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Grain Yield,Biomass Accumulation,and Leaf Photosynthetic Characteristics of Rice under Combined Salinity-Drought Stress

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Rice science 2024年第1期31卷 118-128,I0023页

作者： WEI Huanhe GENG Xiaoyu ZHANG Xiang ZHU Wang ZHANG Xubin CHEN Yinglong HUO Zhongyang ZHOU Guisheng MENG Tianyao DAI Qigen jiangsu key laboratory of crop Cultivation and physiology/jiangsu key laboratory of crop genetics and physiology/jiangsu Co-Innovation Center for Modern Production Technology of Grain crops/key laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas the Ministry of Agriculture and Rural Affairs of China/Research Institute of Rice Industrial Engineering TechnologyYangzhou UniversityYangzhou 225009China Institute of Agricultural Science and Technology Development/Joint International Research laboratory of Agriculture and Agri-Product Safety the Ministry of Education of ChinaYangzhou UniversityYangzhou 225009China

Simultaneous stresses of salinity and drought often coincide during rice-growing seasons in saline lands,primarily due to insufficient water resources and inadequate irrigation ***,combined salinity-drought stress poses a major threat to rice *** this study,two salinity levels(NS,non-salinity;HS,high salinity)along with three drought treatments(CC,control condition;DJ,drought stress imposed at jointing;DH,drought stress imposed at heading)were performed to investigate their combined influences on leaf photosynthetic characteristics,biomass accumulation,and rice yield ***,drought,and their combination led to a shortened growth period from heading to maturity,resulting in a reduced overall growth *** yield was reduced under both salinity and drought stress,with a more substantial reduction under the combined salinity-drought *** combined stress imposed at heading caused greater yield losses in rice compared with the stress imposed at ***,the combined salinity-drought stress induced greater decreases in shoot biomass accumulation from heading to maturity,as well as in shoot biomass and nonstructural carbohydrate(NSC)content in the stem at heading and ***,it increased the harvest index and NSC remobilization *** and drought reduced the leaf area index and SPAD value of flag leaves and weakened the leaf photosynthetic characteristics as indicated by lower photosynthetic rates,transpiration rates,and stomatal *** reductions were more pronounced under the combined ***,drought,and especially their combination,decreased the activities of ascorbate peroxidase,catalase,and superoxide dismutase,while increasing the contents of malondialdehyde,hydrogen peroxide,and superoxide *** results indicated a more significant yield loss in rice when subjected to combined salinity-drought *** individual and combined stresses of salinity and dro

关键词： antioxidant defense system combined salinity-drought stress drought stress photosynthetic characteristics rice salinity stress

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Salinity Stress Deteriorates Grain Yield and Increases 2-Acetyl-1-Pyrroline Content in Rice

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Rice science 2024年第4期31卷 371-374,I0015-I0021页

作者： WEI Huanhe MA Weiyi ZHANG Xiang ZUO Boyuan GENG Xiaoyu WANG Lulu ZHU Wang CHEN Yinglong HUO Zhongyang XU Ke MENG Tianyao DAI Qigen jiangsu key laboratory of crop Cultivation and physiology/jiangsu key laboratory of crop genetics and physiology/jiangsu Co-Innovation Center for Modern Production Technology of Grain crops/key laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas the Ministry of Agriculture and Rural Affairs of China/East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice/Research Institute of Rice Industrial Engineering TechnologyYangzhou UniversityYangzhou 225009China Institutes of Agricultural Science and Technology Development/Joint International Research laboratory of Agriculture and Agri-Product Safety the Ministry of Education of ChinaYangzhou UniversityYangzhou 225009China

Salinity stress greatly impacts rice grain yield and quality, as well as the 2-acetyl-1-pyrroline(2-AP) content in grains. The present study was conducted with Nanjing 9108(NJ9108, conventional japonica rice) and Wenliangyou 669(WLY669, indica hybrid rice) in the fields with non-salinity(NS), low salinity(LS), and high salinity(HS) stresses in 2021 and 2022.

