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Regulation of different light conditions for efficient biomass production and protein accumulation of Spirulina platensis

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Journal of Oceanology and Limnology 2024年第1期42卷 174-186页

作者： Yufei ZHANG Xianjun LI Yuhui LI Shiqi LIU Yanrui CHEN Miao JIA Xin WANG Lu ZHANG Qiping GAO Liang ZHANG Daoyong YU Baosheng GE State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology China University of Petroleum(East China)Qingdao 266580China Tongwei Co. Ltd.Healthy Aquaculture Key Laboratory of Sichuan ProvinceChengdu 610093China

Light plays an important role in the photosynthesis and metabolic process of microalgae.However,how different light conditions regulate the biomass production and protein accumulation of microalgae is mostly unknown.In this study,the influence of different light conditions,including light colors,densities,and light:dark cycles on the cell growth and biochemical composition of Spirulina platensis was symmetrically characterized.Under different colored lights,S.platensis all shows an increase trend within the increased light intensity ranges;however,each showing different optimal light intensities.At the same light intensity,different colored lights show different growth rate of S.platensis following the sequence of red>white>green>yellow>blue.The maximum growth rate and protein accumulation were determined as 21.88 and 5.10 mg/(L·d)when illuminated under red LED.The energy efficiency of different light sources was calculated and ranked as red>white>blue≈green>yellow.Transcriptomic analysis suggests that red light can promote cell growth and protein accumulation by upregulating genes related to photosynthesis,carbon fixation,and C-N metabolism pathways.This study provides a conducive and efficient way to promote biomass production and protein accumulation of S.platensis by regulating light conditions.

关键词： microalgae light emitting diode protein accumulation biomass production transcriptomic analysis

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accumulation Characteristics of protein and Non-protein Components and Their Correlations with protein Concentration in Rice Grains

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Phyton-International Journal of Experimental Botany 2021年第4期90卷 1285-1292页

作者： Xiaoli Zhang Xiaohong Yin Jiana Chen Fangbo Cao Yu Liu Zhengwu Xiao Liqin Hu Guanghui Chen Tianfeng Liang Min Huang Rice Research Institute Guangxi Academy of Agricultural SciencesNanning530007China Guangxi Key Laboratory of Rice Genetics and Breeding Nanning530007China Crop and Environment Research Center for Human Health College of AgronomyHunan Agricultural UniversityChangsha410128China

protein in rice grains is an important source of nutrition for rice consumers.This study mainly aimed to identify the critical factors that determine grain protein concentration in rice.accumulation parameters,including mean accumulation rate(Rmean)and active accumulation duration(Dactive),for protein and non-protein components and their correlations with protein concentration in rice grains were investigated in field experiments conducted over two years with six rice cultivars.Results showed that grain protein concentration ranged from 9.6%to 11.9%across cultivars and years.accumulation processes of protein and non-protein components were well fitted by the logistic equation for all six rice cultivars in both years,and the ratio of protein to non-protein for R_(mean) and D_(active) ranged from 0.08 to 0.12 and 1.01 to 1.33,respectively.Grain protein concentration was significantly correlated with protein to non-protein ratio for R_(mean).This study suggests that grain protein concentration is not solely determined by the accumulation of protein or non-protein component,but by the coordination of protein and non-protein accumulation.

关键词： Grain protein concentration logistic regression non-protein accumulation protein accumulation rice

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Proteomic Analysis through Adventitious Rooting of Pinus radiata Stem Cuttings with Different Rooting Capabilities

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American Journal of Plant Sciences 2016年第14期7卷 1888-1904页

作者： Carolina Álvarez Luis Valledor Patricia Sáez Manuel Sánchez-Olate Darcy Ríos Centro Tecnológico de la Planta Forestal (CTPF) Instituto Forestal (INFOR) Sede Bío-Bío Chile Laboratorio de Cultivo de Tejidos Vegetales Facultad de Ciencias Forestales y Centro de Biotecnología Universidad de Concepción Concepción Chile Laboratories of Adaption Biotechnologies Global Change Research Centre Academy of Sciences of the Czech Republic Brno Czech Republic Plant Physiology Epiphysage Research Group B.O.S. Department Faculty of Biology University of Oviedo Oviedo Spain

In forest production systems, vegetative propagation of elite clones through adventitious rooting is a common practice. In Chile, adventitious rooting is the main methodology for vegetative reproduction of Pinus radiata. However, the capability of produce adventitious roots in gymnosperms decreases with aging. While it is true that some efforts have been made to identify markers or/and regulators of the aging process and adventitious rooting, molecular mechanisms that regulate both processes are scarcely known, especially at protein level. This research evaluated qualitative and quantitative changes in protein accumulation during the adventitious rooting process of P. radiata stem cuttings, with different rooting capabilities. Beside, an analysis of morpho-anatomical changes was performed in stem cuttings with high and low rooting capabilities, during the adventitious rooting process. It was observed that juvenile 1-year-old stem cuttings rooted in a 100%, while aged stem cuttings (3-year-old) presented only a 20% of rooting. According to the results of differential protein accumulation, univariate and multivariate analysis indicated that in total, 114 and 89 proteins were differentially accumulated in juvenile and aged cuttings, respectively. Also, identification of such proteins showed the presence of proteins related to cell wall organization and the presence of a protein related with proper distribution of auxin PIN transporter, both key in the new meristem formation process during adventitious rooting.

关键词： Pinus radiata Adventitious Rooting protein accumulation Aging

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Effects of exogenous abscisic acid and gibberellic acid on filling process and nitrogen etabolism haracteristics in wheat grains

Effects of exogenous abscisic acid and gibberellic acid on f...

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第十五次中国小麦栽培科学学术研讨会

作者： Weibing Yang,Yingli Ni,Tie Cai,Yanping Yin,Zhenlin Wang~* 1 National Key Laboratory of Crop Biology,Ministry of Science and Technology,Agronomy College of Shandong Agricultural University,Tai’an 271018,Shandong,P.R.China.

Hormones play important roles in regulating the grain filling process and protein accumulation.In this study,two wheat cultivars differing in grain protein concentration were used to investigate the changes in endogenous hormones contents and the mechanism of hormonal regulation of grain filling and protein accumulation under exogenous application of abscisic acid(ABA) or gibberellic acid(GA3).Results showed that the mean grain weight of the ABA treatment was 11.8%and 5%higher than that of control in Shannong1391(SN1391) and Gaocheng8901(GC8901),respectively.The equivalent values for SN1391 and GC8901 were 16.9%and 6.9%after GA was applied.The protein concentration was significantly increased by 17.6%and 15.3%in response to application of ABA in SN1391 and GC8901,respectively,and by 21.2%and 12.0%responding to GA. GA3 showed much higher effects than ABA on glutamine synthetase(GS) activity and free amino acid content.The elevated contents of endogenous ABA and gibberellins(GA) were closely associated with the application of ABA and GA3,respectively.The indole-3-acetic acid(IAA) contents reduced at the early grain filling period under the application of ABA,but it increased responding to exogenous ABA and GA at the mid and later grain filling period.The correlation analysis demonstrated that grain filling rate positively and significantly correlated with contents of GA and LAA and ABA,free amino acid content and GS activity significantly correlated both with the contents of ABA and GA,and soluble protein content significantly correlated with contents of ABA and LAA.It can be concluded that the effects of exogenous hormones were predominantly mediated by changes in endogenous hormone contents,which affected grain filling process,nitrogen metabolism characteristics,and,therefore,changed protein accumulation amounts.

关键词： protein accumulation Grain filling Hormone contents Nitrogen metabolism characteristics

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