• Journal of Microbiology and Biotechnology
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• v.21 no.9
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• pp.893-902
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• 2011

Endophytic fungi are little known for their role in gibberellins (GAs) synthesis and abiotic stress resistance in crop plants. We isolated 10 endophytes from the roots of field-grown soybean and screened their culture filtrates (CF) on the GAs biosynthesis mutant rice line - Waito-C. CF bioassay showed that endophyte GMH-1B significantly promoted the growth of Waito-C compared with controls. GMH-1B was identified as Penicillium minioluteum LHL09 on the basis of ITS regions rDNA sequence homology and phylogenetic analyses. GC/MS-SIM analysis of CF of P. minioluteum revealed the presence of bioactive $GA_4$ and $GA_7$. In endophyte-soybean plant interaction, P. minioluteum association significantly promoted growth characteristics (shoot length, shoot fresh and dry biomasses, chlorophyll content, and leaf area) and nitrogen assimilation, with and without sodium chloride (NaCl)-induced salinity (70 and 140 mM) stress, as compared with control. Field-emission scanning electron microcopy showed active colonization of endophyte with host plants before and after stress treatments. In response to salinity stress, low endogenous abscisic acid and high salicylic acid accumulation in endophyte-associated plants elucidated the stress mitigation by P. minioluteum. The endophytic fungal symbiosis of P. minioluteum also increased the daidzein and genistein contents in the soybean as compared with control plants, under salt stress. Thus, P. minioluteum ameliorated the adverse effects of abiotic salinity stress and rescued soybean plant growth by influencing biosynthesis of the plant's hormones and flavonoids.

• The Journal of Korean Society for School & Community Health Education
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• v.22 no.4
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• pp.39-48
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• 2021

Objectives: The purpose is to prepare measures to effectively improve college life adaptation by identifying relevance between interpersonal relation disposition and college life adaptation, college life stress and college life adaptation for dental hygiene students. Methods: 375 dental hygiene students attending some local universities in Gyeonggi-do were sampled for convenience. The results of this study are as follows. Results: First, As a result of interpersonal relation disposition according to general characteristics, superiority-dominance tendencies were higher in first and third graders, in groups with grades above 4.0 and groups with lower subjective economic levels. And the stress of college life was high for second graders and students with lower grades than 2.0. Second, According to the correlation between factors, governance-dominance, independence-responsibility, sympathy-acceptance, sociable-friendliness, and ostentation-intoxication of interpersonal tendency factors had proportional relationship with college life adaptation, rebellion-distrust and college life stress had inverse relationship. Third, The results of multiple regression analyses to identify factors that affect college students' adaptation to college life were in the order of stress in college life, first grade, sociable-friendliness, second grade, rebellion-distrust. Conclusion: In order to improve college life adaptation, counseling and practical mediation programs should be developed and applied to effectively manage and control the negativity and positivity implied by interpersonal relationships and college life stress.

• Research in Community and Public Health Nursing
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• v.26 no.2
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• pp.108-118
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• 2015

Purpose: The purpose of this study was to investigate life stress, social support, and antepartum depression among Southeast Asian immigrant women married to Korean men. Methods: Ninety-three subjects were recruited from local women's clinics and multicultural family support centers in D City. The instruments used were the life stress scale, social support scale, and K-EPDS. All the instruments were translated into their corresponding mother languages (Vietnamese, Cambodian, and Philippine) and notarized. Results: The item mean scores of life stress and social support were 2.65 and 3.17, respectively, on a 5-point Likert scale. The mean score of antepartum depression was 10.16, indicating that they were generally in a depressive state. A positive correlation was observed between life stress and antepartum depression (r=.59, p<.001). Social support was negatively correlated with life stress (r=-.42, p<.001) and antepartum depression (r=-.39, p<.001). The best predictors for antepartum depression were life stress, marital satisfaction, and emotional support, and they explained 43% of the variance. Conclusion: Antepartum depression in Southeast Asian immigrant brides was significantly associated with life stress as well as lack of emotional support. Emotional support may reduce their life stress and antepartum depression.

• Journal of the Korean Society of School Health
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• v.25 no.1
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• pp.85-94
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• 2012

Purpose: The purpose of this study was to investigate the stress, coping and suicidal ideation among school-aged children and provide evidence for developing a stress management program for them. Methods: Data were collected and analyzed from 308 fifth graders from 6 elementary schools located in Daegu/Gyeongbuk. Results: First, for stress by general characteristics, there were significant differences in economic status, school record, self-rated health and life satisfaction. Also, subcategory stress by gender, there was a significant difference in appearance stress. Second, passive/avoidant coping had a significant difference in gender. Social support seeking coping and passive/avoidant coping were significant differences in economic status. Active coping had a significant difference in school record. Passive/avoidant coping had a significant difference in self-rated health. Aggressive coping, active coping, social support seeking coping and passive/avoidant coping had significant differences in self-rated life satisfaction. Third, stress and coping had significant differences by suicidal ideation. Fourth, stress showed positive correlations with aggressive coping and passive/avoidant coping while revealing negative correlation with active coping. Conclusion: These results from the study suggest difference by gender and need more active and positive coping strategy for suicide prevention.

• The Journal of the Korea Contents Association
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• v.14 no.9
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• pp.275-284
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• 2014

This study verifies the influence of students' stress of their adjustment to school life and the mediate effect of social support and based on the results, to develop the programs improving the school life adaptation. For the purpose, the researcher collects some data from junior high school students in Gyeongnam area. The study results were as follows. First, it appeared that the school stress has a negative effect on the school support. that is, the study notice that juveniles with high stress gain low social support Second, it appeared that the social support has a positive effect on the school adjustment, that is, the study notice that juveniles with high social support gain high social adjustment. Third, it appeared that the school stress has a negative effect on the school adjustment. that is, the study notice that juveniles with high stress gain low social support. Fourth, the result to verify the mediate effect of social support, in the long run, that depending on the social support, juveniles' stress has the full mediate effect on their adjustment to school life. That is, the study confirms that juveniles with high stress gain low social support and juveniles with stress it appeared that the school stress has a indirectly effect on the school adjustment.

