共查询到20条相似文献,搜索用时 257 毫秒
1.
2.
农业生物技术领域的迅猛发展导致了对分子和细胞生物学的深入研究,并开发了新的基因转移方法。新出版的《粮食作物的生物技术:水稻生物技术及遗传工程》一书提供了一份详细的综述和近期水稻遗传工程的研究进展。本书的内容包括组织培养方面、细胞生物学和原生质体技术,还包括关于水稻基因转移的详细资料、转基因植物的特性鉴定和转基因植物的大田实验结果。本书分为以下各章:作为全球性作物 相似文献
3.
4.
细胞壁作为植物细胞重要的组成部分,在决定细胞形状、维持机械支撑、吸收养分等方面发挥重要功能。因此,揭示植物细胞壁合成的调控机制具有重大的生物学意义。基于植物组织水平研究细胞壁的生物合成具有难以控制时间尺度、观察空间狭小等局限性。原生质体作为去除细胞壁的单个细胞是研究细胞壁再生的理想系统。在过去的几十年里报道了大量关于植物原生质体再生细胞壁的研究,但是关于细胞壁再生的机制尚不清楚。该综述介绍了目前应用于植物原生质体再生细胞壁研究的主要技术和取得的研究进展,并且对该领域的后续发展进行了展望,为进一步阐明植物细胞壁生物合成的机制提供理论参考。 相似文献
5.
以模式植物拟南芥为例, 建立了一种克隆small RNA 分子的技术平台, 为今后开展small RNA 分子的生物学功能研究提供技术支撑。通过用抗病信号分子水杨酸(SA) 处理拟南芥叶片后, 进行small RNA 分子群体的分离与接头连接、PCR 扩增、T - 载体克隆与检测、测序分析和生物信息学分析等一系列实验, 成功地克隆了一些small RNAs, 并对其表达和功能进行了分析。 相似文献
6.
7.
8.
TUNEL是近年来发展的一种对凋亡细胞进行原位检测的方法,可以特异性地标记完整的凋亡细胞核或凋亡小体的染色体3'_OH断裂末端,但在植物细胞中的应用还不多。本文报道应用TUNEL法检测胡萝卜原生质体的凋亡,并与DNA电泳、彗星电泳等方法进行了比较,结果表明它是一种适用于植物原生质体凋亡检测的灵敏度较高的方法。 相似文献
9.
“检测生物组织中糖类、脂肪和蛋白质”是高中生物学必修1《分子和细胞》的一个重要实验。从实验原理、教学组织方式、检测方法以及学习评价等方面对这一实验的教学进行了分析,为高中生物学教学提供参考材料。 相似文献
10.
11.
12.
Jing Zhou Bochu Wang Yi Li Yichuan Wang Liqing Zhu 《Journal of Plant Growth Regulation》2007,26(1):55-68
Plant cells are highly susceptible and receptive to physical factors, both in nature and under experimental conditions. Exposure
to mechanical forces dramatically results in morphological and microstructural alterations in their growth. In the present
study, cells from chrysanthemum (Dendranthema morifolium) were subjected to constant pressure from an agarose matrix, which surrounded and immobilized the cells to form a cell-gel
block. Cells in the mechanically loaded blocks elongated and divided, with an axis preferentially perpendicular to the direction
of principal stress vectors. After a sucrose-induced plasmolysis, application of peptides containing an RGD motif, which interferes
with plasma membrane-cell wall adhesion, reduced the oriented growth under stress conditions. Moreover, colchicines, but not
cytochalasin B, abolished the effects of mechanical stress on cell morphology. Cellulose staining revealed that mechanical
force reinforces the architecture of cell walls and application of mechanical force, and RGD peptides caused aggregative staining
on the surface of plasmolyzed protoplasts. These results provide evidence that the oriented cell growth in response to compressive
stress requires the maintenance of plasmalemma-cell wall adhesion and intact microtubules. Stress-triggered wall development
in individual plant cells was also demonstrated. 相似文献
13.
植物实验生殖生物学是植物实验胚胎学发展的新阶段,其主要特征为操作技术水平的提高与多学科综合性研究的加强。花粉原生质体、生殖细胞、精子、胚囊、卵细胞的操作、雌雄配子体外融合、配子-体细胞杂交等,代表了当前的主要研究趋势。实验生殖生物学与基因工程相结合,开辟了植柏物生殖工程新技术领域的前景。对生殖工程的意义与内容提出了轮廓设想。 相似文献
14.
