共查询到19条相似文献,搜索用时 171 毫秒
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以草麻黄为材料,研究了不同剂量的N^+注入对成熟胚诱导愈伤的影响,并对激素配比进行了优化实验。结果显示:对于草麻黄成熟胚愈伤诱导及继代培养,最佳激素配比为2mg/L2,4-D+2mg/L 6-BA。剂量为3.0~5.0×10^16 ions/cm^2的氮离子注入成熟胚后,其存活率与对照相比显著下降;2.0×10^16ions/cm^2的氮离子注入处理能显著提高愈伤组织的诱导率;此外,各继代时段,1.0~4.0×10^16ions/cm^2的4个氮离子注入处理其愈伤组织增长速度均高于对照,且随着注入剂量的增加而加快。 相似文献
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研究碳源、生长调节物质、氮源、磷酸盐以及有机添加物对黄芩愈伤组织中黄芩苷含量和产量影响的结果表明,在(25±1)℃暗培养条件下,黄芩苷积累的最佳培养基为MS基本培养基,其中氮源浓度为60mmol·L-1(NH4+:NO3-为1:1),KH2PO4浓度为1.5mmol·L-1,附加80g·L-1蔗糖、0.3mg·L-1IAA、2mg·L-16-BA和200mg·L-1蛋白胨。在上述培养基中,黄芩愈伤组织培养40d后的黄芩苷含量达到167.4mg·g-1,产量达到4.8g·L-1,分别是对照的5.54倍和18.2倍。 相似文献
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机械振荡对猕猴桃愈伤组织ATP含量的影响 总被引:4,自引:0,他引:4
采用不同频率的往复机械振荡,以木质藤本植物中华猕猴桃(Actinidia chinensis)茎段的愈伤组织为实验材料,测定.ATP含量的变化,并通过与对照组(CK)相应值的比较,研究振荡刺激对植物能量代谢的影响。结果表明,机械振荡对猕猴桃愈伤组织ATP的含量有着比较明显的增强或抑制的双重效应,适度的振荡刺激将有利于提高植物的能量代谢水平,促进植物的生长发育,其中最适的振荡频率为3Hz左右。还从细胞和分子生物学的角度对环境应力影响植物能量代谢的可能机理进行了探讨。 相似文献
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郭文慧;王越;吴琳;杨剑飞;杨玲;张鹏;吴海波;沈海龙 《植物研究》2025,(1):130-138
黄酮在植物体胚发生过程中扮演重要角色。为了探究黄酮对红松(Pinus koraiensis)体胚发生的作用效果,该研究以红松胚性愈伤组织为试材,通过添加不同浓度、不同种类黄酮(槲皮素、柚皮素、儿茶素)及苯丙氨酸解氨酶(PAL)抑制剂2-氨基茚满-2-膦酸盐酸盐,测定处理后胚性愈伤组织增殖率、体胚数量及氧化胁迫相关指标变化。结果表明:胚性愈伤组织的增殖率随着外源黄酮浓度的升高逐渐降低,而体胚诱导数量先升高后降低,体胚产生数量在20μmol?L-1的外源黄酮处理下达到最高。黄酮能够降低胚性愈伤组织中总活性氧水平(ROS)、过氧化氢(H2O2)和丙二醛(MDA)含量,升高超氧化物歧化酶(SOD)活性,降低过氧化氢酶(CAT)、过氧化物酶(POD)、抗坏血酸过氧化物酶(APX)和谷胱甘肽过氧化物酶活性(GPX)。综上所述,外源黄酮主要通过影响胚性愈伤组织氧化胁迫水平,调控细胞增殖及胚性愈伤组织分化进程,促进红松体胚形成。 相似文献
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用氦氖激光处理香石竹愈伤组织,可使材料中的34kD和28kD蛋白含量高于对照,并产生分子量约为22kD的新的蛋白带。而用氩离子激光处理后,则出现一条分子量约为45kD的新的蛋白带。此外,激光处理亦明显影响愈伤组织的过氧化物酶同工酶谱及其活性,其中氦氖激光处理后产生了Rf为0.17和0.26的新酶带,而用氩离子激光处理则只产生Rf为0.17的新酶带。激光对香石竹愈伤组织的酯酶同工酶无影响。 相似文献
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何首乌愈伤组织的诱导 总被引:4,自引:2,他引:4
研究了外植体、光暗条件、植物激素等因子对何首乌愈伤组织诱导的影响 ,以及 6 -BA和何首乌组织提取液对愈伤组织增殖的影响。结果表明 :茎段的愈伤组织诱导优于带侧芽茎段和叶片 ;光照有利于愈伤组织的诱导 ;4因子 4水平的正交实验表明 ,对何首乌茎段愈伤组织诱导的影响 2 ,4 -D >6 -BA >IBA >IAA ,最佳激素搭配是 :MS +2 ,4 -D 2mg L +6 -BA 1mg L +IBA1mg L或MS +2 ,4 -D 2mg L +6 -BA 2mg L +IAA 1mg L ;MS培养基中附加 6 -BA或组织提取液均促进愈伤组织的增殖。 相似文献
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以药用寄生植物锁阳的不同部位肉质茎为外植体,研究外植体形态及植物生长调节剂配比对愈伤组织形成、增殖及不定根分化的影响,建立了高效的锁阳肉质茎愈伤组织诱导、增殖和不定根分化体系。结果表明,锁阳茎下部大小为1.5cmx1.5cmxl.5cm的外植体,维管束平行于培养基放置,有利于愈伤组织形成;外植体培养50d,愈伤组织形成。高效的愈伤组织诱导培养基为Ms+6-BA1.0mg.L-1+2,4-D3.0mg·L-1,愈伤组织诱导率可达67%;增殖培养基为Ms+6.BA0.5mg·L-1。+2,4-D1.5mg·L-1,NxsN74%;在Ms+6.BA1.0mg·L-1+NAA2.0mg·L-1。分化培养基中,不定根诱导率达56%。 相似文献
