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OsNPF3.1,a nitrate,abscisic acid and gibberellin transporter gene,is essential for rice tillering and nitrogen utilization efficiency

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Journal of Integrative Agriculture 2024年第4期23卷 1087-1104页

作者： Junnan Hang Bowen Wu Diyang Qiu Guo Yang Zhongming Fang Mingyong Zhang Institute of Rice Industry Technology Research/Key Laboratory of Functional Agriculture Guizhou Provincial Department of Education/Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous RegionMinistry of Education/Key Laboratory of Molecular Breeding for Grain and Oil Crops in Guizhou Province/College of Agricultural SciencesGuizhou UniversityGuiyang 550025China Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement/Guangdong Provincial Key Laboratory of Applied Botany/South China Botanical Garden Chinese Academy of SciencesGuangzhou 510650China Institute of Fruit Tree Research Guangdong Academy of Agricultural SciencesGuangzhou 510640China

Low-affinity nitrate transporter genes have been identified in subfamilies 4-8 of the rice nitrate transporter 1(NRT1)/peptide transporter family(NPF),but the OsNPF3 subfamily responsible for nitrate and phytohormone transport and rice growth and development remains *** this study,we described OsNPF3.1 as an essential nitrate and phytohormone transporter gene for rice tillering and nitrogen utilization efficiency(NUtE).OsNPF3.1 possesses four major haplotypes of its promoter sequence in 517 cultivars,and its expression is positively associated with tiller *** expression was higher in the basal part,culm,and leaf blade than in other parts of the plant,and was strongly induced by nitrate,abscisic acid(ABA)and gibberellin 3(GA_3)in the root and shoot of *** experiments demonstrated that OsNPF3.1 is a pH-dependent low-affinity nitrate transporter,with rice protoplast uptake assays showing it to be an ABA and GA_3 ***3.1 overexpression significantly promoted ABA accumulation in the roots and GA accumulation in the basal part of the plant which inhibited axillary bud outgrowth and rice tillering,especially at high nitrate *** NUtE of OsNPF3.1-overexpressing plants was enhanced under low and medium nitrate concentrations,whereas the NUtE of OsNPF3.1 clustered regularly interspaced short palindromic repeats(CRISPR)plants was increased under high nitrate *** results indicate that OsNPF3.1 transports nitrate and phytohormones in different rice tissues under different nitrate *** altered OsNPF3.1 expression improves NUtE in the OsNPF3.1-overexpressing and CRISPR lines at low and high nitrate concentrations,respectively.

关键词： rice tillering grain yield phytohormone nitrate transporter nitrogen utilization efficiency

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Function, transport, and regulation of amino acids: What is missing in rice?

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The Crop Journal 2021年第3期9卷 530-542页

作者： Nan Guo Shunan Zhang MingjiGu Guohua Xu Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding College of Horticulture and Plant ProtectionYangzhou UniversityYangzhou 225009JiangsuChina State Key Laboratory of Crop Genetics and Germplasm Enhancement MOA Key Laboratory of Plant Nutrition and Fertilization in Lower-Middle Reaches of the Yangtze RiverNanjing Agricultural UniversityNanjing 210095JiangsuChina

Amino acids are essential plant compounds serving as the building blocks of proteins,the predominant forms of nitrogen(N)distribution,and signaling *** amino acids derive from root acquisition,nitrate reduction,and ammonium *** amino acid transporters(AATs)mediating transfer processes of amino acids have been functionally characterized in Arabidopsis,whereas the function and regulation of the vast majority of AATs in rice(Oryza sativa L.)and other crops remain *** this review,we summarize the current understanding of amino acids in the rhizosphere and in *** describe their function as signal molecules and in regulating plant architecture,flowering time,and defense against abiotic stress and pathogen *** not only function in root acquisition and translocation of amino acids from source to sink organs,regulating N uptake and use efficiency,but also as transporters of non-amino acid substrates or as amino acid *** AAT genes show natural variations in their promoter and coding regions that are associated with altered uptake rate of amino acids,grain N content,and tiller *** of an amino acid transfer model in plants will advance the manipulation of AATs for improving rice architecture,grain yield and quality,and N-use efficiency.

关键词： Amino acids Amino acid transporter Grain quality nitrogen uptake efficiency nitrogen utilization efficiency Rice architecture

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Responses of photosynthetic characteristics and enzyme activity of nitrogen metabolism to low nitrogen in maize with different nitrogen tolerance

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International Journal of Agricultural and Biological Engineering 2020年第6期13卷 133-143页

作者： Pengtao Ji Yongwei Cui Xiangling Li Kai Xiao Peijun Tao Yuechen Zhang College of Agronomy Hebei Agricultural University/State Key Laboratory of North China Crop Improvement and RegulationBaoding 071001HebeiChina Academy of Agricultural Planning and Engineering Ministry of Agriculture and Rural AffairsBeijing 100125China College of Agronomy and Biotechnology Hebei Normal University of Science&TechnologyQinhuangdao 066004HebeiChina

