为探讨水稻叶绿体发育的分子机制,通过对粳稻日本晴进行甲基磺酸乙酯(EMS)诱变,获得一个稳定遗传的叶色白化突变体wrg20(white turn green 20),并对其进行表型鉴定、基因定位和功能分析。与野生型(WT)相比,该突变体于30℃培养时在三叶...为探讨水稻叶绿体发育的分子机制,通过对粳稻日本晴进行甲基磺酸乙酯(EMS)诱变,获得一个稳定遗传的叶色白化突变体wrg20(white turn green 20),并对其进行表型鉴定、基因定位和功能分析。与野生型(WT)相比,该突变体于30℃培养时在三叶期之前完全白化,26℃时突变体白化叶片部分返绿。遗传分析结果表明,该突变性状受单隐性核基因控制。将该突变体与籼稻93-11杂交,构建F2分离群体并进行基因定位,将该基因定位于2号染色体198 kb区间内,通过测序发现LOC_Os02g33610存在由G至A单碱基替换,导致编码的天冬氨酸转化为天冬酰胺,表明该基因可能为OsWRG20的候选基因,与先前所报道的调控叶绿体发育的基因GRY79为等位基因。对该基因进行结构和功能分析,表明OsWRG20可能是调控水稻苗期幼叶生长发育的重要基因。与野生型相比,突变体的叶绿体基因内含子剪接效率降低,由此推断OsWRG20可能通过调控叶绿体RNA的剪接,参与调控水稻苗期叶绿体的发育。本研究结果为苗期水稻叶绿体发育研究提供了新的理论基础。展开更多
在“双一流”建设背景下,高校需要提升科研水平和国际影响力,以更好地服务国家战略需求。然而,如何提升高校国际科研合作仍是一个难题。文章基于InCites数据库和Web of Science(WoS)数据库,对河南省17所“双一流”建设高校2014—2023年...在“双一流”建设背景下,高校需要提升科研水平和国际影响力,以更好地服务国家战略需求。然而,如何提升高校国际科研合作仍是一个难题。文章基于InCites数据库和Web of Science(WoS)数据库,对河南省17所“双一流”建设高校2014—2023年发表的国际合作论文从发文量、合作国家、合作学科、资助机构/计划等角度进行文献计量分析,对河南省“双一流”建设高校的国际科研合作总体态势演变情况进行研究,总结其国际科研合作现状,并提出相关政策建议:加强国际科研合作保障体系建设,建立高水平的国际科研合作研究平台,完善国际合作学科领域,加强科研创新、提高高校教师的科研积极主动意识,为高校进一步加强国际科研合作提供参考和借鉴。展开更多
Reasonable nitrogen(N) application is a promising strategy for reducing crop cadmium(Cd) toxicity. However, the specific form of N and the required amount that affect Cd tolerance and accumulation in rice remain uncle...Reasonable nitrogen(N) application is a promising strategy for reducing crop cadmium(Cd) toxicity. However, the specific form of N and the required amount that affect Cd tolerance and accumulation in rice remain unclear. This study explored the influence of different N-fertilizer forms(NH_(4)NO_(3), NH_4Cl, and KNO_(3)) and dosages on Cd tolerance and uptake in Cd-stressed N-sensitive and N-insensitive indica rice accessions. The results indicated that the Cd tolerance of N-sensitive indica accessions is more robust than that of N-insensitive ones. Furthermore, the shoot Cd content and Cd translocation rate in both N-sensitive and N-insensitive indica accessions decreased with an appropriate supply of NH_(4)NO_(3) and NH_4Cl, whereas they were comparable or slightly increased with increased KNO_(3). Unfortunately, we did not find significant and regular differences in Cd accumulation or translocation between N-sensitive and N-insensitive rice accessions. Consistent with the reduction of shoot Cd content, the addition of NH_(4)NO_(3) and NH_4Cl also inhibited the instantaneous root Cd^(2+) uptake. The expression changes of Cd transport-related genes under different N forms and dosages suggested that the decreased shoot Cd content, caused by the increased supply of NH_(4)NO_(3) and NH_4Cl, is likely achieved by reducing the transcription of OsNRAMP1 and OsIRT1. In summary, our findings reveal that an appropriate supply of NH_(4)NO_(3) and NH_4Cl could reduce Cd uptake and transport in rice seedlings, suggesting that rational N management could reduce the Cd risk in rice production.展开更多