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Raz Krizevski Einat Bar Or Shalit Yaron Sitrit Shimon Ben-Shabat Efraim Lewinsohn 《Phytochemistry》2010,71(8-9):895-903
Ephedra sinica Stapf (Ephedraceae) is a widely used Chinese medicinal plant (Chinese name: Ma Huang). The main active constituents of E. sinica are the unique and taxonomically restricted adrenergic agonists phenylpropylamino alkaloids, also known as ephedrine alkaloids: (1R,2S)-norephedrine (1S,2S)-norpseudoephedrine, (1R,2S)-ephedrine, (1S,2S)-pseudoephedrine, (1R,2S)-N-methylephedrine and (1S,2S)-N-methylpseudoephedrine. GC–MS analysis of freshly picked young E. sinica stems enabled the detection of 1-phenylpropane-1,2-dione and (S)-cathinone, the first two putative committed biosynthetic precursors to the ephedrine alkaloids. These metabolites are only present in young E. sinica stems and not in mature stems or roots. The related Ephedra foemina and Ephedra foliata also lack ephedrine alkaloids and their metabolic precursors in their aerial parts. A marked diversity in the ephedrine alkaloids content and stereochemical composition in 16 different E. sinica accessions growing under the same environmental conditions was revealed, indicating genetic control of these traits. The accessions can be classified into two groups according to the stereochemistry of the products accumulated: a group that displayed only 1R stereoisomers, and a group that displayed both 1S and 1R stereoisomers. (S)-cathinone reductase activities were detected in E. sinica stems capable of reducing (S)-cathinone to (1R,2S)-norephedrine and (1S,2S)-norpseudoephedrine in the presence of NADH. The proportion of the diastereoisomers formed varied according to the accession tested. A (1R,2S)-norephedrine N-methyltransferase capable of converting (1R,2S)-norephedrine to (1R,2S)-ephedrine in the presence of S-adenosylmethionine (SAM) was also detected in E. sinica stems. Our studies further support the notion that 1-phenylpropane-1,2-dione and (S)-cathinone are biosynthetic precursors of the ephedrine alkaloids in E. sinica stems and that the activity of (S)-cathinone reductases directs and determines the stereochemical branching of the pathway. Further methylations are likely due to N-methyltransferase activities. 相似文献
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草麻黄雌性生殖器官的个体发生和畸形式样研究 总被引:2,自引:1,他引:2
杨永 《Acta Botanica Sinica》2001,43(10):1011-1017
