Correction: QTL mapping under salt stress in rice using a Kalarata–Azucena population     

de Ocampo  Marjorie P.  Ho  Viet The  Thomson  Michael J.  Mitsuya  Shiro  Yamauchi  Akira  Ismail  Abdelbagi M. 《Euphytica》2022,218(9):1-14

Euphytica - The color of flour and its end-use products is an important quality trait of wheat. Understanding the genetic basis of this trait is essential for improving wheat quality. In this...  相似文献   

Effect of mitotane on pituitary corticotrophs in clinically normal dogs     

Taoda T  Hara Y  Takekoshi S  Itoh J  Teramoto A  Osamura RY  Tagawa M 《American journal of veterinary research》2006,67(8):1385-1394

OBJECTIVE: To evaluate the effects of mitotane administration on the function and morphology of pituitary corticotrophs in clinically normal dogs. ANIMALS: 12 clinically normal adult Beagles. PROCEDURES: Dogs were randomly assigned to the control group or the mitotane treatment group. In mitotane treatment group dogs, mitotane was administered for 1 month. In both groups, ACTH stimulation testing and corticotrophin-releasing hormone (CRH) stimulation testing were performed. Magnetic resonance imaging (MRI) of the pituitary gland and brain was performed in mitotane treatment group dogs before and after administration of mitotane. After CRH stimulation testing and MRI, dogs were euthanatized and the pituitary gland and adrenal glands were excised for gross and histologic examination. RESULTS: ACTH concentrations in mitotane treatment group dogs were significantly higher than in the control group dogs following CRH stimulation. Magnetic resonance imaging revealed that pituitary glands were significantly larger in treatment group dogs after administration of mitotane, compared with before administration. On gross and histologic examinations, the adrenal cortex was markedly atrophied. Immunohistochemistry revealed hypertrophy of corticotrophs in pituitary glands of mitotane treatment group dogs. CONCLUSIONS AND CLINICAL RELEVANCE: These findings indicate that inhibition of the adrenal cortex by continuous administration of mitotane leads to functional amplification and morphologic enhancement of corticotrophs in clinically normal dogs. In instances of corticotroph adenoma, hypertrophy of individual corticotrophs induced by mitotane may greatly facilitate enlargement of the pituitary gland and increases in ACTH secretion.  相似文献   

Mineralogy and petrology of comet 81P/Wild 2 nucleus samples     

Zolensky ME  Zega TJ  Yano H  Wirick S  Westphal AJ  Weisberg MK  Weber I  Warren JL  Velbel MA  Tsuchiyama A  Tsou P  Toppani A  Tomioka N  Tomeoka K  Teslich N  Taheri M  Susini J  Stroud R  Stephan T  Stadermann FJ  Snead CJ  Simon SB  Simionovici A  See TH  Robert F  Rietmeijer FJ  Rao W  Perronnet MC  Papanastassiou DA  Okudaira K  Ohsumi K  Ohnishi I  Nakamura-Messenger K  Nakamura T  Mostefaoui S  Mikouchi T  Meibom A  Matrajt G  Marcus MA  Leroux H  Lemelle L  Le L  Lanzirotti A  Langenhorst F  Krot AN  Keller LP  Kearsley AT 《Science (New York, N.Y.)》2006,314(5806):1735-1739

The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of nanometer-scale grains, with occasional much larger (over 1 micrometer) ferromagnesian silicates, Fe-Ni sulfides, Fe-Ni metal, and accessory phases. The very wide range of olivine and low-Ca pyroxene compositions in comet Wild 2 requires a wide range of formation conditions, probably reflecting very different formation locations in the protoplanetary disk. The restricted compositional ranges of Fe-Ni sulfides, the wide range for silicates, and the absence of hydrous phases indicate that comet Wild 2 experienced little or no aqueous alteration. Less abundant Wild 2 materials include a refractory particle, whose presence appears to require radial transport in the early protoplanetary disk.  相似文献   

Pole and global shape of 25143 Itokawa     

Demura H  Kobayashi S  Nemoto E  Matsumoto N  Furuya M  Yukishita A  Muranaka N  Morita H  Shirakawa K  Maruya M  Ohyama H  Uo M  Kubota T  Hashimoto T  Kawaguchi J  Fujiwara A  Saito J  Sasaki S  Miyamoto H  Hirata N 《Science (New York, N.Y.)》2006,312(5778):1347-1349

The locations of the pole and rotation axis of asteroid 25143 Itokawa were derived from Asteroid Multiband Imaging Camera data on the Hayabusa spacecraft. The retrograde pole orientation had a right ascension of 90.53 degrees and a declination of -66.30 degrees (52000 equinox) or equivalently 128.5 degrees and -89.66 degrees in ecliptic coordinates with a 3.9 degrees margin of error. The surface area is 0.393 square kilometers, the volume is 0.018378 cubic kilometers with a 5% margin of error, and the three axis lengths are 535 meters by 294 meters by 209 meters. The global Itokawa revealed a boomerang-shaped appearance composed of two distinct parts with partly faceted regions and a constricted ring structure.  相似文献   