• Human Ecology Research
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• v.59 no.2
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• pp.233-243
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• 2021

This study examined the longitudinal effects of media usage by early school-age children and of maternal parenting stress on children's school adjustment. The study focused on the mediating effect of executive function difficulty. Longitudinal data to examine the hypothetical model were drawn from the eighth (2015) through tenth (2017) waves of the Panel Study of Korean Children (PSKC) collected by the Korea Institute of Child Care and Education (KICCE). A total of 581 children (293 boys and 288 girls) and their mothers were included. Confirmatory factor analysis, structural equation model, and bootstrapping analysis were applied using SPSS 25.0 and Amos 26.0. The results are as follows. First, no significant correlation was found between early school-age children's media usage and maternal parenting stress. Second, neither media usage by early school-age children nor maternal parenting stress were found to directly affect children's school adjustment. Third, media usage by early school-age children and maternal parenting stress were shown to indirectly affect children's school adjustment via executive function difficulties. In other words, higher levels of media usage by early school-age children and maternal parenting stress during the first grade lead to greater executive function difficulties after a year, which, in turn, lead to a lower level of school adjustment in the third grade. This study indicates the need to develop practical support for the psychological wellbeing of mothers while they are performing their role as a parent and for children in maintaining suitable levels of media usage during early childhood.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.4
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• pp.2713-2725
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• 2015

Because a variety of factors affects children in the development process in order to act practice of life safety behaviors aggressively, this study examined the relationships among academic stress, self-esteem and practice of life safety behaviors of school-age children. Data was collected through a self reported structured questionnaire from 510 Korean school-age children using convenient sampling methods from April 1 to 30, 2013. Stepwise multiple regression revealed the Help of safety education (${\beta}=.254$, p<.001), academic stress (${\beta}=-.222$, p<.001), grade(${\beta}=.201$, p<.001), gender(${\beta}=-.180$, p<.001) to be significant predictors of practice of life safety behaviors of school-age children. These variables accounted for 23.9% of practice of life safety behaviors. Therefore, to facilitate the practice life safety behaviors in school-age children, academic stress needs to be decreased by efficient management and intervention.

• The Korean Journal of Community Living Science
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• v.26 no.1
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• pp.177-189
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• 2015

This study investigates the effects of economic factors on happiness in terms of life satisfaction, one of the most important goals in human life, and examines the moderating role of financial management in the effect of financial stress. Data were collected total 341 individuals in Daejeon, Korea(235 college students and 105 women). The factors influencing life satisfaction were analyzed multiple regression analysis. Effects of moderating variables were tested hierarchical regression analysis. Subjective financial stress was related to both individualistic happiness and collectivistic happiness, whereas objective financial stress had a negative effect only on collectivistic happiness. Financial management (specifically control of expenditure behaviors) had positive effects on both individualistic happiness and collectivistic happiness. Financial management moderated the relationship between financial stress and happiness. The results have important implications.

• Genes and Genomics
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• v.40 no.11
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• pp.1199-1211
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• 2018

Soil acidification is one of major problems limiting crop growth and especially becoming increasingly serious in China owing to excessive use of nitrogen fertilizer. Only the STOP1 of Arabidopsis was identified clearly sensitive to proton rhizotoxicity and the molecular mechanism for proton toxicity tolerance of plants is still poorly understood. The main objective of this study was to investigate the transcriptomic change in plants under the low pH stress. The low pH as a single factor was employed to induce the response of the wheat seedling roots. Wheat cDNA microarray was used to identify differentially expressed genes (DEGs). A total of 1057 DEGs were identified, of which 761 genes were up-regulated and 296 were down-regulated. The greater percentage of up-regulated genes involved in developmental processes, immune system processes, multi-organism processes, positive regulation of biological processes and metabolic processes of the biological processes. The more proportion of down-regulation genes belong to the molecular function category including transporter activity, antioxidant activity and molecular transducer activity and to the extracellular region of the cellular components category. Moreover, most genes among 41 genes involved in ion binding, 17 WAKY transcription factor genes and 17 genes related to transport activity were up-regulated. KEGG analysis showed that the jasmonate signal transduction and flavonoid biosynthesis might play important roles in response to the low pH stress in wheat seedling roots. Based on the data, it is can be deduced that WRKY transcription factors might play a critical role in the transcriptional regulation, and the alkalifying of the rhizosphere might be the earliest response process to low pH stress in wheat seedling roots. These results provide a basis to reveal the molecular mechanism of proton toxicity tolerance in plants.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.2
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• pp.734-740
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• 2012

The purpose of this study was to identify the degree of psychosocial stress and its related factors. The self-administered questionnaires were delivered to 514 high school students of both sexes in Daejon city during the period from April 1 to May 31, 2011. As a results, the degree of psychosocial stress of study subjects was 6.4% in healthy group, 72.4% in latent stress group, 21.2% in high risk stress group. The high risk stress group was significantly high in the group of worse relation with friend, lower satisfaction with the school life, none of siblings and lower satisfaction with the home life. The odds ratio of the high risk stress group significantly increased in the worse relation with friend, lower satisfaction with the school life, none of siblings and lower satisfaction with the home life than their respective counterparts. Multiple regression analysis showed that the major variables of influence on psychosocial stress included satisfaction of school life, friendship with the school fellow, number of siblings and satisfaction of home life.