This study aimed to investigate the effects of amino acid complex additives, such as protected vitamin C (VC) or detoxified sulfur (DS), on the growth and metabolism of Hanwoo cattle under high-temperature conditions. Accordingly, farms in Temperature-Humidity Index (THI) regions ranging from 78 to 89 for over 100 days were selected. The experimental groups were control, T1 (lysine + methionine + VC, 50 g/head/day), and T2 (lysine + methionine + DS, 50 g/head/day) with 70, 77, and 71 animals each. The range of the THI for 115 days was 78-89, and this occurred in most of the experiment days. The results showed that there was no significant difference in rectal temperature among the groups. The body weight increased to 786.4 and 809.0kg in the T1 and T2 groups, respectively, compared to the control group (p<0.05). Linoleic acid showed a high result of 2.01% in the T1 group compared to the control group (p<0.05). Unsaturated fatty acids were higher at 55.70 and 56.54% in the T1 and T2 groups, respectively, compared to the control group (p<0.05), and the omega 6/3 ratio was reduced to 20.10% (p<0.05). These findings indicate that T1 has a positive impact on growth, meat quality, and fatty acid composition compared to the control group. In conclusion, amino acid complex with VC improved the body weight of Hanwoo steers and the unsaturated fatty acids and essential amino acids of their meat; however, further research is needed to clarify this impact on carcass performance.

High levels of proinflammatory cytokines have been observed in obese pregnancies. Obesity during pregnancy may increase the risk of various pregnancyrelated complications, with pathogenesis resulting from excessive inflammation. Palmitic acid (PA) is a saturated fatty acid that circulates in high levels in obese women. In our previous study, we found that PA inhibited the proliferation of trophoblasts developing into the placenta, induced apoptosis, and regulated the number of cleaved halves derived from transfer RNAs (tRNAs). However, it is not known how the expression of tRNA-derived stress-induced RNAs (tiRNAs) changes in response to PA treatment at concentrations that induce inflammation in human trophoblasts. We selected concentrations that did not affect cell viability after dose-dependent treatment of HTR8/SVneo cells, a human trophoblast cell line. PA (200 μM) did not affect the expression of apoptotic proteins in HTR8/SVneo cells. PA significantly increased the expression of inflammatory cytokines including interleukin (IL)-1β, IL-6, IL-8 , and tumor necrosis factor (TNF)-α . In addition, 200 μM PA significantly increased the expression of tiRNAs compared to 800 μM PA treatment. These results suggest that PA impairs placental development during early pregnancy by inducing an inflammatory response in human trophoblasts. In addition, this study provides a basis for further research on the association between PA-induced inflammation and tiRNA generation.

Salinity is a major abiotic stress for crop plants that cause reduced food production. The application of plant growth-promoting microorganisms can improve the adaptability of plants to biotic and abiotic stresses. Therefore, in the current study, we aimed to enhance the mitigation effects of artificially applied rhizobacterium Klebsiella variicola AY13 on salinity stress in Trifolium repens L. The results suggested that AY13 innately produced indole-3-acetic acid and accelerated the morphological adaptation of T. repens to salt stress conditions. Furthermore, AY13 promotes a Trp-dependent pathway for indole-3-acetic acid (IAA) production, as adding L-tryptophan (L-Trp) increased IAA production in pure culture. AY13 improved plant growth by maintaining relative water content and minimizing water loss in excised leaves. Moreover, AY13 inoculation significantly reduced the endogenous levels of abscisic acid and antioxidants such as glutathione and catalase. These results suggest that AY13 plays a crucial role in reprogramming stress-related metabolism and enhancing plant stress tolerance.

살리실산은 식물의 생장 및 발달, 항산화 방어기작, 광합성 작용 그리고 생물적 및 비생물적 스트레스 조건에서 다양한 생리적 기능을 조절하는 물질로 알려져 있다. 본 연구에서는 고온･건조 스트레스 조건에서 살리실산 경엽처리가 고추의 생육, 광합성 특성 및 항산화효소 활성에 미치는 영향을 구명 하고자 하였다. 광합성 특성 측정결과 광합성 속도, 기공전도 도 및 증산 속도가 증가하였고, 3회차 처리에서 가장 높았다. 세포내 MDA와 H2O2 함량은 살리실산 3회차 처리에서 현저 하게 감소하는 경향을 보였다. APX, CAT, POD 및 SOD 활 성이 현저하게 증가하였으며, 무처리 대비 최대 247, 318, 55 및 54% 증가하였다. 고추의 생육 특성은 무처리구와 유의한 차이를 보이지 않았으나, 상품 수량은 15% 정도 증가하였다. 이러한 결과들을 종합해 볼 때, 살리실산의 경엽처리는 고추 의 광합성 특성과 항산화효소 활성을 증진시켜 고온･건조 스트 레스에 의한 피해 경감에 긍정적 효과를 유발함을 확인하였다

