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排序方式: 共有409条查询结果,搜索用时 31 毫秒
311.
Lia Ooi Takakazu Matsuura Shintaro Munemasa Yoshiyuki Murata Maki Katsuhara Takashi Hirayama Izumi C. Mori 《Plant, cell & environment》2019,42(2):437-447
Plants closing stomata in the presence of harmful gases is believed to be a stress avoidance mechanism. SO2, one of the major airborne pollutants, has long been reported to induce stomatal closure, yet the mechanism remains unknown. Little is known about the stomatal response to airborne pollutants besides O3. SLOW ANION CHANNEL‐ASSOCIATED 1 (SLAC1) and OPEN STOMATA 1 (OST1) were identified as genes mediating O3‐induced closure. SLAC1 and OST1 are also known to mediate stomatal closure in response to CO2, together with RESPIRATORY BURST OXIDASE HOMOLOGs (RBOHs). The overlaying roles of these genes in response to O3 and CO2 suggested that plants share their molecular regulators for airborne stimuli. Here, we investigated and compared stomatal closure event induced by a wide concentration range of SO2 in Arabidopsis through molecular genetic approaches. O3‐ and CO2‐insensitive stomata mutants did not show significant differences from the wild type in stomatal sensitivity, guard cell viability, and chlorophyll content revealing that SO2‐induced closure is not regulated by the same molecular mechanisms as for O3 and CO2. Nonapoptotic cell death is shown as the reason for SO2‐induced closure, which proposed the closure as a physicochemical process resulted from SO2 distress, instead of a biological protection mechanism. 相似文献
312.
Koji Miyamoto Tomoharu Matsumoto Emi Yumoto Tomoko Sakazawa Takao Yokota Hisakazu Yamane 《Bioscience, biotechnology, and biochemistry》2019,83(5):876-881
A facile and efficient method has been developed for the optical resolution of racemic jasmonic acid (JA) on a relatively large scale and was successfully utilized for the preparation of optically pure (+)-JA and (?)-JA. We indicated that (+)-JA has lower growth inhibitory activity than (?)-JA in the rice seedling growth test and confirmed in line with an earlier observation that their respective biologically-active forms, (+)-JA-Ile and (?)-JA-Ile, show comparable inhibitory activities. We compared the metabolism of (+)-JA and (?)-JA into (+)-JA-Ile and (?)-JA-Ile, respectively, in the JA-deficient rice cpm2, and found that the exogenously applied (+)-JA was metabolized to the corresponding Ile conjugate less efficiently as compared with (?)-JA. Such metabolic rate difference may cause a discrepancy between biological potencies of (+)-JA and (?)-JA in rice.
Abbreviations: FW: fresh weight; Ile: isoleucine; JA: jasmonic acid; JA-Ile: jasmonoyl-l-isoleucine; LC-ESI-MS/MS: liquid chromatography and electrospray ionization tandem mass spectrometry; MeJA: methyl jasmonate; OPDA: 12-oxophytodienoic acid 相似文献
313.
314.
Evaluation of the effectiveness of the potent bis‐quaternary ammonium compound, 4,4′‐(α,ω‐hexametylenedithio) bis (1‐octylpyridinium bromide) (4DTBP‐6,8) on Pseudomonas aeruginosa
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315.
Position dependence of amino acid intrinsic helical propensities II: non-charged polar residues: Ser, Thr, Asn, and Gln.
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M. Petukhov K. Uegaki N. Yumoto S. Yoshikawa L. Serrano 《Protein science : a publication of the Protein Society》1999,8(10):2144-2150
The assumption that the intrinsic alpha-helical propensities of the amino acids are position independent was critical in several helix/coil transition theories. In the first paper of these series, we reported that this is not the case for Gly and nonpolar aliphatic amino acids (Val, Leu, Met, and Ile). Here we have analyzed the helical intrinsic propensities of noncharged polar residues (Ser, Thr, Asn, and Gln) at different positions of a model polyalanine-based peptide. We found that Thr is more favorable (by approximately 0.3 kcal/mol) at positions N1 and N2 than in the helix center, although for Ser, Asn, and Gln the differences are smaller (+/-0.2 kcal/mol), and in many cases within the experimental error. There is a reasonable agreement (+/-0.2 kcal/mol) between the calculated free energies, using the ECEPP/2 force field equipped with a hydration potential, and the experimental data, except at position N1. 相似文献
316.
