Auxins increase the occurrence of leaf-colour variants in Caladium regenerated from leaf explants     

E. U. Ahmed  T. Hayashi  S. Yazawa 《Scientia Horticulturae》2004,100(1-4):153-159

Leaf explants of Caladium ‘Pink Cloud’ were cultured in vitro on MS medium containing various auxins (NAA, IBA, IAA, 2,4,5-T and 2,4-D) in combination with cytokinin (BA). NAA gave the most vigorous in vitro propagation of this plant, and only 15% of the plants were leaf-colour variants on the medium containing 0.5 μmol NAA. Leaf colour variation was observed in all plants regenerated on the medium containing 2,4-D at 0.5–4.5 μmol. In hormone-free medium, only a few leaf-colour variants (6%) occurred, but the rate of plant regeneration was very low. Application of 0.5 μmol NAA together with 4.5 μmol BA seemed to be the most appropriate for in vitro propagation of Caladium ‘Pink Cloud’ with only a few leaf-colour variants.  相似文献   

不同处理对四季秋海棠扦插生根的影响研究   总被引：10，自引：1，他引：10  

柯存祥 《中国农学通报》2006,22(4):331-331

以四季秋海棠为材料，进行扦插生根研究。试验结果表明：不同季节、不同基质、不同植物生长调节剂对四季秋海棠扦插生根有很大的影响，其中秋季扦插，以河沙做基质，以30mg/LNAA、30mg/LIAA或50mg/LIBA处理的插条生根效果较好。  相似文献   

生长素对植物维管分化的信号诱导作用   总被引：1，自引：0，他引：1  

王丰  程方民 《江苏林业科技》2004,31(1):40-44

植物维管系统与植物生长发育关系密切，维管组织的分化机制也因此倍受关注。生长素可诱导植物维管组织分化，它根据自身浓度的高低产生系列信号，从而通过这些信号来控制其所在部位及其周围区域维管组织的分化状况。该文重点论述了生长素在细胞间的极性运输方式及其信号转导途径、生长素对维管组织分化的信号诱导作用及其表现特征，以及生长素诱导植物维管组织分化的分子机理。  相似文献   

FAST BREEDING OF GROUND-COVER CHRYSANTHEMUM     

刘宏伟 《林业研究》1994,5(4):33-36

Ground-coverchrysanthemum(Dendranthemaxgrandof0raTzvel)isanexcellentpersistingrootflowerwithshortplant,highregressiveresistance,densebloomandcarelessmanagement.Itisre-gardedasagoodbreedforgardenaffores-tationandcomesintobloomaroundtheNationalDay.Cuttageandplantdivisionmethodsarethemostinuseforbreedingofthisspecies-Thetest-tubebreedingmeth-odwasad0ptedinthisexperimentinordertoincreasethebreedingc0efficientoftheimprovedbreed.MATERIALSANDMETHODSTheshort-yellowspeciesofground-coverchrysa…  相似文献   

GR24和IAA及互作对甜瓜胚根和不定根生长的影响     

李敬蕊  王育博  张颖  吴晓蕾  宫彬彬  吕桂云  高洪波 《西北农业学报》2021,(10):1484-1494

为探求促进甜瓜根系生长的有效方法,以种子和幼苗为试材,研究独脚金内酯人工合成类似物（GR24）和吲哚乙酸（IAA）及互作对胚根和不定根生长的影响。结果表明,在0.1~5  mg·L^-1 GR24和  0.01~10 mg·L^-1IAA单一或互作处理下,胚根生长呈先升高后降低趋势,以1  mg·L^-1 GR24+0.1  mg·L^-1 IAA处理效果显著,根长、根数和体积分别为对照的4.32、4.47和4.44倍;胚轴不定根生长在  0.01~1 mg·L^-1GR24和75~500  mg·L^-1 IAA单一或互作处理下也呈先升高后降低趋势,以0.1  mg·L^-1 GR24+250  mg·L^-1 IAA处理的根数、表面积和体积提高幅度最大,分别为对照的2.34、3.97和10.27倍。方差分析表明,GR24和IAA对根系生长均有显著促进作用,且互作效应明显。证明GR24和IAA影响胚根和不定根生长,且存在明显互作和累积效应,但胚根和不定根适宜质量浓度存在差异,结果为瓜类蔬菜根系生长调控提供理论依据和技术支撑。  相似文献   

TISSUE CULTURE OF ROSA CHINENSIS VAR.FLORIBUNDA     

朱虹 《林业研究》1996,(2)

INTRODUCTI0NScIllossManl1hcin1-t"hicl1isbclongtoRosaccacan`lRo.vol.'I1asbeautifulcolorandgoodt1oxtcrshapcltsflottcrlngpcrlod1sverylong(2~3mol1tl1s)SchlossMannhclmcanli"cundcrdiffcrcntcli1natcc0nditionsandcanbccultlX'atcdinpotandpla11tcdal0ngstrccts.Thctissueculturcn1ethod\"astlscdinthISstudy'f0rincrcasingpropagationratcofSclllossMannhcin1.MATERIALSANDMETHO0SExPcrimcntaIMatcriaIsScl1IossMa11nI1cll111\asscIcctcdIYon1grccnhousclnAugustof1`j()4Fulla11dunsproutll1gbudsxtcrctakc…  相似文献   