This study evaluated the effect of a combination of acetaminophen (AAP), vitamin C (VC) and thioctic acid (TA) on reducing serum cortisol concentrations in mice with foot-and-mouth disease (FMD) vaccination. For 5 days from 3 days before FMD vaccination to 2 days after vaccination, mice were orally administered with AAP 600 mg/kg feed (n=25, AAPT), combination of AAP 600 mg and VC 200 mg per kg feed (n=25, AVCT) and combination of AAP 600 mg, VC 200 mg and TA 20 mg per kg feed (n=25, AVTT), respectively. From day 1 to day 7 after FMD vaccination, the cortisol concentration of all groups treated with the drug was significantly decreased compared to that of the positive control group with FMD vaccination (p<0.05). In conclusion, the combined treatment of AAP, VC and TA was the most effective in relieving stress from FMD vaccination compared to the single treatment.

Pollution of agricultural soil by alkaline salts, such as Na2CO3, is a critical and long-lasting problem in cultivable land. The aim of the study was to examine the putative role of citric acid (CA) in alleviating Na2CO3-stress in alfalfa. In this study, Na2CO3 significantly induced leaf chlorosis, inhibited plant growth and photosynthesis related parameters, increased hydrogen peroxide (H2O2) and reduced major antioxidant enzymes (SOD ,CAD, APX) in alfalfa. However, the presence of CA these negative effects of Na2CO3-stress largely recovered. Interestingly, expression of antioxidant and ion transporter genes (Fe-SOD, CAT, APX, DHAR and NHX1) involved in Reactive oxygen species (ROS) homeostasis and oxidative stress tolerance in alfalfa. These findings suggest that CA-mediated Na2CO3 stress alleviation is an ecofriendly approach that would be useful to local farmer for alfalfa and other forage crop cultivation in alkaline soils.

Salicylic acid (SA) is an essential plant growth regulator that functions as a signaling molecule in plants. The purpose of this study was to clarify how the exogenous application of SA counteracts aluminum stress-induced growth and biomass yield reduction in alfalfa exposed to aluminum (Al) stress. Two-week-old alfalfa seedlings were exposed to a combination of AlCl3 (0 μM, 50 μM and 100 μM, respectively) and SA (0.1 mM) for 72 hours. We observed, Al stress-induced plant growth inhibition and forage yield reduction are Al stress-dependent manner. A significant reduction of plant height (42.0-52.9%), leaf relative water content (13.0-21.4%), root length (35.4-48.7%), shoot fresh weight (31.2-25.9%), root fresh weight (15.4-23.3%), shoot dry weight (12.7-22.2%), roots dry weight (47.3 -53.5%), were observed in alfalfa. In contrast, SA alleviated the Al-stress and enhanced growth and biomass yield in alfalfa. This study provides useful information concerning the role of SA that counteracts aluminum stress-induced growth and yield reduction in alfalfa.

This study investigated the pharmacodynamics of betaine on the blood profile and short chain fatty acid levels in meat ducks exposed to heat wave. 400 heads of Cherry valley (Anasplatyrhynchos) meat ducks were completely randomized to 5 treatments (4 repetitions each), and were raised for 42 days. They were grouped into T1 (heat wave control group without betaine), T2 (betaine 400 ppm), T3 (betaine 800 ppm), T4 (betaine 1200 ppm), and T5 (normal control group without betaine). Compared to T1, the betaine addition groups showed higher body weight gain at shipment, with T3 showing the highest significant difference. For hematological indictors measured (red blood cells and platelets), the betaine addition groups showed significantly higher values than the heat wave control group. The pH of the former was lower but their electrolytes (K+, P+, and Cl-) were significantly higher compared to the latter. For blood gas concentration, the former showed a significantly higher value than the latter. For the total short chain fatty acids, acetic acid, and propionic acid, the betaine addition groups and group fed broiler-high temperature diet showed higher values than the heat wave control group. On the other hand, the former showed significantly lower values in butyric acid, isobutyric acid, valeric acid, and isovaleric acid than the latter group. These results suggest that betaine has the pharmacodynamics that mediate heat stress, via the maintenance and control of the blood profile, osmotic pressure, gas concentration, and short chain fatty acid, of meat ducks under heat wave.

