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1.
Plastids of nongreen tissues import carbon as a source of biosynthetic pathways and energy, and glucose 6-phosphate is the preferred hexose phosphate taken up by nongreen plastids. A cDNA clone encoding glucose 6-phosphate/phosphate translocator (GPT) was isolated from a cDNA library of immature seeds of rice and named as OsGPT. The cDNA has one uninterrupted open reading frame encoding a 42 kDa polypeptide possessing transit peptide consisting of 70 amino acid residues. The OsGPT gene maps on chromosome 8 of rice and is linked to the quantitative trait locus for 1000-grain weight. The expression of OsGPT is mainly restricted to heterotrophic tissues. These results suggest that glucose 6-phosphate imported via GPT can be used for starch biosynthesis in rice nongreen plastids. 相似文献
2.
Plastids of nongreen tissues import carbon as a source of biosynthetic pathways and energy, and glucose 6-phosphate is the
preferred hexose phosphate taken up by nongreen plastids. A cDNA clone encoding glucose 6-phosphate/phosphate translocator
(GPT) was isolated from a cDNA library of immature seeds of rice and named asOsGPT. The cDNA has one uninterrupted open reading frame encoding a 42 kDa polypeptide possessing transit peptide consisting of
70 amino acid residues. TheOsGPT gene maps on chromosome 8 of rice and is linked to the quantitative trait locus for 1000-grain weight. The expression ofOsGPT is mainly restricted to heterotrophic tissues. These results suggest that glucose 6-phosphate imported viaGPT can be used for starch biosynthesis in rice nongreen plastids.
Project supported by National Natural Scienc Foundation of China (No.39830250) and Natural Science Foundation of Zhejiang
Province (No.2A0106), China. The nucleotide sequence data will appear in the GenBank under accession number AF375053. 相似文献
3.
Appressorium formation is an important event in establishing a successful interaction between the rice blast fungus, Magnaporthe oryzae, and its host plant, rice. An understanding of molecular events occurring in appressorium differentiation will give new strategies to control rice blast. A quick and reliable method to extract total RNA from appressorium is essential for studying gene expression during appressorium formation and its mechanism. We found that duplicate film is an efficient substratum for appressorium formation, even when inoculated with high density conidia. When inoculated with conidia at 1×106ml-1, the percentages of conidium germination and appressorium formation were (97.98±0.67)% and (97.88±0.45)%, respectively. We applied Trizol before appressorium collection for total RNA isolation, and as much as 113.6 pg total RNA was isolated from the mature appressoria at 24 h after inoculation. Functional analysis of two genes, MNH6 and MgATG1, isolated from the cDNA subtractive library, revealed that the quantity of RNA was good enough to construct a cDNA (complementary DNA) library or a cDNA subtractive library. This method may be also applicable for the appressorium RNA isolation of other pathogenic fungi in which conidia differentiate into appressoria in the early stages of host infection. 相似文献
4.
孙亮先 《泉州师范学院学报》2004,22(2):94-99
对GenBank中9215条来源于水稻(Oryza sativa L.ssp．Indica)胚乳cDNA库的3’EST进行了分析，获得20个淀粉合成相关基因的表达丰度信息，研究发现淀粉合成的5个关键酶的编码基因，ADPG焦磷酸化酶基因、ADP—葡萄糖淀粉合成酶、淀粉分支酶、淀粉去分支酶、蜡质基因的表达丰度极高，表明该时期水稻胚乳内淀粉合成反应非常强烈，研究发现在淀粉合成途径中存在功能相关的基因协同表达的现象，章结合所获得的基因表达信息对淀粉合成的分子机理进行了探讨。 相似文献
5.
陈礼洪郭娜妹颜丽红武江南刘欣汝 《福建工程学院学报》2020,(4):393-398
采用均匀共沉淀法合成镁铝层状双氢氧化物,并加入葡萄糖得到改性材料MgAl-C-LDHs,以XRD、FTIR、N2吸脱附表征材料,通过静态吸附实验测试其对磷酸盐的吸附容量,结合吸附等温线模型和吸附动力学模型解析吸附过程。实验表明:改性后的MgAl-C-LDHs比MgAl-LDHs的比表面积提高16%,对磷的吸附容量提高19%。朗缪尔模型能更好描述MgAl-LDHs对磷酸盐的吸附行为,MgAl-LDHs表面相对均匀,吸附以单层吸附为主?弗兰德里希模型能更好描述MgAl-C-LDHs对磷酸盐的吸附行为,MgAl-C-LDHs对磷酸盐以多层吸附为主。MgAl-LDHs和MgAl-C-LDHs对磷酸盐的吸附与伪二级动力学吸附模型更吻合,吸附过程均主要受化学吸附控制。 相似文献
6.
