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Screening and evaluation of chilli(Capsicum annuum L.)genotypes for waterlogging tolerance at seedling stage

BIOCELL 2022年第7期46卷 1613-1627页

作者： MDREZWAN MOLLA MDMOTIAR ROHMAN MDROBYUL ISLAM mirza hasanuzzaman LUTFUL HASSAN Plant Genetic Resources Centre(PGRC) Bangladesh Agricultural Research Institute(BARI)Gazipur1701Bangladesh Molecular Breeding Lab Plant Breeding DivisionBangladesh Agricultural Research Institute(BARI)Gazipur1701Bangladesh Department of Agronomy Sher-e-Bangla Agricultural UniversityDhaka1207Bangladesh Department of Genetics and Plant Breeding Bangladesh Agricultural UniversityMymensingh2202Bangladesh

Waterlogging is an illustrious abiotic stress and the constrictions it enforces on plant roots have negative effects on growth and development.This study was undertaken to investigate waterlogging stress tolerant potential in chilli(Capsicum annum L.)genotypes through evaluating morphological,physiological,biochemical and anatomical parameters.Thirty-five days old seedlings of 10 chilli genotypes were exposed to waterlogging stress maintaining water height 3–5 cm over the soil surface artificially for three days.This duration(36–38 DAE)was termed as waterlogging period,and subsequent withdrawal of waterlogging condition(39–45 DAE)was regarded as a recovery phase.Based on their survival performance,two tolerant genotypes viz.,SRC-517 and BARI morich-2 and two susceptible genotypes viz.,AHM-206 and RI-1(6)were selected for studying stress tolerance mechanism.Under waterlogging,however,both genotypes(tolerant and susceptible)exhibited reduced root shoot length,dry weight ratio,petiole weight and leaf area,and noticeable reduction regarding these parameters was observed in susceptible genotypes.Moreover,tolerant genotypes displayed a higher recovery than susceptible genotypes after removal of waterlogging stress.Lower reduction of leaf area and photosynthetic pigments as well as higher reduction of relative water content(RWC)were noticed in susceptible genotypes.Higher accumulation of proline and total antioxidant capacity(TAC)during waterlogging condition in tolerant genotypes suggested lower oxidative damage.Although both genotypes lost total soluble sugar(TSS)relative to control at waterlogging stress,better performance was recorded in tolerant genotypes.During the period after the removal of extra water,a similar genotypic response in terms of TSS gain was seen.Undoubtedly,under flooding conditions,the development of aerenchyma cells in tolerant genotypes is a means of tolerance mechanism for long-term survival.Thus,the morpho-physiological and biochemical changes help to understand the tolerance mechanism in chi

关键词： Abiotic stress Anoxia Flooding Hypoxia Pepper Photosynthetic pigments Proline

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Changes in Germination and Seedling Traits of Sesame under Simulated Drought

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Phyton-International Journal of Experimental Botany 2022年第4期91卷 713-726页

作者： Mukhtar Ahmed Ahmed M.S.Kheir Muhammad Zeeshan Mehmood Shakeel Ahmad mirza hasanuzzaman Department of Agronomy PMAS-Arid Agriculture UniversityRawalpindi46300Pakistan International Center for Biosaline Agriculture Directorate of ProgramsDubai14660United Arab Emirates Soils Water and Environment Research InstituteAgricultural Research CenterCairo UniversityGiza12613Egypt Department of Agronomy Bahauddin Zakariya UniversityMultan60800Pakistan Department of Agronomy Sher-e-Bangla Agricultural UniversityDhaka1207Bangladesh

