Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

plant growth promoting bacteria --- arbuscular mycorrhizal fungi --- Biotechnology --- Climatic stresses --- Plant-Microbe Interactions --- sustainable agriculture

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Plant growth-promoting microorganisms (PGPM) are groups of rhizosphere microorganisms capable of colonizing the root environment. Some of the microbes that inhabit this zone are bacteria and fungi that are capable of efficiently colonizing roots and rhizosphere soil. These microorganisms can be used as biofertilizers for improving agricultural production even under stressful environmental conditions. In contrast to PGPM, plant growth regulators (PGR) are chemical compounds that significantly affect the growth and differentiation of plant cells and tissues. They function as chemical messengers for intercellular communication and play a vital role in plant signaling networks as they are involved in the plant developmental process and a wide range of biotic and abiotic stress responses. The application of PGPM and plant growth regulators/hormones or the synthesis of PGR and signal transduction, perception, and cross-talk creates a complex network that plays an essential role in the regulation of plant physiological processes. A better understanding of the mechanism of action of PGPM and PGR and their roles in plant growth and development, interaction and independence in their action, and hormonal crosstalk under stresses is essential for agricultural production and research. Therefore, this book has contributions in the form of research and review papers from eminent scientists worldwide and discusses the role of PGPM and PGR in agriculture production and research, their potentials as biocontrol agents, their effects on physicochemical properties of soil, innovation for sustainable agriculture, their role in seed transplanting, and their role in mitigating biotic and abiotic stresses.

Paecilomyces --- PGPF --- tomato --- pepper --- plant probiotic microorganisms --- Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae) --- Solanum lycopersicum L. --- secondary metabolites --- plant insect interactions --- seaweed extract --- phytohormone profiling --- fertilizers --- antioxidant --- plant growth regulators --- brown seaweed --- green algae --- abiotic stresses --- cell membrane stability --- climate change --- osmolytes --- polyamines --- bacterial community composition --- liquid food waste materials (LFM) --- plant growth-promoting bacteria (PGPB) --- plant growth-promoting (PGP) traits --- salinity --- PGPR --- wheat --- compatible solutes --- antioxidant enzymes --- Trichoderma --- plant growth promotion --- biostimulant --- aridity --- Bacillus sp. --- biochar --- nutrient availability --- organic matter --- soil health --- mVOCs --- Plant growth promoting rhizobacteria --- Mentha piperita --- Bacillus amyloliquefaciens GB03 --- salt stress --- MDA --- DPPH --- Bradyrhizobium japonicum --- Pseudomonas putida --- plant growth --- plant nutrients --- soil enzymes --- soil nutrients --- soybean --- sweet pepper --- Bacillus --- chitosan --- chlorophyll fluorescence --- fruit yield --- plant growth promoting microorganisms --- abiotic stress --- biotic stress --- flavonoids --- biotic and abiotic stress --- symbiosis --- signaling --- rhizobium --- AMF --- allelopathy --- biocontrol Aspergillus japonicus --- root-knot nematode --- fermentation filtrate --- biological control --- seed germination --- α-Tocopherol --- antioxidants --- drought --- nutrient dynamics --- tissue specific response --- deep N fertilization --- peroxidase activity --- catalase activity --- rice cultivation --- ABA biosynthesis --- drought stress --- gene expression --- signaling network --- transporters --- Zea mays L. --- environmental stresses --- endophytic bacteria --- plant growth promoting ability --- chromium --- Staphylococcus aureus --- oxidative stress --- available phosphorus --- enriched compost --- poultry litter --- rock phosphate --- pear trees --- PGR --- sustainable development --- crop nutrition --- fertiliser --- Timac Agro Italia --- allelopathic bacteria --- antimetabolites --- phytotoxic metabolites --- rhizobacteria --- weed invasion --- anthocyanins --- color --- fruit size --- phenolics --- Punica granatum --- PGPMs (plant growth-promoting microorganisms) --- tee tree oil --- plant biostimulants --- soil-borne phytopathogens --- antagonistic fungi --- biocontrol --- biotic effect --- crop production --- RIDER --- drylands --- water conservation --- biomass reduction --- cereal crops --- growth regulators --- metal stress --- sugar beet --- nitrogen fertilizer --- gibberellic acid --- TSS --- sugar yield --- n/a

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Over the past decade, interest in plant biostimulants has been on the rise, compelled by the growing interest of researchers, extension specialists, private industries, and farmers in integrating these products in the array of environmentally friendly tools to secure improved crop performance, nutrient efficiency, product quality, and yield stability. Plant biostimulants include diverse organic and inorganic substances, natural compounds, and/or beneficial microorganisms such as humic acids, protein hydrolysates, seaweed and plant extracts, silicon, endophytic fungi like mycorrhizal fungi, and plant growth-promoting rhizobacteria belonging to the genera Azospirillum, Azotobacter, and Rhizobium. Other substances (e.g., chitosan and other biopolymers and inorganic compounds) can have biostimulant properties, but their classification within the group of biostimulants is still under consideration. Plant biostimulants are usually applied to high-value crops, mainly greenhouse crops, fruit trees and vines, open-field crops, flowers, and ornamentals to sustainably increase yield and product quality. The global biostimulant market is currently estimated at about $2.0 billion and is expected to reach $3.0 billion by 2021 at an annual growth rate of 13%. A growing interest in plant biostimulants from industries and scientists was demonstrated by the high number of published peer-reviewed articles, conferences, workshops, and symposia in the past ten years. This book compiles several original research articles, technology reports, methods, opinions, perspectives, and invited reviews and mini reviews dissecting the biostimulatory action of these natural compounds and substances and beneficial microorganisms on crops grown under optimal and suboptimal growing conditions (e.g., salinity, drought, nutrient deficiency and toxicity, heavy metal contaminations, waterlogging, and adverse soil pH conditions). Also included are contributions dealing with the effect as well as the molecular and physiological mechanisms of plant biostimulants on nutrient efficiency, product quality, and modulation of the microbial population both quantitatively and qualitatively. In addition, identification and understanding of the optimal method, time, rate of application and phenological stage for improving plant performance and resilience to stress as well as the best combinations of plant species/cultivar × environment × management practices are also reported. We strongly believe that high standard reflected in this compilation on the principles and practices of plant biostimulants will foster knowledge transfer among scientific communities, industries, and agronomists, and will enable a better understanding of the mode of action and application procedures of biostimulants in different cropping systems.