关键词： salinity Yield erior

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Multi-genome evolutionary study of the ABC1 gene family and identification of the pleiotropic effects of OsABC1-13 in rice development

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The crop Journal 2024年第4期12卷 1022-1030页

作者： Fuying Ma Mingyu Liu Peiwen Yan Shicong He Jian Hu Xinwei Zhang Fuan Niu Jinhao Cui Xinyu Yuan Xiaoyun Xin Liming Cao Jinshui Yang Ying Wang Xiaojin Luo State key laboratory of Genetic Engineering and Engineering Research Center of Gene Technology(Ministry of Education) School of Life SciencesFudan UniversityShanghai 200433China Ministry of Education key laboratory for Biodiversity Science and Ecological Engineering Department of Ecology and Evolutionary BiologySchool of Life SciencesFudan UniversityShanghai 200433China Institute of crop Breeding and Cultivation Shanghai Academy of Agricultural SciencesShanghai 200241China Ministry of Education Key Laboratory of Crop PhysiologyEcology and Genetic Breeding College of AgronomyJiangxi Agricultural UniversityNanchang 330045JiangxiChina

In four rice genomes,85 ABC1-family genes were identified by comparative genomics,evolution,genetics,and ***,OsABC1-13,was shown by knockdown and knockout experiments to affect plant height,grain size,and photosynthet... 详细信息

关键词： Multi-genome analysis Activity of bc1 complex gene Photosynthesis Biomass Osabc1-13 Haplotype

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Haplotype-based phylogenetic analysis and population genomics uncover the origin and domestication of sweetpotato

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Molecular Plant 2024年第2期17卷 277-296页

作者： Mengxiao Yan Ming Li Yunze Wang Xinyi Wang M-Hossein Moeinzadeh Dora G.Quispe-Huamanquispe Weijuan Fan Yijie Fang Yuqin Wang Haozhen Nie Zhangying Wang Aiko Tanaka Bettina Heider Jan F.Kreuze Godelieve Gheysen Hongxia Wang Martin Vingron Ralph Bock Jun Yang Shanghai key laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Botanical GardenShanghai 201602China College of Life Sciences Chongqing Normal UniversityChongqing 401331China Biotechnology and Nuclear Technology Research Institute Sichuan Academy of Agricultural SciencesChengdu 610061China College of Life Sciences Shanghai Normal UniversityShanghai 200234China department of Computational Molecular Biology Max Planck Institute for Molecular GeneticsIhnestraBe 63-7314195 BerlinGermany department of Biotechnology Ghent University9000 GhentBelgium Guangdong provincial key laboratory of crops genetics and Improvement Crop Research InstituteGuangdong Academy of Agricultural SciencesGuangzhou 510640China Graduate School of Bioagricultural Sciences Nagoya UniversityChikusaNagoya 464-8601Japan international Potato Center(CIP) LimaPeru CAS Center for Excellence of Molecular Plant Sciences Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200233China Max-Planck-Institut fur Molekulare Pflanzenphysiologie Am Muhlenberg 114476 Potsdam-GolmGermany

The hexaploid sweetpotato(lpomoea batatas)is one of the most important root crops ***,its genetic origin remains controversial,and its domestication history remains *** this study,we used a range of genetic evidence and a newly developed haplotype-based phylogenetic analysis to identify two probable progenitors of *** diploid progenitor was likely closely related to lpomoea ae-quatoriensis and contributed the B,subgenome,IbT-DNA2,and the lineage 1 type of chloroplast genome to *** tetraploid progenitor of sweetpotato was most likely *** 4x,which donated the B2 subgenome,IbT-DNA1,and the lineage 2 type of chloroplast *** most likely originated from reciprocal crosses between the diploid and tetraploid progenitors,followed by a subsequent whole-genome *** addition,we detected biased gene exchanges between the subgenomes;the rate of B,to B2 subgenome conversions was nearly three times higher than that of B2 to B subgenome *** analyses revealed that genes involved in storage root formation,maintenance of genome stabil-ity,biotic resistance,sugar transport,and potassium uptake were selected during the speciation and domestication of *** study sheds light on the evolution of sweetpotato and paves the way forimprovementofthiscrop.