Takakazu Oka Sota Hayashida Yuko Kaneda Masaki Takenaga Yoko Tamagawa Sadatoshi Tsuji Akikazu Hatanaka 《BioPsychoSocial medicine》2008,2(1):1-7
Background
Green odor, a mixture of equal amounts of 2E-hexenal (leaf aldehyde) and 3Z-hexenol (leaf alcohol) has been demonstrated to have an anti-stress effect in rats. This study investigated whether or not green odor also has an anti-stress effect in humans. 相似文献317.
Complete genome structure of Gloeobacter violaceus PCC 7421, a cyanobacterium that lacks thylakoids. 总被引:5,自引:0,他引:5
Yasukazu Nakamura Takakazu Kaneko Shusei Sato Mamoru Mimuro Hideaki Miyashita Tohru Tsuchiya Shigemi Sasamoto Akiko Watanabe Kumiko Kawashima Yoshie Kishida Chiaki Kiyokawa Mitsuyo Kohara Midori Matsumoto Ai Matsuno Naomi Nakazaki Sayaka Shimpo Chie Takeuchi Manabu Yamada Satoshi Tabata 《DNA research》2003,10(4):137-145
318.
319.
Identification of annexin 1 as a novel autoantigen in acute exacerbation of idiopathic pulmonary fibrosis 总被引:1,自引:0,他引:1
Kurosu K Takiguchi Y Okada O Yumoto N Sakao S Tada Y Kasahara Y Tanabe N Tatsumi K Weiden M Rom WN Kuriyama T 《Journal of immunology (Baltimore, Md. : 1950)》2008,181(1):756-767
Consistent with the hypothesis that pulmonary epithelial apoptosis is the key to the acute exacerbation of idiopathic pulmonary fibrosis (IPF), we conducted serological identification of Ags by recombinant expression cloning (SEREX) analysis using type II alveolar cell carcinoma (A549) cell lines to identify disease-related Abs. In a survey of Abs to the recombinant autoantigens identified by SEREX analysis, five Abs were identified as novel candidates for the acute exacerbation of IPF. Abs to annexin 1 were detected in 47 and 53% of the sera and bronchoalveolar lavage materials from patients with acute exacerbation of IPF. Some identical TCR Vbeta genes were identified in sequential materials obtained at 1-3 mo in all 10 acute exacerbation IPF cases, suggesting that some infiltrating CD4-positive T cells sharing limited epitopes expand by Ag-driven stimulation during disease extension. The CDR3 region of these identical TCR Vbeta genes showed high homology with the N-terminal portion of annexin 1, including in the HLA-DR ligand epitopes predicted by TEPITOPE analysis. By Western blotting analysis and observation of the CD4-positive T cell responses in bronchoalveolar lavage samples, the N-terminal portion of annexin 1 was cleaved and found to induce marked proliferative responses of CD4-positive T cells in three patients. Our study demonstrates that annexin 1 is an autoantigen that raises both Ab production and T cell response in patients with acute exacerbation of IPF, and that the N-terminal portion of annexin 1 plays some role in the pathogenesis of acute exacerbation in IPF patients. 相似文献
320.
Daiju Kawase Saneyoshi Ueno Yoshihiko Tsumura Nobuhiro Tomaru Akihiro Seo Takakazu Yumoto 《Conservation Genetics》2009,10(6):1997-1999
We developed simple sequence repeat (SSR) markers from expressed sequence tags (ESTs) of Sciadopitys verticillata (Sciadopityaceae) which is an endemic Japanese evergreen conifer species. Eleven loci were chosen which showed clear polymorphic patterns from three populations, with 2–9 alleles per locus. Two loci showed significant deviation from Hardy–Weinberg equilibrium in at least one population. No significant genotypic disequilibrium was detected for any pair of loci after the significance levels were adjusted by Bonferonni-type procedures. 相似文献