用扫描电镜观察并分析了草麻黄(Ephedra sinica Stapf)雌性生殖器官的个体发生及畸形式样。该种雌球花个体发生式样与麻黄属其他具双胚朱球果的类群基本一致。外珠被以一对近轴侧突起物出现以及该突起物与苞片成交互排列的发育式样支持前人关于该构造叶性本质的论述,而内珠被与珠心的发育相关,因此可能是真正的珠被,基于返祖性畸形三胚珠球花的出现及其他形态特征,认为麻黄属胚珠数目减少是该属内物种特化的一个趋势;利用雌球花发育的畸形现象及外珠被的形态学本质提出麻黄属的雌球果为复轴性构造,雌性生殖单位是由类似于科达类的次级生殖枝构造经系统发育变态,融合,简化成现存的生胚珠构造式样,每一可育苞片及其腋内雌性生殖单位共同组成了麻黄属的苞鳞-种鳞复合体。 相似文献
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以银斑百里香种子为试材,比较了不同浓度的NAA和2,4-D与6-BA对百里香愈伤组织诱导效果的影响。结果表明:NAA在0.15(mg/L)和2,4-D在0.9(mg/L)是诱导银斑百里香种子产生愈伤组织的最佳浓度;MS+NAA(0.15mg/L)+6-BA(0.6mg/L)和MS+2,4-D(0.9mg/L)+6-BA(0.6mg/L)诱导的效果最佳,建立了百里香愈伤组织培养的实验体系。 相似文献
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Ephedra sinica Stapf (commonly, Chinese ephedra) grows mainly in Mongolia, Inner Mongolia, and other regions of northern China. The stems
of Chinese ephedra have been called the world’s oldest medicine; other uses remain to be reported. Among the Mongolian people,
in addition to medical applications, the fleshy bracts of the seed cones (or “fruit”) are traditionally used as food, fresh
or dried, in several ways; for example, the fruit is used as a refined sugar, a cheese condiment, and a tea substitute. In
this paper, we analyze the fruit’s nutritional components: moisture, crude protein, crude fat, crude fiber, carbohydrate,
ash, pectin, vitamins, fatty acids, mineral elements, and amino acids. Ethnobotanical and nutritional component information
may indicate that the plant has potential for development as a special food plant 相似文献
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光质、光强和光期对水母雪莲愈伤组织生长和黄酮生物合成的影响 总被引:1,自引:0,他引:1
白光、蓝光、红光和远红光等不同光质照射及不同的白光强度对水母雪莲愈伤组织生长、苯丙氨酸氨基裂解酶(PAL) 活性及黄酮合成有不同的影响。红光明显促进愈伤组织的生长,但强烈抑制PAL活性和黄酮的合成。蓝光对愈伤组织生长无明显影响,但显著提高PAL 活性和黄酮的合成。白光的作用介于红光和蓝光之间。远红光的作用与蓝光相似,但作用比较弱。每天16 h 蓝光加8 h 白光和8 h 蓝光加16 h 白光的组合产生最高的黄酮含量和黄酮生产率。 相似文献
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Chromosomal Instability in Callus Culture of Pisum sativum 总被引:2,自引:0,他引:2
A study on the variation in chromosome number and structure of the cells from 45-days-old embryonal axis explant callus tissue
of Pisum sativum L. of four genotypes was undertaken. The chromosome number showed a wide range of variation, however, the majority of cells
studied were observed to be diploid (2n= 2x= 14) in nature. Among the numerical aberrations induced, tetraploid cells were the most frequent as compared to aneuploid
cells of cells with a higher ploidy level. The frequency of fragments and bridges were highest among other structural changes.
The composition and concentration of growth regulators was found to effect chromosomal instability whereas there was no effect
of genotype. 相似文献