This study was carried out to investigate the effects of feeding the broilers that are exposed to extreme heat stress by control of inverse lighting times with night restricted feeding of extreme heat diet(EHD1, 2: extreme heat diet) containing different amount of soy oil, molasses, amino acids and vitamin C on short chain fatty acid and blood lipid profile. 300 broiler chickens(Abaica strain) were randomized into four dietary treatment groups according to a randomized block design on the day they were hatched. The four dietary treatment groups were: T1(EHD 1, 10:00~19:00 Dark, 19:00〜10:00 Light), T2(EHD 2, 10:00〜19:00 Dark, 19:00〜 10:00 Light), T3(EHD 1, 09:00〜18:00 Dark, 18:00〜09:00 Light), T4(EHD 2, 09:00〜18:00 Dark, 18:00~09:00 Light). The body weight gain of the broilers was highest in T2, and high in order T1, T4, T3(p<0.05). Weights of the lymphoid organ, thymus and bursa of Fabricius were high in T1, T2 as compared to T3, T4 but spleen was lower in T4 than T1, T2, T3(p<0.05). Blood triglyceride, total cholesterol and glucose were higher in T1, T2 than T3, T4(p<0.05). LDL-C was high in orderT4, T3, T2, T1 but HDL-C showed the opposite trend(p<0.05). Blood concentrations of IgG, IgG and IgM were higher in T1, T2 than inT3, T4, but the corticosterone concentration decreased significantly in them. In T1 and T2, Lactobacillus in the feces increased, but total aerobic bacteria, E.coli, coliform bacteria was decreased rather significantly, compared with those in T3 and T4(p<0.05). Concentrations of acetic acid, propionic acid and total SCFA in cecum were high in order T2, T1, T3, T4, but butyric acid, isobutyric acid, valeric acid, isovaleric acid were lower in T1, T2 than in T3, T4 (p<0.05).

본 연구는 폭염 스트레스(extreme heat stress, EHS, 33±2℃)에 노출된 브로일러에서 대두유, 당밀, 아미노산, 비타민 C를 적절하게 함유하는 폭염사료 (extreme heat stress diet, EHSD)급여가 짧은 사슬지방산 및 성장능력에 미치는 영향을 조사하였다. 부화 당일 Ross 308 병아리 500 마리를 5처리구로 완전임의배치 하였다. 각 처리구는 4반복을 가졌으며 각 반복은 25마리씩 배치하였다. 처리구는 역전점등과 함께 T1 (일반환경+기초사료 basal diet, BD), T2 (EHS+BD), T3 (EHS+BD 내 우지를 대두유로 대체 및 당밀 2%를 함유하는 EHSD), T4 (EHS+BD 내 우지를 대두유로 대체, 당밀 2%, 메치오닌과 라이신을 각각 일반사료의 1.5배씩 함유하는 EHSD), T5 (EHS+BD 내 우지를 대두유로 대체, 당밀 2%, 메치오닌과 라이신을 각각 일반사료의 1.5배씩 추가 및 비타민 C 200 ppm을 함유하는 EHSD)로 구분하였다. 브로일러의 증체량은 T1, T2와 비교할 때 T4, T5에서 유의하게 증가하였다. 그리고 면역기관, F낭, 흉선, 비장의 무게는 서로 비슷하였다. 또한 혈청 IgG, IgA, IgM 농도는 T4, T5가 T1, T2에 비교할 때 높았으나 코르티코스테론 농도는 유의하게 낮아졌다. 특히 맹장의 Lactobacillus는 T4, T5가 T1, T2에 비해서 증가하였으나 Escherichia, Coliform, Total aerobic bacteria는 오히려 유의하게 감소하였다. 초산, 프로피온산 및 총 짧은 사슬지방산 함량은 T4, T5가 T1, T2와 비교할 때 유의하게 높았다.

인위적인 산성스트레스가 담수산 소백옆새우(Gammarus sobaegensis Ueno)에 미치는 영향을 정체성 수조건 하에서 급, 만성 생태독성실험을 통해 알아보았다. 급성독성 실험 시 pH 3 대역에서의 반수치사시간(LT50)은 평균 0.271(±0.146)day로 개체의 크기 또는 먹이의 유무 그리고 주변 환경에 대한 적응능력에 관계없이 일정한 모습을 나타내고 있었다. pH4.0대역에서의 LT50은 0.812(±0.

