Jul 2026· Plant physiology and biochemistry : PPB· Vol 238, pp.
111597
· 0 citations· 72 references
Medicine
TL;DR
GvB constitutes a next-generation biostimulant capable of improving physiological and defence processes in tomato plants, increasing their tolerance to abiotic stress.
Abstract
Tomato is the third most produced crop in the world, with Spain being the ninth largest producer worldwide. However, its production, as well as that of many other crop species, is being threatened by edaphoclimatic pressure resulting from climate change, especially rising temperatures and soil salinization. The use of plant biostimulants, especially those derived from higher plants (hPDBs), is gaining ground as an approach to improve crop performance and yield in plants growing in adverse conditions. In this research, a biostimulant derived from elicited grapevine cell cultures, grapevine biostimulant (GvB), has been evaluated regarding its effect on improving the growth of tomato plants, as well as the mechanisms of action that strengthen their tolerance to salt and heat stress. The results demonstrated an improvement in water relations and photosynthetic processes, the assimilation of elements and molecules essential for mineral nutrition, as well as a promotion of molecular defence mechanisms in tomato plants, especially when subjected to stress conditions. Therefore, GvB constitutes a next-generation biostimulant capable of improving physiological and defence processes in tomato plants, increasing their tolerance to abiotic stress.
Global food security is increasingly threatened by abiotic stresses, particularly waterlogging, which poses significant challenges to cereal crop production. Waterlogging is one of the primary abiotic stresses that significantly influence the interrelationships among plant physiology, growth, and yield. This review aims to examine the relationships among these three aspects in cereal crops, with an emphasis on the response mechanisms to waterlogging stress. Findings from the reviewed literature indicate that waterlogged conditions induce hypoxia in the root zone, leading to reduced photosynthetic rates, impaired nutrient uptake, and increased production of reactive oxygen species (ROS), which trigger cellular damage. These effects result in reduced plant growth and yield. Nevertheless, plants exhibit various adaptive mechanisms, such as aerenchyma formation, adventitious root development, and proline accumulation, which enhance tolerance to stress. Variations in tolerance levels among cereal species also influence the extent of yield reduction. Overall, improving plant tolerance to waterlogging stress requires an integrated approach through physiological understanding, genetic improvement, and the application of appropriate agronomic management.
Erlinda Diantini, Hidya Nurlita, Aep Wawan Irwan et al.· Gunung Djati Conference Seri...· 0 citations
Climate change has escalated the frequency of abiotic stresses such as heat,
drought, salinity, and heavy metal toxicity, which adversely affect the productivity of horticultural
crops and food security. Mangrove ecosystems are home to the Plant Growth-Promoting Rhizobacteria
(PGPR) that are specially adapted to survive even in the most extreme environmental conditions.
These PGPRs from mangroves are an eco-friendly way to raise the stress tolerance level of horticultural
crops.
The paper reviews current research on the functional traits of PGPR derived from mangroves,
including nutrient solubilization, phytohormone production, ACC deaminase activity, and
production of metabolites that aid stress alleviation. The paper also highlights recent advancements
in molecular “omics” tools–genomics, transcriptomics, proteomics, and metabolomics–used for elucidating
the interaction mechanisms between PGPR and plants. The study was primarily focused on
experiments performed in the lab and greenhouse. Field research is also gaining traction.
Mangrove PGPR employ various mechanisms for stress release, including nitrogen fixation,
siderophore production, EPS synthesis, osmoprotection, and antioxidant enzyme induction. Application
of such PGPR has improved the drought and salinity tolerance of horticultural crops such as
tomato, cucumber, banana, and their close relatives. Omics-based studies unravel the complexity of
the regulatory network that controls both stress signaling and nutritional uptake.
Although the laboratory results are good, a problem remains in open fields due to environmental
variability and crop-specific responses. To ensure reliable performance, PGPR consortia
need optimization of strategy formulation and delivery systems.
Mangrove-associated PGPRs are a promising approach to improve climate change resilience
in horticultural crops. Much work still remains to be done on large-scale field trials, advanced
bioformulations, and deployment of current biotechnology approaches before general agricultural
benefits can be realized.
