Portraying the Phytomicrobiome Studies during Abiotic stresses: Revisiting the past and exploring the future outcomes

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Background

Plants are under the exposure of adverse climatic conditions such as heavy metals, drought, flooding, nutrient deficiency, temperature and saline stress. These adversities dilapidate the agro-ecosystem, that in turn affect the food productivity and supplies. The plants get deteriorated in the form of impaired metabolic signaling networks, growth, development, productivity and yield. Henceforth, it is the need of the hour to opt for novel strategies for abiotic stress mitigation along with the effective understanding of plant resistance mechanisms.
Plants recruit microflora that affect nutrient uptake and stress responses. The changing environment affect the microbial communities and their functions along with the plant responses. Unsnarling the microbial responses to adverse environmental conditions will provide us to gain a novel asset for enhancing stress resistance. Microbes protect plant growth by acting as bio-protectants, bio-fertilizers/pesticides, phyto-stimulators and trigger systemic resistance, and hormonal signaling networks in plants. We aim to discover the microbial-mediated adaptation to abiotic stresses accompanied by dynamic cross-talk with various molecular, cellular and physiological regulatory networks.

The microbial communities in the vicinity of plants is collectively called as phytomicrobiome. Plants are however associated with diverse microbial populations such as bacteria, fungi, archea and actinobacteria and constitute a complete holobiont. Although, the constitution of plant microbiome is greatly influenced by their genotype, lifecycle, stage, soil architecture, physical, climatic and edaphic factors and several abiotic stressors. The microbial niche is influenced by the abiotic stressed conditions namely, salinity, heavy metals, drought, temperature, flooding etc. The microbial associations within rhizosphere, rhizoplane and endospheres mediate several morphological and biochemical alterations in the plants to alleviate abiotic stresses via induced systemic resistance mechanisms. One of the common most and unique relationship of phytomicrobiome signaling within plants is of rhizobia-legume symbiotic relation, plant-mycorrhizal relation and occurrence of many growth promoting rhizobacterial species in the plant proximity. These beneficial microbes associated with the rhizosphere synthesise many useful metabolites and generate signals for stress mitigation along with improving plant growth. Various signaling mechanisms like phytohormonal signaling and hormonal crosstalk form crossroads for the phytomicrobiome studies. Along with this, many omics based studies comprising of genomics, proteomics, secretomics, transcriptomics, glycomics, phenomics and interactomics are paving new insights to explore the novel studies associated with plant microbiome and their interactions.

This research topic aims to publish articles on the role of microbial communities in abiotic stress tolerance in plants. Moreover, this topic welcomes the insights for mechanisms underlying plant-microbe interactions and their positive symbiosis during stressed conditions. This topic will attempt to focus on role of microbes towards sustainability and will include the recent trends for its practical applicability into the field. We encourage the submission of manuscripts that untangles molecular and cellular responses including gene transcripts, proteins, metabolites and various signaling molecules involved in this network. Our main aim is to dissect the phytomicrobiome during adverse environment that mainly encompasses both primary as well as secondary effects. Unravelling the environmental disturbances during phytomicrobiome research is a critical aspect. We aim to discover and decipher the effects of abiotic stresses in plants by microbiome for stress resistance. Original research articles depicting the phytomicrobiome studies in response to abiotic stresses are invited on the topics including, but not limited to:

• Plant growth during abiotic stress factors such as heavy metals, drought, salinity, temperature etc.
• Microbe mediated abiotic stress tolerance.
• Phytomicrobiome signaling in plants.
• Phytohormonal crosstalk during abiotic stress tolerance.
• Microbes as bio-inoculants, biofertilizers and biopesticides.
• Crosstalk among plant and microbial secretomics.
• Gene profiling and proteome based approaches.
• Metabolite profiling during plant-microbe interactions under abiotic stress.
• Omics-based approaches for understanding microbe-mediated stress tolerance.
• Soil-Plant-Microbes Interactions: Connecting different kingdoms.
• Rhizobia-legume biosynthesis during abiotic stress.
• Arbuscular fungi and plant interactions during abiotic stresses.
• Commercial application of microbes for abiotic stress tolerance.

Keywords: phytomicrobiome, abiotic stresses, rhizosphere, signaling, symbiosis, molecular studies, phytohormones, crosstalk, omics

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