Calcium(Ca)is essential for plant growth and stress adaptation,yet its availability is often limited in acidic soils,posing a major threat to crop production.Understanding the intricate mechanisms orchestrating plant ...Calcium(Ca)is essential for plant growth and stress adaptation,yet its availability is often limited in acidic soils,posing a major threat to crop production.Understanding the intricate mechanisms orchestrating plant adaptation to Ca deficiency remains elusive.Here,we show that the Ca deficiency-enhanced nuclear accumulation of the transcription factor SENSITIVE TO PROTON RHIZOTOXICITY 1(STOP1)in Arabidopsis thaliana confers tolerance to Ca deprivation,with the global transcriptional responses triggered by Ca deprivation largely impaired in the stop1 mutant.Notably,STOP1 activates the Ca deprivation-induced expression of CATION/Ca^(2+)EXCHANGER 1(CCX1)by directly binding to its promoter region,which facilitates Ca^(2+)efflux from endoplasmic reticulum to cytosol to maintain Ca homeostasis.Consequently,the constitutive expression of CCX1 in the stop1 mutant partially rescues the Ca deficiency phenotype by increasing Ca content in the shoots.These findings uncover the pivotal role of the STOP1-CCX1 axis in plant adaptation to low Ca,offering alternative manipulating strategies to improve plant Ca nutrition in acidic soils and extending our understanding of the multifaceted role of STOP1.展开更多
A fast approach was described for the synthesis of water-dispersible monodisperse dopamine-coated Fe304 nanoparticles （DA- Fe304） with uniform size and shape via ligand-exchange of oleic acid on Fe304 using only 2 m...A fast approach was described for the synthesis of water-dispersible monodisperse dopamine-coated Fe304 nanoparticles （DA- Fe304） with uniform size and shape via ligand-exchange of oleic acid on Fe304 using only 2 min. The prepared DA-Fe304 nanoparticles were characterized by transmission electron microscopy, Fourier transform infrared spectrometry, and vibrating sample magnetometer. The results indicated that the resulting DA-Fe304 nanoparticles had an average diameter of about 19.2 nm. The magnetic saturation value of the prepared DA-Fe304 nanoparticles was determined to be 72.87 emu/g, which indicating a well- established superparamagnetic property.展开更多
In this paper, we consider the partially nonlinear errors-in-variables models when the non- parametric component is measured with additive error. The profile nonlinear least squares estimator of unknown parameter and ...In this paper, we consider the partially nonlinear errors-in-variables models when the non- parametric component is measured with additive error. The profile nonlinear least squares estimator of unknown parameter and the estimator of nonparametric component are constructed, and their asymptotic properties are derived under general assumptions. Finite sample performances of the proposed statistical inference procedures are illustrated by Monte Carlo simulation studies.展开更多
基金supported by National Natural Science Foundation of China(32201702)Central Public-interest Scientific Institution Basal Research Fund(No.Y2023QC21)+3 种基金Natural Science Foundation of Zhejiang Province(LY23C130005)National Key Research and Development Program of China(2023YFD1901800,2023YFD1902905)the Agricultural Science and Technology Innovation Program(ASTIP)the Postdoctoral Fellowship Program of CPSF(Grant No.GZC20232327)to J.Y.
文摘Calcium(Ca)is essential for plant growth and stress adaptation,yet its availability is often limited in acidic soils,posing a major threat to crop production.Understanding the intricate mechanisms orchestrating plant adaptation to Ca deficiency remains elusive.Here,we show that the Ca deficiency-enhanced nuclear accumulation of the transcription factor SENSITIVE TO PROTON RHIZOTOXICITY 1(STOP1)in Arabidopsis thaliana confers tolerance to Ca deprivation,with the global transcriptional responses triggered by Ca deprivation largely impaired in the stop1 mutant.Notably,STOP1 activates the Ca deprivation-induced expression of CATION/Ca^(2+)EXCHANGER 1(CCX1)by directly binding to its promoter region,which facilitates Ca^(2+)efflux from endoplasmic reticulum to cytosol to maintain Ca homeostasis.Consequently,the constitutive expression of CCX1 in the stop1 mutant partially rescues the Ca deficiency phenotype by increasing Ca content in the shoots.These findings uncover the pivotal role of the STOP1-CCX1 axis in plant adaptation to low Ca,offering alternative manipulating strategies to improve plant Ca nutrition in acidic soils and extending our understanding of the multifaceted role of STOP1.
基金supported by the National Natural Science Foundation of China(No.50903011)the Fundamental Research Funds for the Central Universities(No.11NZYQN23)+1 种基金the Talents Introduction Foundation of Southwest University for Nationalities(No.2010RC06)the Open Fund(No.PLN1112)of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University,SWPU)
文摘A fast approach was described for the synthesis of water-dispersible monodisperse dopamine-coated Fe304 nanoparticles （DA- Fe304） with uniform size and shape via ligand-exchange of oleic acid on Fe304 using only 2 min. The prepared DA-Fe304 nanoparticles were characterized by transmission electron microscopy, Fourier transform infrared spectrometry, and vibrating sample magnetometer. The results indicated that the resulting DA-Fe304 nanoparticles had an average diameter of about 19.2 nm. The magnetic saturation value of the prepared DA-Fe304 nanoparticles was determined to be 72.87 emu/g, which indicating a well- established superparamagnetic property.
基金Supported by National Natural Science Foundation of China(Grant Nos.11101014 and 11002005)the Beijing Natural Science Foundation(Grant No.1142002)+2 种基金the Doctoral Fund of Innovation of Beijing Universityof Technologythe Science and Technology Project of Beijing Municipal Education Commission(Grant No.KM201410005010)the Training Programme Foundation for the Beijing Municipal Excellent Talents(GrantNo.2013D005007000005)
文摘In this paper, we consider the partially nonlinear errors-in-variables models when the non- parametric component is measured with additive error. The profile nonlinear least squares estimator of unknown parameter and the estimator of nonparametric component are constructed, and their asymptotic properties are derived under general assumptions. Finite sample performances of the proposed statistical inference procedures are illustrated by Monte Carlo simulation studies.
