Drought tolerance levels and antioxidant protection mechanisms were evaluated for 21 traditional rice varieties of Assam, India, along with Sahbhagi Dhan （drought tolerant） and IR64 （drought sensitive） as controls...Drought tolerance levels and antioxidant protection mechanisms were evaluated for 21 traditional rice varieties of Assam, India, along with Sahbhagi Dhan （drought tolerant） and IR64 （drought sensitive） as controls. Drought was imposed in hydroponic culture with polyethylene glycol 6000 （PEG6000） that was initially standardized with different concentrations. All the rice varieties showed apparent decreases in growth characteristics under drought stress （initially at 15% for 7 d followed by 20% PEG6000 for 7 d in Yoshida medium）. On the basis of standard evaluation score （SES）, eight rice varieties showed high drought tolerance which were carried forward for further biochemical analyses. Based on different morpho- physiological parameters, SN03 （Bora）, SN04 （Prosad Bhog）, SN05 （Kola Joha）, SN06 （Helash Bora）, SN08 （Salihoi Bao）, SN12 （Kola Amona）, SN20 （Ronga Bora） and SN21 （Sok-Bonglong） were identified as promising drought tolerant varieties. The non-enzymatic antioxidants activities viz., glutathione, ascorbate and enzymatic antioxidant activities such as superoxide dismutase （SOD）, catalase （CAT）, guaiacol peroxidase （GPX）, ascorbate peroxidase （APX）, glutathione reductase （GR） in shoots and roots of all the selected varieties revealed significant level of protection mechanisms as compared with controls. Enhancement in activities of the overall antioxidant enzymes including SOD, GPX, CAT, GR and APX under drought stress reflects their role in the adaptation process under water stress.展开更多
Assessing soil quality is essential for crop management and soil temporal changes. The present study aims to evaluate soil quality in the Ferralitic soils context countrywide. This assessment was done using multivaria...Assessing soil quality is essential for crop management and soil temporal changes. The present study aims to evaluate soil quality in the Ferralitic soils context countrywide. This assessment was done using multivariate soil quality indice (SQI) models, such as additive quality index (AQI), weighted quality indexes (WQI<sub>add</sub> and WQI<sub>com</sub>) and Nemoro quality index (NQI), applied to two approaches of indicator selection: total data set (TDS) and minimum data set (MDS). Physical and chemical soil indicators were extracted from the ORSTOM’s reports resulting from a sampling campaign in different provinces of Gabon. The TDS approach shows soil quality status according to eleven soil indicators extracted from the analysis of 1,059 samples from arable soil layer (0 - 30 cm depth). The results indicated that 87% of all provinces presented a very low soil quality (Q5) whatever the model. Among soil indicators, exchangeable K<sup>+</sup> and Mg<sup>2+</sup>, bulk density and C/N ratio were retained in MDS, using principal component analysis (PCA). In the MDS approach, 50 to 63% of provinces had low soil quality grades with AQI, WQI<sub>add</sub> and NQI, whereas the total was observed with WQI<sub>com</sub>. Only 25% of provinces had medium soil quality grades with AQI and NQI models, while 12.5% (NQI) and 25% (AQI) presented high quality grades. Robust statistical analyses confirmed the accuracy and validation (0.80 r P ≤ 0.016) of AQI, WQI<sub>add</sub> and NQI into the TDS and MDS approaches. The same sensitivity index value (1.53) was obtained with AQI and WQI<sub>add</sub>. However, WQI<sub>add</sub> was chosen as the best SQI model, according to its high linear regression value (R<sup>2</sup> = 0.82) between TDS and MDS. This study has important implications in decision-making on monitoring, evaluation and sustainable management of Gabonese soils in a pedoclimatic context unfavorable to plant growth.展开更多
Objective:To evaluate the diagnostic efficacy and clinical application of the Obstetrical Chinese Disseminated Intravascular Coagulation(DIC)Scoring System(OCDSS).Methods:This study is a retrospective study that colle...Objective:To evaluate the diagnostic efficacy and clinical application of the Obstetrical Chinese Disseminated Intravascular Coagulation(DIC)Scoring System(OCDSS).Methods:This study is a retrospective study that collected 1063 cases from Wuhan Union Hospital,Yichang Central People’s Hospital,and the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture between July 2017 and June 2024.These cases were divided into DIC and non-DIC groups based on score standard.Diagnosis of DIC,the rate of hysterectomy,neonatal mortality,and severe asphyxia are the main outcome measures.All the laboratory indicators are all determined by clinical laboratory department of the hospital.Data were expressed as mean±standard deviation or median(interquartile range)and frequencies.Independent sample t-test or non-parametric test were used to compare measurement data,while the chi-square test was used for count data.Receiver operating characteristic(ROC)curve and area under curve(AUC)were used to test the predictive accuracy.Using univariate and multivariate logistic regression analysis to study the high-risk factors.P<0.050 indicates a statistical significance.Results:Of 1063 participants in this study,29 participants(2.73%)were diagnosed with obstetrical DIC by OCDSS score standard,and all the participants were diagnosed as DIC with underlying disease.When the Takao,Clark,and Erez score standard is the“gold standard”,the OCDSS score standard always shows good sensitivity and specificity,with all the AUC over 0.75.OCDSS score standard also has better predictive of hysterectomy(68.18%,91.07%,0.872),severe neonatal asphyxia and death(79.17%,75.07%,0.842)than the other three score standards.All the indicators included in the OCDSS score standard contributed to the DIC diagnosis(all the P<0.001).The indicators in the DIC group were more abnormal than the non-DIC group(all the P<0.001).Conclusion:OCDSS is a first score standard,especially for pregnancies,it considers the underlying disease,clinical symptoms,and laboratory results.This score system shared a good diagnosis performance for DIC in the Chinese population and may help clinicians make timely decisions.展开更多
基金supported by UGC,Maulana Azad National Fellowship for Minority Students,Government of India
文摘Drought tolerance levels and antioxidant protection mechanisms were evaluated for 21 traditional rice varieties of Assam, India, along with Sahbhagi Dhan （drought tolerant） and IR64 （drought sensitive） as controls. Drought was imposed in hydroponic culture with polyethylene glycol 6000 （PEG6000） that was initially standardized with different concentrations. All the rice varieties showed apparent decreases in growth characteristics under drought stress （initially at 15% for 7 d followed by 20% PEG6000 for 7 d in Yoshida medium）. On the basis of standard evaluation score （SES）, eight rice varieties showed high drought tolerance which were carried forward for further biochemical analyses. Based on different morpho- physiological parameters, SN03 （Bora）, SN04 （Prosad Bhog）, SN05 （Kola Joha）, SN06 （Helash Bora）, SN08 （Salihoi Bao）, SN12 （Kola Amona）, SN20 （Ronga Bora） and SN21 （Sok-Bonglong） were identified as promising drought tolerant varieties. The non-enzymatic antioxidants activities viz., glutathione, ascorbate and enzymatic antioxidant activities such as superoxide dismutase （SOD）, catalase （CAT）, guaiacol peroxidase （GPX）, ascorbate peroxidase （APX）, glutathione reductase （GR） in shoots and roots of all the selected varieties revealed significant level of protection mechanisms as compared with controls. Enhancement in activities of the overall antioxidant enzymes including SOD, GPX, CAT, GR and APX under drought stress reflects their role in the adaptation process under water stress.
