• Title/Summary/Keyword: Growth-promoting

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Effectiveness of Rhizobacteria Containing ACC Deaminase for Growth Promotion of Peas (Pisum sativum) Under Drought Conditions

  • Zahir, Z.A.;Munir, A.;Asghar, H.N.;Shaharoona, B.;Arshad, M.
    • Journal of Microbiology and Biotechnology
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    • v.18 no.5
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    • pp.958-963
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    • 2008
  • A series of experiments were conducted to assess the effectiveness of rhizobacteria containing 1-aminocyclopropane-1-carboxylate (ACC) deaminase for growth promotion of peas under drought conditions. Ten rhizobacteria isolated from the rhizosphere of different crops (peas, wheat, and maize) were screened for their growth promoting ability in peas under axenic condition. Three rhizobacterial isolates, Pseudomonas fluorescens biotype G (ACC-5), P. fluorescens (ACC-14), and P. putida biotype A (Q-7), were selected for pot trial on the basis of their source, ACC deaminase activity, root colonization, and growth promoting activity under axenic conditions. Inoculated and uninoculated (control) seeds of pea cultivar 2000 were sown in pots (4 seeds/pot) at different soil moisture levels (25, 50, 75, and 100% of field capacity). Results revealed that decreasing the soil moisture levels from 100 to 25% of field capacity significantly decreased the growth of peas. However, inoculation of peas with rhizobacteria containing ACC deaminase significantly decreased the "drought stress imposed effects" on growth of peas, although with variable efficacy at different moisture levels. At the lowest soil moisture level (25% field capacity), rhizobacterial isolate Pseudomonas fluorescens biotype G (ACC-5) was found to be more promising compared with the other isolates, as it caused maximum increases in fresh weight, dry weight, root length, shoot length, number of leaves per plant, and water use efficiency on fresh and dry weight basis (45, 150, 92, 45, 140, 46, and 147%, respectively) compared with respective uninoculated controls. It is highly likely that rhizobacteria containing ACC deaminase might have decreased the drought-stress induced ethylene in inoculated plants, which resulted in better growth of plants even at low moisture levels. Therefore, inoculation with rhizobacteria containing ACC deaminase could be helpful in eliminating the inhibitory effects of drought stress on the growth of peas.

Health Promoting Lifestyle of Korean Immigrants in the U.S.A (미국이민 한국인의 건강증진 행위에 관한 연구)

  • Park, Jeong-Sook;Oh, Yun-Jung
    • Research in Community and Public Health Nursing
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    • v.12 no.2
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    • pp.491-503
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    • 2001
  • Purpose: The purpose of this study is to identify the health promoting lifestyle of Korean immigrants and to develop the health promotion program for Korean immigrants. Method: The subject of the study were 207 adults chosen from Korean religious organizations located in Chicago area. The instrument used in this study was Health Promoting Lifestyle Profile (HPLP) by Walker. Sechrist & Pender(l995). The data were collected between August 1 and October 20. 2000 by using self-administered questionnaire. Analysis of data was done by using descriptive statistics. Pearson correlation coefficient, t-test, ANOVA. Duncan test and stepwise multiple regression with SPSS program. Result. 1) The average score of performance in the health promoting lifestyle 2.43 scores. In the subscales, the highest degree of performance was 'spiritual growth', following 'nutrition', 'interpersonal relationship', 'stress management' and 'health responsibility' and the lowest degree of performance was 'physical activity'. 2) Health promoting lifestyle was significantly correlated with such demographic variables as age (F=2.659. p=.049), family income(F=4.696. p = .027), subjective health status(F = 3.882. p=.005), the frequency of pray(F=9.442. p = .000), the frequency of reading the bible(F=8.584. p= .000) and years of residence in the US(F=4.273. p= .015). 3) Health promoting lifestyle was significantly predicted by the frequency of pray, subjective health status. current working status, taking medication, level of education and family income. These variables explained 27.4% of variance of health promoting lifestyle. Conclusion The above findings indicate that it is necessary to develop a health promotion program facilitating exercise and enhancing health responsibility for Korean immigrants. It is suggested that the comparative study to identify the differences and similarities between Korean immigrants in the U.S.A. and Korean residents in Korea.

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The Effect of an Empowerment Program on the Health-promoting Behaviors of Iranian Women Workers: A Randomized Controlled Trial

  • Noori, Fatemeh;Behboodimoghadam, Zahra;Haghani, Shima;Pashaeypoor, Shahzad
    • Journal of Preventive Medicine and Public Health
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    • v.54 no.4
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    • pp.275-283
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    • 2021
  • Objectives: The workplace is an ideal place for encouraging health-promoting behaviors. Therefore, the aim of the present study was to determine the effect of an empowerment program on the health-promoting behaviors of women workers. Methods: This randomized clinical trial was conducted with 80 women workers employed at a food packaging facility in 2020. The subjects were selected using convenience sampling and were classified into intervention and control groups using block randomization. An empowerment program for women workers was conducted across 6 sessions based on an empowerment model. Data collection tools included a demographic questionnaire and the Health Promoting Lifestyle Profile-II, which participants completed both before the program and 8 weeks after the last session. Data analysis was performed in SPSS version 16 using descriptive analysis and inferential statistics. Results: There were no significant differences between the 2 groups in various health-promoting behaviors before the program. However, the intervention group's scores for nutrition (34.92±1.09 vs. 27.87±4.23), physical activity (24.40±2.94 vs. 17.40±5.03), stress management (26.35±2.60 vs. 23.05±4.27), spiritual growth (34.02±3.00 vs. 30.22±5.40), interpersonal relationships (30.82±2.38 vs. 27.60±4.61), and health responsibility (31.60±2.71 vs. 28.22±4.59) were significantly higher than the control group's 8 weeks after the program had ended. Moreover, there was a significant difference in the total score of health-promoting behaviors for the intervention group compared to the control group (179.00±9.22 vs. 151.42±20.25, p=0.001). Conclusions: An empowerment program for women workers led to significant improvements in the health-promoting behaviors of the participants. Similar programs can ultimately improve women's health in the workplace.

