Clay minerals of red-yellow soils derived from pleistocene sediments in Japan     

Ichiro Kanno  Yoshio Honjo  Shizuoki Arimura 《Soil Science and Plant Nutrition》2013,59(1):220-232

Red-Yellow soils are widely developed on terraces and hilly lands in the south-western half of Japan. They do not show any evidence of bleaching in the lower part of the A horizon, and are characterized by an extremely strong acid reaction, and a very low base-status⁹⁾. There are few studies on clay mineralogy of Red-Yellow soils in Japan. Egawa et al⁴⁾. have reported on clay mineralogy of soils derived from the Pleistocene and the Tertiary sediments most of which may be regarded as Red-Yellow soils. Matsui and Katô¹⁰⁾ have described clay minerals of Red-Yellow soils derived from the Pleistocene sediment in the environs of Shinjobara, Shizuoka Prefecture. These investigations indicated that clay minerals of Red-Yellow soils derived from the Pleistocene sediments consisted mainly of kaolin minerals, whereas those of Red-Yell ow soils derived from the Tertiary sediments were of the kaolin-illite association.  相似文献   

Glassy volcanic-ash soils in Japan     

Ichiro Kanno 《Soil Science and Plant Nutrition》2013,59(1):1-2

Introduction

In Tottori district, there can be seen an extensive sand-dune region, which develops on the coastal terrace of the volcanogenous diluvium running from east to west along the shore of the Japan Sea. There is about 9750 hectares in total area: 5265 hectares comprising numerous inter-dune depressions are used for tillage field, 1207 hectares afforested and 3278 hectares left barren.  相似文献   

A scheme for soil classification of paddy fields in Japan with special reference to mineral paddy soils     

Ichiro Kanno 《Soil Science and Plant Nutrition》2013,59(1):148-157

Introduction

Paddy (irrigated) rice is the most important single crop in Japan. Nearly half of the total arable lands covering approximately 6.5 million hectares, are devoted to the growing of the rice plant. It is grown mainly on the alluvial plains which are intensively cultivated, and are the most productive soils of the country. Since the idea of modern pedology was introduced into Japan, some work has been done by some Japanese investigators to classify paddy soils on the basis of their morphological characteristics. A brief historical review on the soil survey work in Japan has been given by Kamoshita⁸⁾. In 1936 Kawamura described methods of soil survey in Korea through a careful study of the work developed by Stremme and his colleagues in Danzig. In those days Kamoshita⁹⁾,¹⁰⁾ devised a scheme of paddy soil classification by applying the concept of the wet soil types (mineralische Nassböden) proposed by Stremme, and he established five predominant soil types as follows: Bog soils (Moorböden), Half-bog soils (anmoorige Böden), Meadow soils (Wiesenböden), Gray lowland soils (graue Auenböden), and Brown lowland soils (braune Auenböden). The names in parentheses represent the wet soil types proposed by Stremme. These soil types are subdivided into soil kinds (Bodenarten) on the basis of differences in texture, rusty mottling, and humus content. The soil kinds were used as both categorical and cartographical units for detailed soil surveys.  相似文献   

Effect of reducing conditions on P sorption of soils     

Masami Nanzyo  Hidenobu Kanno  Sawae Obara 《Soil Science and Plant Nutrition》2013,59(7):1023-1028

Abstract

The phosphate sorption (P _sor) capacity of soils increased when the soils were reduced (Willet and Higgins, Aust. J. Soil Res., 16, 319–326, 1978). The present study aimed at the elucidation of this mechanism using Na₂S₂O₄ and 5 different soils. The P _sor of the 5 soils increased with the addition of a small amount of Na₂S₂O₄. Fe(II) was released from the soils with the addition of the same small amount of Na₂S₂O₄. Furthermore, when the amount of FeCl₂ corresponding to the amount of Fe(II) released along with the small amount of Na₂S₂O₄ was added, the P _sor of the soil increased. However, the P _sor of the lowland soils, of which the hydrous Fe oxide content was lower than the others, decreased when the amount of Na₂S₂O₄ addition was increased up to 150–200 g kg^?1. Based on these results, the following process is inferred for the increase in the P _sor of the soils when they are reduced. Hydrous Fe oxide in soil takes the form of very fine, high-density particles and reacts with P mainly on their surface. When a small amount of Na₂S₂O₄ is added, the hydrous Fe oxide is partially reduced, dissolved and finally re-precipitates with P by oxidation with O₂ from the air during the experiment.  相似文献   

A vegetative line of asparagus (Asparagus officinalis) with a homeotic change in flower development is correlated with a functional deficiency in class-B MADS-box genes     

Y. Asada  N. Kasai  Y. Adachi  A. Kanno  N. Ito  P.-Y. Yun 《The Journal of Horticultural Science and Biotechnology》2013,88(5):874-882