关键词： sweetpotato origin gene conversion domestication IbT-DNA HPA

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The removal of nitrate reductase phosphorylation enhances tolerance to ammonium nitrogen deficiency in rice

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Journal of Integrative Agriculture 2022年第3期21卷 631-643页

作者： HAN Rui-cai XU Zhi-rong LI Chen-yan Adnan RASHEED PAN Xiao-hua SHI Qing-hua WU Zi-ming key laboratory of crop physiology Ecology and Genetic BreedingMinistry of Education/College of AgronomyJiangxi Agricultural UniversityNanchang 330045P.R.China Rice Research Institute Jiangxi Academyof Agricultural Sciences/Jiangxi Provincial Key Laboratory for Physiology and Genetics of RiceNanchang 330200P.R.China

Nitrate reductase(NR) is a key enzyme for nitrogen assimilation in plants,and its activity is regulated by posttranslational *** investigate the effects of dephosphorylation of the NIA1 protein on the growth and the physiological and biochemical characteristics of rice under different forms of nitrogen supplies,the phenotypes,nitrogen metabolism and reactive oxygen metabolism were measured in NIA1 phosphorylation site-directed mutant lines(S532 D and S532 A),an Os Nia1 over-expression line(OE) and Kitaake(wild type,WT).Compared with WT and OE,S532 D and S532 A have stronger nitrogen assimilation *** ammonium nitrate served as the nitrogen source,the plant heights,dry weights of shoots and chlorophyll(Chl) contents of S532 D and S532 A were lower than those of the WT and OE,whereas hydrogen peroxide(H_(2)O_(2)),malondialdehyde(MDA) and nitrite contents were *** potassium nitrate served as the nitrogen source,the plant heights,dry weights of shoots and Chl contents of S532 D and S532 A were higher than those of the WT and OE,there were no significant differences in the contents of H_(2)O_(2) and MDA in the leaves of the test materials,and the difference in nitrite contents among different lines *** ammonium sulfate served as the nitrogen source,there were no significant differences in the physiological indexes of the test materials,except NR *** with ammonium nitrate and ammonium sulfate,the content of NH_(4)^(+)-N in the leaves of each plant was lower when potassium nitrate was used as the nitrogen *** q PCR results showed that Os GS and Os NGS1 were negatively regulated by downstream metabolites,and Os Nrt2.2 was induced by *** summary,when ammonium nitrate served as the nitrogen source,the weak growth of NIA1 phosphorylation site-directed mutant lines was due to the toxicity caused by the excessive accumulation of *** potassium nitrate served as the nitrogen source,the assimilation r

关键词： Oryza sativa L. nitrate reductase phosphorylation NR activity nitrogen utilization nitrite

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Reducing phosphorylation of nitrate reductase improves nitrate assimilation in rice

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Journal of Integrative Agriculture 2022年第1期21卷 15-25页

作者： HAN Rui-cai LI Chen-yan Adnan RASHEED PAN Xiao-hua SHI Qing-hua WU Zi-ming key laboratory of crop physiology Ecology and Genetic BreedingMinistry of Education/College of AgronomyJiangxi Agricultural UniversityNanchang 330045P.R.China Rice Research Institute Jiangxi Academy of Agricultural Sciences/Jiangxi Provincial Key Laboratory for Physiology and Genetics of RiceNanchang 330200P.R.China

Nitrate reductase(NR) is an important enzyme for nitrate assimilation in plants, and post-translational phosphorylation regulates NR activity. To evaluate the impact of the dephosphorylation of nitrate reductase 1(NIA1) protein on NR activity,nitrogen metabolism and plant growth, NIA1 phosphorylation site directed mutant lines(S532 D and S532 A) and an OsNia1 over-expression line(OE) were constructed, and the phenotype, NIA1 protein and its phosphorylation level, NR activity,nitrate metabolism and reactive oxygen metabolism of the transgenic lines were analysed. Exogenous NIA1 protein was not phosphorylated in S532 D and S532 A mutant lines, and their NR activities, activity states of NR and assimilation efficiencies of NO3–-N were higher than those in Kitaake(WT) and OE. The changes in these physiological and biochemical indexes in the OE line were less than in S532 D and S532 A compared to WT. These results suggest that the removal of transcriptional level control had little effect on nitrogen metabolism, but the removal of post-translational modification had a profound effect on it. With the removal of NIA1 phosphorylation and the improvement in the nitrate assimilation efficiency, the plant height and chlorophyll content of S532 D and S532 A decreased and the hydrogen peroxide and malondialdehyde contents of rice seedlings increased, which may be related to the excessive accumulation of nitrite as an intermediate metabolite. These results indicated that the phosphorylation of NR may be a self-protection mechanism of rice. The reduced phosphorylation level of nitrate reductase improved the assimilation of nitrate, and the increased phosphorylation level reduced the accumulation of nitrite and prevented the toxic effects of reactive oxygen species in rice.