Xin-chun Zhang Xin Yu Hui-juan Zhang Feng-ming Song 《Journal of Zhejiang University. Science. B》2009,10(10):731-739
We cloned and characterized a rice gene OsBIABPI encoding an AMP-binding protein. The full-length cDNA of OsBIABP1 is 1912-bp long and is predicted to encode a 558-aa protein. OsBIABP1 contains a typical AMP-binding signature motif and shows high similarity to members of AMP-binding protein family. OsBIABP1 is expressed in stems, leaves and flowers of rice plants, but is not expressed, or expressed at a very low level, in rice roots. The expression of OsBIABP1 was induced by some defense-related signal molecules, e.g., salicylic acid (SA), benzothiadiazole, jasmonic acid (JA), and 1-amino cyclopropane-1-carboxylic acid, which mediate SA-and JA/ethylene (ET)-dependent defense signaling pathways, respectively. Furthermore, the expression of OsBIABP1 is activated by the infection of Magnaporthe oryzae, and the induced expression is quicker and stronger during early stages of pathogenesis in incompatible interaction than that in compatible interaction between rice and M. oryzae. Our results suggest that OsBIABP1 may be a defense-related AMP-binding protein that is involved in the regulation of defense re-sponse through SA and/or JA/ET signaling pathways. 相似文献
7.
A mature appressorium cDNA library of rice blast fungus, Magnaporthe grisea, was constructed in a λTriplEx2 vector by SMART?cDNA library containing 2.37×106 independent clones about 100% of which harbor foreign cDNA inserts with average size of 660 bp. Of 9 randomly 相似文献
8.
We prepared cold-setting cement with metakaolin from kaolin dehydrated at 800 ℃ and phosphate, and studied the phase composition, microstructure and setting reaction mechanism of the cementing material by means of infrared spectroscopy, thermogravimetry, X-ray diffraction, and scanning electron microscopy. The metakaolin-phosphate cement is predominantly amorphous, where the phases responsible for chemical setting are mainly amorphous aluminophosphate hydrates. The reactivity of metakaolin depends on the particle size. Metakaolin particles of 1.75 μm in D50 have an acid dissolution index up to 18.45%, and the reaction with phosphate at room temperature to form metakaolin-phosphate cement takes only 6 h. The so obtained cement shows a compressive strength of 92.5 MPa after 7 d and keeps its amorphous phase at 1 000 ℃, demonstrating better bonding and mechanical properties and higher stability at a medium or high temperature. 相似文献
9.
Yang RN Ye F Cheng LJ Wang JJ Lu XF Shi YJ Fan HS Zhang XD Bu H 《Journal of Zhejiang University. Science. B》2011,12(7):582-590
The osteoinduction of porous biphasic calcium phosphate ceramics (BCP) has been widely reported and documented, but little
research has been performed on rodent animals, e.g., mice. In this study, we report osteoinduction in a mouse model. Thirty
mice were divided into two groups. BCP materials (Sample A) and control ceramics (Sample B) were implanted into the leg muscle,
respectively. Five mice in each group were killed at 15, 30, and 45 d after surgery. Sample A and Sample B were harvested
and used for hematoxylin and eosin (HE) staining, immunohistochemistry (IHC) staining, and Alizarin Red S staining to check
bone formation in the biomaterials. Histological analysis showed that no bone tissue was formed 15 d after implantation (0/5)
in either of the two groups. Newly-formed bone tissues were observed in Sample A at 30 d (5/5) and 45 d (5/5) after implantation;
the average amounts of newly-formed bone tissues were approximately 5.2% and 8.6%, respectively. However, we did not see any
bone tissue in Sample B until 45 d after implantation. Bone-related molecular makers such as bone morphogenesis protein-2
(BMP-2), collagen type I, and osteopontin were detected by IHC staining in Sample A 30 d after implantation. In addition,
the newly-formed bone was also confirmed by Alizarin Red S staining. Because this is the report of osteoinduction in the rodent
animal on which all the biotechnologies were available, our results may contribute to further mechanism research. 相似文献
10.
11.
