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Combining ectomycorrhizal fungi and plant growth-promoting rhizobacteria to enhance salt tolerance of Metasequoia glyptostroboides

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林业研究:英文版 2023年第5期34卷 1603-1614页

作者： Weiliang Kong Xiuqian Xu Zhenqian Li Yahui Wang Xiaoqin Wu Co-Innovation Centre for Sustainable Forestry in Southern China College of ForestryNanjing Forestry UniversityNanjing 210037People’s Republic of China Jiangsu Key Laboratory for Prevention and Management of Invasive Species Nanjing Forestry UniversityNanjing 210037People’s Republic of China

plant growth and productivity are negatively affected by soil salinity.This study investigated the effects of the rhizosphere-promoting bacterium,Bacillus paramycoides JYZ-SD5,and the ectomycorrhizal fungus,Schizophyllum commune Be,on the growth of Metasequoia glyptostroboides under salt stress.Changes in biomass,root growth,root ion distribution and in vivo enzyme activities were determined under different treatments(Be,JYZ-SD5,and Be+JYZ-SD5).The results show that all inoculations increased chlorophyll content,shoot length and root diameter with or without salt stress,and the effect of Be+JYZ-SD5was the strongest.JYZ-SD5 and Be+JYZ-SD5 treatments significantly increased root length,surface area,bifurcation number,tip number,main root length and diameter under salt stress.Normal chloroplast structures developed under both single and double inoculations.Relative to the control,root activities of M.glyptostroboides in the Be,JYZSD5,and Be+JYZ-SD5 treatments increased by 31.3%,17.2%,and 33.7%.All treatments increased the activities of superoxide dismutase(SOD),peroxidase(POD),Na^(+)-K^(+)-ATPase and Ca^(2+)-Mg^(2+)-ATPase.The strongest effect was by Be+JYZ-SD5.Analysis of root ion distribution showed that,under salt stress,Na^(+)and K^(+)decreased and were concentrated in the epidermis or cortex.Na/K ratios also decreased.The Be+JYZ-SD5 treatment increased betaine by 130.3%and 97.9%under 50 mM and 100 mM salt stress,respectively.Together,these changes result in the activation of physiological and biochemical processes involved in the mitigation of salinity-induced stress in M.glyptostroboides.

关键词： Bacillus paramycoides Schizophyllum commune Metasequoia glyptostroboides Salt stress plant growth

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Hydrochar-embedded carboxymethyl cellulose-g-poly(acrylic acid)hydrogel as stable soil water retention and nutrient release agent for plant growth

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Journal of Bioresources and Bioproducts 2022年第2期7卷 34-45页

作者： Yufei Zhang Xinyue Tian Qiuyue Zhang Huifang Xie Bingyu Wang Yanfang Feng Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and EnvironmentJiangsu Academy of Agricultural SciencesNanjing 210014China

The cellulose-based hydrogel has been widely applied for soil water retention and nutrient re-lease agents for several decades.Embedding the inorganic materials into hydrogels is an excellent strategy to improve the inherent limits of the cellulose-based hydrogel.Notably,municipal sludge-derived hydrochar(HC)has reduced the environmental burden and offered a potential hydrogel carrier to control water-retention and nutrient-release.However,the above function for plant growth of hydrochar-embedded carboxymethyl cellulose-g-poly(acrylic acid)(CMC-g-PAA/HC)is unknown,and relevant reports are lacking.This study investigated the water retention,nutri-ent release behavior,and effect of germination and plant growth of CMC-g-PAA/HC hydrogel.Characterization results showed that HC was successfully incorporated into CMC-g-PAA/HC with 6.0%higher thermostability,7.2-21.0%lower swelling ratio(SR)in water,and substantial SR in phosphate solution(P-solution).The water loss rate of CMC-g-PAA/HC in P-solution or wa-ter owned a more significant temperature response(7.9-15.0 folds)than CMC-g-PAA(8.2-10.0 folds).Moreover,4.0%higher n value and more 18.5%released P for CMC-g-PAA/HC were also observed.These phenomena were due to restricting the polymer chains movement and the wa-ter molecules diffusion inside the hydrogels with HC.Phytotoxicity assessments showed that HC in CMC-g-PAA/HC could effectively alleviate the inhibition effects on rape germination retained with 78.3%germination vigor and 80.0%germination ratio,even dramatically improved plant growth to 28 d.The results of this study demonstrated a new route for developing eco-friendly CMC-g-PAA/HC hydrogel,advantageous as a water retention agent and nutrient carrier in arid and semiarid regions.