关键词： rice(Oryza sativa L.) nitrate reductase phosphorylation directed mutation nitrogen metabolism

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A new statistical method for mapping QTLs underlying endosperm traits

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Chinese Science Bulletin 2005年第14期50卷 1470-1476页

作者： HU Zhiqiu XU Chenwu jiangsu provincial key Lab of crop genetics and physiology Depart-ment of Agronomy Yangzhou University Yangzhou 225009 China

Genetic expression for an endosperm trait in seeds of cereal crops may be controlled simultaneously by the triploid endosperm genotypes and the diploid maternal genotypes. However, current statistical methods for mapping quantitative trait loci (QTLs) underlying endosperm traits have not been effective in dealing with the putative maternal genetic effects. Combining the quantitative genetic model for diploid maternal traits with triploid endosperm traits, here we propose a new statistical method for mapping QTLs con- trolling endosperm traits with maternal genetic effects. This method applies the data set of both DNA molecular marker genotypes of each plant in segregation population and the quantitative observations of single endosperms in each plant to map QTL. The maximum likelihood method implemented via the expectation-maximization algorithm was used to the estimate parameters of a putative QTL. Since this method involves the maternal effect that may contribute to en- dosperm traits, it might be more congruent with the genetics of endosperm traits and more helpful to increasing the preci- sion of QTL mapping. The simulation results show the pro- posed method provides accurate estimates of the QTL effects and locations with high statistical power.

关键词：胚乳特性遗传因子遗传模型染色体

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Nuclear translocation of OsMADS25 facilitated by OsNAR2.1 in reponse to nitrate signals promotes rice root growth by targeting OsMADS27 and OsARF7

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Plant Communications 2023年第6期4卷 329-341页

作者： Junyu Wu Shuaiqi Yang Nana Chen Qining Jiang Linli Huang Jiaxuan Qi Guohua Xu Lisha Shen Hao Yu Xiaorong Fan Yinbo Gan Zhejiang key laboratory of crop Germplasm Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310000China State key laboratory of crop genetics and Germplasm Enhancement Nanjing Agricultural UniversityNanjing 210095China Temasek Life Sciences laboratory and department of Biological Sciences National University of Singapore1 Research LinkSingapore 117604Singapore

Nitrate is an important nitrogen source and signaling molecule that regulates plant growth and *** several components of the nitrate signaling pathway have been identified,the detailed mechanisms are still *** previous results showed that OsMADS25 can regulate root development in response to nitrate signals,but the mechanism is still ***,we try to answer two key questions:how does OsMADS25 move from the cytoplasm to the nucleus,and what are the direct target genes activated by OsMADS25 to regulate root growth after it moves to the nucleus in response to nitrate?Our results demonstrated that OsMADS25 moves from the cytoplasm to the nucleus in the presence of nitrate in an *** immunoprecipitation sequencing,chromatin immunoprecipitation qPCR,yeast one-hybrid,and luciferase experiments showed that OsMADS25 directly activates the expression of OsMADS27 and OsARF7,which are reported to be associated with root ***,OsMADS25-RNAi lines,the Osnar2.1 mutant,and OsMADS25-RNAi Osnar2.1 lines exhibited significantly reduced root growth compared with the wild type in response to nitrate supply,and expression of OsMADS27 and OsARF7 was significantly suppressed in these ***,these results reveal a new mechanismby which OsMADS25 interacts with *** interaction is required for nuclear accumulation of OsMADS25,which promotes OsMADS27 and OsARF7 expression and root growth in a nitratedependent manner.

