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柑橘红蜘蛛主要为害柑橘类植物,目前已是柑橘上的头等重要害虫,影响柑橘红蜘蛛大发生的因素较为复杂,有气候,人为等保方面的因素,但其中起主导作用的是气温和雨量。 相似文献
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张艳慧刘莹洁金鑫周彦 《果树学报》2017,(9):1213-1221
柑橘病毒类病害是由病毒、类病毒引起的严重危害世界柑橘产业的病害。随着柑橘产业的发展,新的柑橘病毒类病害不断出现,柑橘病毒类病害的危害也日趋严重。笔者对柑橘黄脉病、柑橘褪绿矮缩病、柑橘叶斑驳病、柑橘树皮裂纹类病毒、柑橘类病毒V和柑橘类病毒VI 6种我国近年来新发柑橘病毒类病害的发生分布、生物学特性和分子生物学特性进行总结,并对新发柑橘病毒类病害的检测和防治方法进行阐述,以期为我国柑橘产业的健康可持续发展提供借鉴。 相似文献
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瓯柑系芸香科柑橘属植物,是柑橘类中的传统名果。果形高圆或壶状,个较大、色橙黄、皮厚、味甘美而微苦是其特征,果实极耐贮藏,深受消费者喜爱且为国内外植物学者和柑橘专家的重视与关注。 相似文献
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正枳,又名枸橘、臭橘等,芸香科枳属植物,因其根系浅、须根发达、抗性强等特性,成为我国柑橘育苗中应用最多、最广的良种砧木,特别是甜橙类和宽皮柑橘类的优良砧木。近年来,通过陕南柑橘产区生产实践及走访调查发现,枳种实生苗在育苗过程中极易发生黄化现象,如不及时针对性处理,将导致砧 相似文献
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查尔酮的合成是类黄酮生物合成途径中的一个关键节点。从10个柑橘种质中克隆了查尔酮合成酶(chalcone synthase,CHS)基因,并对其不同时期的果实和叶片中的类黄酮含量进行了测定,分析了CHS基因的序列多态性与类黄酮含量之间的关系;同时通过qRT-PCR检测了CHS基因在不同种质之间以及同一种质的不同组织间的表达差异。结果表明,柑橘CHS基因的核苷酸序列高度保守,相似度达98%以上。聚类分析表明,CHS氨基酸序列的多态性有物种特异性,而且与类黄酮含量有一定的相关性。CHS基因的表达水平在不同种质、部位及生长发育时期有显著差异,这些差异与类黄酮的含量有显著的相关性,说明CHS基因对类黄酮的生物合成有明显影响。 相似文献
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柑桔VA菌根的研究进展——文献综述 总被引:8,自引:0,他引:8
综述了国内外对柑桔VA菌根研究的进展情况,VA菌根真菌的资源,菌根对植生长和营养效应,以及影响菌根发育的生态条件,并对生产应用的前景提出设想。 相似文献
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柑橘中挥发性物质以萜类为主,不仅影响植株与环境间的信号传递和赋予果实的香气,而且对消费者的感官体验及人体健康有多样的功能。对柑橘中挥发性萜类物质生物学功能、代谢谱的种质及组织特异性、合成途径相关基因及挥发性物质与柑橘分类等研究进展进行了综述。提出目前对柑橘挥发性萜类物质的研究仅限于代谢通路及代谢谱分析;在成分分析上多以游离态为主,糖苷等键合态的分析较少;已明确功能的结构基因及调控基因报道较少,香气品质的形成机理尚有待深入解析。展望未来,基础研究方面应重点揭示柑橘中挥发性萜类物质代谢的进化和演变规律、重要结构基因及转录因子调控机制等;生产应用中关注开发利用现有具特异香味种质、创制特殊香味新品种以及提升香气品质的栽培措施。 相似文献
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本文报道来自四川省26个县市的78份柑桔园土壤样本的植物线虫种类鉴定结果。共鉴定出16个种,其中新种3个:简阳根结线虫(Meloidogyne jianyangensis Yang,Hu & Chen)、合川沟环线虫(Ogma hechuanensis Hu & Zhu)、陈氏拟盘旋线虫(Rotylenchoides cheni n. sp. )。新纪录1个,即Rotyleachus devonensis Van de Berg。分别介绍了每个种的分类地位和分布地区,并明确柑桔根线虫(Tylenchulus semipenetrans Cobb)和简阳根结线虫可寄生于柑桔,而其他种的寄生性有待观察。 相似文献
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Sajjad Hussain Franck Curk Patrick Ollitrault Raphaël Morillon François Luro 《Scientia Horticulturae》2011
All commercial citrus rootstocks are polyembryonic and propagated by seeds. Although these seeds produce uniform plant material most of the time, zygotic or polyploid citrus seedlings may arise. The aim of this study was to understand how zygotic or tetraploid rootstock could affect a citrus rootstock selection field trial. A trifoliate orange selection field trial, which was planted in 1974 and grafted with clementine, was re-investigated with respect to the presence of rootstocks that were not true-to-type. Among the 288 trees investigated, flow cytometry identified 2.4% of rootstocks as tetraploid and SSR markers indicated that 6.6% were zygotic. Yield data showed that the presence of tetraploid rootstock dramatically decreased (by about 45%) clementine fruit production. However, zygosity did not always affect fruit production and a range of effects