Drought is considered one of the leading abiotic constraints to agricultural crop production globally.Present study was conducted to assess the effects of different drought treatments(viz.Control,10%PEG,and 20%PEG)on seed germination,germination indices,seedling traits,and drought tolerance indices of sesame.Our results showed that maximum reduction in the studied parameters was observed at higher PEG concentration(i.e.,20%PEG).As compared to control,the drought treatments viz.10%and 20%PEG decreased the values for germination indices,such as germination percentage,coefficient of variation of germination time,germination index,and seedling vigor index.Similarly,for seedling traits,the values were decreased for root length,shoot length,root shoot ratio,root fresh weight,shoot fresh weight,root dry weight and shoot dry weight under 10%and 20%PEG treatments significantly in comparison with control.Furthermore,relative to control,the values for drought tolerance indices,such as germination drought tolerance index,root length drought tolerance index,shoot length drought tolerance index,total seedling length drought tolerance index,root fresh weight drought tolerance index,shoot fresh weight drought tolerance index,total fresh weight drought tolerance index,root dry weight drought tolerance index,shoot dry weight drought tolerance index and total dry weight drought tolerance index were also reduced under 10%and 20%PEG treatments,respectively.Our results confirms that drought impact on seed germination and seedling traits could be quantified by using different indices which can further help to design drought adaptation and mitigation strategies.Based on these results it can be concluded that germination indices,seedling traits,and drought tolerance indices have great potential to simulate drought stress impacts on different crop traits thus they should be used in all kinds of stress related studies.

关键词： Sesame drought stress PEG germination indices seedling traits drought tolerance indices

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Elicitation-Based Modulation of Shelf Life in Fruits: Physiological and Molecular Insights

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Phyton-International Journal of Experimental Botany 2023年第8期92卷 2283-2300页

作者： Ankita Kundu Abir Das Sayan Pal Arijit Ghosh Malay Kumar Adak Masayuki Fujita mirza hasanuzzaman Plant Physiology and Molecular Biology Research Unit Department of BotanyUniversity of KalyaniKalyani741235India Laboratory of Plant Stress Responses Faculty of AgricultureKagawa UniversityKagawa761-0795Japan Department of Agronomy Faculty of AgricultureSher-E-Bangla Agricultural UniversityDhaka1207Bangladesh

The process of ripening involves physiological and biochemical events that become a concern during postharvest storage.We have documented different approaches for the preservation and maintenance of fruit quality during the postharvest period that are biocompatible and fully safe for consumption.Chemical residues that sustain sensory characteristics,such as color,ﬂavor,aroma,and texture,are considered.In fruit ripening,both physical and chemical elicitors are described that regulate ethylene biosynthesis or its signaling for gene expression.The key regulatory enzymes,such as ACC synthase and ACC oxidase,for ethylene biosynthesis,are important for both climacteric and non-climacteric fruits.Anti-oxidizing genes that retain sensory characteristics are concerns in this respect.Chemical elicitors,including chitosan,polyamine,phenolics,lipopolysaccharide,silver derivatives,and nanocomposites,are described.Gas pressure,light wavelengths,relative humidity,cooling,and other environmental factors are important for improved postharvest storage.These elicitors maintain redox status by inhibiting the generation of reactive oxygen species(ROS)or their lysis.Growth regulators,including abscisic acid,auxin,brassinosteroids,jasmonic acid,and salicylic acid,are important for the regulation of ripening.Mechanical injuries,ionic imbalances,temperature variations,and tissue dehydration can occur irrespective of ripening cate-gories.The use of synthetic physiochemically active compounds is discussed in terms of physiological,metabolic,cellular,and molecular functions.Ethylene-induced autocatalytic processes,antioxidant cascades,epigenetic regulation,and homeodomain gene expression are discussed.Sugar–acid metabolism,dissolution of the cell wall,and direct or indirect production of secondary metabolites related to postharvest storage are mentioned regarding chilling storage.Elicitors and agrochemicals that trigger plant defense to increase secondary metabolite production are discussed for reducing fruit senescence during postharvest s

关键词： Epigenetics ethylene elicitors ripening polyphenolics postharvest storage

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In Vitro Synthetic Seed Production of Potato under Different Fungicide Levels and Storage Intervals

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Phyton-International Journal of Experimental Botany 2023年第8期92卷 2429-2450页

作者： Tahira Kalsoom Touqeer Ahmed Muhammad Azam Khan mirza hasanuzzaman Mukhtar Ahmed Stefaan P.O.Werbrouck Department of Horticulture PMAS-Arid Agriculture UniversityRawalpindi46300Pakistan Department of Agronomy Sher-e-Bangla Agricultural UniversityDhaka1207Bangladesh Department of Agronomy PMAS-Arid Agriculture UniversityRawalpindi46300Pakistan Department of Plants and Crops Ghent UniversityGhent9000Belgium