Suman Mandal, Debasmita Paul, Anushka Sasmal et al.· Current Journal of Microbiol...· 0 citations
Abiotic stresses such as drought, salinity, extreme temperatures (cold, hot), heavy metal toxicity, flooding, pollutants, and nutrient imbalances are emerging as major threats to global agri-food and nutritional security, significantly constraining crop productivity and resilience. Nowadays, the situation has deteriorated owing to the accelerated and profound alterations in global climatic patterns. It is utmost need to understand and find out the various adaptive and alleviative practices to reduce the impact, in which plant growth promoting rhizobacteria (PGPR) have the ability to assuage the negative impact of the various stresses and enhanced seed spices productivity and profitability. The interface between PGPR and crops under various stresses are positive worldwide. PGPR play a significant role in enhancing nutrient availability in the soil–plant–microbe system. Additionally, PGPR help lower ethylene levels, increase the concentration of osmolytes, and defend crops from oxidative injure under a diversity of environmental multiple stresses. The application of PGPR to seed spice crops represents a promising strategy to enhance productivity and improve plant resilience under various stress conditions. This review highlights the role of PGPR in mitigating abiotic stresses in seed spice crops and underscores the need for future research to develop effective, long-lasting microbial formulations that support sustainable cultivation under multiple stress conditions.
H. Parewa, V. Meena, Ramniwas Choudhary et al.· Discover Soil· 0 citations
Biostimulants are able to increase tolerance to water and salt stress and help enhance the absorption of nutrients from the soil, in addition to increasing the extension of roots, they are also effective in the synthesis of plant hormones (such auxins, gibberellins, cytokinins) and in the capacity to make insoluble phosphorus in the soil available to plants, minimizing the effects of biotic and abiotic stresses. The objective of this study was to evaluate the phytotechnical and physiological responses of maize subjected to two water regimes and a biostimulant containing mycorrhizae and rhizobacteria of the genus Bacillus spp., through the characterization of the antioxidant response conditioned by this association. The experiment was set up in a 5x2 factorial scheme, with five treatments related to the doses of biostimulant [negative control; 0.250 kg ha-1; 0.500 kg ha-1; 0.750 kg ha-1 and 1 kg ha-1] and two water availability levels (60% and 100% of field capacity), with four replicates, totaling 40 pots. The following growth parameters were analyzed at 15 and 30 days after planting: plant height, stem diameter, number of leaves, root length and root volume, as well as the following biochemical parameters: lipid peroxidation, total peroxidase and catalase of leaf and root. The biostimulant promoted an increase in the growth of the aerial part and root system of corn plants, in addition to an adjustment of antioxidant enzymes, indicating that, up to 30 days after planting (DAP), corn plants show better adaptability to the water regime with 60% of field capacity.
Ana Thaila Rodrigues Felix, Alessandro Carlos Mesquita, Filipe de Amorim Fonseca Moura et al.· Scientia Plena· 0 citations
The economic and environmental pressures associated with greenhouse heating for warm-season vegetable transplant production have prompted a search for biologically driven, cost-effective alternatives. This study investigates the potential of exogenously applied salicylic acid (SA), a phenolic phytohormone known for its stress-mitigating properties, to reduce energy consumption by enhancing seedling cold tolerance. Tomato seedlings (Solanum lycopersicum cv. Rutgers) were subjected to three concentrations of foliar-applied SA (0, 75, and 150 mg/L) and grown under two temperature regimes 16°C and 25°C, in growth chambers. Transplant morphological parameters, including shoot and root biomass, stem thickness, leaf development, and root system architecture, were analyzed over a 49-day growth cycle. At 16°C, application of 75 mg/L SA significantly enhanced seedling vigor, with shoot fresh weight, stem diameter, and leaf area comparable to those grown at standard commercial conditions of 25°C without SA. SA-treated seedlings exhibited enhanced root biomass and surface area, indicating improved cold tolerance. Importantly, energy modeling indicated that reducing the heating setpoint from 25°C to 16°C could lower heating energy requirements by approximately 45%, a savings enabled by the physiological benefits of SA. These findings underscore the dual role of SA as both a growth regulator and an abiotic stress mitigator, suggesting that targeted SA application could transform transplant production by reducing reliance on costly supplemental heating. This represents a novel integration of plant physiological intervention into sustainable energy management practices in horticulture.
J. Javanmardi, Jorge M Vivanco· Advances in Horticultural Sc...· 0 citations
Overall, biostimulants show strong potential to improve abiotic stress resilience in horticultural crops, but broader adoption is constrained by variable efficacy, limited mechanistic validation, and inconsistent regulatory frameworks.
Awais Ali, M. N. E. A. Khan, Nishma Dhakal et al.· International Journal of Pla...· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