were observed, from a slight increase in production to a 24% decrease. Exclusion of non-true-to-type genotypes from the production analysis indicated that the best candidate for rootstock was a clone previously ranked in the middle of the 32 rootstocks under evaluation. However, the presence of zygotic rootstock did not appear to cause any significant differences in fruit quality during the first 5 years of the investigation, which suggests that non-true-to-type plants cannot be identified by fruit quality parameters. This study indicates that tetraploid and zygotic rootstocks have a strong impact on citrus fruit production in orchards, and removal of off-type seedlings is required prior to planting in any agronomic trial. 相似文献
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纽荷尔脐橙叶脉木栓化症病因诊断 总被引:4,自引:0,他引:4
经矿质营养诊断分析,纽荷尔脐橙叶片Mg含量与叶脉木栓化症的发病率、发病指数,以及病株叶片Mg含量与病株发病等级均呈显著负相关(porb〈0.05);病树叶片Mg含量0.022%-0.107%,均呈缺乏状态(〈0.2%),常叶与病叶Mg含量差异(0.12%)极显著(prob〈0.0001);病叶常伴有缺Mg症黄化,即叶基部绿色区呈“∧”形,病树未见僵果(“石头果”)或果实内有褐色胶状物等缺B症状。据此诊断本研究病例的病因为缺Mg,并表明缺B并非柑橘叶脉木栓化症的唯一病因。 相似文献
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The question of what determines plant community composition is fundamental to the study of plant community ecology. We examined
the relative roles of historical land use, landscape context, and the biophysical environment as determinants of plant community
composition in regenerating citrus groves in north-central Florida. Results were interpreted in light of plant functional
traits. Herbaceous and woody plants responded differently to broad-scale variables; herbs correlated most strongly with surrounding
land cover at a scale of 8 km, while the only significant determinant of woody species distributions was local land use history.
There were significant correlations between herbaceous species and spatial context, habitat isolation, environmental variables,
and historical variables. Partial Mantel tests indicated that each variable provided a unique contribution in explaining some
of the variation in the herbaceous dataset. The correlation between woody plants and local historical variables remained significant
even with other effects corrected for. In the herbaceous community, species composition was linked to functional traits much
as expected from classical theory. While spatial influences in our study system are important for both woody and herbaceous
plants, the primary determinant of plant community composition in regenerating citrus groves is historical land use. Our results
suggest that the fine-scale mechanisms of local competition, tolerance and facilitation invoked by many classical studies
may ultimately be less important than land use history in understanding current plant community composition in regenerating
agricultural areas. 相似文献
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柑桔(Citrus Linn)是一种热带和亚热带植物,它是我国南方重要的经济作物。柑桔的产量和品质与多种因子相联系。这些因子是:生产对象、环境因子和人为因子。本文讨论了柑桔品质与上述因子之间的相互关系,以及提高我国柑桔果实品质的方法。为了提高我国柑桔果实的品质,作者建议:(1)选择生态环境适宜的地区栽培柑桔;(2)选育和推广柑桔良种;(3)采取各种有效措施改造桔园生态环境,诸如搞好桔园基本建设,营造桔园防护林和应用合理的栽培技术等。 相似文献