关键词： Hydrogel Hydrochar Stable phosphorus-release Water retention plant growth

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Effect of Dandelion(Taraxacum mongolicum Hand.-Mazz.)Intercropping with Different plant Spacing on Blight and growth of Pepper(Capsicum annuum L.)

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Phyton-International Journal of Experimental Botany 2023年第8期92卷 2227-2244页

作者： Peixin Li Hanbing Liu Yingtong Chen Xin Zhang Ning Cao Ying Sun Meimei Jia Mengran Wu Xuejiao Tong Xinmei Jiang Xihong Yu Yao Cheng College of Horticulture and Landscape Architecture Northeast Agricultural UniversityHarbin150030China Key Laboratory of Biology and Genetic Improvement of Horticulture Crops(Northeast Region) Ministry of Agriculture and Rural AffairsHarbinChina State Key Laboratory of Improvement and Utilization of Saline-Alkali Soils(Inland Saline-Alkali Land of Northeast China) Ministry of Agriculture and Rural Affairs of ChinaJilin Agricultural UniversityJilinChina

Intercropping of crops that can secrete bacteriostatic active substances can not only inhibit the occurrence of disease but also have an important effect on plant growth.However,the effects of dandelion intercropping on pepper blight control and pepper growth remain unclear.In this study,the control effect of dandelion on pepper blight was studied by inoculating the pepper leaves with Phytophthora infestans,and it also discusses the correlation of the occurrence of pepper epidemic disease with the pepper canopy environment,soil environment,pepper photo-synthesis,and yield index.The results showed that best plant distance for dandelion intercropping was 20 cm(P20),and the control effect reached 43.31%.As compared to the CK,SOD enzyme,POD enzyme,and PAL enzyme were signiﬁcantly up-regulated during the growth of pepper;chlorophyll content in pepper leaves was signiﬁcantly increased;photosynthetic characteristics were signiﬁcantly increased;stem diameter and yield of crop pepper were effectively improved;and the quality of the pepper product was better,but intercropping dandelion resulted in a signiﬁcant decrease of nutrients in the soil environment of pepper,so a reasonable intercropping distance was needed.The correlation analysis shows that the incidence of pepper blight(A)was signiﬁcantly positively correlated with soil temperature(Q),intercellular carbon dioxide(L),and canopy air temperature(O).The incidence of capsicum blight(A)was signiﬁcantly negatively correlated with chlorophyll content(F),net photo-synthetic rate(K),stomatal conductance(M),ww rate(N),soil sucrase activity(W),vitamin C(AB),and leaf PAL enzyme(J).Finally,it was deduced that intercropping dandelion could effectively control the occurrence of pepper blight while also demonstrating a complex interaction with the pepper growing environment.

关键词： Intercropping pepper blight dandelion plant growth correlation analysis

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Climate Change and Its Adverse Impacts on plant growth in South Asia:Current Status and Upcoming Challenges

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Phyton-International Journal of Experimental Botany 2022年第4期91卷 695-711页

作者： Mohammad Saidur Rhaman Tahjib-Ul-Arif Mohammad Golam Kibria Anamul Hoque Department of Seed Science and Technology Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Biochemistry and Molecular Biology Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Soil Science Bangladesh Agricultural UniversityMymensingh2202Bangladesh

Socioeconomic development,adaptive capacity of the population,and demographic conditions across the states of South Asia make it more vulnerable to climate change.South Asia is daily going to be more vulnerable to climate change and climatic variability.This region is facing multiple challenges in terms of climate change,dilapidation of ecosystems,and food insecurity.Climate is the primary determining factor for agricultural output,which unswervingly influences food production across the globe.South Asia is mainly an agricultural foundation based region and thus the economy of these regions directly depends on agriculture and agricultural production.Due to the extensive dependence on natural assets for thriving,it makes the people of this region more vulnerable to climate change.This region is now under serious risk from sea-level rising and growing incidences of extreme events such as flash floods,enhanced temperature,drought,salinity,cyclones,storms,landslides,and irregularity of precipitation.These abiotic stresses continuously disturb plant growth and productivity.It is now the time to take urgent action on these issues towards a sustainable,inclusive and resource efficient way to overcome this.In this review,we summarize the overall situation of climate change in the South Asian countries and their adverse consequences on plants,and upcoming challenges towards a sustainable production.