Chinese cabbage grown during autumn season is confronted with drought conditions for a certain period, especially during the early growth stage. In this study, we investigated the effects of drought stress on plant growth characteristics, as well as free amino acid, carotenoid, and proline in Chinese cabbage. Chinese cabbage seeds (Bulam Plus) were germinated, and all the seedlings were transplanted into plastic containers (28 ㎝ diameter × 22 ㎝ high) containing a commercial growth medium. The soil water content was measured and maintained at 10% for the drought-stressed plants and at 30% for the control plants, for three weeks. The results revealed that plant growth parameters were lower in the drought-stressed plants than in the control plants. The total free amino acid content tended to decrease in both drought-stressed and control plants with time. The total free amino acid content was found to be lower in the drought-stressed plants than in the control plants and the proline content was unaffected. Moreover, at three weeks after treatment, carotenoid content in drought stressed plants was significantly higher than that in the untreated plants. We believe that our study makes a significant contribution to the literature because the effects of drought stress on plant growth parameters, free amino acid, carotenoids, and proline accumulation in autumn growing cultivar of Chinese cabbage have not been widely studied in Korea, and our study provides valuable information in this regard, as Chinese cabbage is consumed throughout the year in Korea.

Several E3 ubiquitin ligases have been associated with the response to abiotic and biotic stresses in higher plants. Here, we report that the hot pepper (Capsicumannuum) abscisic acid (ABA)-InsensitiveRINGprotein1gene(CaAIR1) is essential for a hypersensitive response to drought stress. CaAIR1 contains a C3HC4-type RING finger motif, which plays a role for attachment of ubiquitins to the target protein, and a putative transmembrane domain. The expression levels of CaAIR1 are upregulated in pepper leaves by ABA treatments, drought, and NaCl, suggesting its role in the response to abiotic stress. Our analysis showed that CaAIR1 displays self-ubiquitination and localized in the nucleus. We generated CaAIR1-silenced peppers via virus-induced gene silencing (VIGS) and CaAIR1-overexpressing (OX) transgenic Arabidopsis plants to evaluate their responses to ABA and drought. VIGS of CaAIR1 in pepper plants conferred an enhanced tolerance to drought stress, which was accompanied by low levels of transpirational water loss in the drought-treated leaves. CaAIR1-OX plants displayed an impaired sensitivity to ABA during seed germination, seedling, and adult stages. Moreover, these plants showed enhanced sensitivity to drought stress because of reduced stomatal closure and decreased expression of stress-responsive genes. Thus, our data indicate that CaAIR1 is a negative regulator of the ABA-mediated drought-stress tolerance mechanism.

Drought and high salinity are the most important abiotic factors limiting plant development, growth, and crop productivity in agriculture (Munns and Tester 2008, Sengupta and Majumder 2009, Zhu 2002). As sessile organisms, plants are frequently exposed to drought and high salinity conditions, which alter water potential and cause osmotic stress, leading to serious damage to plant tissues (Bartels and Sunkar 2005, Boudsocq and Lauriere 2005). During exposure to water stress, plants display many physiological changes, such as reduction of water content, closure of stomata, and decreased cell enlargement and growth. In addition, severe and continuous water stress in plants causes the cessation of photosynthesis and disturbance of metabolism, and finally results in death (Nath et al. 2005, Shao et al. 2008). To adapt to these abiotic stress conditions, plants show a variety of responses, including the accumulation of abscisic acid (ABA) and expression of a large number of stress-related proteins (Krasensky and Jonak 2012, Lee and Luan 2012, Skriver and Mundy 1990, Stewart and Lee 1974). Although the cellular and molecular responses to environmental stress are well studied (Hasegawa et al. 2000, Thomashow 1999), the mechanisms underlying the functional modifications caused by osmotic stress are yet to be clarified, because of the complexity at the cellular level as well as at the whole plant level (Ashraf and Harris 2004, Flowers 2004, Foolad et al. 2003a, 2003b, Xiong et al. 2002).

물 자원이 제한되거나 관수 설비가 갖추어지지 않은 곳에서 찰옥수수의 한발 피해를 줄이고자, 종실용 옥수수에 대한 수분 스트레스 경감 효과가 보고되어진 살리실산과 앱시식산의 처리 효과를 살펴보았다. 출웅기 9일 전부터 출웅 후 14일까지 관수를 중단하였으며, 생장조절제는 출웅기에 1회 처리하였다. 살리실산과 앱시식산의 처리 농도는 각각 0.5 mM과 0.1 mM이었다. 한발 처리에 의해 ASI가 3.0~3.3일 늘어났으며, 간장은 47~51 cm, 이삭장은 4.6~5.0 cm, 이삭경은 4.4~5.3 mm, 열수는 1.5~2.0개, 수량은 2.4~2.5 Mg/ha 줄었다. 살리실산과 앱시식산의 처리에 의한 한발 피해의 경감 효과는 뚜렷하지 않았다. 찰옥수수에 대한 살리실산과 앱시식산의 한해 경감 효과를 위해서는 수분 부족 스트레스를 받기 이전에 처리하거나, 저농도로 몇차례에 나누어 처리하는 것이 필요한 지에 대한 추후 검토가 필요하다.