不同浓度萘乙酸对多肉植物叶插生根发芽的影响

以景天科多肉植物胧月叶片为实验材料,对教材探究实验“探索生长素类调节剂促进插条生根的最适浓度”进行改进。采取沾蘸法,用不同浓度的萘乙酸(NAA)处理胧月的叶片。结果表明：生长素类似物NAA对叶插生根和发芽均表现出两重性,诱导多肉根原基分化的最适浓度为10^-10 mol/L;促进胧月根部伸长生长的最适浓度为10^-7 mol/L;促进芽生长的最适浓度为10^-8 mol/L;叶片对萘乙酸的敏感程度表现为根>芽。     

高校开设多肉植物通识课探究

文章阐述了高校开设多肉植物通识课的意义,初步探讨了该课程的授课内容、教学方法和考查模式等问题。本研究对高校多肉植物通识课程的教学改革具有一定的参考作用。     

呼呼熊学“带货”

最近,我们家买了18盆不同品种的多肉植物。我和妈妈把这些多肉种在了阳台上,在阳光的照耀下,一株株多肉晶莹剔透,显得格外可爱。接下来,我要为大家揭晓多肉的小秘密。你们肯定很好奇它为什么叫多肉。多肉植物也叫多水植物、肉质植物,它的茎、叶、根具有发达的薄壁组织,能贮藏水分,在外形上看是肥厚多汁的一类植物,“多肉”二字就是根据其特性来的。     

不怕渴不怕晒的“萌肉”

嗨！大家好,先来看看我像什么？对啦,我的叶子就像一只只小熊掌,中文名叫“熊童子”。我可是多肉植物大家庭里的明星哦。我的老家在非洲的纳米比亚,按照家谱记载,我是景天科银波锦属这一支的。因为受到大家的喜爱,我就漂洋过海来到了中国跟大家做伴喽。     

昆明市常见秋色叶植物在校园、居住小区之园林景观设计中应用研究

在调查昆明地区秋色叶植物组成的36个科61个属的103个种的基础上,重点选择最常见的45种秋色叶植物,主要是从观赏特性入手,分析了其在校园、居住小区之园林景观设计中的具体应用问题。针对其特点和问题,提出了提高这些树种最佳应用场所的4条建议。     

“华韵之美植入万家”——多肉植物花器产品设计初探

多肉植物园艺养殖在欧美国家兴起,并有上百年的园艺培养历史,近年来这一生活爱好从韩国日本传入我国,并迅速蹿红,产业覆盖面大,发展速度迅猛。多肉植物的品种数以万计,与之相匹配的花盆器皿也是五花八门层出不穷。经过市场深度考察之后,笔者发现这一市场存在大量的仿制品和舶来品。我国产品在创意上缺少中国元素的注入,更缺少中国元素的现代转化。民族的产品设计振兴,不能只是结合中国传统文化做出陶艺花器,更应该是对中国传统文化和元素进行提取,做出符合现代中青年审美的花器产品。     

小小蛋壳用处大

一、整体观察识大意王老师:今天,我给大家带来了一个宝贝。瞧,是半个蛋壳!如果把它送给你,你会把蛋壳做成什么呢?皓皓:我想在蛋壳上画上眼睛和嘴巴,把蛋壳变成一个娃娃。文文:我喜欢多肉植物,我可以拿蛋壳当小花盆。王老师:阳光暖暖的,草儿青青的,小虫子、蝴蝶和蚂蚁出来玩啦!它们也发现了这半个蛋壳。看看这四幅图,说一说它们用这半个蛋壳做了什么吧!可以说说每幅图的图意,也可以将四幅图连起来说一说。     

多肉植物是一群好性格的家伙

<正>多肉植物是一群好玩的家伙,样子可爱,性格强健,随遇而安。它们还有其他名字:多浆植物、肉质植物。它们属于仙人掌科,但没刺。名字来源是因为它们的茎、叶、根肥厚多汁,看上去胖乎乎、圆滚滚的,十分可爱。装修布置得再好的空间,时间久了,也会变得枯燥和乏味。多肉植物,是抗击疲劳的利器。它小小的一点,形态各异,生机勃勃。月兔耳、三角琉璃莲、千代田之松、静夜、芙蓉雪莲……光名字就已经足够美。多肉、厚实     