Potato propagation through tubers and seed is an inefﬁcient way of propagation thus we propose an alternative method in this study which is in vitro propagation.Plantlets were raised from True Potato Seeds(TPS)in test tubes containing 10 mL of Murashige Skoog(MS)medium.Subculturing was done after every 21 days and after four subsequent subculturing,when there was an adequate quantity of stock material,uninodal cuttings of about 3-4 mm in length were prepared from in vitro proliferated potato plants by excising leaves of 1-2 mm on each side of the node.Prepared uninodal cuttings were cultured on 1/2 strength MS medium for root primordia development.The selected uninodal cuttings with root primordia were encapsulated with sodium alginate solution(3.5%(w/v)),mixed with 1.25%charcoal and different concentration of fungicide(thiophanate methyl,sigma)to enhance the viability percentage of synthetic seed.Furthermore,these encapsulated uninodal cuttings were subjected to different storage intervals to check maximum storage.Results showed that optimum dose for fungicide is 150 mg/L as it resulted in good viability percentage,shoot number,shoot length,rooting percentage,root number,root length and ideal for bead formation with sodium alginate.Similarly,results revealed that encapsulated uninodal cuttings can be stored at a temperature of 4℃ up to 45 days with a survival rate of 63.33%.Encapsulated uninodal cutting stored for 60 days showed a poor viability percentage of about 43.03%.It can be concluded that optimum dose of 150 mg/L with storage time of 45 days should be used to get a better outcome for synthetic potato seed production.

关键词： Synthetic seeds potato storage charcoal sodium alginate fungicide

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Nitric oxide alleviates cadmium-impeded growth by limiting ROS accumulation in pea seedlings

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BIOCELL 2022年第12期46卷 2583-2593页

作者： EKHLAQUE A.KHAN HAMDINO M.I.AHMED MEENA MISRA PALLAVI SHARMA AMARENDRA N.MISRA mirza hasanuzzaman Department of Life Sciences Central University of JharkhandRanchi835205India Department of Biotechnology Chaudhary Bansi Lal UniversityBhiwani127021India Horticulture Research Institute(HRI) Agricultural Research Center(ARC)Giza12619Egypt School of Environment and Sustainable Development Central University of GujratGandhinagar382030India School of Applied Sciences Centurion University of Technology and ManagementBhubaneswar752050India Department of Agronomy Faculty of AgricultureSher-e-Bangla Agricultural UniversityDhaka1207Bangladesh

Cadmium(Cd)causes oxidative stress,which leads to the oxidation of various biomolecules by the production of reactive oxygen species(ROS)to facilitate programmed cell death(PCD).The antioxidant defense system fails to detoxify ROS when it is produced in excess.Nitric oxide(NO),a gaseous free radical and a phytohormone,regulates various physiological processes of plants.Therefore,this work was undertaken to study the effects of the application of exogenous sodium nitroprusside(SNP,a NO donor)on growth parameters,oxidative stress,accumulation of secondary metabolites,and activities of antioxidant enzymes under Cd stress.Mild(50μM)and severe(200μM)Cd stress were applied to hydroponically grown pea(Pisum sativum L.)plants with or without 50μM SNP.Severe Cd stress had a substantial impact on the plants.The effectiveness of NO in reducing Cd-induced negative effects on plant height,fresh weight,dry weight,protein content,nitrite content,nitrate reductase(NR)activity,catalase activity,and peroxidase activity were investigated.Seedling development,protein content,nitrite content,nitrate reductase(NR)activity,antioxidant defense systems disruption,overproduction of reactive oxygen species,and oxidative damage were observed.The antioxidant defense system(catalase and peroxidase activities)was activated by NO,which resulted in lower lipid peroxidation and lower hydrogen peroxide(H2O2)levels in Cd-exposed plants.SNP treatment boosted endogenous NO levels and NR activity in Cd-stressed plants while also enhanced proline levels to preserve osmotic equilibrium.The presence of total phenols and flavonoids increased after SNP treatment,indicating that SNP enhanced stress recovery and boosted plant development in Cd-stressed plants.