关键词： Climate change South Asia plant growth abiotic stress food security

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Tire abrasion particles negatively affect plant growth even at low concentrations and alter soil biogeochemical cycling

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Soil Ecology Letters 2022年第4期4卷 409-415页

作者： Eva F.Leifheit Hanna L.Kissener Erik Faltin Masahiro Ryo Matthias C.Rillig Freie Universitat Berlin Institut fur Biologie14195 BerlinGermany Berlin-Brandenburg Institute of Advanced Biodiversity Research 14195 BerlinGermany Leibniz Centre for Agricultural Landscape Research(ZALF) 15374 MünchebergGermany Brandenburg University of Technology Cottbus-Senftenberg 03046 CottbusGermany

Tire particles(TPs)are a major source of microplastic on land,and considering their chemical composition,they represent a potential hazard for the terrestrial environment.We studied the effectsof TPs at environmentally relevant concentrations alongawide concentrationgradient(0–160 mg g^(-1))and tested the effects on plant growth,soil pH and the key ecosystem process of litter decomposition and soil respiration.The addition of TPs negatively affected shoot and root growth already at low concentrations.Tea litter decomposition slightly increased with lower additions of TPs but decreased later on.Soil pH increased until a TP concentration of 80 mg g^(-1) and leveled off afterwards.Soil respiration clearly increased with increasing concentration of added TPs.plant growth was likely reduced with starting contamination and stopped when contamination reached a certain level in the soil.The presence of TPs altered a number of biogeochemical soil parameters that can have further effects on plant performance.Considering the quantities of yearly produced TPs,their persistence,and toxic potential,we assume that these particles will eventually have a significant impact on terrestrial ecosystems.

关键词： Microplastic pollution Tire particles plant growth Soil respiration Soil pH Litter decomposition

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Toxicity mechanisms of photodegraded polyvinyl chloride nanoplastics on pea seedlings

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 111-124页

作者： Hao Wu Beibei He Bocheng Chen An Liu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Nanoplasctics(NPs),which are very small in particle size,exert toxic effect to organisms.Additionally,compared to original NPs,photodegraded NPs would pose higher toxicity.This is because their relatively higher specific surface areas and the presence of additives which can more easily leach.How original NPs and aged NPs affect plant growth has not been widely investigated.This work chose polyvinyl chloride NPs(PVC-NPs)that were subjected to up to 1000 h UV light radiation to explore the impact of PVC-NPs on the growth of pea seedlings(Pisum Sativum L.).The results indicated the existence of PVC-NPs with longer UV light radiation time and higher concentrations had more negative influences on pea seedlings’growth such as germination rate(decreased by 10.6%–22.5%),stem length(decreased by 2.8%–8.1%),dry weight(decreased by 6.3%–7.1%)and fresh weight(decreased by 6.7%–14.8%).It was also noted that photodegraded PVC-NPs resulted in damage to leaf stomata and roots,hindering photosynthesis and absorption of nutrients and hence the decrease in chlorophyll and soluble sugar contents.According to transcriptomic investigation results,the presence of aged PVC-NPs primarily influenced protein processing in endoplasmic reticulum(upregulated metabolic pathway)and phenylpropanoid biosynthesis(downregulated metabolic pathway)of pea seedlings.These results provide an in-depth understanding of how NPs influence the growth of plants.

关键词： Nanoplasctics Polyvinyl chloride Toxicity mechanisms plant growth

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Microalgal bioinoculants for sustainable agriculture and their interactions with soil biotic and abiotic components:A review

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Pedosphere 2024年第2期34卷 297-314页

作者： Shisy JOSE Nirmal RENUKA Sachitra Kumar RATHA Sheena KUMARI Faizal BUX Institute for Water and Wastewater Technology Durban University of TechnologyP.O.Box 1334Durban 4000South Africa Algal Biotechnology Laboratory Department of BotanyCentral University of PunjabBathinda 151401India Phycology Laboratory Council of Scientific and Industrial Research-National Botanical Research InstituteLucknowUttar Pradesh 226001India

Modern agricultural practices have posed a detrimental impact on the environment due to their intensive use to meet the food demands of an ever-increasing population.In this context,microalgal bioinoculants,specifically cyanobacteria and green microalgae,have emerged as sustainable options for agricultural practices to improve soil organic carbon,nutrient availability,microbial quality,and plant productivity.An overview of current and future perspectives on the use of microalgal bioinoculants in agriculture practices is presented in this review,along with a discussion of their interactions with soil biotic and abiotic factors that affect soil fertility,plant health,and crop productivity.The benefits of microalgal bioinoculants include releasing agronomically important metabolites(exopolymers and phytohormones)as well as solubilizing soil nutrients.Furthermore,they function as biocontrol agents against soil-borne pathogens and facilitate the establishment of rhizosphere communities of agricultural importance.So far,very few studies have explored the basic mechanisms by which microalgal bioinoculants interact with soil biotic and abiotic factors.In recent years,advanced molecular techniques have contributed to a better understanding of these interactions.

