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Meta-analysis of the effect of melatonin application on abiotic stress tolerance in plants
Yang Xiaoxiao,Ren Jianhong,Li Juanjuan,Lin Xinyue,Xia Xiangyu,Yan Wenjie,Zhang Yuxin,Deng Xiping,Ke Qingbo 한국식물생명공학회 2023 Plant biotechnology reports Vol.17 No.1
Melatonin is a hormone-like substance that promotes plant growth and development and alleviates stress levels. Although the physiological roles of melatonin and the underlying mechanisms have been qualitatively reviewed in plants, we do not fully understand when and how to apply melatonin to maximize its benefits. Here, we performed a meta-analysis to quantitatively evaluate the effect of melatonin on abiotic stress tolerance in plants and to determine the number of parameters modulated by melatonin. Melatonin significantly alleviated the growth inhibition induced by drought stress compared with other abiotic stresses, including salt, cold, heat, nitrogen deficit, and heavy metal toxicity, mainly owing to higher photosynthesis efficiency and antioxidant enzyme activity. Furthermore, melatonin modulated plant growth in a concentration-dependent manner and was more effective when applied to plants under moderate drought stress at an early stage via root irrigation. In addition, the impact of melatonin was greater in monocots than in dicots. Moreover, endogenous melatonin levels could be significantly increased via transgenic strategies. Among melatonin biosynthesis-related gene members, ASMT has tended to have the most influence on melatonin content in plants. In light of the rapidly developing genome editing technology, quantitatively increasing endogenous melatonin level in plant would be quite useful for moderating climatic conditions and combating desertification. Taken together, our results provide guidelines for melatonin application in crops plants for improving productivity under ongoing climate change.
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Jia-Fen Wu,Xiaoxiao Lin 한국과학학술지편집인협의회 2021 Science Editing Vol.8 No.1
Purpose This study analyzed the bibliometric characteristics of publications on inclusive education in the Social Science Citation Index and Science Citation Index Expanded in the Web of Science Core Collection from 1992 to 2020. Methods Terms related to “inclusive education” and “inclusion of education” were used as keywords to search for journal articles on July 3, 2020. Results There were 1,786 articles, representing 3,376 authors, in the 345 journals scanned. The United States, United Kingdom, and Australia were the three leading countries/regions in this field. In the top 12 countries, the top 15 institutions and the top 10 most-cited journals were identified by either the number of publications or the number of total citations. Core themes from the 30 most highly-cited articles were teachers’ attitudes, teachers’ self-efficacy, and the effects of inclusive education. Teachers included both pre-service and in-service teachers; students represented those with and without special educational needs. Conclusion The results indicate that the United States, United Kingdom, and Australia dominated inclusive education research, originating most of the highly-cited articles, having more prolific authors, and presenting the most-cited institutions. Furthermore, three emerging core themes from the 30 most highly-cited articles were teachers’ attitudes, teachers’ self-efficacy, and the effects of inclusive education. Frontline teachers are recommended to submit manuscripts about their teaching experiences to the most-cited journals, which have a large readership. To measure the effects of inclusive education, it is essential to formulate reliable, valid, and culture-free research instruments for future studies.
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Changes in plant anthocyanin levels in response to abiotic stresses: a meta-analysis
Yan Wenjie,Li Juanjuan,Lin Xinyue,Wang Lina,Yang Xiaoxiao,Xia Xiangyu,Zhang Yuxin,Yang Shaoyu,Li Hongbing,Deng Xiping,Ke Qingbo 한국식물생명공학회 2022 Plant biotechnology reports Vol.16 No.5
Anthocyanins are small molecule antioxidants that play important roles in plant response and resistance to abiotic stresses. Their levels increase when plants are exposed to abiotic stress. However, the general response patterns and magnitude of anthocyanin increase, and how they confer resistance to abiotic stresses, are difficult to evaluate because of the influence of experimental variables. In this study, changes in plant anthocyanin content under different abiotic stresses and the effect of anthocyanin overproduction on various physiological indicators were investigated through meta-analysis derived from 1039 datasets of 102 studies. Results showed that among the different stress types, heavy metals, especially copper (Cu) and mercury (Hg), induced the most significant synthesis of anthocyanins. Among the different types of drought treatments, mannitol caused anthocyanin content in plants to increase by 2.4-fold, which was more significant than that of polyethylene glycol and natural drought. Furthermore, UV stress led plant anthocyanins to increase 1.3-fold in C4 plants, which was higher than that in C3 plants. In addition, anthocyanins increased the most when the applied stresses were low and moderate, and of short duration. Moreover, plants overexpressing genes encoding MYB transcription factors increased anthocyanin content by 5.8-fold and significantly improved plant stress tolerance. Among the 21 physiological indicators, glutathione and proline levels increased the most in transgenic plants overproducing anthocyanins when exposed to abiotic stress. Taken together, this meta-analysis indicates that anthocyanins enhance stress tolerance by improving the antioxidant, metal-chelating, and osmoregulatory abilities of the plant. The results presented here can help guide future applications of anthocyanins as plant growth regulators in dryland agriculture and breeding for plant stress tolerance.
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Hao-Kai Peng,YanTing Wang,Ting-Ting Li,Ching-Wen Lou,XiaoXiao Wang,Jia-Horng Lin 한국섬유공학회 2020 Fibers and polymers Vol.21 No.4
In order to make conductive woven fabrics with electromagnetic shielding effectiveness (EMSE) and flameretardance, polysufonamide (PSA)/stainless steel (SS) core yarn are used as the weft yarns and PSA yarns are used as thewarp yarns. The conductive woven fabrics are denoted as SS-60, SS-80, SS-100, SS-120, and SS-140 according to the twistcounts of the core yarn, and evaluated in terms of mechanical properties, flame retardance, surface resistivity. The test resultsshow that the best twist of the core yarn is 120 turns/10 cm. SS-60 has the maximum burnt length, while SS-140 has theminimum burnt length. Moreover, the surface resistivity of the PSA/SS woven fabrics is proportional to the twist counts, andthe surface resistivity along the warp direction is higher than that along the weft direction. Changing the fabric laminationangle can form a complete shielding network, and the EMSE is significantly increased. For SS-80, SS-100, and SS-120,when they are composed of 4-6 layers with lamination angles of 0 o/45 o/90 o/-45 o/0 o/45 o and 0 o/90 o/0 o/90 o/0 o/90 o, theEMSE is above 40 dB and the shielding effect is above 99.99 % against the incident waves at 2000-3000 MHz. Specifically,SS-120 has the maximum EMSE of 64 dB against incident waves at 2844 MHz.
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