关键词： Cadmium SNP Reactive oxygen species Oxidative stress Programmed cell death

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Organic Amendments Improve Plant Morpho-Physiology and Antioxidant Metabolism in Mitigating Drought Stress in Bread Wheat(Triticum aestivum L.)

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Phyton-International Journal of Experimental Botany 2022年第9期91卷 1959-1972页

作者： Taufika Islam Anee Md.Nur Nabi Islam Mohamed M.Hassan Abdul Awal Chowdhury Masud Md.Mahabub Alam mirza hasanuzzaman Department of Agronomy Faculty of AgricultureSher-e-Bangla Agricultural UniversityDhaka1207Bangladesh Department of Biology College of ScienceTaif UniversityTaif21944Saudi Arabia

Due to the unpredictable climate change,drought stress is being considered as one of the major threats to crop production.Wheat(Triticum aestivum L.cv.BARI Gom-26)being a dry season crop frequently faces scarcity of water and results in a lower yield.Therefore,this experiment aims to explore the role of different organic amendments(OAs)in mitigating drought stress-induced damage.The pot experiment consisted of different organic amendments viz.compost,vermicompost and poultry manure@0.09 kg m^(−2)soil,biochar@2.5%w/w soil and chitosan@1%w/w soil which was imposed on the plants grown under both well-watered and drought conditions.Results showed that drought stress reduced plant height(15%),SPAD value(16%),relative water content(13%),number of spikelet spike^(−1)(17%),number of grains spike^(−1)(12%),and 100-grain weight(18%).Organic amendments act as a protectant and reduce drought stress-induced damages by enhancing the morpho-physiological and yield attributes.Vermicompost enhanced SPAD value by 18%,number of spikelets spike^(−1)by 20%,number of grains spike^(−1)by 17%,whereas poultry manure increased plant height by 16%under drought condition compared to control plant.Unlike other OAs applied,vermicompost was proved to be capable of reducing the higher lipid peroxidation and proline content raised by drought condition.Drought stress-induced increment of catalase,ascorbate peroxidase and glutathione reductase activities were also efficiently modulated by the organic amendment application.The present study concluded that OAs play significant roles in alleviating drought stressinduced damages by improving the morpho-physiological attributes and among the different types of OAs used vermicompost performed better which in addition ceased the production of reactive oxygen species.

关键词： Antioxidant defense biochar cereal crop chitosan compost poultry manure reactive oxygen species vermicompost

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Exogenous Selenium Mitigates Salt Stress in Soybean by Improving Growth,Physiology,Glutathione Homeostasis and Antioxidant Defense

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Phyton-International Journal of Experimental Botany 2021年第2期90卷 373-388页

作者： Hesham F.Alharby mirza hasanuzzaman Hassan S.Al-Zahrani Khalid Rehman Hakeem Department of Biological Sciences Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Agronomy Sher-e-Bangla Agricultural UniversityDhaka1207Bangladesh

The mechanism of selenium(Se)-induced salt tolerance was studied in moderately sensitive soybean(Glycine max L.)plants.To execute this view,soybean plants were imposed with salt stress(EC 6 dS m^(−1))applying NaCl.In other treatments,Se(0,25,50 and 75μM Na_(2)SeO_(4))was sprayed as co-application with that level of salt stress.Plant height,stem diameter,leaf area,SPAD value decreased noticeably under salt stress.Altered proline(Pro)level,together with decreased leaf relative water content(RWC)was observed in salt-affected plants.Salt stress resulted in brutal oxidative damage and increased the content of H_(2)O_(2),MDA level and electrolyte leakage.Exogenous Se spray alleviated oxidative damage through boosting up the antioxidant defense system by increasing the activity of antioxidant enzymes such as catalase(CAT),peroxidase(POD)and glutathione reductase(GR),as well as by improving non-enzymatic antioxidants like glutathione(GSH)and GSH/glutathione disulfide(GSSG).The upregulated antioxidant defense system,restored Pro and leaf RWC,higher SPAD value conferred better growth and development in Se-sprayed salt-affected soybean plants which altogether put forth for the progressive yield contributing parameters and finally,seed yield.Among different doses of Se,soybean plants sprayed with 50μM Na_(2)SeO_(4)showed better salt tolerance.