Crocus sativus L. --- biofertilization --- arbuscular mycorrhizal fungi --- antioxidant activity --- crocin --- picrocrocin --- polyphenols --- safranal --- Maize --- biostimulant --- root --- stress --- growth --- gene expression --- stem cuttings --- propagation --- root morphology traits --- indole-3-acetic acid (IAA) --- indole-3-butyric acid (IBA) --- gibberellins --- phenolic compounds --- nutrients --- nutraceutical potential --- soybean --- yield --- N organic fertilizer --- seaweed extract --- mycorrhizal inoculants --- phosphate-solubilizing microorganisms --- biofertilizers --- microorganism consortium --- biostimulants --- Crocus sativus --- Funneliformis mosseae --- glasshouse --- protected cultivation --- Rhizophagus intraradices --- substrate --- L-methionine --- L-tryptophan --- L-glycine --- lettuce --- nitrogen --- plant biostimulant --- environmental stress --- vegetables --- fruit quality --- plants biostimulants --- yielding --- Biostimulants --- Euglena gracilis --- algal polysaccharide --- β-glucan --- water stress --- tomato --- aeroponics --- Zea mays L --- lignohumate --- lignosulfonate --- biological activity --- nitrogen metabolism --- carbon metabolism --- proteins --- phenolics --- sugars --- Ascophyllum nodosum --- Solanum melongena --- heterostyly --- pollination efficiency --- soilless conditions --- abiotic stress --- alfalfa hydrolysate --- chitosan --- zinc --- ascorbic acid --- Fragaria x ananassa --- functional quality --- lycopene --- organic farming --- protein hydrolysate --- Solanum lycopersicum L. --- tropical plant extract --- fertilizer --- melatonin --- phytomelatonin --- plant protector --- plant stress --- Lactuca sativa L. --- legume-derived protein hydrolysate --- nitrate --- Septoria --- wheat --- Paraburkholderia phytofirmans --- thyme essential oil --- isotope --- phytoparasitic nematodes --- suppressiveness --- sustainable management --- anti-nutritional substances --- fat --- fibre --- morphotype --- protein --- corn --- imaging --- industrial crops --- maize --- next generation sequencing --- phenomics --- plant phenotyping --- row crops --- Bacillus subtilis --- carotenoids --- probiotics --- PGPR --- Mentha longifolia --- humic acid --- antioxidants --- arbuscular mycorrhizal symbiosis --- mycorrhizosphere --- AMF associated bacteria --- plant growth-promoting bacteria --- phosphate-solubilizing bacteria --- siderophore production --- soil enzymatic activity --- biological index fertility --- nitrogenase activity --- microelements fertilization (Ti, Si, B, Mo, Zn) --- seed coating --- cover crop --- vermicompost --- growth enhancement --- AM fungi --- PGPB --- water deficit --- common bean --- Glomus spp. --- organic acids --- pod quality --- seaweed extracts --- seed quality --- tocopherols --- total sugars --- bean --- amino acids --- phenols --- flavonoids --- microbial biostimulant --- non-microbial biostimulant --- Lactuca sativa L. var. longifolia --- mineral profile --- physiological mechanism --- photosynthesis --- biocontrol --- plant growth promotion --- soil inoculant --- Trichoderma --- Azotobacter --- Streptomyces --- deproteinized leaf juice --- fermentation --- lactic acid bacteria --- plant nutrition --- antioxidant capacity --- ornamental plants --- N fertilization --- nitrogen use efficiency --- leaf quality --- Spinacia oleracea L. --- sustainable agriculture --- Valerianella locusta L. --- isotopic labeling --- turfgrass --- humic acids --- leaf area index (LAI) --- specific leaf area (SLA) --- Soil Plant Analysis Development (SPAD) index --- tuber yield --- ultrasound-assisted water --- foliar spray --- Pterocladia capillacea --- bio-fertilizer --- growth parameters --- Jew’s Mallow --- CROPWAT model --- eco-friendly practices --- total ascorbic acid --- Mater-Bi® --- mineral composition --- SPAD index --- Bacillus thuringiensis --- Capsicum annuum --- microbiome --- strain-specific primer --- tracking --- sweet basil --- alfalfa brown juice --- biostimulation --- chlorophyll pigments --- histological changes --- humic substances --- protein hydrolysates --- silicon --- arbuscular mycorrhiza --- plant growth promoting rhizobacteria --- macroalgae --- microalgae --- abiotic stresses --- nutrient use efficiency --- physiological mechanisms