors, suggesting that increased availability of nutrients may have been responsible for the observed ecophysiological responses. Though numerous past studies indicate that competition is a major factor influencing plants in old-field and in prairie communities, the experimental approach used in this study revealed that neighbor removal had only limited effects on ecophysiology of the target plants in either community. This revised version was published online in June 2006 with corrections to the Cover Date.     

氯化钠胁迫对罗布麻种子萌发及幼苗生长的影响

用不同浓度的氯化钠溶液处理罗布麻种子,试验结果表明,氯化钠浓度低于0.8%时,可促进罗布麻种子萌芽,高于0.8%小于2.0%时抑制萌芽,超过2.0%时极显著抑制种子萌芽。氯化钠浓度高低均对罗布麻幼苗生长有抑制作用,当浓度大于0.4%时,出叶速度减慢,植株矮化、相对抑制率超过60%,鲜重与对照相比降低了50%以上。     

戈宝红麻野生株丛物候学观察

戈宝红麻生态条件比较特殊,是罗布红麻的一个特殊生态类型。2006～2009年我们对其野生麻田进行了物候学观察。并将其物候学观察结果与山东、南疆的罗布红麻进行比较,发现戈宝红麻每年虽然生育期较短,但能充分完成其生长发育过程,在罗布红麻中形成独特的物候学规律。同时,也分析了戈宝红麻能够完成其生长发育的有利条件和独特性质。     

我国中东部地区罗布红麻资源濒危状况探讨

罗布红麻在我国中、东部地区历来生长很多,到20世纪50—60年代仍广泛分布着。然而作者在2005—2008年问的调查,发现许多以前生长罗布红麻的地方,现在已不复存在了。目前,罗布红麻几乎有完全灭绝的可能,将几年来的调查结果报告如下,以引起有关方面对罗布红麻濒危状况和保护生物多样性的注意,对罗布红麻的保护和利用也提出了一些切实可行的建议。     

罗布麻愈伤组织诱导及植株再生

以罗布麻(Apocynum venetum L.)当年的成熟种子和5周龄的幼苗叶片为外植体,研究了不同激素组合、暗培养对愈伤组织及植株再生的影响.结果表明,幼苗作外植体诱导愈伤的最佳培养基为添加1.0 mg/L 6-BA 0.2 mg/L IBA的MS培养基;继代培养中1.0 mg/L 6-BA与0.2 mg/L IBA组合愈伤致密而生长迅速,长时间培养硬化的愈伤组织可用添加0.5 mg/L 6-BA和0.1 mg/L IBA培养基和初期暗培养获得大量质地疏松、增殖迅速的愈伤组织;再生苗诱导以0.5 mg/L 6-BA 0.2 mg/L IBA组合为佳;1/2MS附加NAA 0.6 mg/L为适宜的生根培养基,初步建立了罗布麻离体再生体系.