植物实验生殖生物学是植物实验胚胎学发展的新阶段,其主要特征为操作技术水平的提高与多学科综合性研究的加强。花粉原生质体、生殖细胞、精子,胚囊、卵细胞的操作、雌雄配子体外融合、配子-体细胞杂交等,代表了当前的主要研究趋势。实验生殖生物学与基因工程相结合,开辟了植物生殖工程新技术领域的前景。对生殖工程的意义与内容提出了轮廓设想。 相似文献
15.
A. R. Gould S. E. Ashmore 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1982,64(1):7-12
Summary The polycation mediated attachment of purified tritiated DNA to plant protoplasts has been measured by quantitative microautoradiography. The automated grain counting technique used, also provides information on the cell cycle stage of individual protoplasts, which circumvents the need to synchronize the plant cell population before preparation of protoplasts. With protoplasts from asynchronously dividing suspension cultures of Nicotiana syhestris (NS-1), S-phase protoplasts appear to be inefficient binders of 3H-DNA, as compared with G1 or G2 protoplasts. Protoplasts derived from a tumour line of Crepis capillaris (CAPT) exhibit 3H-DNA binding at all cell cycle phases, but Sphase protoplasts appear to be preferential binders. These differences are discussed with reference to cell cycle kinetics, membrane charge variation and the possibility of increasing the efficiency of genetic transformation of higher plant cells in culture. 相似文献
16.
Experimental plant reproductive biology has recently emerged as a new form of experimental embryology characterized by the direct experimental isolation and manipulation of reproductive cells and protoplasts. This work is fostered by current multidisciplinary trends in the sciences and serves to deepen our knowledge about the control of reproductive processes by providing novel in vitro material. The techniques of experimental plant reproductive biology also show great potential in providing new means for biotechnology, leading to significant refinements in plant breeding in higher plants that may eventually permit direct reproductive cell engineering. Recent achievements by our research group in experimental manipulation and biological studies of pollen protoplasts, generative cells, sperm cells, and embryo sacs are reviewed, and some ideas about future developments in this new area are presented. 相似文献
17.
18.
脂多糖(lipopolysaccharides, LPS)是革兰氏阴性细菌细胞壁的主要成分,被植物感知后,启动植物防御反应。利用荧光探针分子成像及激光共聚焦扫描显微镜技术,在位、直观检测了LPS诱导下,拟南芥细胞产生重要信号分子一氧化氮( NO)的时空特征。LPS诱导细胞产生大量NO,这些NO主要定位在细胞膜周围,且是在LPS处理90 min后出现。NO合成酶抑制剂L-单甲基精氨酸能明显抑制LPS诱导的NO生成,说明LPS诱导NO产生是NO合成酶途径依赖的。该研究结果有助于深入理解LPS作用机制以及NO信号传导通路的全貌,并为生物物理技术在相关植物生理研究中的应用提供一定的借鉴作用。 相似文献
19.
20.
Ortiz-Zapater E Soriano-Ortega E Marcote MJ Ortiz-Masiá D Aniento F 《The Plant journal : for cell and molecular biology》2006,48(5):757-770
Plant cells possess much of the molecular machinery necessary for receptor-mediated endocytosis (RME), but this process still awaits detailed characterization. In order to identify a reliable and well-characterized marker to investigate RME in plant cells, we have expressed the human transferrin receptor (hTfR) in Arabidopsis protoplasts. We have found that hTfR is mainly found in endosomal (Ara7- and FM4-64-positive) compartments, but also at the plasma membrane, where it mediates binding and internalization of its natural ligand transferrin (Tfn). Cell surface expression of hTfR increases upon treatment with tyrphostin A23, which inhibits the interaction between the YTRF endocytosis signal in the hTfR cytosolic tail and the mu2-subunit of the AP2 complex. Indeed, tyrphostin A23 inhibits Tfn internalization and redistributes most of hTfR to the plasma membrane, suggesting that the endocytosis signal of hTfR is functional in Arabidopsis protoplasts. Co-immunoprecipitation experiments show that hTfR is able to interact with a mu-adaptin subunit from Arabidopsis cytosol, a process that is blocked by tyrphostin A23. In contrast, treatment with brefeldin A, which inhibits recycling from endosomes back to the plasma membrane in plant cells, leads to the accumulation of Tfn and hTfR in larger patches inside the cell, reminiscent of BFA compartments. Therefore, hTfR has the same trafficking properties in Arabidopsis protoplasts as in animal cells, and cycles between the plasma membrane and endosomal compartments. The specific inhibition of Tfn/hTfR internalization and recycling by tyrphostin A23 and BFA, respectively, thus provide valuable molecular tools to characterize RME and the recycling pathway in plant cells. 相似文献