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Knocking-Out OsPDR7 Triggers Up-Regulation of OsZIP9 Expression and Enhances Zinc accumulation in Rice

Rice science 2023年第1期30卷 36-49页

作者： MENG Lu TANG Mingfeng ZHU Yuxing TAN Longtao Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China University of Chinese Academy of Sciences Beijing 100049China Institute of Agricultural Quality Standard and Testing Technology Chongqing Academy of Agricultural SciencesChongqing 401329China

Zinc(Zn) is an essential trace mineral that is required for plant growth and development. A number of protein transporters, which are involved in Zn uptake, translocation and distribution, are finely regulated to maintain Zn homeostasis in plant. In this study, we functionally characterized an ATP-binding cassette(ABC) transporter gene, OsPDR7, which is involved in Zn homeostasis. Os PDR7 encodes a plasma membrane-localized protein that is expressed mainly in the exodermis and xylem in the rice ***7 mutants resulted in higher Zn accumulation compared with the wild type. Heterogeneous expression of OsPDR7 in a yeast mutant rescued the Zn-deficiency phenotype, implying transport activity of OsPDR7 to Zn in yeast. However, no ZIP genes except for OsZIP9 showed change in expression profile in the ospdr7 mutants, which suggested that OsPDR7 maintains cellular Zn homeostasis through regulating Os ZIP9 expression. RNA-Seq analysis further revealed a set of differentially expressed genes between the wild type and ospdr7 mutants that allowed us to propose a possible OsPDR7-associated signaling network involving transporters, hormone responsive genes, and transcription factors. Our results revealed a novel transporter involved in the regulation of Zn homeostasis and will pave the way toward a better understanding of the fine-tuning of gene expression in the network of transporter genes.

关键词： OsPDR7 OsZIP9 zinc metal accumulation rice ATP-binding cassette transporter

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Amelioration of acidic soil using fy Ash for Mine Revegetation in PostMining Land

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International Journal of Coal Science & Technology 2022年第3期9卷 201-206页

作者： Akihiro Hamanaka Takashi Sasaoka Hideki Shimada Shinji Matsumoto Department of Earth Resources Engineering Faculty of EngineeringKyushu University819-0395 FukuokaJapan Geological Survey of Japan National Institute of Advanced Industrial Science and Technology(AIST)305-8567 TsukubaJapan

This paper described the use of fy ash for soil amelioration of acidic soils to promote plant *** mining sites,acid sulfate soils/rocks,which contain sulfde minerals(*** FeS_(2)),have appeared as a result of overburden *** excessively acidic condition inhibits plant growth due to the dissolution of harmful elements,such as Al,Fe,and *** ash,an alkaline byproduct of coal combustion generated in thermal power plants is expected to be adopted to ameliorate acidic ***,the mixing ratio of fy ash must be considered because excessive addition of fy ash can have a negative impact on plant growth due to its physical/chemical *** pot trials using Acacia mangium demonstrate the evolution of plant growth with a 5%–10%addition of fy ash into acidic *** the acidic soil has a high potential for metal dissolution,the metal ions leached from the acidic soil are large,making it difcult to improve plant growth due to osmotic and ionic *** work suggests that the efects of fy ash on metal ions leached from the soil have to be considered for the amelioration of acidic soil.

关键词： Acid Soil Coal Ash metal accumulation Plant Growth

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A comparative study of Epipactis atrorubens in two different forest communities of the Middle Urals, Russia

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Journal of Forestry Research 2020年第6期31卷 2111-2120页

作者： Elena Filimonova Natalia Lukina Margarita Glazyrina Galina Borisova Tripti Adarsh Kumar Maria Maleva Laboratory of Anthropogenic Dynamics of Ecosystems Ural Federal UniversityEkaterinburgRussia 620002 Department of Experimental Biology and Biotechnology Ural Federal UniversityEkaterinburgRussia 620002