[目的]新的大肠癌相关性抗原EID3的基因克隆及其诊断价值研究.[方法]利用大肠癌病人体内血清中所含的对肿瘤抗原产生的特异性抗体筛选睾丸组织cDNA噬菌体表达文库和大肠癌组织cDNA噬菌体表达文库(SEREX),并用RT-PCR技术研究EID3 mRNA在正常组织和大肠癌传代细胞表达.[结果]睾丸组织cDNA噬菌体表达文库筛选得到了可以诱导大肠癌病人抗体免疫应答的新抗原EID3基因(Gen-bank NM_001008394.1).它们定位于染色体19q13.2,EID3含1个外显子.通过RT-PCR分析发现,EID3基因在43例大肠癌传代细胞株中,39例阳性,阳性率为90.7%.在正常组织中,除睾丸组织外不表达或有极低水平转录.[结论]EID3 mRNA表达检测用于诊断大肠癌,可能具有高特异性和高敏感性的特点.EID3蛋白被首次发现在大肠癌病人中能够诱导机体的抗体免疫应答,为一个新的大肠癌相关性抗原分子.其功能可能与抑制细胞的恶性增殖相关,并可进一步研究其用于治疗和诊断大肠癌的可行性. 相似文献
12.
探讨了利用白云石和工业磷酸合成磷酸钙磷酸镁复合物的理论依据,分析了影响合成的工艺因素,讨论了钙镁合量与磷的摩尔比(Ca+Mg)/P、磷酸加入速率、合成温度和保温时间对合成的影响。实验结果表明,合成磷酸钙磷酸镁复合物的最佳工艺参数为:钙镁合量与磷的摩尔比(Ca+Mg)/P1.60,磷酸加入速率2mL/min,合成温度1 050℃,保温时间40min。 相似文献
13.
生肌决定因子 MyoD 是生肌调节因子 MRFs 家族的一个重要成员,在基因转录调控中起着重要的作用.本实验通过 RT-PCR 和3’-RACE 等方法,以松江鲈肌肉总 RNA 为模板,扩增出957 bp 的 MyoD 基因部分序列,包含部分编码区长567 bp,编码翻译188个氨基酸残基,3’-UTR 区长390 bp.系统发育分析表明,松江鲈 MyoD 与奥尼罗非鱼亲缘关系最近.不同组织半定量分析显示,松江鲈 MyoD 在各种组织中均有表达,在心脏中表达量最高,预示着在不同组织中该基因的功能广泛 相似文献
14.
Antioxidant and antidiabetic properties of tartary buckwheat rice flavonoids after in vitro digestion 总被引：2，自引：0，他引：2
Tao Bao Ye Wang Yu-ting Li Vemana Gowd Xin-he Niu Hai-ying Yang Li-shui Chen Wei Chen Chong-de Sun 《Journal of Zhejiang University. Science. B》2016,17(12):941-951
Oxidative stress and diabetes have a tendency to alter protein, lipid, and DNA moieties. One of the strategic methods used to reduce diabetes-associated oxidative stress is to inhibit the carbohydrate-digesting enzymes, thereby decreasing gastrointestinal glucose production. Plant-derived natural antioxidant molecules are considered a therapeutic tool in the treatment of oxidative stress and diabetes. The objective of this study was to identify tartary buckwheat rice flavonoids and evaluate the effect of in vitro digestion on their antioxidant and antidiabetic properties. High performance liquid chromatography (HPLC) analysis indicated the presence of rutin as a major component and quercitrin as a minor component of both digested and non-digested flavonoids. Both extracts showed a significant antioxidant capacity, but digested flavonoids showed reduced activity compared to non-digested. There were some decreases of the antioxidant activities (2,2′-azino-bis-(3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt (ABTS), 2,2-diphenyl-1-picrylhydrazy (DPPH) radical, and ferric reducing antioxidant power (FRAP)) of digested tartary buckwheat rice flavonoids compared with non-digested. Flavonoids from both groups significantly inhibited reactive oxygen species (ROS) production and α-glucosidase activity. Both digested and non-digested flavonoids markedly increased glucose consumption and glycogen content in HepG2 cells. Tartary buckwheat rice flavonoids showed appreciable antioxidant and antidiabetic properties, even after digestion. Tartary buckwheat rice appears to be a promising functional food with potent antioxidant and antidiabetic properties. 相似文献
15.
影响方解石去除水体中高浓度磷酸盐的因素 总被引：1，自引：0，他引：1
通过探讨方解石去除水体中高浓度磷酸盐的影响因素,为能够有效地对工业废水中磷酸盐污染物进行深度处理提供理论基础。研究了典型pH值条件下以及水体中可能存在的其他离子对方解石去除磷效率的影响。结果表明,pH值显著影响方解石对高浓度磷的去除,当pH=6.0时,方解石溶解游离出的Ca2＋与水体中的H2PO4-形成磷酸钙的沉淀,同时溶液中的其他离子（例如Mg2＋,SO42-,NH4＋和草酸）对方解石去除磷起到抑制作用。当pH=10.0时,方解石对磷的去除主要以吸附过程为主,溶液中的Mg2＋对方解石去除磷有促进作用,NH4＋与草酸都对其有抑制作用,而SO42-的影响作用不明显。当Mg2＋和NH4＋共存时,通过生成磷酸铵镁沉淀物与方解石共同去除水体中的磷。 相似文献
16.
