Isopentenyltransferase(IPT)genes,including those encoding ATP/ADP-IPTs and tRNA-IPTs,control the rate-limiting steps of the biosynthesis of N6-(Δ2-isopentenyl)adenine(iP)-type and trans-zeatin(tZ)-type cytokinins and...Isopentenyltransferase(IPT)genes,including those encoding ATP/ADP-IPTs and tRNA-IPTs,control the rate-limiting steps of the biosynthesis of N6-(Δ2-isopentenyl)adenine(iP)-type and trans-zeatin(tZ)-type cytokinins and cis-zeatin(cZ)-type cytokinins,respectively.However,the evolution and roles of these IPTs in angiosperms are not well understood.Here,we report comprehensive analyses of the origins,evolution,expression patterns,and possible roles of ATP/ADP-IPTs and tRNA-IPTs in angiosperms.We found that Class I and II tRNA-IPTs likely coexisted in the last common ancestor of eukaryotes,while ATP/ADP-IPTs likely originated from a Class II tRNA-IPT before the divergence of angiosperms.tRNA-IPTs are conservatively retained as 2–3 copies,but ATP/ADP-IPTs exhibit considerable expansion and diversification.Additionally,tRNA-IPTs are constitutively expressed throughout the plant,whereas the expression of ATP/ADP-IPTs is tissue-specific and rapidly downregulated by abiotic stresses.Furthermore,previous studies and our present study indicate that ATP/ADP-IPTs and their products,iPs/tZs,may regulate responses to environmental stresses and organ development in angiosperms.We therefore hypothesize that tRNA-IPTs and the associated cZs play a housekeeping role,whereas ATP/ADP-IPTs and the associated iP/tZ-type cytokinins play regulatory roles in organ development and stress responses in angiosperms,which echoes the conclusions and hypothesis presented in the accompanying study by Wang,X.et al Evolution and roles of cytokinin genes in angiosperms 2:Do ancient CKXs play housekeeping roles while non-ancient CKXs play regulatory roles?Hortic Res https://doi.org/10.1038/s41438-020-0246-z.展开更多
Background: Malaria in pregnancy is a preventable public health concern leading to a high prevalence of maternal morbidity, maternal mortality and adverse birth outcomes. Intermittent Preventive Treatment during pregn...Background: Malaria in pregnancy is a preventable public health concern leading to a high prevalence of maternal morbidity, maternal mortality and adverse birth outcomes. Intermittent Preventive Treatment during pregnancy using Sulfadoxine-Pyrimethamine (IPTp-SP) is one of the main strategies used to prevent malaria in pregnancy. This study was aimed to determine knowledge attitude and practice regarding intermittent preventive treatment IPT of malaria in pregnancy utilization among pregnant women attending antenatal center in benadir hospital wadajir district benadir region somalia during the period of the study from April 2021-July 2021. Methods: The study was descriptive cross-sectional retrospective Hospital based. The sample size was 60 respondents of pregnant women at 20 weeks to 36 weeks of gestation. Data were collected by interview method using structured questionnaire. The data were collected and then entered to Statistical Package for Social Science version 20 for analysis. Results: The study displayed that the majority of the respondents (58%) were in the 25 - 34 years’ age group. A total of 51 (85%) were married, while 17 (28%) had primary school education. 43 (72%) were housewives while only 11 (18%) were employed. A total 32 (53%) were had gravid more than Four times, while the study showed that, the majority of mothers 39 (65%) were had knowledge about Intermittent Preventive Treatment during pregnancy using Sulfadoxine-Pyrimethamine (IPTp-SP). The study showed that majority of the respondent 25 (42%) were getting health education awareness towards IPTp were from health care providers at health centers while 8 (13%) from Friends/relatives/neighbors, followed by 4 (6%) from their husband. And 34 (57%) were had convenience IPTp-SP tablet consumption at their current pregnancy while 26 (43%) did not. Conclusion and Recommendations: Inclusion there was good knowledge and positive attitude towards IPT despite poor utilization, the study recommended the ministry of health especially health promotion, maternal and reproductive health and national malaria control programe should intensify strategies and policies to ensure 3 doses of IPTp-SP given at antenatal care centers target coverage in Somalia and provide capacity building for all health care providers. Also, there should be continuous sensitization of pregnant women on the importance of intermittent preventive treatment during each pregnancy by healthcare workers.展开更多
基金Yi Li holds a no pay visiting professor position at Nanjing Agricultural University.
