Enhancing plant productivity and sustainability under diverse plant-environment interactions

Enhancing plant productivity and sustainability necessitates a holistic understanding of multitrophic plant-environment interactions. Plants function as meta-organisms (holobionts), intimately linked with diverse microbial communities, soil biota, and insects, forming complex networks that govern ecosystem functioning and plant resilience. This review synthesizes current knowledge on five critical dimensions: (I) the structural diversity and functional roles of plant-associated microbial communities (rhizosphere, phyllosphere, endosphere) in nutrient cycling, stress tolerance, and pathogen suppression; (II) soil health as a dynamic nexus, integrating physical, chemical, and biological properties modulated by microbial activity; (III) the dualistic nature of insect-plant relationships, encompassing herbivory, pollination, seed dispersal, and biological control; (IV) the profound impacts of climate change and biodiversity loss on species distributions, interaction dynamics, and ecosystem stability; and (V) emergent cross-system synergies arising from microbe-insect-plant-soil feedback loops. We highlight the molecular mechanisms underpinning these interactions, including plant immune signaling, symbiotic communication via root exudates and volatiles, and the mediating role of microbiomes. Anthropogenic pressures (agricultural intensification, pollution, land-use change) disrupt these finely tuned systems, reducing microbial diversity, altering soil function, and destabilizing ecological balances. A deeper mechanistic understanding of these interconnected networks is imperative for developing innovative strategies, such as microbiome engineering, biodiversity conservation, precision agriculture, and nano-hybrid applications, to enhance stress resistance, optimize resource use, and foster sustainable agricultural and ecosystem resilience in the face of global environmental challenges.