开发了一个新的综合化学实验,在该实验中对合成磷酸锌锂的新方法进行了研究,基于均匀设计试验方案以及数据挖掘技术的应用,研究了研磨时间、保温时间、保温温度对磷酸锌锂晶体合成的影响。XRD表征的结果表明,用最佳工艺条件合成得到的产物为63 nm的LiZnPO4,且产物产率高达99.5%。故实验成功地同时优化控制了磷酸锌锂的组成及产率,从而得到比较纯净的,结晶态的磷酸锌锂晶体。 相似文献
17.
谷胱甘肽S-转移酶（glutathione S-transferases ,GSTs）在昆虫代谢各种内源和外源性有害化合物的过程中起关键作用。重要水稻害虫稻纵卷叶螟（Cnaphalocrocis medinalis）的GST基因目前尚无研究。本实验克隆了一个稻纵卷叶螟delta家族GST基因的全长cDNA序列,命名为CmGSTd3（Genbank登录号KM433686）。CmGSTd3包含681 bp的开放阅读框,编码一个由226个氨基酸组成的蛋白。CmGSTd3蛋白是一个胞质GST ,与已知的昆虫delta家族GST 具有较高的同源性。在系统进化分析中,CmGSTd3与家蚕的delta家族GST聚在同一进化分支上。实时荧光定量PCR结果显示,CmGSTd3基因在稻纵卷叶螟幼虫阶段表达量最高,且主要表达于幼虫的中肠和脂肪体,由此推测其可能参与了体内异源毒物的代谢。本研究为探索CmGSTd3的生理功能奠定了前期基础。 相似文献
18.
本文报道近三年安徽农业技术师范学院新生动型肝炎病毒感染调查结果。受检学生1628人，乙型肝炎表面抗原阳性率为10～12％，谷丙转氨酶异常率为4～6％，西指标均异常为0．9～1．5％。 相似文献
19.
孙亮先 《泉州师范学院学报》2006,24(2):83-88
基因表达系列分析(Serial analysis of gene expression,SAGE)是功能基因组学研究中的一项功能强大的工具.对水稻幼苗SAGE文库的构建进行了探索试验,其主要操作步骤为:以磁珠法提取PolyA mRNA用于合成双链cDNA,再经过一系列的酶切、加接头序列、连接、PCR扩增,获得到26-bp的水稻双标签体,再将26-bp Ditag连接成标签链接体,并将其克隆进pZero-1载体中用于测序.DNA测序结果证明获得了水稻的SAGE标签.试验的各个中间步骤的结果均经过PCR验证.yh 相似文献
20.
Expression and purification of recombinant human serum albumin from selectively terminable transgenic rice 总被引：1，自引：1，他引：0
Qing ZHANG Hui YU Feng-zhen ZHANG Zhi-cheng SHEN 《Journal of Zhejiang University. Science. B》2013,14(10):867-874
Human serum albumin(HSA) is widely utilized for medical purposes and biochemical research.Transgenic rice has proved to be an attractive bioreactor for mass production of recombinant HSA(rHSA).However,transgene spread is a major environmental and food safety concern for transgenic rice expressing proteins of medical value.This study aimed to develop a selectively terminable transgenic rice line expressing HSA in rice seeds,and a simple process for recovery and purification of rHSA for economical manufacture.An HSA expression cassette was inserted into a T-DNA vector encoding an RNA interference(RNAi) cassette suppressing the CYP81A6 gene.This gene detoxifies the herbicide bentazon and is linked to the 5-enolpyruvylshikimate-3-phosphate synthase(EPSPS) cassette which confers glyphosate tolerance.ANX Sepharose Fast Flow(ANX FF) anion exchange chromatography coupled with Butyl Sepharose High Performance(Butyl HP) hydrophobic interaction chromatography was used to purify rHSA.A transgenic rice line,HSA-84,was obtained with stable expression of rHSA of up to 0.72% of the total dry weight of the dehusked rice seeds.This line also demonstrated high sensitivity to bentazon,and thus could be killed selectively by a spray of bentazon.A two-step chromatography purification scheme was established to purify the rHSA from rice seeds to a purity of 99% with a recovery of 62.4%.Results from mass spectrometry and N-terminus sequencing suggested that the purified rHSA was identical to natural plasma-derived HSA.This study provides an alternative strategy for large-scale production of HSA with a built-in transgene safety control mechanism. 相似文献