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虎尾兰(Sansevieria trifasciatavar.harnii)是龙舌兰科虎尾兰属植物,不但具有观赏价值,还有较高的营养价值,并且有净化空气的功效。为了在短时间内获得大量的虎尾兰植株,以短叶虎尾兰的叶片为外植体进行组织培养试验,采用组织培养育苗方法,建立从愈伤组织到再生植株的培养体系。结果表明,基本培养基为MS;诱导愈伤的最佳PGR浓度配比为1 mg·L-16-BA+0.5 mg·L-1NAA+0.5 mg·L-12,4-D;诱导芽的最佳PGR浓度配比为1 mg·L-16-BA+0.8 mg·L-1NAA;诱导生根的最佳PGR浓度为0.1 mg·L-1NAA。 相似文献
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以金边虎尾兰、月季与天竺葵为试材,研究不同生长调节剂及其浓度对3种园林植物扦插生根的影响。结果表明:金边虎尾兰叶基段以100mg/L浓度的IBA或NAA扦插效果较好,叶尖段以IBA 100~200mg/L或NAA 200mg/L扦插效果较好,生根率均达到100%;100~200mg/L浓度的IBA与100mg/L浓度的NAA对月季茎插生根效果较好,生根率达75.6%~77.8%;天竺葵茎插各处理的生根率均达到100%,但从平均生根数上比较,100mg/L NAA或25mg/L IBA对其扦插生根效果最佳,25~300mg/L的IAA对其生根数有抑制作用。 相似文献
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在金钱龟的人工养殖过程中,观察到部分个体发生了腐皮、肺炎、腹泻等疾病。通过对细菌的实验室诊断和生化特性鉴定,发现引起金钱龟腐皮和腹泻的病原体为嗜水气单胞菌,而肺炎则是由温度突变引起的感冒造成。因此,进一步研究了人工养殖条件下金钱龟的常见疾病与一些环境因子的关系。研究表明,温度差异对金钱龟的生理机能有显著的影响,而水质条件和养殖密度的调控也关系到金钱龟的健康生长,这也为金钱龟防治疾病及健康养殖模式提供一些参考依据。 相似文献
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三线闭壳龟、黄喉拟水龟、黄缘盒龟及其地方品系外部形态特征比较研究 总被引:1,自引:1,他引:0
本文首次对中国珍稀龟类三线闭壳龟(Cuora Trifasciata)、黄喉拟水龟(Mauremys mutica)、黄缘盒龟(Cistoclemmys flavomarginatas)及其地方品系的外部形态特征和差异进行了比较研究,为制定相应的龟类种质标准,保护和合理利用龟类资源提供技术资料。 相似文献
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黄喉拟水龟_三线闭壳龟_鳄龟的生长比较研究 总被引:24,自引:0,他引:24
本文对黄喉拟水龟、三线闭壳龟、鳄龟周年生长进行了研究与比较.在广州自然温度下,人工饲养黄喉拟水龟343d,平均体重由10.3g增到71.9g,生长率为4.37mg·g-·d-;三线闭壳龟343d,由15.6g增到68.2g,生长率为3.68mg·g-·d-;鳄龟363d,由m.8g增到263.1g,生长率为5.08mg·g-·d-1.即在生长速度上,鳄龟>黄喉拟水龟>三线闭壳龟.在周年生长中,三种龟体重、背甲长、背甲宽与日龄;背甲长与宽;背甲长、宽与体重;均有着显著的正相关关系.温度与龟的生长有密切关系,低温抑制龟的生长,其影响程度依次为黄喉拟水龟>三线闭壳龟>鳄龟.同等条件下,三种龟个体间生长有差异,差异大小为鳄龟>黄喉拟水龟>三线闭壳龟.饵料转化效果,鳄龟>黄喉拟水龟>三线闭壳龟.日粮需求,三线闭壳龟>黄喉拟水龟>鳄龟. 相似文献
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Asian turtles are overharvested for food, medicinal purposes and pets, and most species are now at risk of extinction (‘Asian turtle crisis’). As a result of high levels of trade, some species of Asian turtles are known to science mostly or only from animals found in trade. The Vietnamese box turtle (Cuora picturata) was described in 1998 and is known only from markets. This species is likely to be highly threatened, and identifying the origin of this “market species” is imperative if it is to be conserved. We used evidence from phylogeny, biogeography and trade patterns to focus field searches for this species, and in July 2010–January 2011 found it in the wild at three localities on the Langbian Plateau of southern Vietnam. This discovery provides the first opportunity to conserve the Vietnamese box turtle, and provides hope for determining the wild origin of other rare Asian turtles that remain known only from commercial trade. 相似文献
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以金边虎尾兰为试材,研究了IAA、NAA、6-KT和B9等植物生长调节剂对叶段进行预处理后(处理时间3 h)的扦插效应.结果表明:不同植物生长调节剂对金边虎尾兰叶段生根的影响不同,同一植物生长调节剂的浓度不同,对生根效果的影响也不同.其中,IAA以300mg/L效果最好;NAA以400 mg/L效果最好;6-KT以35 mg/L效果最好;B9以600mg/L效果最好. 相似文献
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Leaf blight is a common disease affecting Sansevieria trifasciata in many countries, including Malaysia. In the present study, Fusarium isolates were consistently recovered from the diseased leaves collected from various locations throughout the country. Based on morphology and multigene phylogenetic analysis using mitochondrial small subunit (mtSSU), intergenic spacer region (IGS) and translation elongation factor 1-α (TEF1-α) gene sequences, seven Fusarium species were identified, with F. oxysporum being the most prevalent (67.6%) among 34 isolates. Pathogenicity tests resulted in the discovery of pathogenic isolates that belonged to F. oxysporum, F. proliferatum, and F. pseudocircinatum, whereas all isolates of F. brachygibbosum, F. concentricum, F. mangiferae, and F. solani were nonpathogenic. The results suggest that several Fusarium species are accountable for causing disease on S. trifasciata in Malaysia. 相似文献