关键词： biocontrol agent biofertilizer cyanobacteria microalgae microbial community molecular technique plant growth soil fertility

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SPATULA as a Versatile Tool in plant:The Progress and Perspectives of SPATULA(SPT)Transcriptional Factor

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Phyton-International Journal of Experimental Botany 2024年第3期93卷 517-531页

作者： Lei Liang Xiangyang Hu Shanghai Key Laboratory of Bio-Energy Crops Research Center for Natural ProductsPlant Science CenterSchool of Life SciencesShanghai UniversityShanghai200444China

With the rapid development of modern molecular biology and bioinformatics,many studies have proved that transcription factors play an important role in regulating the growth and development of plants.SPATULA(SPT)belongs to the bHLH transcription family and participates in many processes of regulating plant growth and development.This review systemically summarizes the multiple roles of SPT in plant growth,development,and stress response,including seed germination,ﬂowering,leaf size,carpel development,and root elongation,which is helpful for us to better understand the functions of SPT.

关键词： SPT bHLH plant growth plant development Arabidopsis thaliana

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Effects of vegetable oil residue after soil extraction on physical-chemical properties of sandy soil and plant growth

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Journal of Environmental Sciences 2008年第12期20卷 1458-1462页

作者： B.M.Wilke Kassem Alef Institute of Ecology Berlin University of Technology

Vegetable oil has the ability to extract polycyclic aromatic hydrocarbons(PAHs)from contaminated sandy soil for a remediation purpose,with some of the oil remaining in the soil.Although most of the PAHs were removed,the risk of residue oil in the soil was not known.The objective of this study was to evaluate the effects of the vegetable oil residue on higher plant growth and sandy soil properties after soil extraction for a better understanding of the soil remediation.Addition of sunflower oil and column ex...

关键词： soil vegetable oil plant growth organic carbon pH

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Glycosylation of N-hydroxy-pipecolic acid equilibrates between systemic acquired resistance response and plant growth

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Molecular plant 2021年第3期14卷 440-455页

作者： Jianghua Cai Adam Jozwiak Lara Holoidovsky Michael MMeijler Sagit Meir Ilana Rogachev Asaph Aharoni Department of plant and Environmental Sciences Weizmann Institute of ScienceRehovot 761001Israel Department of Chemistry and the National Institute for Biotechnology in the Negev Ben-Gurion University of the NegevBe’er-Sheva 8410501Israel

N-hydroxy-pipecolic acid(NHP)activates plant systemic acquired resistance(SAR).Enhanced defense responses are typically accompanied by deficiency in plant development and reproduction.Despite of extensive studies on SAR induction,the effects of NHPmetabolismon plant growth remain largely unclear.In this study,we discovered that NHP glycosylation is a critical factor that fine-tunes the tradeoff between SAR defense and plant growth.We demonstrated that a UDP-glycosyltransferase(UGT76B1)forming NHP glycoside(NHPG)controls the NHP to NHPG ratio.Consistently,the ugt76b1 mutant exhibits enhanced SAR response and an inhibitory effect on plant growth,while UGT76B1 overexpression attenuates SAR response,promotes growth,and delays senescence,indicating that NHP levels are dependent on UGT76B1 function in the course of SAR.Furthermore,our results suggested that,upon pathogen attack,UGT76B1-mediated NHP glycosylation forms a‘‘hand brake’’on NHP accumulation by attenuating the positive regulation of NHP biosynthetic pathway genes,highlighting the complexity of SAR-associated networks.In addition,we showed that UGT76B1-mediated NHP glycosylation in the local site is important for fine-tuning SAR response.Our results implicate that engineering plant immunity through manipulating the NHP/NHPG ratio is a promising method to balance growth and defense response in crops.

关键词： N-hydroxy-pipecolic acid N-hydroxy-pipecolic acid glycoside UDP-glycosyltransferase glycosylation systemic acquired resistance plant growth

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