Browsing by Author "Carlos García-Estrada"

Now showing 1 - 6 of 6

Antimicrobial secondary metabolites from agriculturally important bacteria as next-generation pesticides
(Springer, 2020) Chetan Keswani; Harikesh B. Singh; Carlos García-Estrada; John Caradus; Ya-Wen He; Samia Mezaache-Aichour; Travis R. Glare; Rainer Borriss; Estibaliz Sansinenea
The whole organisms can be packaged as biopesticides, but secondary metabolites secreted by microorganisms can also have a wide range of biological activities that either protect the plant against pests and pathogens or act as plant growth promotors which can be beneficial for the agricultural crops. In this review, we have compiled information about the most important secondary metabolites of three important bacterial genera currently used in agriculture pest and disease management. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
Antimicrobial secondary metabolites from agriculturally important fungi as next biocontrol agents
(Springer, 2019) Chetan Keswani; Harikesh B. Singh; Rosa Hermosa; Carlos García-Estrada; John Caradus; Ya-Wen He; Samia Mezaache-Aichour; Travis R. Glare; Rainer Borriss; Francesco Vinale; Estibaliz Sansinenea
Synthetic chemical pesticides have been used for many years to increase the yield of agricultural crops. However, in the future, this approach is likely to be limited due to negative impacts on human health and the environment. Therefore, studies of the secondary metabolites produced by agriculturally important microorganisms have an important role in improving the quality of the crops entering the human food chain. In this review, we have compiled information about the most important secondary metabolites of fungal species currently used in agriculture pest and disease management. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
Auxins of microbial origin and their use in agriculture
(Springer Science and Business Media Deutschland GmbH, 2020) Chetan Keswani; Satyendra Pratap Singh; Laura Cueto; Carlos García-Estrada; Samia Mezaache-Aichour; Travis R. Glare; Rainer Borriss; Surya Pratap Singh; Miguel Angel Blázquez; Estibaliz Sansinenea
To maintain the world population demand, a sustainable agriculture is needed. Since current global vision is more friendly with the environment, eco-friendly alternatives are desirable. In this sense, plant growth–promoting rhizobacteria could be the choice for the management of soil-borne diseases of crop plants. These rhizobacteria secrete chemical compounds which act as phytohormones. Indole-3-acetic acid (IAA) is the most common plant hormone of the auxin class which regulates various processes of plant growth. IAA compound, in which structure can be found a carboxylic acid attached through a methylene group to the C-3 position of an indole ring, is produced both by plants and microorganisms. Plant growth–promoting rhizobacteria and fungi secrete IAA to promote the plant growth. In this review, IAA production and mechanisms of action by bacteria and fungi along with the metabolic pathways evolved in the IAA secretion and commercial prospects are revised. Key points • Many microorganisms produce auxins which help the plant growth promotion. • These auxins improve the plant growth by several mechanisms. • The auxins are produced through different mechanisms. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
Biosynthesis and beneficial effects of microbial gibberellins on crops for sustainable agriculture
(Oxford University Press, 2022) Chetan Keswani; Satyendra P. Singh; Carlos García-Estrada; Samia Mezaache-Aichour; Travis R. Glare; Rainer Borriss; Vishnu D. Rajput; Tatiana M. Minkina; Aurelio Ortiz; Estibaliz Sansinenea
Soil microbes promote plant growth through several mechanisms such as secretion of chemical compounds including plant growth hormones. Among the phytohormones, auxins, ethylene, cytokinins, abscisic acid and gibberellins are the best understood compounds. Gibberellins were first isolated in 1935 from the fungus Gibberella fujikuroi and are synthesized by several soil microbes. The effect of gibberellins on plant growth and development has been studied, as has the biosynthesis pathways, enzymes, genes and their regulation. This review revisits the history of gibberellin research highlighting microbial gibberellins and their effects on plant health with an emphasis on the early discoveries and current advances that can find vital applications in agricultural practices. © 2021 The Society for Applied Microbiology.
Preface
(Springer Singapore, 2019) Harikesh Bahadur Singh; Chetan Keswani; M.S. Reddy; Estibaliz Sansinenea; Carlos García-Estrada
[No abstract available]
Secondary metabolites of plant growth promoting rhizomicroorganisms: Discovery and applications
(Springer Singapore, 2019) Harikesh Bahadur Singh; Chetan Keswani; M.S. Reddy; Estibaliz Sansinenea; Carlos García-Estrada
Recent changes in the pattern of agricultural practices from use of hazardous pesticides to natural (organic) cultivation has brought into focus the use of agriculturally important microorganisms for carrying out analogous functions. The reputation of plant growth promoting rhizomicroorganisms (PGPRs) is due to their antagonistic mechanisms against most of the fungal and bacterial phytopathogens. The biocontrol potential of agriculturally important microorganisms is mostly attributed to their bioactive secondary metabolites. However, low shelf life of many potential agriculturally important microorganisms impairs their use in agriculture and adoption by farmers. The focal theme of this book is to highlight the potential of employing biosynthesized secondary metabolites (SMs) from agriculturally important microorganisms for management of notorious phytopathogens, as a substitute of the currently available whole organism formulations and also as alternatives to hazardous synthetic pesticides. Accordingly, we have incorporated a comprehensive rundown of sections which particularly examine the SMs synthesized, secreted and induced by various agriculturally important microorganisms and their applications in agriculture. Section 1 includes discussion on biosynthesized antimicrobial secondary metabolites from fungal biocontrol agents. This section will cover the various issues such as development of formulation of secondary metabolites, genomic basis of metabolic diversity, metabolomic profiling of fungal biocontrol agents, novel classes of antimicrobial peptides. The section 1 will also cover the role of these secondary metabolites in antagonist-host interaction and application of biosynthesized antimicrobial secondary metabolites for management of plant diseases. Section 2 will discuss the biosynthesized secondary metabolites from bacterial PGPRs, strain dependent effects on plant metabolome profile, bio-prospecting various isolates of bacterial PGPRs for potential secondary metabolites and non-target effects of PGPR on microbial community structure and functions. Section 3 encompasses synthesis of antimicrobial secondary metabolites from beneficial endophytes, bio-prospecting medicinal and aromatic hosts and effect of endophytic SMs on plants under biotic and biotic stress conditions. © Springer Nature Singapore Pte Ltd. 2019.