The morphological development of rice(Oryza sativa L.)leaves is closely related to plant architecture,physiological activities,and resistance.However,it is unclear whether there is a co-regulatory relationship between...The morphological development of rice(Oryza sativa L.)leaves is closely related to plant architecture,physiological activities,and resistance.However,it is unclear whether there is a co-regulatory relationship between the morphological development of leaves and adaptation to drought environment.In this study,a drought-sensitive,roll-enhanced,and narrow-leaf mutant(renl1)was induced from a semi-rolled leaf mutant(srl1)by ethyl methane sulfonate(EMS),which was obtained from Nipponbare(NPB)through EMS.Map-based cloning and functional validation showed that RENL1 encodes a cellulose synthase,allelic to NRL1/OsCLSD4.The RENL1 mutation resulted in reduced vascular bundles,vesicular cells,cellulose,and hemicellulose contents in cell walls,diminishing the water-holding capacity of leaves.In addition,the root system of the renl1 mutant was poorly developed and its ability to scavenge reactive oxygen species(ROS)was decreased,leading to an increase in ROS after drought stress.Meanwhile,genetic results showed that RENL1 and SRL1 synergistically regulated cell wall components.Our results revealed a theoretical basis for further elucidating the molecular regulation mechanism of cellulose on rice drought tolerance,and provided a new genetic resource for enhancing the synergistic regulation network of plant type and stress resistance,thereby realizing simultaneous improvement of multiple traits in rice.展开更多
目的:探究氨甲环酸联合碳酸氢钠注射液+林格氏液对创伤失血性休克合并创伤性凝血病患者的影响。方法:选取2022年5月—2023年2月昆明医科大学附属红河医院急诊科收治的67例创伤失血性休克合并创伤性凝血病患者作为研究对象,根据入院时间...目的:探究氨甲环酸联合碳酸氢钠注射液+林格氏液对创伤失血性休克合并创伤性凝血病患者的影响。方法:选取2022年5月—2023年2月昆明医科大学附属红河医院急诊科收治的67例创伤失血性休克合并创伤性凝血病患者作为研究对象,根据入院时间分为两组,2022年5—10月入院的33例纳入对照组,2022年11月—2023年2月入院的34例纳入观察组。两组均给予氨甲环酸和限制性液体复苏,对照组采用醋酸钠林格氏液复苏,观察组采用碳酸氢钠注射液+林格氏液复苏。比较两组氧代谢指标[静脉血氧饱和度(SvO_(2))、氧消耗(VO_(2))和氧输送(DO_(2))]、昏迷程度[格拉斯哥昏迷量表(GCS)]、休克指数、炎症因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-10(IL-10)、白细胞介素-6(IL-6)]、凝血功能[活化部分凝血活酶时间(APTT)、凝血酶时间(TT)、凝血酶原时间(PT)]及并发症。结果:两组复苏前氧代谢指标、昏迷程度、休克指数、炎症因子、凝血功能比较,差异无统计学意义(P>0.05);观察组复苏后2 h SvO_(2)、VO_(2)、DO_(2)水平、GCS评分较对照组更高,休克指数及TNF-α、IL-10、IL-6水平较对照组更低,APTT、TT、PT较对照组更短,差异有统计学意义(P<0.05)。观察组并发症总发生率较对照组更低,差异有统计学意义(P<0.05)。结论:氨甲环酸联合碳酸氢钠注射液+林格氏液可以减轻创伤失血性休克合并创伤性凝血病炎症状态,提高氧代谢,改变凝血功能指标,进而提升复苏效果,减轻昏迷程度,降低相关并发症发生率。展开更多