Understanding the physiological processes associated with leaf photosynthetic characteristics and nitrogen(N)assimilation during grain-filling stage are helpful for enhancing nitrogen utilization efficiency(NUtE)of *** this study,the leaf photosynthetic and N assimilation parameters in maize,including Zhengdan 958(ZD958),a low-N tolerance cultivar and Huanong 138(HN138),a low-N sensitive cultivar under different N rates were *** showed that ZD958 displayed significant increases on grain yield and NUtE than that in *** on the leaf photosynthetic and N assimilation-associated processes indicated that ZD958 had higher leaf N remobilization(Rem N),net photosynthetic rate(Pn)and photosynthetic N use efficiency(PNUE)with respect to those of HN138 during grain-filling *** addition,ZD958 was also shown to be higher activities of leaf nitrate reductase(NR),glutamine synthetase(GS),nitrate reductase(GDH)and glutamine synthetase(GAGOT)than those of *** leaf PNUE was significantly positively correlated with NR,GS,GDH,GOGAT suggesting that leaf PNUE and NR,GS,GDH,GOGAT jointly determined the N remobilization efficiency and the leaf N remobilization during *** results suggested that ZD958 possessed improved PNUE,NR and GS activities in leaves during grain-filling stage that contributes improve grain weights and yield formation capacities upon under low-N conditions.

关键词： low-N photosynthesis nitrogen assimilation nitrogen utilization efficiency maize

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Methods on Identification and Screening of Rice Genotypes with High nitrogen efficiency

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Rice science 2011年第2期18卷 127-135页

作者： CHENG Jian-feng JIANG Han-yan LIU Yi-bai DAI Ting-bo CAO Wei-xing Key Laboratory of Crop Physiology Ecology and Genetic Breeding Ministry of Education Jiangxi Agricultural University Nanchang 330045 China Key Laboratory of Crop Growth Regulation Ministry of Agriculture Nanjing Agricultural University Nanjing 210095 China

In order to establish methods for indentification and screening of rice genotypes with high nitrogen （N） efficiency, N absorption efficiency （NAE）, N utilization efficiency （NUE） and N harvest index （NHI） in ten rice genotypes were investgated at the elongation, booting, heading and maturity stages under six N levels in a pot experiment with soil-sand mixtures at various ratios. NAE in various rice genotypes firstly increased, peaked under a medium nitrogen rate of 0.177 g/kg and then decreased, but NUE and NHI always decreased with increasing nitrogen levels. NAE in various rice genotypes ever increased with growing process and NUE indicated a descending tendency of elongation stage〉heading stage〉maturity stage〉booting stage. N level influenced rice NAE, NUE and NHI most, followed by genotype, and the both effects were significant at 0.01 level. In addition, the interaction effects of genotype and nitrogen level on rice NAE and NUE were significant at 0.01 level, but not significant on rice NHI. Because the maximum differences of NAE and NUE were found at the elongation stage, it was thought to be the most suitable stage for identification and screening these two paremeters. Therefore, the optimum conditions for identification and screening of rice NAE, NUE and NHI in a pot experiment were the nitrogen rate of 0.157 g/kg at the elongation stage, low nitrogen at the elongation stage, and the nitrogen rate of 0.277 g/kg at the maturity stage, respectively.

关键词： rice genotype identification screening high nitrogen efficiency nitrogen absorption efficiency nitrogen utilization efficiency nitrogen harvest index

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Effects of nitrogen on N Uptake,Grain Yield and Quality of Medium-Gluten Wheat Yangmai 10

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Agricultural Sciences in China 2005年第6期4卷 421-428页

作者： ZHUXin-kai GUOWen-shan ZHOUZheng-quan FENGChao-nian PENGYing-xin LINQi-hong JiangsuProvincialKeyLabofCropGeneticsandPhysiology YangzhouUniversityYangzhou225009P.R.China／／WheatResearchInstituteYangzhouUniversityYangzhou225009P.R.China JiangsuProvincialKeyLabofCropGeneticsandPhysiology YangzhouUniversityYangzhou225009P.R.China

The effects of the basal and top-dressing nitrogen (N) on N uptake and translocation, N utilization efficiency, grain yieldand quality of medium-gluten winter wheat Yangmai 10 were studied from 2000 to 2002. The main results were as *** content and nitrogen accumulation in plant at maturity increased with the amount of N application. Grain proteincontent and wet gluten content were significantly correlated with applied N. There was a significantly positive correlationbetween nitrogen accumulation before anthesis (NBA) and basal N fertilizer, and between nitrogen accumulation afteranthesis (NAA) and top-dressing N. N accumulated in grains was significantly correlated to NBA, NAA and N translocationfrom vegetative organs after anthesis (NTVA). NBA was significantly correlated with N application, but NAA and NTVAhad a quadratic curve correlation with applied N. N fertilizer use efficiency (NUE) had a quadratic curve correlation withapplied N, and the NUE was high when basal and top-dressing N was equally applied. For the medium-gluten wheatYangmai 10 under the same N application ratio, there was a N-regulating effect when the N application was less than266.55 kg ha-1, a stagnation of yield and quality when N application ranged from 266.55 to 309.08 kg ha-1, and an excessiveN application when the N application rate was greater than 309.08 kg ha-1. Under the conditions of this experiment, theprecise N application is 220-270 kg ha-1 with basal and top-dressing N equally used when a grain yield of more than 6 750kg ha-1, protein content higher than 12%, wet gluten content more than 30% and NUE greater than 40% could be obtained.

关键词： Medium-gluten wheat Yangmai 10 Grain yield Grain quality nitrogen utilization efficiency

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