关键词： OsMADS25 OsNAR2.1 OsMADS27 OsARF7 nitrate signaling rice root

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An overview on biochar production, its implications, and mechanisms of biochar-induced amelioration of soil and plant characteristics

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Pedosphere 2022年第1期32卷 107-130页

作者： Fasih Ullah HAIDER Jeffrey ACOULTER Liqun CAI Saddam HUSSAIN Sardar Alam CHEEMA Jun WU Renzhi ZHANG College of Resources and Environmental Sciences Gansu Agricultural UniversityLanzhou 730070China Gansu provincial key Lab of Arid-land crop Science Gansu Agricultural UniversityLanzhou 730070China department of agronomy and Plant genetics University of MinnesotaSt.PaulMN 55108USA department of agronomy University of Agriculture FaisalabadFaisalabad 38040Pakistan

The degradation of soil fertility and quality due to rapid industrialization and human activities has stimulated interest in the rehabilitation of low-fertility soils to sustainably improve crop yield. In this regard, biochar has emerged as an effective multi-beneficial additive that can be used as a medium for the amelioration of soil properties and plant growth. The current review highlights the methods and conditions for biochar production and the effects of pyrolysis temperature, feedstock type, and retention time on the physicochemical properties of biochar. We also discuss the impact of biochar as a soil amendment with respect to enhancing soil physical (e.g., surface area, porosity, ion exchange, and water-holding capacity) and chemical (e.g., pH, nutrient exchange,functional groups, and carbon sequestration) properties, improving the soil microbiome for increased plant nutrient uptake and growth, reducing greenhouse gas emissions, minimizing infectious diseases in plants, and facilitating the remediation of heavy metal-contaminated soils. The possible mechanisms for biochar-induced amelioration of soil and plant characteristics are also described, and we consider the challenges associated with biochar utilization. The findings discussed in this review support the feasibility of expending the application of biochar to improve degraded soils in industrial and saline-alkali regions, thereby increasing the usable amount of cultivated soil. Future research should include long-term field experiments and studies on biochar production and environmental risk management to optimize biochar performance for specific soil remediation purposes.

关键词： carbon sequestration crop yield pyrolysis soil amendment soil fertility soil remediation

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Identification of microRNAs regulating grain filling of rice inferior spikelets in response to moderate soil drying post-anthesis

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The crop Journal 2022年第4期10卷 962-971页

作者： Zhenning Teng Yinke Chen Youqing Yuan Yaqiong Peng Yake Yi Huihui Yu Zhenxie Yi Jianchang Yang Yan Peng Meijuan Duan Jianhua Zhang Nenghui Ye College of Agriculture Hunan Agricultural UniversityChangsha 410128HunanChina Hunan provincial key laboratory of Rice Stress Biology Hunan Agricultural UniversityChangsha 410128HunanChina Changjun High School of Changsha Changsha 410128HunanChina key laboratory of crop genetics and physiology of jiangsu Province Yangzhou UniversityYangzhou 225009JiangsuChina department of Biology Hong Kong Baptist UniversityKowloon 999077Hong KongChina School of Life Sciences and State key laboratory of Agrobiotechnology the Chinese University of Hong KongShatin 999077Hong KongChina

The grain filling of inferior spikelets is much less complete than that of superior spikelets in rice cultivars with large panicles and numerous spikelets and is promoted by moderate soil drying(MD)post-anthesis.A growing body of evidence has shown that microRNAs function in regulating grain ***,little is known about the mechanism of microRNA control of grain filling of inferior spikelets in response to *** this study,grain filling of inferior spikelets was promoted by MD treatment in ***-RNA profiling at the most active grain-filling stage was conducted in inferior spikelets under control(CK)and MD *** 521 known and 128 novel miRNAs,38 known and 9 novel miRNAs were differentially expressed between the CK and MD *** genes of differentially expressed miRNAs were involved in multiple developmental and signaling pathways associated with catalytic activity,carbohydrate metabolism,and other *** miR1861 and miR397 were upregulated by MD,leading to a decrease in OsSBDCP1 and OsLAC,two negative regulators of SSIIIa activity and BR signaling,*** contrast,miR1432 abundance was reduced by MD,resulting in upregulation of OsACOT and thus an elevated content of both ABA and *** results suggest that both starch synthesis and phytohormone biosynthesis are regulated by differentially expressed miRNAs in inferior spikelets in response to MD *** results suggest the molecular mechanisms by which miRNAs regulate grain filling in inferior spikelets of rice under moderate soil drying,providing potential application in agriculture to increase rice yields by genetic approaches.

关键词： Moderate soil drying Grain filling Inferior spikelet MicroRNA Rice

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