目的探究院前创伤团队启动(Trauma team activation,TTA)创伤救治模式对严重四肢骨折患者救治及时性及预后。方法选取2020年1月-2022年12月收治的严重四肢骨折患者84例,其中2020年1月-2021年5月为实施TTA模式前共纳入42例作为对照组,202...目的探究院前创伤团队启动(Trauma team activation,TTA)创伤救治模式对严重四肢骨折患者救治及时性及预后。方法选取2020年1月-2022年12月收治的严重四肢骨折患者84例,其中2020年1月-2021年5月为实施TTA模式前共纳入42例作为对照组,2021年6月-2022年12月为实施TTA后共纳入42例作为观察组,对比两组救治及时性指标、肢体功能、并发症以及骨密度指标恢复情况。结果与对照组相比,观察组感染、继发损伤、器官衰竭发生率降低,但对比数据差异不具有统计学意义(P>0.05);与对照组相比,观察组救治及时性指标、专科医生到达时间、特殊检查开始时间、急诊至手术时间、急诊停留时间均明显降低,住院时间明显缩短,差异具有统计学意义(P<0.05);与本组治疗前相比,患者PICP、Total-PINP水平明显升高,β-CTX明显降低,差异具有统计学意义(P<0.05)。与对照组相比,观察组治疗后骨代谢指标PICP、Total-PINP水平明显升高,差异具有统计学意义(P<0.05)。与对照组相比,观察组治疗后骨代谢指标β-CTX水平明显降低,差异具有统计学意义(P<0.05);与本组治疗前相比,患肢功能得分明显升高,差异具有统计学意义(P<0.05)。与对照组相比,观察组治疗后上肢、下肢功能得分明显升高,差异具有统计学意义(P<0.05);与对照组相比,观察组VAS评分、肿胀程度、骨折愈合时间均明显降低,差异具有统计学意义(P<0.05)。结论对于严重四肢骨折患者,开展院前创伤团队启动模式可有效缩短患者急救时间,以保证尽快开展手术治疗,促进患者康复,改善预后。展开更多
文摘为探讨水稻叶绿体发育的分子机制,通过对粳稻日本晴进行甲基磺酸乙酯(EMS)诱变,获得一个稳定遗传的叶色白化突变体wrg20(white turn green 20),并对其进行表型鉴定、基因定位和功能分析。与野生型(WT)相比,该突变体于30℃培养时在三叶期之前完全白化,26℃时突变体白化叶片部分返绿。遗传分析结果表明,该突变性状受单隐性核基因控制。将该突变体与籼稻93-11杂交,构建F2分离群体并进行基因定位,将该基因定位于2号染色体198 kb区间内,通过测序发现LOC_Os02g33610存在由G至A单碱基替换,导致编码的天冬氨酸转化为天冬酰胺,表明该基因可能为OsWRG20的候选基因,与先前所报道的调控叶绿体发育的基因GRY79为等位基因。对该基因进行结构和功能分析,表明OsWRG20可能是调控水稻苗期幼叶生长发育的重要基因。与野生型相比,突变体的叶绿体基因内含子剪接效率降低,由此推断OsWRG20可能通过调控叶绿体RNA的剪接,参与调控水稻苗期叶绿体的发育。本研究结果为苗期水稻叶绿体发育研究提供了新的理论基础。
文摘在“双一流”建设背景下,高校需要提升科研水平和国际影响力,以更好地服务国家战略需求。然而,如何提升高校国际科研合作仍是一个难题。文章基于InCites数据库和Web of Science(WoS)数据库,对河南省17所“双一流”建设高校2014—2023年发表的国际合作论文从发文量、合作国家、合作学科、资助机构/计划等角度进行文献计量分析,对河南省“双一流”建设高校的国际科研合作总体态势演变情况进行研究,总结其国际科研合作现状,并提出相关政策建议:加强国际科研合作保障体系建设,建立高水平的国际科研合作研究平台,完善国际合作学科领域,加强科研创新、提高高校教师的科研积极主动意识,为高校进一步加强国际科研合作提供参考和借鉴。
基金supported by the National Natural Science Foundation of China (Grant No.31971872)the Open Research Fund of State Key Laboratory of Hybrid Rice, China (Grant No.2022KF02)+3 种基金the National Natural Science Foundation of China (Grant Nos.32101755 and 32188102)the Zhejiang Provincial Natural Science Foundation, China (Grant No.LY22C130005)the Key Research and Development Program of Zhejiang Province, China (Grant No.2021C02056)the ‘Pioneer’ and ‘Leading Goose’ R&D Program of Zhejiang, China (Grant No.2023C02014)。
文摘Reasonable nitrogen(N) application is a promising strategy for reducing crop cadmium(Cd) toxicity. However, the specific form of N and the required amount that affect Cd tolerance and accumulation in rice remain unclear. This study explored the influence of different N-fertilizer forms(NH_(4)NO_(3), NH_4Cl, and KNO_(3)) and dosages on Cd tolerance and uptake in Cd-stressed N-sensitive and N-insensitive indica rice accessions. The results indicated that the Cd tolerance of N-sensitive indica accessions is more robust than that of N-insensitive ones. Furthermore, the shoot Cd content and Cd translocation rate in both N-sensitive and N-insensitive indica accessions decreased with an appropriate supply of NH_(4)NO_(3) and NH_4Cl, whereas they were comparable or slightly