Effects of Growth Regulators on the Germination of Panax ginseng C.A. Meyer (인삼종자의 발아에 미치는 식물생장조절물질의 영향)

  • 권우생;정찬문
    • Journal of Ginseng Research
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    • v.10 no.2
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    • pp.159-166
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    • 1986
  • Effects of plant growth regulators on the germination of ginseng (Panax ginseng C.A. Meyer) seeds were investigated. Ginseng seeds germinated more vigorously in the treatments of kinetin and BA, and the promoting effect of kinetic on the germination and the growth of rootlet enhanced in low temperature ($10^{\circ}C$). However, GA did not promote the germination of dehiscent seed. The optimum temperature for germination of dehiscent seed was $10^{\circ}C$ and the range of effective concentration of kinetin for germination was 50 to 100 ppm.

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Effects of Sprouting Treatment with Gibberellin to Germination and the Growth of Spring Barley (지벨레린 최아처리가 춘파대맥의 발아생육에 미치는 영향)

  • Won-Jong Ik
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.7 no.1
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    • pp.117-121
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    • 1969
  • Germination and field test were made with the spring barley sprouted with gibberellin solution of 5 levels from 5 to 100 ppm. Temperatures of room for germination were classified as ordinary and low. Results obtained will be summarized as follows: 1. Sprouting with Gibberellin promoted the germination by two days in ordinary and three days in low temperature without reducing the germination rate. 2. The higher concentration of gibberellin showed the more promotion of growth in early stage. 3. No retardation of root-growth was found by gibberellin sprouting. 4. No promoting effects to germination by gibberellin sprouting was found in field tests. In high concentration, percentage of germination, number of spike and grain yields reduced remarkably. 5. More remarkable tendency of weak growth and longer duration of recovery were found in the higher concentration of gibberellin, but all plots recovered from weak growth at middle stage of plant growth. 6. In gibberellin concentration of 5 to 10 ppm, retardation of germination, weakness of early growth and reducing of spike number were not remarkable while length of spike and 1000 grain weight were increased. Therefore grain yields showed increasing tendency. 7. Promoting the germination may be expected but hastening of heading and maturing may not be available by gibberellin treatment in sprouting.

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Canola Plant Growth Promotion by a Selected Plant Growth Promoting-Rhizobacteria, Burkholderia pyrrocinia Strain 13-1 in the Cold Condition (고활성 근권생육촉진균주 Burkholderia pyrrocinia 13-1에 의한 저온조건에서의 유채생육촉진)

  • Lee, Jae-Eun;Cho, Sang-Min;Cho, Young-Eun;Park, Kyung-Seok
    • The Korean Journal of Pesticide Science
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    • v.13 no.4
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    • pp.262-266
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    • 2009
  • Plant growth-promoting rhizobacteria (PGPR) are beneficial native soil bacteria that colonize plant roots and result in increased plant growth. The objective of this study was to determine the plant growth promotion in canola plants by selected PGPR strain 13-1 under low temperature condition. The seed treatment of strain 13-1 was enhanced plant height and root elongation on canola plant at low temperature condition. This result determined that a selected strain of PGPR can enhance plant growth and root propagation under extremely low temperature conditions. Thus, this PGPR strain extends their role on plant growth promotion on canola until low temperature condition for practical applications.

Growth Responses of Lactic Acid Bacteria to Leguminous Seed Extracts (콩과식물 종실 추출물의 유산균에 대한 생육반응)

  • Lee, Hoi-Seon;Ahn, Young-Joon
    • Applied Biological Chemistry
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    • v.40 no.2
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    • pp.167-171
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    • 1997
  • Methanol extracts from 25 seed samples belonging to the family Leguminosae were subjected to an in vitro screening for their growth-promoting and inhibitory activities towards Bifidobacterium adolescentis, B. longum, B. bifidum, and Lactobacillus casei, using spectrophotometric and paper disc agar diffusion methods under $O_2-free$ conditions, respectively. The responses varied with both bacterial strains and plant species. Among seed extracts, extracts from Glycine max (light-green color) and Arachis hypogaea (dark-brown) enhanced the growth of lactic acid bacteria in media with or without carbon sources, suggesting that bifidus factor(s) might be involved in the phenomenon. This growth-promoting effect was most pronounced with L. casei among lactic acid bacteria used. Additionally, all seed extracts did not adversely affect the growth of the lactic acid bacteria tested.

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