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| 1 | Exogenous abscisic acid coordinating leaf senescence and transport of assimilates into wheat grains under drought stress by regulating hormones homeostasis显示文摘Drought at the grain filling stage of wheat will cause premature leaf senescence, thus leading to considerable loss of wheat yield. Therefore, this paper aims to establish a cultivation technology for strong drought resistance, delayed senescence, and yield improvement based on the analysis of hormones homeostasis obtained by applying chemical control substances. Experiments were conducted with two genotypes of wheat. Four water irrigation treatments were applied to impose the water deficit, including well-watered control treatment(WW), mild water deficit(MiWD), moderate water deficit(MoWD), and severe water deficit(SWD). Exogenous abscisic acid(ABA) was sprayed on the plants at the anthesis stage of the wheat. As a result, exogenous ABA reduced initial senescence rate(r0), total duration of chlorophyll(Chltotal), rapid senescence phase(Chlloss), and the accumulated temperature at an inflection point(M) but improved the persistence phase(Chlper) of flag leaves under all of the four treatments. However, exogenous ABA produced inconsistent effects on photoassimilate relocation and grain weight under different treatments. It produced positive regulatory effects on grain weight under WW, MiWD, and MoWD treatments. On the one hand, spraying ABA during the persistence phase of flag leaves reduced the ratios of zeatin to gibberellin(Z/GA3), spermine to spermidine(Spm/Spd), and salicylic acid to ABA(SA/ABA),which prolonged active photosynthesis by stimulating high level of proline(Pro) and increased the activities of antioxidant enzymes, such as superoxide dismutase(SOD), peroxidase(POD), catalase(CAT), and ascorbate peroxidase(APX). Therefore, drought tolerance was enhanced, and more photosynthetic assimilates were accumulated. On the other hand, the rapid senescence phase and the transport rate of assimilates into grains were accelerated, resulting in higher grain weight, yield, and water use efficiency(WUE). However, under SWD treatment, exogenous ABA improved the ratio of SA/ABA, leading to low Pro content and low antioxidant enzyme activity of flag leaves in the rapid loss phase. Meanwhile,drought resistance declined and the transport duration of assimilates into grains was shortened, thus making photosynthetic assimilates redundant. Therefore, exogenous ABA can lead to the reduction in grain weight, yield, and WUE of wheat under SWD treatment. | Yongli Luo Wenqian Li Cui Huang Junhao Yang Min Jin Jin Chen Dangwei Pang Yonglan Chang Yong Li Zhenlin Wang | 2021 | The Crop Journal2021，9，4： | 4 |
| 2 | Interactions between cytokinin and nitrogen contribute to grain mass in wheat cultivars by regulating the flag leaf senescence process显示文摘Premature senescence after anthesis reduces crop yields.Delaying leaf senescence could maintain photosynthetic activity for a longer period and lead to a higher photosynthetic rate.Recent studies have provided some insights into the interaction between cytokinin and nitrogen(N)in the regulation of plant development.In the present study,foliar application of exogenous 6-benzylaminopurine(6-BA)and lovastatin,an inhibitor of cytokinin synthesis,was combined with three N rates[0 kg ha^(-1)(low nitrogen,LN),240 kg ha^(-1)(normal nitrogen,NN),and 360 kg ha^(-1)(high nitrogen,HN)]in two wheat cultivars,Wennong 6(with a staygreen phenotype)and Jimai 20(with a non-staygreen phenotype).Flag leaf senescence was assessed using a Gompertz growth curve.Grain mass,dry matter accumulation and distribution,total N of flag leaf,and concentrations of zeatin riboside(ZR)and abscisic acid(ABA)were also used to evaluate the functional characteristics of flag leaves.Grain mass was negatively correlated with initial senescence rate(r_0)and duration of rapid chlorophyll loss(Chl_(loss)),whereas it was positively correlated with maximum senescence rate(r_(max)),average senescence rate(r_(aver)),persistence phase(Chl_(per)),total duration of flag leaf(Chl_(total))and inflection point cumulative temperature(M).Compared to Jimai 20,Wennong 6 had larger r_(aver),Chl_(per),and Chl_(total).The concentration of ZR was highest under the 6-BA×NN treatment,followed by the 6-BA×HN and 6-BA×LN treatments.However,the concentration of ABA showed the opposite trend.It was concluded that the staygreen phenotype Wennong 6 was associated with greater grain mass and altered cytokinin metabolism and could be classified as a functional staygreen type.Foliar application of 6-BA interacting with N at the NN level(240 kg ha^(-1))may be a beneficial strategy for improving grain yield of wheat by regulating endogenous hormones and the flag leaf senescence process.Increasing endogenous cytokinin promoted the transport of dry matter to grain. | Yongli Luo Yuhai Tang Xin Zhang Wenqian Li Yonglan Chang Dangwei Pang Xu Xu Yong Li Zhenlin Wang | 2018 | The Crop Journal2018，6，5： | 2 |
