共查询到20条相似文献,搜索用时 31 毫秒
1.
花粉发育的转录组研究进展 总被引:2,自引:1,他引:2
在受精过程中花粉通过其极性生长的花粉管将精细胞运送到胚囊启动双受精,除了在有性生殖过程中的重要作用外,花粉及其极性生长的花粉管也是研究植物生长发育的重要模式材料。随着模式植物拟南芥和水稻基因组测序的完成,在基因组水平上揭示花粉发育以及花粉管极性生长的分子基础已成为可能。经过最近几年的研究已初步明确了花粉转录组特征。本文主要讨论了拟南芥花粉转录组学的研究进展,以期帮助读者对花粉发育的研究有全面了解。 相似文献
2.
近年来,转录组测序技术在动物重要经济性状受复杂基因网络的调控研究领域取得了显著的成果。作为哺乳动物皮肤的衍生物,毛囊是唯一具有高度自我更新能力、独特的可再生器官,毛囊细胞经增殖分化最终形成毛发。已有的研究表明,诸多生长因子及其受体作为体内分泌协调基因的重要因素,对毛发的生长发育起着重要的调控作用。文章综述了近年来转录组测序技术在人、小鼠及羊等生物的皮肤毛囊发育和再生过程中基因调控方式的研究进展,旨在为今后人工干扰绒毛周期生长发育和分子育种提供理论依据,同时也为皮肤毛囊相关疾病的临床治疗提供新思路。 相似文献
3.
【目的】青海门源油菜耐寒冷、抗性强,其花粉积累了丰富的类黄酮物质,该研究可为提高黄酮醇含量的基因工程育种提供参考依据。【方法】研究采用转录组测序技术从青海门源油菜花粉和河南郑州油菜花粉筛选差异表达的黄酮醇合成酶基因,并对BpFLS基因进行生物信息学分析和RACE-PCR克隆。【结果】(1)筛选出6个差异表达的油菜花粉黄酮醇合成酶基因,BpFLS1-1基因在青海门源油菜花粉中差异最大且表达上调。(2)BpFLS1-1基因编码的氨基酸序列具有黄酮醇合成酶活性和黄烷酮-3-羟化酶活性。(3)BpFLS1-1基因可能含有新的蛋白质编码区序列,其长度为1 170 bp。【结论】BpFLS1-1基因在门源油菜花粉积累丰富的类黄酮物质及油菜抗逆性方面发挥重要功能。 相似文献
4.
单细胞转录组分析以单个细胞为特定研究对象,提取mRNA进行逆转录、放大和高通量测序分析,能揭示该细胞内整体水平的基因表达状态和基因结构信息,准确反映细胞间的异质性,深入理解其基因型和表型之间的相互关系,在发育生物学、基础医学、临床诊断和药物开发等领域都发挥重要作用.本文主要介绍了单细胞转录组分析的特点和技术发展历史以及常用研究策略和不同技术的优缺点,并就其面临挑战和未来发展前景进行了讨论,为该技术的进一步研究与应用提供参考. 相似文献
5.
花粉发育是植物生活周期中一个重要且复杂的过程, 需要多种基因的参与。花粉发育是否完善可以根据花粉形态特征, 并通过检测花粉的生活力、萌发力、可育性和受精能力等生理特征来判断。以拟南芥候选基因突变体为材料, 通过对花粉的这些生理特征的检测, 可以初步推测候选基因参与花粉发育的功能和作用机制。本文介绍了用于花粉活力测定的几种技术的原理和方法, 以及应用这些方法进行花粉发育研究的进展。 相似文献
6.
7.
拟南芥花粉活力的测定及其在花粉发育研究中的应用 总被引:1,自引:0,他引:1
花粉发育是植物生活周期中一个重要且复杂的过程,需要多种基因的参与。花粉发育是否完善可以根据花粉形态特征,并通过检测花粉的生活力、萌发力、可育性和受精能力等生理特征来判断。以拟南芥候选基因突变体为材料,通过对花粉的这些生理特征的检测,可以初步推测候选基因参与花粉发育的功能和作用机制。本文介绍了用于花粉活力测定的几种技术的原理和方法,以及应用这些方法进行花粉发育研究的进展。 相似文献
8.
时空异质性是造成不同组织功能差异的关键因素,在细胞命运调控过程中发挥重要作用。时空转录组(stRNA-seq)是一项将定量转录组与高分辨率组织成像相结合的新兴组学技术。它将表达数据锚定到目标器官或组织的物理图上,并以无偏见的生物信息学方式对组织切片和细胞层进行分子表征,反映特定细胞内基因的时空异质性表达丰度。受益于高通量测序技术的快速发展,时空转录组为探究各类细胞基因表达的时空异质性提供了新的实验思路和方法。该文介绍了时空转录组的原理和发展进程,以及不同时空转录组的技术特点和优劣,总结了时空转录组在动物、植物和微生物中的应用,可为今后系统开展时空转录组研究提供理论参考。 相似文献
9.
空间转录组技术旨在对细胞的基因表达进行定量测量,同时提供细胞在组织空间的具体位置信息.与传统的转录组技术相比,空间转录组技术能获得细胞在组织生理环境下真实的基因表达特征,以及与微环境的关系,进一步推进对正常和病理状态下细胞特性的理解.近年来,空间转录组技术的发展取得了重要的进展,检测的细胞通量、转录本数量和质量不断提高... 相似文献
10.
11.
It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis. 相似文献
12.
13.
Lina Rustanti Hongping Jin Dongsheng Li Mary Lor Haran Sivakumaran David Harrich 《中国病毒学》2018,33(2):142-152
14.
正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases 相似文献
15.
Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme
responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare
the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show
that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by
distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of
demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least
one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of
the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable
potent antiproliferative synthetic drugs. 相似文献
16.
17.
18.
RICHARD E. NORRIS 《Botanical journal of the Linnean Society. Linnean Society of London》1991,106(1):1-40
Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera. 相似文献
19.
JOAN VALUÈS MONTSERRAT TORRELL NÚRIA GARCIA JACAS 《Botanical journal of the Linnean Society. Linnean Society of London》2001,137(4):399-407
Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted. 相似文献
20.
The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle. 相似文献