文摘Assessing soil quality is essential for crop management and soil temporal changes. The present study aims to evaluate soil quality in the Ferralitic soils context countrywide. This assessment was done using multivariate soil quality indice (SQI) models, such as additive quality index (AQI), weighted quality indexes (WQI<sub>add</sub> and WQI<sub>com</sub>) and Nemoro quality index (NQI), applied to two approaches of indicator selection: total data set (TDS) and minimum data set (MDS). Physical and chemical soil indicators were extracted from the ORSTOM’s reports resulting from a sampling campaign in different provinces of Gabon. The TDS approach shows soil quality status according to eleven soil indicators extracted from the analysis of 1,059 samples from arable soil layer (0 - 30 cm depth). The results indicated that 87% of all provinces presented a very low soil quality (Q5) whatever the model. Among soil indicators, exchangeable K<sup>+</sup> and Mg<sup>2+</sup>, bulk density and C/N ratio were retained in MDS, using principal component analysis (PCA). In the MDS approach, 50 to 63% of provinces had low soil quality grades with AQI, WQI<sub>add</sub> and NQI, whereas the total was observed with WQI<sub>com</sub>. Only 25% of provinces had medium soil quality grades with AQI and NQI models, while 12.5% (NQI) and 25% (AQI) presented high quality grades. Robust statistical analyses confirmed the accuracy and validation (0.80 r P ≤ 0.016) of AQI, WQI<sub>add</sub> and NQI into the TDS and MDS approaches. The same sensitivity index value (1.53) was obtained with AQI and WQI<sub>add</sub>. However, WQI<sub>add</sub> was chosen as the best SQI model, according to its high linear regression value (R<sup>2</sup> = 0.82) between TDS and MDS. This study has important implications in decision-making on monitoring, evaluation and sustainable management of Gabonese soils in a pedoclimatic context unfavorable to plant growth.
基金supported by the National Natural Science Foundation of China(General Program,No.82171678)Shenzhen Science and Technology Program(No.JCYJ20230807143504009)Science,Technology and Innovation Commission of Shenzhen Municipality(No.JCYJ20200109140614667).
文摘Objective:To evaluate the diagnostic efficacy and clinical application of the Obstetrical Chinese Disseminated Intravascular Coagulation(DIC)Scoring System(OCDSS).Methods:This study is a retrospective study that collected 1063 cases from Wuhan Union Hospital,Yichang Central People’s Hospital,and the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture between July 2017 and June 2024.These cases were divided into DIC and non-DIC groups based on score standard.Diagnosis of DIC,the rate of hysterectomy,neonatal mortality,and severe asphyxia are the main outcome measures.All the laboratory indicators are all determined by clinical laboratory department of the hospital.Data were expressed as mean±standard deviation or median(interquartile range)and frequencies.Independent sample t-test or non-parametric test were used to compare measurement data,while the chi-square test was used for count data.Receiver operating characteristic(ROC)curve and area under curve(AUC)were used to test the predictive accuracy.Using univariate and multivariate logistic regression analysis to study the high-risk factors.P<0.050 indicates a statistical significance.Results:Of 1063 participants in this study,29 participants(2.73%)were diagnosed with obstetrical DIC by OCDSS score standard,and all the participants were diagnosed as DIC with underlying disease.When the Takao,Clark,and Erez score standard is the“gold standard”,the OCDSS score standard always shows good sensitivity and specificity,with all the AUC over 0.75.OCDSS score standard also has better predictive of hysterectomy(68.18%,91.07%,0.872),severe neonatal asphyxia and death(79.17%,75.07%,0.842)than the other three score standards.All the indicators included in the OCDSS score standard contributed to the DIC diagnosis(all the P<0.001).The indicators in the DIC group were more abnormal than the non-DIC group(all the P<0.001).Conclusion:OCDSS is a first score standard,especially for pregnancies,it considers the underlying disease,clinical symptoms,and laboratory results.This score system shared a good diagnosis performance for DIC in the Chinese population and may help clinicians make timely decisions.