increased with increased KNO_(3). Unfortunately, we did not find significant and regular differences in Cd accumulation or translocation between N-sensitive and N-insensitive rice accessions. Consistent with the reduction of shoot Cd content, the addition of NH_(4)NO_(3) and NH_4Cl also inhibited the instantaneous root Cd^(2+) uptake. The expression changes of Cd transport-related genes under different N forms and dosages suggested that the decreased shoot Cd content, caused by the increased supply of NH_(4)NO_(3) and NH_4Cl, is likely achieved by reducing the transcription of OsNRAMP1 and OsIRT1. In summary, our findings reveal that an appropriate supply of NH_(4)NO_(3) and NH_4Cl could reduce Cd uptake and transport in rice seedlings, suggesting that rational N management could reduce the Cd risk in rice production.
基金supported by the Nanfan Special Project of Chinese Academy of Agricultural Sciences (Grant No. ZDXM2315)the National Natural Science Foundation of China (Grant Nos. 32372125, 31861143006, and 32188102)+2 种基金Special Support Program of Chinese Academy of Agricultural Sciences (Grant NO. NKYCLJ-C-2021-015)Specific Research Fund of the Innovation Platform for Academicians of Hainan Province2023 College Student Innovation and Entrepreneurship Project of Jiangxi Agricultural University, China (Grant No. S202310410095)
文摘The morphological development of rice(Oryza sativa L.)leaves is closely related to plant architecture,physiological activities,and resistance.However,it is unclear whether there is a co-regulatory relationship between the morphological development of leaves and adaptation to drought environment.In this study,a drought-sensitive,roll-enhanced,and narrow-leaf mutant(renl1)was induced from a semi-rolled leaf mutant(srl1)by ethyl methane sulfonate(EMS),which was obtained from Nipponbare(NPB)through EMS.Map-based cloning and functional validation showed that RENL1 encodes a cellulose synthase,allelic to NRL1/OsCLSD4.The RENL1 mutation resulted in reduced vascular bundles,vesicular cells,cellulose,and hemicellulose contents in cell walls,diminishing the water-holding capacity of leaves.In addition,the root system of the renl1 mutant was poorly developed and its ability to scavenge reactive oxygen species(ROS)was decreased,leading to an increase in ROS after drought stress.Meanwhile,genetic results showed that RENL1 and SRL1 synergistically regulated cell wall components.Our results revealed a theoretical basis for further elucidating the molecular regulation mechanism of cellulose on rice drought tolerance,and provided a new genetic resource for enhancing the synergistic regulation network of plant type and stress resistance,thereby realizing simultaneous improvement of multiple traits in rice.