The importance of demographic niches to tree diversity   总被引：1，自引：0，他引：1  

Condit R  Ashton P  Bunyavejchewin S  Dattaraja HS  Davies S  Esufali S  Ewango C  Foster R  Gunatilleke IA  Gunatilleke CV  Hall P  Harms KE  Hart T  Hernandez C  Hubbell S  Itoh A  Kiratiprayoon S  Lafrankie J  de Lao SL  Makana JR  Noor MN  Kassim AR  Russo S  Sukumar R  Samper C  Suresh HS  Tan S  Thomas S  Valencia R  Vallejo M  Villa G  Zillio T 《Science (New York, N.Y.)》2006,313(5783):98-101

Most ecological hypotheses about species coexistence hinge on species differences, but quantifying trait differences across species in diverse communities is often unfeasible. We examined the variation of demographic traits using a global tropical forest data set covering 4500 species in 10 large-scale tree inventories. With a hierarchical Bayesian approach, we quantified the distribution of mortality and growth rates of all tree species at each site. This allowed us to test the prediction that demographic differences facilitate species richness, as suggested by the theory that a tradeoff between high growth and high survival allows species to coexist. Contrary to the prediction, the most diverse forests had the least demographic variation. Although demographic differences may foster coexistence, they do not explain any of the 16-fold variation in tree species richness observed across the tropics.  相似文献   

Lineage specific detection of the scaly form of the pen shell <Emphasis Type="Italic">Atrina</Emphasis> spp. by a loop-mediated isothermal amplification method     

Kazumasa Hashimoto  Katsumasa Yamada  Akira Nagae  Yukihiko Matsuyama 《Fisheries Science》2018,84(5):837-848

Taxonomy of the pen shell (genus Atrina) in East Asia has been confused because of the plasticity of the shell morphology and lack of unified morphological characteristics. We analyzed the mitochondrial cytochrome c oxidase subunit I (COI) sequence of the pen shell sampled from Ariake Bay and Seto Inland Sea, western Japan. All individuals were identified as the scaly form based on external morphology; however, their COI sequences were comprised of two distinct lineages. The sequence divergence between the two was 8.3%, indicating the high possibility that they are different species. The scaly form of the pen shell in Japan is one of the target species for resource enhancement, therefore COI lineage identification of broodstock individuals is critically important to avoid producing hybrid seed. We developed a loop-mediated isothermal amplification method that enables specific detection of the two lineages. This method can contribute to reducing the cost and time required for genotyping broodstock individuals prior to seed production.  相似文献   

Rapid immunocytochemistry for the detection of cytokeratin and vimentin: assessment of its diagnostic value in neoplastic diseases of dogs          下载免费PDF全文

Mariko Sawa  Mayuko Inoue  Akira Yabuki  Moeko Kohyama  Noriaki Miyoshi  Asuka Setoguchi  Osamu Yamato 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2017,46(1):172-178

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Molecular epidemiology of <Emphasis Type="Italic">Pseudomonas syringae</Emphasis> pv. <Emphasis Type="Italic">syringae</Emphasis> strains isolated from barley and wheat infected with bacterial black node     

Akira Kawaguchi  Koji Tanina  Toshiaki Takehara 《Journal of General Plant Pathology》2017,83(3):162-168

A repetitive sequence-based (rep)-polymerase chain reaction (PCR) and inter-simple sequence repeat (ISSR)-PCR were used to molecular type Pseudomonas syringae pv. syringae (PSS) strains isolated from barley and wheat plants with bacterial black node symptoms grown in 22 different locations and six different seed-production districts in Japan. Eighteen genomic fingerprinting (GF) genotypes were obtained from the combined results of BOX-, REP-, and GTG₅-PCR, indicating that the PSS population in Japan has high genetic diversity. The result based on logistic regression indicated that the population of GF genotype A was significantly related to a seed-producing district and that the epidemic of PSS strains in fields originated mainly from seed infection. This study will be applicable to future studies of the molecular epidemiology of bacterial plant diseases that have multiple infection routes.  相似文献   

Promotive effect of soil solution on germination of Monochoria vaginalis under paddy conditions     

Takuhito Nozoe  Junko Tazawa  Akira Uchino  Shigenori Miura 《Soil Science and Plant Nutrition》2018,64(3):396-405

ABSTRACT

Growth of the weed Monochoria vaginalis (Burm. f.) Kunth under the conditions of organic rice production is a serious problem. The reason for the growth of M. vaginalis being dominant, especially in organic rice production, is not fully understood. In this study, laboratory experiments were conducted to analyze soil and seed factors in relation to the promotion of germination. (1) After incubation of flooded soil with or without the addition of rice bran (0.3%, 0.6%, and 0.9% in an air-dried soil basis), soil solutions were recovered and seeds of M. vaginalis were incubated in the soil solutions. Germination in the soils solutions without and with 0.3% rice bran was greater than that in distilled water. However, germination was suppressed in the presence of 0.6% and 0.9% of rice bran. These findings indicate that the solution from the soils with rice bran has different effects that may either increase or decrease germination. (2) A mixture of air-dried soil and distilled water was filtered to obtain a soil solution. Seeds were incubated in the soil solution (same as above). Environmental and physiological factors affected germination: exposure of seeds to light was an environmental factor and high germination activity and shallow dormancy of seed were physiological. The recovered soil solution promoted germination when these factors were not optimized. (3) There was a negative and significant correlation between dissolved oxygen (DO) in the soil solution and germination, indicating that a low content of DO was a promotive factor for germination. (4) Based on an experiment using pH buffers, germination increased with decrease in pH of soil solution, as long as the pH ranged from 4.0 to 7.0. This finding indicates that pH is also a factor that promotes germination.  相似文献