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61.
Establishment of a new conditionally immortalized human skeletal muscle microvascular endothelial cell line 下载免费PDF全文
62.
Evaluation of the toxicity of stress-related aldehydes to photosynthesis in chloroplasts 总被引:1,自引:0,他引:1
Aldehydes produced under various environmental stresses can cause cellular injury in plants, but their toxicology in photosynthesis
has been scarcely investigated. We here evaluated their effects on photosynthetic reactions in chloroplasts isolated from
Spinacia oleracea L. leaves. Aldehydes that are known to stem from lipid peroxides inactivated the CO2 photoreduction to various extents, while their corresponding alcohols and carboxylic acids did not affect photosynthesis.
α,β-Unsaturated aldehydes (2-alkenals) showed greater inactivation than the saturated aliphatic aldehydes. The oxygenated short
aldehydes malondialdehyde, methylglyoxal, glycolaldehyde and glyceraldehyde showed only weak toxicity to photosynthesis. Among
tested 2-alkenals, 2-propenal (acrolein) was the most toxic, and then followed 4-hydroxy-(E)-2-nonenal and (E)-2-hexenal. While the CO2-photoreduction was inactivated, envelope intactness and photosynthetic electron transport activity (H2O → ferredoxin) were only slightly affected. In the acrolein-treated chloroplasts, the Calvin cycle enzymes phosphoribulokinase,
glyceraldehyde-3-phosphate dehydrogenase, fructose-1,6-bisphophatase, sedoheptulose-1,7-bisphosphatase, aldolase, and Rubisco
were irreversibly inactivated. Acrolein treatment caused a rapid drop of the glutathione pool, prior to the inactivation of
photosynthesis. GSH exogenously added to chloroplasts suppressed the acrolein-induced inactivation of photosynthesis, but
ascorbic acid did not show such a protective effect. Thus, lipid peroxide-derived 2-alkenals can inhibit photosynthesis by
depleting GSH in chloroplasts and then inactivating multiple enzymes in the Calvin cycle. 相似文献
63.
Hiroshi Abe Takeshi Shimoda Jun Ohnishi Soichi Kugimiya Mari Narusaka Shigemi Seo Yoshihiro Narusaka Shinya Tsuda Masatomo Kobayashi 《BMC plant biology》2009,9(1):97
Background
The western flower thrips (Frankliniella occidentalis [Pergande]) is one of the most important insect herbivores of cultivated plants. However, no pesticide provides complete control of this species, and insecticide resistance has emerged around the world. We previously reported the important role of jasmonate (JA) in the plant's immediate response to thrips feeding by using an Arabidopsis leaf disc system. In this study, as the first step toward practical use of JA in thrips control, we analyzed the effect of JA-regulated Arabidopsis defense at the whole plant level on thrips behavior and life cycle at the population level over an extended period. We also studied the effectiveness of JA-regulated plant defense on thrips damage in Chinese cabbage (Brassica rapa subsp. pekinensis). 相似文献64.
65.
Shuichi Jo Atsushi Kawaguchi Naoki Takizawa Yuko Morikawa Fumitaka Momose Kyosuke Nagata 《Microbes and infection / Institut Pasteur》2010,12(12-13):1079-1084
The genome of influenza type A virus consists of single-stranded RNAs of negative polarity. Progeny viral RNA (vRNA) replicated in the nucleus is nuclear-exported, and finally transported to the budding site beneath the plasma membrane. However, the precise process of the membrane targeting of vRNA is unclear, although viral proteins and cytoskeleton are thought to play roles. Here, we have visualized the translocation process of progeny vRNA using fluorescence in situ hybridization method. Our results provide an evidence of the involvement of vesicular trafficking in membrane targeting of progeny vRNA independent of that of viral membrane proteins. 相似文献
66.