关键词： Trace elements selenium antioxidant system oxidative stress salinity oilseed crop

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Targeting Glycinebetaine for Abiotic Stress Tolerance in Crop Plants:Physiological Mechanism,Molecular Interaction and Signaling

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Phyton-International Journal of Experimental Botany 2019年第3期88卷 185-221页

作者： mirza hasanuzzaman Aditya Banerjee M.H.M.Borhannuddin Bhuyan Aryadeep Roychoudhury Jubayer Al Mahmud Masayuki Fujita Department of Agronomy Faculty of AgricultureSher-e-Bangla Agricultural UniversityDhakaBangladesh Post Graduate Department of Biotechnology St.Xavier’s College(Autonomous)30Mother Teresa SaraniKolkataWest BengalIndia Laboratory of Plant Stress Responses Department of Applied Biological ScienceFaculty of AgricultureKagawa University2393 IkenobeMiki-choKita-gunKagawaJapan Bangladesh Agricultural Research Institute JoydebpurGazipurBangladesh Department of Agroforestry and Environmental Science Faculty of AgricultureSher-e-Bangla Agricultural UniversityDhakaBangladesh

In the era of climate change,abiotic stresses(e.g.,salinity,drought,extreme temperature,flooding,metal/metalloid(s),UV radiation,ozone,etc.)are considered as one of the most complex environmental constraints that restricts crop production worldwide.Introduction of stress-tolerant crop cultivars is the most auspicious way of surviving this constraint,and to produce these types of tolerant crops.Several bioengineering mechanisms involved in stress signaling are being adopted in this regard.One example of this kind of manipulation is the osmotic adjustment.The quarternary ammonium compound glycinebetaine(GB),also originally referred to as betaine is a methylated glycine derivative.Among the betaines,GB is the most abundant one in plants,which is mostly produced in response to dehydration caused by different abiotic stresses like drought,salinity,and extreme temperature.Glycinebetaine helps in decreased accumulation and detoxification of ROS,thereby restoring photosynthesis and reducing oxidative stress.It takes part in stabilizing membranes and macromolecules.It is also involved in the stabilization and protection of photosynthetic components,such as ribulose-1,5-bisphosphate carboxylase/oxygenase,photosystem II and quarternary enzyme and protein complex structures under environmental stresses.Glycinebetaine was found to perform in chaperone-induced protein disaggregation.In addition,GB can confer stress tolerance in very low concentrations,and it acts in activating defense responsive genes with stress protection.Recently,field application of GB has also shown protective effects against environmental adversities increasing crop yield and quality.In this review,we will focus on the role of GB in conferring abiotic stress tolerance and the possible ways to engineer GB biosynthesis in plants.

关键词： Osmolytes compatible solutes biostimulants proline amino acids stress signaling

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Screening and Assessment of Selected Chilli (Capsicum annuum L.) Genotypes for Drought Tolerance at Seedling Stage

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Phyton-International Journal of Experimental Botany 2021年第5期90卷 1425-1443页

作者： Md.Rezwan Molla Md.Motiar Rohman Mahmuda Binte Monsur mirza hasanuzzaman Lutful Hassan Plant Genetic Resources Centre Bangladesh Agricultural Research InstituteGazipur1701Bangladesh Molecular Breeding Laboratory Plant Breeding DivisionBangladesh Agricultural Research InstituteGazipur1701Bangladesh Department of Agronomy Faculty of AgricultureSher-e-Bangla Agricultural UniversityDhaka1207Bangladesh Department of Genetics and Plant Breeding Bangladesh Agricultural UniversityMymensingh2202Bangladesh