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Population genetic structure and gene flow in the Japanese sea cucumber Apostichopus japonicus across Toyama Bay, Japan     

Taha Soliman  Manami Kanno  Akihiro Kijima  Yuji Yamazaki 《Fisheries Science》2012,78(4):775-783

The Japanese sea cucumber Apostichopus japonicus has a pelagic-lecithotrophic larva. Here, we clarify larval dispersal among Japanese sea cucumber populations by describing the levels of distinctiveness and gene flow among red and green variant populations of A. japonicus across Toyama Bay using 11 polymorphic microsatellite markers. Samples of Japanese sea cucumber populations were collected from three localities (Noto, Shinminato, and Uozu) around Toyama Bay. Geographically separated populations of red and green variants were determined to be genetically distinct, supported by phylogenetic analysis and the distinctiveness range values of pairwise multilocus estimates of F _ST. Contemporary migration analyses indicated that the majority of estimated migration events occurred within A. japonicus populations comprised of only either red or green variants. In a historical gene flow analysis, two best-fit models (n-island and stepping stone models) showed circulation for the gene migration in Toyama Bay among red variant populations. Our results provide useful information on the genetic structure of Japanese sea cucumber populations and will be helpful for genetic conservation and fisheries management of sea cucumber populations in Toyama Bay.  相似文献   

Female preference did not evolve under laboratory conditions in the solanaceous fruit fly Bactrocera latifrons     

Takashi Kuriwada  Norikuni Kumano  Keiko Shiromoto  Dai Haraguchi  Takashi Matsuyama  Tsuguo Kohama 《国际虫害防治杂志》2014,60(3):160-165

Sterile insect technique (SIT) is widely used to eradicate target pest species. Its effectiveness depends on the ability of released sterile males to mate with wild females. In pest species with a female choice mating system, there is potential for female preference to evolve in the wild population in view of the resulting zero-fitness in females that mate with sterile males. The evolution of female preference against sterile males can, therefore, reduce the efficiency of the SIT as the likelihood decreases that sterile males will mate with wild females. We examined this experimentally by using the solanaceous fruit fly Bactrocera latifrons, a serious pest of solanaceous crops, by allowing female preference in mass-reared fruit flies to select between fertile and sterile males over 12 generations. However, this did not generate a rapid evolutionary response. Also the remating rate of females did not increase, even when the first mating partner was a sterile male. We discuss the implication of the results for the eradication project by the SIT program.  相似文献   

Field survey of ranunculus mild mosaic virus,tomato spotted wilt virus and cucumber mosaic virus infections in <Emphasis Type="Italic">Ranunculus asiaticus</Emphasis> L. in Japan by newly developed multiplex RT-PCR     

Saki Hayahi  Yosuke Matsushita  Yoshiaki Kanno  Yoshiyuki Kushima  Satoshi Teramoto  Minoru Takeshita 《European journal of plant pathology / European Foundation for Plant Pathology》2018,150(1):205-212

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Fucoxanthinol,Metabolite of Fucoxanthin,Improves Obesity-Induced Inflammation in Adipocyte Cells     

Hayato Maeda  Shogo Kanno  Mei Kodate  Masashi Hosokawa  Kazuo Miyashita 《Marine drugs》2015,13(8):4799-4813

Fucoxanthin (Fx) is a marine carotenoid found in edible brown seaweeds. We previously reported that dietary Fx metabolite into fucoxanthinol (FxOH), attenuates the weight gain of white adipose tissue of diabetic/obese KK-A^y mice. In this study, to evaluate anti-diabetic effects of Fx, we investigated improving the effect of insulin resistance on the diabetic model of KK-A^y mice. Furthermore, preventing the effect of FxOH on low-grade chronic inflammation related to oxidative stress was evaluated on 3T3-L1 adipocyte cells and a RAW264.7 macrophage cell co-culture system. A diet containing 0.1% Fx was fed to diabetic model KK-A^y mice for three weeks, then glucose tolerance was observed. Fx diet significantly improved glucose tolerance compared with the control diet group. In in vitro studies, FxOH showed suppressed tumor necrosis factor-α (TNF-α), and monocyte chemotactic protein-1 (MCP-1) mRNA expression and protein levels in a co-culture of adipocyte and macrophage cells. These findings suggest that Fx ameliorates glucose tolerance in the diabetic model mice. Furthermore, FxOH, a metabolite of Fx, suppresses low-grade chronic inflammation in adipocyte cells.  相似文献   

Narrowed temperature adaptability in non-natal osmotic environments of two euryhaline wanderers,dace and black porgy: implications for seasonal habitat changes     

Masahiro Nakamura  Reiji Masuda  Katsumi Tsukamoto  Tsuguo Otake 《Fisheries Science》2016,82(2):261-268

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