文摘Isopentenyltransferase(IPT)genes,including those encoding ATP/ADP-IPTs and tRNA-IPTs,control the rate-limiting steps of the biosynthesis of N6-(Δ2-isopentenyl)adenine(iP)-type and trans-zeatin(tZ)-type cytokinins and cis-zeatin(cZ)-type cytokinins,respectively.However,the evolution and roles of these IPTs in angiosperms are not well understood.Here,we report comprehensive analyses of the origins,evolution,expression patterns,and possible roles of ATP/ADP-IPTs and tRNA-IPTs in angiosperms.We found that Class I and II tRNA-IPTs likely coexisted in the last common ancestor of eukaryotes,while ATP/ADP-IPTs likely originated from a Class II tRNA-IPT before the divergence of angiosperms.tRNA-IPTs are conservatively retained as 2–3 copies,but ATP/ADP-IPTs exhibit considerable expansion and diversification.Additionally,tRNA-IPTs are constitutively expressed throughout the plant,whereas the expression of ATP/ADP-IPTs is tissue-specific and rapidly downregulated by abiotic stresses.Furthermore,previous studies and our present study indicate that ATP/ADP-IPTs and their products,iPs/tZs,may regulate responses to environmental stresses and organ development in angiosperms.We therefore hypothesize that tRNA-IPTs and the associated cZs play a housekeeping role,whereas ATP/ADP-IPTs and the associated iP/tZ-type cytokinins play regulatory roles in organ development and stress responses in angiosperms,which echoes the conclusions and hypothesis presented in the accompanying study by Wang,X.et al Evolution and roles of cytokinin genes in angiosperms 2:Do ancient CKXs play housekeeping roles while non-ancient CKXs play regulatory roles?Hortic Res https://doi.org/10.1038/s41438-020-0246-z.
文摘Background: Malaria in pregnancy is a preventable public health concern leading to a high prevalence of maternal morbidity, maternal mortality and adverse birth outcomes. Intermittent Preventive Treatment during pregnancy using Sulfadoxine-Pyrimethamine (IPTp-SP) is one of the main strategies used to prevent malaria in pregnancy. This study was aimed to determine knowledge attitude and practice regarding intermittent preventive treatment IPT of malaria in pregnancy utilization among pregnant women attending antenatal center in benadir hospital wadajir district benadir region somalia during the period of the study from April 2021-July 2021. Methods: The study was descriptive cross-sectional retrospective Hospital based. The sample size was 60 respondents of pregnant women at 20 weeks to 36 weeks of gestation. Data were collected by interview method using structured questionnaire. The data were collected and then entered to Statistical Package for Social Science version 20 for analysis. Results: The study displayed that the majority of the respondents (58%) were in the 25 - 34 years’ age group. A total of 51 (85%) were married, while 17 (28%) had primary school education. 43 (72%) were housewives while only 11 (18%) were employed. A total 32 (53%) were had gravid more than Four times, while the study showed that, the majority of mothers 39 (65%) were had knowledge about Intermittent Preventive Treatment during pregnancy using Sulfadoxine-Pyrimethamine (IPTp-SP). The study showed that majority of the respondent 25 (42%) were getting health education awareness towards IPTp were from health care providers at health centers while 8 (13%) from Friends/relatives/neighbors, followed by 4 (6%) from their husband. And 34 (57%) were had convenience IPTp-SP tablet consumption at their current pregnancy while 26 (43%) did not. Conclusion and Recommendations: Inclusion there was good knowledge and positive attitude towards IPT despite poor utilization, the study recommended the ministry of health especially health promotion, maternal and reproductive health and national malaria control programe should intensify strategies and policies to ensure 3 doses of IPTp-SP given at antenatal care centers target coverage in Somalia and provide capacity building for all health care providers. Also, there should be continuous sensitization of pregnant women on the importance of intermittent preventive treatment during each pregnancy by healthcare workers.