This study was undertaken to investigate oxidative stress tolerant mechanisms in chilli(Capsicum annuum L.)under drought genotypes through evaluating morphological,physiological,biochemical and stomatal parameters.Twenty genotypes were evaluated for their genetic potential to drought stress tolerant at seedling stage.Thirty days old seedlings were exposed to drought stress induced by stop watering for the following 10 days and rewatering for the following one week as recovery.Based on their survival performance,two tolerant genotypes viz.BD-10906 and BD-109012 and two susceptible genotypes viz.BD-10902 and RT-20 were selected for studying the oxidative stress tolerance mechanism.Drought reduced root and shoot length,dry weight,ratio,petiole weight and leaf area in both tolerant and susceptible genotypes,and a higher reduction was observed in susceptible genotypes.Lower reduction of leaf area and photosynthetic pigments were also found in tolerant genotypes.Moreover,tolerant genotypes showed higher recovery than susceptible genotypes after the removal of stress.A higher reduction of relative water content(RWC)may cause an imbalance between absorbed and transpirated water in susceptible genotypes.Higher accumulation of proline in tolerant genotypes might be helpful to for better osmotic maintenance than that in susceptible genotypes.Tolerant genotypes showed higher antioxidant activity as they showed DPPH radical scavenging percentage than the susceptible genotypes.Moreover,closer stomata in tolerant genotypes than susceptible ones helped to avoid dehydration in tolerant genotypes.Thus,the above morphological,physiological,biochemical and stomatal parameters helped to show better tolerance in chilli under drought stress.

关键词： Chilli drought stress tolerance morphology physiology biochemical altern

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Salt-Induced Changes in Physio-Biochemical and Antioxidant Defense System in Mustard Genotypes

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Phyton-International Journal of Experimental Botany 2020年第3期89卷 541-559页

作者： Md.Shakhawat Hossain Md.Daud Hossain Abdul Hannan mirza hasanuzzaman Md.Motiar Rohman Central Laboratory Research WingBangladesh Agricultural Research InstituteGazipur 1701Bangladesh Seed Technology Division Bangladesh Agricultural Research InstituteGazipur 1701Bangladesh Department of Agronomy Sher-e-Bangla Agricultural UniversityDhaka 1207Bangladesh Molecular Breeding Lab Plant Breeding DivisionBangladesh Agricultural Research InstituteGazipur 1701Bangladesh

Salinity stress is a major factor limiting plant growth and productivity of many crops including oilseed.The present study investigated the identification of salt tolerant mustard genotypes and better understanding the mechanism of salinity tolerance.Salt stresses significantly reduced relative water content(RWC),chlorophyll(Chl)content,K^(+) and K^(+)/Na^(+) ratio,photosynthetic rate(P N),tran-spiration rate(Tr),stomatal conductance(gs),intercellular CO_(2) concentration(Ci)and increased the levels of proline(Pro)and lipid peroxidation(MDA)contents,Na+,superoxide(O_(2)^(•−))and hydrogen peroxide(H_(2)O_(2))in both tolerant and sensitive mustard genotypes.The tolerant genotypes maintained higher Pro and lower MDA content than the salt sensitive genotypes under stress condition.The activities of superoxide dismutase(SOD),catalase(CAT),peroxidase(POD),glutathione peroxidase(GPX),monodehydroascorbate reductase(MDHAR)and dehydroascorbate reductase(DHAR)were increased with increasing salinity in salt tolerant genotypes,BJ-1603,BARI Sarisha-11 and BARI Sarisha-16,but the activities were unchanged in salt sensitive genotype,BARI Sarisha-14.Besides,the increment of ascorbate peroxidase(APX)activity was higher in salt sensitive genotype as compared to tolerant ones.However,the activ-ities of glutathione reductase(GR)and glutathione S-transferase(GST)were increased sharply at stress conditions in tolerant genotypes as compared to sensi-tive genotype.Higher accumulation of Pro along with improved physiological and biochemical parameters as well as reduced oxidative damage by up-regulation of antioxidant defense system are the mechanisms of salt tolerance in selected mustard genotypes,BJ-1603 and BARI Sarisha-16.

关键词： Mustard saline sensitivity photosynthesis antioxidants ionic imbalance oxidative stress

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