若干多肉植物提取液的紫外吸收光谱测定

应用超声萃取法提取十余种多肉植物中的有效防晒成分,利用紫外分光光度计分别测定各种提取液的紫外吸收光谱,将各种提取液的最大吸收峰及吸光度从三种(UVA、UVB、UVC)紫外线波长范围进行分析.结果发现,不同种多肉植物对紫外光均具有一定程度的吸收,不过吸收的紫外光情况存在很大差异.芦荟等植物主要吸收的是UVB波段的紫外线,天使之泪等多肉植物主要吸收U VA波段的紫外线,红日等多肉植物主要吸收U VC波段的紫外线.这些数据可为研制天然防晒剂提供有益的参考.     

景天三七与轮叶景天同工酶的研究

采用薄层聚丙烯酰胺等电聚焦电泳方法 ,分别测定了景天三七和轮叶景天不同营养器官的同工酶谱 ,并根据电泳后所显示的酶带数计算出品种间的相似性系数 ,分析同为景天科的两种植物存在的差异及原因。结果表明 :造成这种差异的根本原因在于两种植物基因间的差异     

景天三七的组织培养——愈伤组织诱导

以景天三七的茎段和叶片作为外植体,采用MS培养基为基本培养基,附加不同的植物激素组合进行实验,诱导其产生愈伤组织.结果表明:适合于离体茎段和叶片愈伤组织诱导的培养基是MS+6-BA1.0mg/L+2,4-D1.0 mg/L,诱导率分别为66.67%和76.19%.     

养心草中齐墩果酸的含量测定

采用高效液相色谱仪,Hypersil ODS(5μm,250mm×4.0mm)色谱柱,流动相为甲醇:0.1%磷酸溶液(80:20),检测波长为215nm,测定养心草中齐墩果酸的含量。结果表明齐墩果酸在10.0—100.0μg·mL-1范围内呈现良好线性关系,平均回收率为100.4%。该法简便、快速、灵敏、准确、重现性好,可作为测定养心草中齐墩果酸的方法。     

紫景天化学成分的LC/MS分析

目的:用液质联用技术,分析紫景天的化学成分.方法:采用醇提法提取紫景天中的化学成分,运用液相色谱-质谱联用法进行检测.结果:通过对254nm波长下的液质图谱的解析,分析出紫景天中舍有β-谷甾醇、草质素-8-甲醚和草质素-7-0-α-L-吡喃鼠李糖苷.结论:液质联用技术能够快速准确的分析出紫景天中的化学成分,为多组分样品的分析提供了快速便捷的方法.     

岩景天对家兔实验性高脂血症及动脉粥样硬化的影响

探讨岩景天水煎液灌胃10周对饲高脂饲料家兔高脂血症的影响及防治动脉粥样硬化的作用．岩景天治疗5周可显降低血脂，治疗10周减轻动脉粥样硬化病变程度．     

景天三七中总黄酮提取条件和含量分析

目的：研究不同提取溶剂对景天三七中总黄酮的含量影响及最佳提取条件下总黄酮的含量。方法：采用盐酸一镁粉法和醋酸铅法对景天三七中总黄酮进行检识,并用不同溶剂对景天三七中总黄酮进行了提取,以分光光度法测定总黄酮含量,以芦丁为标准品,以10％AI（NO2）3-5％NaNO2为显色剂,在508nm波长处进行测定。结果：检识试验证明景天三七中含有黄酮类物质,且最佳提取溶剂为80％乙醇（P〈0．05）。在此提取条件下,测得景天三七中总黄酮的含量为18．39mg&#183;g～,RSD为2．2％（n=5）。总黄酮测定线性范围为15．20-45．60beg&#183;mL^-1。（r=0．9997）,平均回收率为95．74％,RSD为0．98％（n=6）。结论：景天三七中黄酮类物质的最佳提取溶剂为80％乙醇。本法准确可靠,重现性好,结果稳定,适合于景天三七中总黄酮含量分析。     

多功能蔬菜“养心菜”的引进与开发

养心菜集观赏、药用、食用等多种功能于一身,本文对其特征特性、栽培技术及开发前景进行阐述,为加快养心菜的开发提供帮助。     

Response of ATP sulfurylase and serine acetyltransferase towards cadmium in hyperaccumulator Sedum alfredii Hance