文摘目的:探究氨甲环酸联合碳酸氢钠注射液+林格氏液对创伤失血性休克合并创伤性凝血病患者的影响。方法:选取2022年5月—2023年2月昆明医科大学附属红河医院急诊科收治的67例创伤失血性休克合并创伤性凝血病患者作为研究对象,根据入院时间分为两组,2022年5—10月入院的33例纳入对照组,2022年11月—2023年2月入院的34例纳入观察组。两组均给予氨甲环酸和限制性液体复苏,对照组采用醋酸钠林格氏液复苏,观察组采用碳酸氢钠注射液+林格氏液复苏。比较两组氧代谢指标[静脉血氧饱和度(SvO_(2))、氧消耗(VO_(2))和氧输送(DO_(2))]、昏迷程度[格拉斯哥昏迷量表(GCS)]、休克指数、炎症因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-10(IL-10)、白细胞介素-6(IL-6)]、凝血功能[活化部分凝血活酶时间(APTT)、凝血酶时间(TT)、凝血酶原时间(PT)]及并发症。结果:两组复苏前氧代谢指标、昏迷程度、休克指数、炎症因子、凝血功能比较,差异无统计学意义(P>0.05);观察组复苏后2 h SvO_(2)、VO_(2)、DO_(2)水平、GCS评分较对照组更高,休克指数及TNF-α、IL-10、IL-6水平较对照组更低,APTT、TT、PT较对照组更短,差异有统计学意义(P<0.05)。观察组并发症总发生率较对照组更低,差异有统计学意义(P<0.05)。结论:氨甲环酸联合碳酸氢钠注射液+林格氏液可以减轻创伤失血性休克合并创伤性凝血病炎症状态,提高氧代谢,改变凝血功能指标,进而提升复苏效果,减轻昏迷程度,降低相关并发症发生率。
文摘目的探究院前创伤团队启动(Trauma team activation,TTA)创伤救治模式对严重四肢骨折患者救治及时性及预后。方法选取2020年1月-2022年12月收治的严重四肢骨折患者84例,其中2020年1月-2021年5月为实施TTA模式前共纳入42例作为对照组,2021年6月-2022年12月为实施TTA后共纳入42例作为观察组,对比两组救治及时性指标、肢体功能、并发症以及骨密度指标恢复情况。结果与对照组相比,观察组感染、继发损伤、器官衰竭发生率降低,但对比数据差异不具有统计学意义(P>0.05);与对照组相比,观察组救治及时性指标、专科医生到达时间、特殊检查开始时间、急诊至手术时间、急诊停留时间均明显降低,住院时间明显缩短,差异具有统计学意义(P<0.05);与本组治疗前相比,患者PICP、Total-PINP水平明显升高,β-CTX明显降低,差异具有统计学意义(P<0.05)。与对照组相比,观察组治疗后骨代谢指标PICP、Total-PINP水平明显升高,差异具有统计学意义(P<0.05)。与对照组相比,观察组治疗后骨代谢指标β-CTX水平明显降低,差异具有统计学意义(P<0.05);与本组治疗前相比,患肢功能得分明显升高,差异具有统计学意义(P<0.05)。与对照组相比,观察组治疗后上肢、下肢功能得分明显升高,差异具有统计学意义(P<0.05);与对照组相比,观察组VAS评分、肿胀程度、骨折愈合时间均明显降低,差异具有统计学意义(P<0.05)。结论对于严重四肢骨折患者,开展院前创伤团队启动模式可有效缩短患者急救时间,以保证尽快开展手术治疗,促进患者康复,改善预后。