The objective of this study was to compare ecophysiological and morphological parameters of a regionally endangered orchid species,Epipactis atrorubens(*** Bernh.)Bess.,growing in two forest communities(on serpentine and granite outcrops)of the Middle Urals,***,dominance,and phytocoenosis studies showed the colonization of a wide range of plant species on both *** physicochemical properties of the soil,chemical composition and morphological features of ***,growing under technogenic conditions(asbestos deposits),on serpentine outcrops and in the natural environment of the granite massif were studied for the first *** serpentine substrate differed from the granite one by its greater stoniness,circumneutral pH and lower contents of available nitrogen and *** high concentrations of magnesium were found in the serpentine soil,some 79 times higher than in the granite *** concentrations of nickel(94 times),chromium(59 times),cobalt(17 times),and iron(4 times)were found in the serpentine substrate,higher than in the granite *** differences between the sites for available metal contents and for root and shoot metal contents were significantly *** of most of the metals in the roots were higher than in the *** higher metal concentrations and lower nitrogen and phosphorus levels in serpentine soils,*** had a larger population and greater viability compared to those growing on *** on serpentine outcrops were characterized by the formation of a larger number of fruits,greater root lengths and thicker leaf blades,compared to plants on *** well-developed orchid mycorrhizae contributed to the survival of this species under unfavorable serpentine ***,serpentine outcrops formed due to the mining of asbestos could be a suitable substrate for the light-demanding *** due to its capacity to adapt to dry,rocky,nutrient-depleted soils a

关键词： Orchids Forest phytocoenosis Serpentine Granite metal accumulation

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Heavy metals Phytoremediation and Its Impact on Photosynthetic Pigments and Metabolic Content in Some Plant Species Grown in the Streets of Jeddah Governorate, Saudi Arabia

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Journal of Environmental Protection 2022年第7期13卷 557-574页

作者： Marwa Alharbi Ghalia Aljeddani Department of Biology Collage of Science University of Jeddah Jeddah Saudi Arabia

In Jeddah governorate, increased industrialization, urbanization and vehicular traffic may raise levels of heavy metals in the air and soil, threatening food safety and human health. Roadside vegetation traffic barriers might be an effective way to enhance roadside air quality and reduce human exposure to vehicular pollution. This study was conducted in order to uncover the best-cultivated plant species for purifying polluted air in terms of environmental parameters. The samples for this study were obtained from several locations throughout Jeddah governorate streets. The main causes of air pollution in the study area are traffic and automobile emissions. Photosynthetic pigments, soluble sugars, soluble protein, amino acids, and proline in plant extracts were investigated in the plant species used in this study. Also, the ionic composition (K, Na Ca and Mg), as well as the heavy metals (Zn, Cr, Ni, Cd, Pb, Co and Ba) in the sampling sites, as well as roots and leaves of the collected plant samples were all assessed. Plant examination revealed that I. coccinea possessed the highest value of Chl b, amino acid, prolin, soluble proteins and sugars, while T. stans exhibited the highest amount of Chl a, carotenoids. Furthermore, the most common contaminants in all sites were Zn, Ba, and Ni, with Zn and Ba being the most actively accumulated in the leaves of the studied plants. The findings revealed that the root of C. lancifolius is a powerful phytoaccumulator of Zn, Ni, and Co. In addition, C. lancifolius , I. coccinea , Z. spina-christi , and B. spectabilis were shown to exhibit high accumulating potential of various polluting metals in their roots. Also, Zn, Ba, Ni, and Cr were the most efficiently transmitted metals to the leaves of the studied plants. Consequently, these plant species can be employed in phytoremediation approaches at contaminated sites.

关键词： Air Pollution Phytoremediation Street Trees Metabolic Content metal accumulation

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Effects of cadmium and copper on sialic acid levels in blood and brain tissues of Cyprinus carpio L.

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Journal of Coastal Life Medicine 2014年第9期 673-678页

作者： Utku Güner Elvan Bakar Trakya University Faculty of ScienceDepartment of BiologyBalkan CampusEdirneTurkey Trakya University Faculty of PharmacyBalkan CampusEdirneTurkey

Objective:To investigate the effects of cadmium(Cd)and copper(Cu)on sialic acid levels of brain and blood tissues of Cyprinus ***:Adult carps were exposed to 0.1,0.5 mg/L Cu,0.1,0.5 and 1.0 mg/L Cd and 0.1 mg/L Cu+0.1 mg/L Cd under static experiment conditions for 1 *** the end of exposure period,heavy metal accumulations and sialic acid levels in blood and brain tissues of the test animals were ***:Cu and Cd accumulated in tissues in a dramatically increasing dose-dependent *** acids level of the fish exposed to 0.1,0.5 and 1.0 mg/L Cu and Cd and control grups for 1 week were 0.834,1.427,0.672,0.934,2.968,4.714 mg/mL *** results also showed that Cu has an antagonistic effect on tissue sialic acid ***:We propose that Cd and Cu make a complex with sialic acids of membranes in the tissues *** complex between metal ions and sialic acid migth account for the cellular toxicity based on Cu and Cd.

关键词： Carp Cyprinus carpio Copper Cadmium Sialic acid Blood Brain metal accumulation

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