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Overexpression of INCREASED CAMBIAL ACTIVITY, a putative methyltransferase, increases cambial activity and plant growth

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Journal of Integrative Plant Biology 2016年第11期58卷 874-889页

作者： hyunsook kim Mikiko Kojima Daeseok Choi Soyoung Park Minami Matsui Hitoshi Sakakibara Ildoo Hwang Department of Life Sciences Pohang University of Science and Technology Pohang 790-784 Korea Synthetic Genomics Research Team Biomass Research Cooperation Division (BMEP) RIKEN Center for Sustainable Resource Science (CSRS) Tsurumi Yokohama 230-0045 Japan Riken Center for Sustainable Resource Science (CSRS) Tsurumi Yokohama 230-0045 Japan

Cambial activity is a prerequisite for secondary growth in plants; however, regulatory factors controlling the activity of the secondary meristem in radial growth remain elusive. Here, we identified INCREASED CAMBIAL ACTIVITY （ICA）, a gene encoding a putative pectin methyltransferase, which could function as a modulator for the meristematic activity of fascicular and interfascicular cambium in Arabidopsis. An overexpressing transgenic line, 35S：＇1CA, showed accelerated stern elongation and radial thickening, resulting in increased accumulation of biomass, and increased levels of cytokinins （CKs） and gibberellins （GAs）. Expression of genes encoding pectin methylesterases involved in pectin modification together with pectin methyltransferases was highly induced in 355：：ICA, which might contribute to an increase of methanol emission as a byproduct in 35S：ICA. Methanol treatment induced the expression of GA- or CK-responsive genes and stimulated plant growth. Overall, we propose that ectopic expression of ICA increases cambial activity by regulating CK and GA homeostasis, and methanol emission, eventually leading to stem elongation and radial growth in the inflorescence stem.

关键词： Cambial activity cytokinin gibberellin methanol methyltransferase pectin shoot growth

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Multiple effects of grape seed polyphenolics to prevent metabolic diseases

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Frontiers of Agricultural Science and Engineering 2018年第3期5卷 351-361页

作者： Torey ARVIK hyunsook kim James SEIBER Wallace YOKOYAMA Sonomaceuticals/WholeVine Product LLC Santa RosaCA 95403USA Hanyang University Seoul 04763Korea Department of Food Science University of CaliforniaDavisCA 95616USA United States Department of Agriculture(USDA) Agricultural Research Service(ARS)Western Regional Research CenterAlbanyCA 94710USA

Obesity is increasing in developing *** studies show a relationship between affluence and obesity. Changing food intake patterns with affluence such as preference for foods with less astringent polyphenolic compounds and dietary fibers may increase risk of metabolic dysfunctions due to caloric *** models of obesity consistently show that grape seed procyanidins prevent increases in body and abdominal adipose weight gain, plasma cholesterol, liver weight gain and inflammation in animals on high fat diets. The mechanisms are not clear because the oral intake of procyanidins results in pleiotropic interactions with proteins in the mouth, stomach, small intestine, cecum and colon that affect the rate of digestion of bioavailability of macronutrients, sterols, and dietary fiber. Procyanidins also bind bile acids and reduce intestinal permeability to inflammatory bacterial cell wall fragment. Procyanidins are not degraded or metabolized until reaching the lower gut where they can be metabolized into phenolic acids by gut bacteria. While they are metabolized by gut bacteria,they also alter total numbers and distribution of phyla and species of gut bacteria. Gut bacteria are recognized as significant contributors to obesity and obesity related metabolic diseases. The review examines the different pleiotropic effects of grape seed procyanidins that have a significant effect on metabolic disease in animal models of obesity.

关键词： grape seed obesity procyanidins high fat microbiota animal models

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Characteristics of WDM Couplers Based on 80 μm Cladding Fiber

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光学学报 2003年第S1期23卷 277-278页

作者： hyunsook Shin Woojin Shin Manjung Han Kyoungrok kim Seungryong Han Yunsong Jeong K. Oh Department of Information and Communications K-JIST Kwangju 500712 Rep. of KoreaDepartment of Information and Communications K-JIST Kwangju 500712 Rep. of KoreaDepartment of Information and Communications K-JIST Kwangju 500712 Rep. of KoreaDepartment of Information and Communications K-JIST Kwangju 500712 Rep. of KoreaDepartment of Information and Communications K-JIST Kwangju 500712 Rep. of KoreaDepartment of Information and Communications K-JIST Kwangju 500712 Rep. of KoreaDepartment of Information and Communications K-JIST Kwangju 500712 Rep. of Korea

We have fabricated 1310/1550 and 1480/1550nm WDM couplers using a fiber of 80μm cladding diameter, whose tapering length is shortened by 4~8mm for the identical coupling strength compared to those of 125μm cladding ... 详细信息

关键词： WDM m Cladding Fiber be in of Characteristics of WDM Couplers Based on 80 on

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