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SC_9-4是以植物油为原料研制成功的一种高速冷轧工艺润滑油。经武钢高速冷轧机轧制性能鉴定,它的高速轧制性能优于棕榈油。我们使用高效液相色谱比较分析鉴定了SC_9-4和棕榈油的甘油三酯组成。分析结果:SC_9-4:的主要甘油三酯是POP(42.8%)和PPP(14.6%),而棕榈油的主要甘油三酯是POP(31.3%)、POO(20.1%)、PLP(12.2%)和PLO(11.6%)。我们初步探讨甘油三酯组成与轧制性能关系认为,SC_9-4的高速轧制性能优于棕榈油,可能是和SC_9-4含PPP、PPS和PSS的含量(18.8%)高于棕榈油(9.9%)有关。 相似文献
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Distorted segregation and linkage of alcohol dehydrogenase genes in Camellia japonica L. (Theacease)
Alcohol dehydrogenase isozymes in Camellia japonica are encoded by two genes, Adh-1 and Adh-2. Both loci are expressed in seeds, and their products randomly associate into intragenic and intergenic dimers. Electrophoresis of leaf extracts reveals only the products of Adh-2. Formal genetic analysis indicated that the two Adh loci are tightly linked (combined estimate of r=0.004). Most segregations fit expected Mendelian ratios, but in some families distorted segregation was observed at Adh-1, Adh-2, or both loci. The deficient progeny class varied across families, and in two apparent backcrosses three rather than two phenotypic classes were recovered. The mechanism underlying these distortions is not known, but evidence is presented that suggests that the phenomenon is genic or segmental in nature. Plausible hypotheses include linkage of the Adh structural genes with a gametophytic self-incompatibility locus, translocation heterozygosity involving the segment bearing Adh-1 and Adh-2, or a combination of these two mechanisms. 相似文献
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湿地松(Pinus elliottii)是阳性乔木,茶树(Camellia sinensis)是阴性灌木。这两种树种间作,形成针阔、乔灌两层树冠结构的茶园复合生态系统,可以改善茶树生态条件,提高茶叶的产量和品质。但间作存在胁地现象。一般认为这是上层树木的过度遮荫和根系间的竞争造成的。为了解这两种树种根系的分布状况和相互关系,并为间作茶园的合理配置和加强这种茶园的耕作管理提供依据,我们进行了湿地松与茶树间作根系分布状况的研究。 相似文献
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Summary A polyclonal antibody against -1,3-glucan, callose, extracted from the pollen tube wall ofCamellia japonica was raised in mice and, using it as a probe, the localization of callose in the germinated pollen was studied. By confocal laser scanning microscopy, callose was found in the tip region of the pollen tube and the tube wall; the immuno-fluorescence in the tube wall was less toward the base of the tube. In contrast, the tip region did not fluoresce although the whole of the tube wall did strongly with aniline blue, the specific dye for callose. Immuno-electron microscopy showed that callose was also found in Golgi vesicles which concentrated in the tip region of the pollen tube, the inner layer of the tube wall, callose plugs, and Golgi vesicles in the pollen grain. Immuno-gold labeling was often detected on the fibrous structures in Golgi vesicles and callose plugs. Based on these results, the participation of Golgi vesicles in the formation of the tube wall and callose plugs was discussed.Abbreviation TBS
Tris-buffered saline
- Tris
Tris(hydroxy-methyl)-aminomethane
- PBS
phosphate-buffered saline
- BSA
bovine serum albumin
- ELISA
enzyme-linked immunosorbent assay
- CLSM
confocal laser scanning microscopy
- DP
degree of polymerization 相似文献
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金花茶(Camellia petelotii)的小孢子单核期花药,经培养和继代培养6个月后的愈伤组织中,发现有少量体细胞进行减数分裂。在减数第一和第二次分裂中,同源染色体的配对和分离基本正常,最后形成四分体。该愈伤组织经石蜡切片和压片观察,发现其主要由大量的液化细胞和贮藏细胞所组成,此外,还有少部分分生细胞。没有发现进一步的分化。其染色体数目,2n=30者占71.7%其余则为非整倍体。 相似文献
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动物传粉在全球生态系统中提供重要服务,全球农业生产对动物传粉服务的需求稳定增长。油茶是我国特有的重要木本油料植物,栽培历史悠久,由于严格自交不亲和而高度依赖动物传粉。基于我国油茶产业发展的新形势,从资源分配和花粉限制等生态因素系统分析了油茶产量受限制的原因,提出油茶的传粉者限制效果等同于花粉限制效果,人工引入潜在的高效传粉者是解除油茶资源限制措施和传粉生态限制措施之间冲突、提高油茶产量的有效途径。论述了人工引入传粉者传粉服务的优势和挑战。对人工引入传粉者,特别是外来传粉者所面临的潜在风险和控制途径进行了梳理,提出从传粉生态服务解决油茶产量和质量问题的新思路。全文旨在为人工引入传粉者在油茶丰产中的作用提供理论与科学依据,以期促进油茶产业健康有序发展。 相似文献
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Factors controlling somatic embryogenesis 总被引:5,自引:0,他引:5
Histological and ultrastructural, molecular and elemental distribution changes were investigated during the induction of direct somatic embryogenesis using theCamellia japonica leaf culture system. In this culture system, direct somatic embryogenesis is induced in a controlled way in a specific leaf region (leaf blade) within a leaf. Embryogenic and non-embryogenic leaf regions have characteristic energy-dispersive X-ray spectra already before induction. According to these results electron probe X-ray microanalysis (EPMA) can be a tool for early diagnosis of embryogenic competence. Histological studies showed that severe fluctuations in the number of calcium oxalate crystals and in starch accumulation occur after induction but only in induced tissues. Changes in the cell wall composition of competent cells occur shortly after the induction treatment. The induction of morphogenesis is linked to the appearance of callose covering the surface cells of induced leaves and calluses. A 2nd deposition of material (cutin) is necessary for normal somatic embryogenesis to occur. The involvement of lipid transfer proteins in the appearance of cutin in the embryogenic regions of the explant is suggested. 相似文献