Makiko Suto Hidekazu Tanaka Yasuhide Mochizuki Jun Mukai Hiroki Takada Fumitaka Soga Kumiko Dokuni Yutaka Hatani Keiko Hatazawa Hiroki Matsuzoe Hiroyuki Sano Hiroyuki Shimoura Junichi Ooka Kensuke Matsumoto Yushi Hirota Wataru Ogawa Ken-ichi Hirata 《Cardiovascular diabetology》2017,16(1):145
Background
Coexistence of left ventricular (LV) longitudinal myocardial systolic dysfunction with LV diastolic dysfunction could lead to heart failure with preserved ejection fraction (HFpEF). Diabetes mellitus (DM) is known as a significant factor associated with HFpEF. Although the mechanisms of DM-related LV myocardial injury are complex, it has been postulated that overweight contributes to the development of LV myocardial injury in type 2 diabetes mellitus (T2DM) patients. However, the precise impact of overweight on LV longitudinal myocardial systolic function in T2DM patients remains unclear.Methods
We studied 145 asymptomatic T2DM patients with preserved LV ejection fraction (LVEF) without coronary artery disease. LV longitudinal myocardial systolic function was assessed by global longitudinal strain (GLS), which was defined as the average peak strain of 18-segments obtained from standard apical views. Overweight was defined as body mass index (BMI) ≥ 25 kg/m2. Ninety age-, gender- and LVEF-matched healthy volunteers served as controls.Results
GLS of overweight T2DM patients was significantly lower than that of non-overweight patients (17.9 ± 2.4% vs. 18.9 ± 2.6%, p < 0.05), whereas GLS of both overweight and non-overweight controls was similar (19.8 ± 1.3% vs. 20.4 ± 2.1%, p = 0.38). Furthermore, multiple regression analysis revealed that for T2DM patients, BMI was the independent determinant parameters for GLS as well as LV mass index.Conclusions
Overweight has a greater effect on LV longitudinal myocardial systolic function in T2DM patients than on that in non-DM healthy subjects. Our finding further suggests that the strict control of overweight in T2DM patients may be associated with prevention of the development of HFpEF.67.
Kazuhiro Sato Fumitaka Abe Martin Mascher Georg Haberer Heidrun Gundlach Manuel Spannagl Kenta Shirasawa Sachiko Isobe 《DNA research》2021,28(3)
We have established a high-quality, chromosome-level genome assembly for the hexaploid common wheat cultivar ‘Fielder’, an American, soft, white, pastry-type wheat released in 1974 and known for its amenability to Agrobacterium tumefaciens-mediated transformation and genome editing. Accurate, long-read sequences were obtained using PacBio circular consensus sequencing with the HiFi approach. Sequence reads from 16 SMRT cells assembled using the hifiasm assembler produced assemblies with N50 greater than 20 Mb. We used the Omni-C chromosome conformation capture technique to order contigs into chromosome-level assemblies, resulting in 21 pseudomolecules with a cumulative size of 14.7 and 0.3 Gb of unanchored contigs. Mapping of published short reads from a transgenic wheat plant with an edited seed-dormancy gene, TaQsd1, identified four positions of transgene insertion into wheat chromosomes. Detection of guide RNA sequences in pseudomolecules provided candidates for off-target mutation induction. These results demonstrate the efficiency of chromosome-scale assembly using PacBio HiFi reads and their application in wheat genome-editing studies. 相似文献
68.
69.
70.
Crystalline features of cellulose microfibrils in the cell walls of Glaucocystis (Glaucophyta) were studied by combined spectroscopy and diffraction techniques, and the results were compared with those of Oocystis (Chlorophyta). Although these algae are grouped into two different classes, by the composition of their chloroplasts for instance, their cell walls are quite similar in size and morphology. The most striking features of their cellulose crystallites are that they have the highest cellulose Iα contents reported to date. In particular, the Iα fraction of cellulose from Glaucocystis was found to be as high as 90% from 13C NMR analysis. The mode of preferential orientation of cellulose crystallites in their cell walls is also interesting; equatorial 0.53-nm lattice planes were oriented parallel to the cell surface in the case of Glaucocystis, while the 0.62-nm planes were parallel to the Oocystis cell surface. Such a structural variation provides another link to the evolution of cellulose structure, biosynthesis, and its biocrystallization mechanism. 相似文献