We studied the responses of the activities of adenosine-triphosphate (ATP) sulfurylase (ATPS) and serine acetyltransferase (SAT) to cadmium (Cd) levels and treatment time in hyperaccumulating ecotype (HE) Sedum alfredii Hance, as compared with its non-hyperaccumulating ecotype (NHE). The results show that plant growth was inhibited in NHE but promoted in HE when exposed to high Cd level. Cd concentrations in leaves and shoots rapidly increased in HE rather than in NHE, and they became much higher in HE than in NHE along with increasing treatment time and Cd supply levels. ATPS activity was higher in HE than in NHE in all Cd treatments, and increased with increasing Cd supply levels in both HE and NHE when exposed to Cd treatment within 8 h. However, a marked difference of ATPS activity between HE and NHE was found with Cd treatment for 168 h, where ATPS activity increased in HE but decreased in NHE. Similarly, SAT activity was higher in HE than in NHE at all Cd treatments, but was more sensitive in NHE than in HE. Both ATPS and SAT activities in NHE leaves tended to decrease with increasing treatment time after 8 h at all Cd levels. The results reveal the different responses in sulfur assimilation enzymes and Cd accumulation between HE and NHE. With increasing Cd stress, the activities of sulfur assimilation enzymes (ATPS and SAT) were induced in HE, which may contribute to Cd accumulation in the hyperaccumulator Sedum alfredii Hance. Project supported by the National Natural Science Foundation of China (No. 30630046) and the Hi-Tech Research and Development Program (863) of China (No. 2006AA06Z386), and the Program for Changjiang Scholars and Innovative Research Team in University, China (No. IRT0536)     

Response of ATP sulfurylase and serine acetyltransferase towards cadmium in hyperaccumulator Sedum alfredii Hance

We studied the responses of the activities of adenosine-triphosphate (ATP) sulfurylase (ATPS) and serine acetyl-transferase (SAT) to cadmium (Cd) levels and treatment time in hyperaccumulating ecotype (HE) Sedum alfredii Hance, as compared with its non-hyperaccumulating ecotype (NHE). The results show that plant growth was inhibited in NHE but promoted in HE when exposed to high Cd level. Cd concentrations in leaves and shoots rapidly increased in HE rather than in NHE, and they became much higher in HE than in NHE along with increasing treatment time and Cd supply levels. ATPS activity was higher in HE than in NHE in all Cd treatments, and increased with increasing Cd supply levels in both HE and NHE when exposed to Cd treatment within 8 h. However, a marked difference of ATPS activity between HE and NHE was found with Cd treatment for 168 h, where ATPS activity increased in HE but decreased in NHE. Similarly, SAT activity was higher in HE than in NHE at all Cd treatments, but was more sensitive in NHE than in HE. Both ATPS and SAT activities in NHE leaves tended to decrease with increasing treatment time after 8 h at all Cd levels. The results reveal the different responses in sulfur assimilation enzymes and Cd accumulation between HE and NHE. With increasing Cd stress, the activities of sulfur assimilation enzymes (ATPS and SAT) were induced in HE, which may contribute to Cd accumulation in the hyperaccumulator Sedum alfredii Hance.     

Pb uptake, accumulation, subcellular distribution in a Pb-accumulating ecotype of Sedum alfredii (Hance)

Lead concentrations in roots, stems and leaves of accumulating and non-accumulating ecotypes of Sedum alfredii (Hance) were studied through a hydroponic experiment with different Pb concentrations supplied as Pb(NO3)2. Lead concentrations in leaves and stems of the accumulating ecotype were 4-9 times and 3-5 times those of the non-accumulating ecotype, and Pb-accumulated amounts in stems and leaves of the accumulating ecotype were 4-9 times and 8-11 times higher than those of the non-accumulating ecotype, respectively. The results indicated that the accumulating ecotype had better ability to transport Pb from roots to shoots. The subcellular distributions of Pb in the root, stem and leaf tissues were studied using sucrose differential centrifugation. Approximately 50% of Pb contents was found to be associated with the cell wall fraction in stems of the accumulating ecotype and the percentage increased to 80% both in roots and leaves, no matter when plants were grown with different levels of Pb. The results indicated that the distribution of Pb on cell walls of the accumulating ecotype could mainly account for the high tolerance to Pb.