| 3 | Maternal urinary bisphenol A levels and infant low birth weight: A nested case–control study of the Health Baby Cohort in China显示文摘 | Wenqian Huo Wei Xia Yanjian Wan Bin Zhang Aifen Zhou Yiming Zhang Kai Huang Yingshuang Zhu Chuansha Wu Yang Peng Minmin Jiang Jie Hu Huailong Chang Bing Xu Yuanyuan Li Shunqing Xu | 2015 | Environment International2015，，： | 1 |
| 4 | An outbreak of Mycobacterium marinum infection associated with handling seabass in China显示文摘To the Editor:Mycobacterium marinum is a nontuberculous mycobacterium that can cause opportunistic infections in humans,ranging from a single cutaneous lesion to disseminated disease.[1]It was first isolated from a fish in 1926 and identified as a cause of human infection in 1951.[1]The estimated annual incidence ranges from 0.04 to 0.27 per 100,000 persons in different countries.Outbreaks of M.marinum infections related to handling fish are not common,but have also been reported. | Qing Zhao Fangfang Bao Zihao Mi Zhenzhen Wang Pengcheng Huai Qing Pan Zheng Pang Yaoming Li Nan Cao Xiaotong Xue Buyan Li Xuechao Chen Jinliang Wang Yanxia Cui Wenqian Chang Yuan Zhang Zhenhua Yue Yongxia Liu Zhenhua Wang Weiguo Yan Jinyong Li Hongqing Tian Xianmei Lu Guizhi Zhou Jianjun Liu Hong Liu Furen Zhang | 2022 | Chinese Medical Journal2022，135，21： | 1 |
| 5 | Biomarkers for early diagnosis of autism obtained through bioinformatics analysis of human blood sample显示文摘Objective:autism spectrum disorder(ASD),a serious disorder that begins early in life,con-tinues throughout the lifespan.Children with ASD who are diagnosed early are more responsive to therapeutic interventions and have less social and language impair-ment than children diagnosed later;however,current di-agnostic measures are mostly applied to children older than one year and lack the appropriate biological markers for early diagnosis of ASD.Using bioinformatic analy-sis,this study explores the molecular information mech-anism of ASD.Method:in this study,we used dataset GSE6575 from Gene Expression Omnibus(GEO)to an-alyze the mRNA expression profile of ASD,including 35 ASD samples and 12 normal control samples looking for different genes and we did enrichment analysis of those genes.We then used the STRING database to construct a protein-protein interaction(PPI)network of differential genes.Finally,Cytoscape plug-in cytoHubba was used to search for hub genes.The diagnostic value of the hub genes was verified by subject operating characteristic curves.Result:we looked for 50 different genes and did an enrichment analysis of those genes.The results of the enrichment analysis showed that these differential genes were mainly concentrated in the response to viruses,the immune regulation of inflammation and energy metabo-lism.Using Cytoscape plug-in cytoHubba,we found ten different genes.We drew ROC curves for all ten genes among which two genes,interleukin 2 receptor subunit beta(IL2Rβ)and perforin 1(PRF1),had good sensitivity and specificity for the early diagnosis of autism.The ar-eas under the ROC curves were 0.855,0.830 for IL2Rβ,PRF1.Conclusion:data analysis using the GEO data-base can provide new insights into the etiology of ASD as well as some possible biomarkers and therapeutic targets for early diagnosis and treatment of ASD. | Liuyin Jin Linman Wu Zhilan Yang Junyi Xiang Wenqian Xu Chang Shu Gaohua Wang | 2021 | Journal of Translational Neuroscience2021，6，4： | 0 |
| 6 | 半干旱沙漠中樟子松和沙柳造林后土壤有机碳及其组分的小尺度空间分布显示文摘半干旱沙漠造林有助于改善土壤功能以及增加土壤有机碳(SOC)固定,但人们对造林后SOC及其不稳定(LOC)组分的小尺度空间分布了解甚少。本研究以毛乌素沙地东南缘樟子松(Pinus sylvestris)和沙柳(Salix psammophila)为研究对象,量化了距离树体20、80、150和240 cm处SOC、LOC组分及其相关变量的小尺度空间分布。研究结果表明,沙柳和樟子松造林显著提高了SOC、总氮(TN)、可溶性有机碳(DOC)、微生物碳(MBC)和易氧化有机碳(ROOC)含量;在距离树体20 cm处,0-100 cm土层樟子松SOC储量比沙柳高27.21%;在距离树体80和150 cm处,沙柳SOC储量分别比樟子松高5.50%和5.66%;与流沙地相比,在距离树体20、80、150和240 cm处,沙柳和樟子松SOC储量显著增加了94.90%、39.50%、27.10%和18.50%;沙柳和樟子松ROOC分别占SOC的14.09%和18.93%。总之,造林促进了半干旱流沙地SOC的积累,樟子松比沙柳分配更多的有机质到距离树体<80 cm范围内的土体中。 | Zhilong Lan Shaolei Zhang Tanveer Ali Sial Luyao Wu Wenqian Chang Xiong Li Jianguo Zhang Jinglong Fan | 2022 | Journal of Plant Ecology2022，15，1： | 0 |
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