共查询到19条相似文献,搜索用时 578 毫秒
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从解剖学角度观察了草原樱桃绿枝扦插和硬枝扦插不定根的发育过程。结果表明:草原樱桃绿枝扦插需要30 d左右产生不定根,硬枝扦插需要40~50 d产生不定根;愈伤组织产生前,绿枝和硬枝插穗内没有发现根原基,后期在愈伤组织内发现根原基,进而发育成不定根。插穗只在愈伤组织上长出了不定根,而皮孔中没有不定根发出,可见草原樱桃插条内不形成根原基,根原基是在扦插后形成的愈伤组织中分化出来的,属诱发型根原基。 相似文献
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板栗嫩枝扦插生根解剖学特征研究 总被引:30,自引:0,他引:30
板栗插条不定根原始体为诱生根原始体。不定奶原基起源于维管不形成层细胞或紧靠维管形成层初生韧皮部中的薄壁细胞。愈伤组织不形成不定根原基,其中有些细胞分化为厚壁细胞。试验中发现有极少数不定根从愈伤组织长出,但其根原基原仍然是维管形成层细胞或紧管维管形成层初生韧皮部中的薄壁细胞。不定根上的侧根起源于柱鞘细胞。 相似文献
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桃硬枝插条内源激素(ABA、IAA)含量变化对生根的影响 总被引:13,自引:0,他引:13
对桃硬枝插条于贮藏期间和生根时内源激素的变化进行了研究。结果表明,低温(0—5℃)贮藏期间桃硬枝插条内ABA含量持续下降。在愈伤组织和根原基形成过程中,内源生长素(IAA)含量下降,在根突出前,内源生长素含量上升达高峰,根突出后又下降。在整个生根期间ABA含量持续下降。 相似文献
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桃砧木组织培养和扦插生根的解剖学观察 总被引:2,自引:0,他引:2
【目的】研究桃砧木茎尖快繁和扦插过程中不定根发生及发育解剖学特征。【方法】以桃砧木‘中桃抗砧1号’组培嫩梢和扦插枝条为试材,诱导其生根,通过常规石蜡切片法制片,对其生根部位进行解剖学观察。【结果】1)生根处理前,组培苗和插穗内均未发现潜伏根原基,生根处理后,2者均产生不定根原基。2)生根处理后,插穗内不定根原基在皮层、韧皮部、木质部中均可形成。3)不定根原基诱导后,有的不定根皮层结构中无中柱出现,有的分化出多个中柱,部分中柱与茎基部维管组织连通。【结论】‘中桃抗砧1号’的不定根原基为诱导型根原基,且属于多位点发生。 相似文献
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采用同一基质、不同生根剂进行具鳞水柏枝硬枝扦插育苗对比试验。结果表明:不同生根剂对插穗生根影响不存在显著性差异。秋季温室苗床扦插较易生根,插穗不需要特殊处理就可生根成活,成活率达93.50%,且根质好,根系分布均匀,而且经济实惠。 相似文献
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R. Raji 《The Journal of Horticultural Science and Biotechnology》2016,91(3):292-298
Ceylon olive (Elaeocarpus serratus L.; family Elaeocarpaceae) is an under-utilised edible fruit tree that is sparsely distributed in the southern peninsula of the Indian sub-continent. Fresh and ripened fruit are edible and are used to prepare value-added products such as squash, jams and pickles. Methods to produce clonal E. serratus plants using softwood cuttings, air-layers, and grafts were investigated. Softwood cuttings were collected during the wet summer season (June–August) and showed 96.7% rooting success following 2.5 mM indole-3-butyric acid (IBA) treatment for 3 h. Hardwood cuttings collected during the wet summer season and subjected to IBA treatment failed to root. The duration of the auxin treatment significantly influenced the rooting percentage of softwood cuttings. Seasonal variations in the rooting response of softwood cuttings was also noted. The wet summer (June–August) was the best season for rooting softwood cuttings. Air-layers of hardwood branches, prepared during the wet summer season by pre-treating with 7.5 mM IBA resulted in 87.1% rooting. The spliced grafting technique could be applied also to elite Ceylon olive clones, with 70% and 50% survival rates of softwood and hardwood grafts, respectively. Ceylon olive could therefore be cloned by adopting these methods. Propagation based on softwood cuttings would facilitate moderate-scale cloning of this valuable, elite germplasm. 相似文献
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G. E. Gergoff Grozeff M. De Los Á. Romero M. Aubone Videla 《The Journal of Horticultural Science and Biotechnology》2018,93(2):175-184
The production of plants for high density fruit orchards requires a highly efficient clonal propagation method. ‘Ferdor Julior’ rootstock is well adapted to different soil conditions, but its natural rooting potential is very limited. Propagation treatments, such as bottom heat and indole-3-butyric acid (IBA) applications have previously been used to improve rooting. The aim of this work is to evaluate the effects of either IBA, or sodium nitroprusside (SNP; a nitric oxide (NO) donor), or a combination of both on the rooting of hardwood cuttings of ‘Ferdor Julior’. As metabolism markers, ascorbic acid (AA) and glutathione (GSH) were measured in adventitious roots. ‘Ferdor Julior’ hardwood cuttings were treated as follows: untreated, 0.3 mM IBA, 1 mM SNP, 1 mM SNP previously exposed to light (as a negative control), and 1 mM SNP + 0.3 mM IBA. After 4 months, the combined use of SNP and IBA had increased root growth and lateral rooting, but resulted in less shoot growth, whilst AA and GSH concentrations were also reduced. IBA and SNP individual treatments showed intermediate results, compared to untreated cuttings. According to the results obtained, there may be an additive effect of auxin and NO signaling pathways. In conclusion, this new and promising technique for ‘Ferdor Julior’ propagation could improve lateral root development and promote early lateral root growth. 相似文献
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不同因子对盆栽八仙花扦插生根的影响 总被引:1,自引:0,他引:1
以1a生八仙花枝条为试材,研究了扦插基质、扦插部位、扦插时期及不同浓度萘乙酸对八仙花扦插生根的影响,以期为八仙花规模化、集约化生产提供科学依据。结果表明:草炭∶珍珠岩为1∶1的基质配比最适宜嫩枝扦插,成活率96.1%;留叶数量为1的插穗最适合半木质化枝条的扦插;半木质化枝条最适宜八仙花扦插,根部发育状况最好;6~7月为最适宜扦插时期,生根率为98.2%~98.6%;150mg/L NAA处理八仙花插穗的生根率最高,达93.3%。 相似文献