麻疯树PIN基因家族的鉴定与生物信息学分析   总被引：1，自引：0，他引：1  

王占军  杨立伟  徐忠东  欧祖兰  袁华玲  任意飞  齐璐璐  何子昂  陈延松 《分子植物育种》2015,(5)

PIN基因家族是一类调控植物生长素极性运输的重要载体元件。本研究利用功能已知的拟南芥PIN蛋白家族为参考序列,在麻疯树全基因组数据中共鉴定出9条PIN基因,并针对9条JcPIN基因开展系统的生物信息学研究,开展进化树构建和基序分析以及基因表达研究和密码子偏好性解析。结果发现:9条麻疯树PIN蛋白多属于由碱性氨基酸组成的稳定蛋白,均为位于细胞质膜上的非分泌蛋白;蛋白家族含有保守的N末端结构域,二级结构与拟南芥PIN蛋白相似;进化结果表明麻疯树PIN基因与毛果杨PIN基因家族关系最近;表达分析发现了4个可信度较高的麻疯树PIN基因,密码子偏好性分析确定了13个高频密码子,揭示了异源表达JcPIN时需要改造的密码子。研究结果可为将来开展麻疯树PIN基因家族的功能研究奠定重要基础,也为麻疯树其他基因家族和其他拥有大量数据的植物基因家族研究提供参考。  相似文献   

Effect of Spraying BN-2 Auxin on Olive Fruit Setting During the Blooming Period     

宗亦臣  俞宁  刘兴臣 《勤云标准版测试》2005,(4)

对皮削利(Picholine)、莱星(Leccino)、佛奥(Frantoio)3个油橄榄品种进行了盛花期喷施植物生长调节剂BN-2的试验,结果表明,不同品种对植物生长调节剂的反应不同:盛花期施用BN-23#(25μl/L)可显著提高皮削利的座果率;BN-24#(5μl/L显著提高莱星座果率;BN-23#和BN-24#均不能显著提高佛奥的座果率。  相似文献   

生长素在烤烟钾素库源关系改变时对根系呼吸作用生理指标的影响   总被引：9，自引：0，他引：9  

洪丽芳  苏帆  付利波  梁颖  瞿兴  田育天  刘武定 《中国农业科学》2003,36(12):1604-1608

 采用土培试验方法 ,研究生长素在烤烟库源关系改变时对根系吸钾的影响机制。结果表明 ,与常规措施(打顶 )相比 ,生长素处理促进了根系的发育 ,增加了根的重量 ,提高了根系活力 ,增强了根系的代谢能力。同时能提高根系ATP的含量 ,为根系吸收养分提供充分的能量保证。生长素还能提高根系线粒体Na K ATP酶活性 ,促进钾的跨膜主动吸收。试验中发现生长素能提高根系核酸的含量。试验还证明 ,中部叶成熟后 ,生长素的效果随涂抹时间的延长而逐渐减弱  相似文献   

Improving ‘Bing’ sweet cherry fruit quality with plant growth regulators   总被引：1，自引：0，他引：1  

Caixi Zhang  Matthew D. Whiting 《Scientia Horticulturae》2011

Final fruit diameter is the prime determinant of sweet cherry fruit value. Previous research has shown that mesocarp cell size accounts predominantly for variability in final fruit size, within a genotype. Our research program evaluated the potential to improve sweet cherry fruit size/weight with growth regulators to affect cell division and/or cell expansion stages. In the current study we screened 8 plant growth regulators (PGRs), including cytokinins, gibberellins, and auxins, and their combinations for their ability to increase ‘Bing’ fruit weight. Each PGR was mixed in lanolin paste and applied to fruit pedicels at 9 or 30 days after full bloom (DAFB), to coincide with estimated peak in cell division and cell expansion activity, respectively. Several cytokinins applied 30 DAFB improved fruit weight significantly (ca. +15%) with N-(2-Chloro-4-pyridyl)-N′-phenylurea (CPPU) and 6-(3-hydroxybenzylamino) purine (mt-Topolin) at 100 mg l⁻¹ being the most effective. Gibberellins, applied alone, improved fruit size and delayed fruit maturation and exocarp coloration. GA₃ at 200 mg l⁻¹ applied at 9 DAFB was the most effective and improved final fruit weight by 15%. Fifty-six percent of the fruit from this treatment were ≥9 g compared to 15% of similar weight fruit from untreated limbs. Both GA₃ and GA_4/7 treatments applied 9 DAFB increased fruit radial expansion. 4-Chlorophenoxyacetic acid, a synthetic auxin, also stimulated higher fruit growth rates at stage I and stage II, and fruit color development, but did not improve final fruit size.  相似文献