Biostimulants and Their Role in Improving Plant Growth under Abiotic Stresses

Vasconcelos, Alessandra Carvalho de; Chaves, Lúcia Helena Garófalo

doi:10.5772/intechopen.88829

Cited by 35 publications

(32 citation statements)

References 46 publications

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“…On the other hand, citrus greening was also reduced by a reduction of the pest Diaphorina citri upon treatment with extracts of Caulerpa sertularioides , Laurencia johnstonii and Sargassum horridum [ 51 ]. Additionally, seaweed extracts were able to significantly reduce infestation caused by borers, aphids, and thrips in sugarcane thus preventing great economic loss [ 52 , 53 ]. This reduction in infestation can be due to the antifeedant effects, growth inhibition, and also cytotoxicity on ovarian tissue cells of the pests.…”

Section: Effect Of Seaweed Extracts On Plants’ Tolerance To Bioticmentioning

confidence: 99%

Biostimulant Properties of Seaweed Extracts in Plants: Implications towards Sustainable Crop Production

Alí

Ramsubhag

Jayaraman

2021

Plants

255

157

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The use of seaweed-based bioproducts has been gaining momentum in crop production systems owing to their unique bioactive components and effects. They have phytostimulatory properties that result in increased plant growth and yield parameters in several important crop plants. They have phytoelicitor activity as their components evoke defense responses in plants that contribute to resistance to several pests, diseases, and abiotic stresses including drought, salinity, and cold. This is often linked to the upregulation of important defense-related genes and pathways in the plant system, priming the plant defenses against future attacks. They also evoke phytohormonal responses due to their specific components and interaction with plant growth regulation. Treatment by seaweed extracts and products also causes significant changes in the microbiome components of soil and plant in support of sustainable plant growth. Seaweed extracts contain a plethora of substances which are mostly organic, but trace levels of inorganic nutrient elements are also present. Fractionation of seaweed extracts into their components and their respective bioassays, however, has not yielded favorable growth effects. Only the whole seaweed extracts have been consistently proven to be very effective, which highlights the role of multiple components and their complex interactive effects on plant growth processes. Since seaweed extracts are highly organic, they are ideally suited for organic farming and environmentally sensitive crop production. They are also very compatible with other crop inputs, paving the way for an integrated management approach geared towards sustainability. The current review discusses the growth and functional effects evoked by seaweed extracts and their modes and mechanisms of action in crop plants which are responsible for elicitor and phytostimulatory activities. The review further analyses the potential value of seaweed extracts in integrated crop management systems towards sustainable crop production.

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Section: Effect Of Seaweed Extracts On Plants’ Tolerance To Bioticmentioning

confidence: 99%

Biostimulant Properties of Seaweed Extracts in Plants: Implications towards Sustainable Crop Production

Alí

Ramsubhag

Jayaraman

2021

Plants

255

157

View full text Add to dashboard Cite

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“…Several possible key mechanisms of action induced by biostimulants in relation to abiotic stress alleviation have been elucidated and include ROS scavenging, membrane stability, osmoprotection, stomatal regulation, ion homeostasis, nutrient availability and metal chelation [ 120 ], however, the explicit underlying modes of action responsible for these effects remain largely unknown [ 92 , 121 ].…”

Section: Microbial Biostimulants and Enhancement Of Plant Responses To Abiotic Stressesmentioning

confidence: 99%

Plant Responses to Abiotic Stresses and Rhizobacterial Biostimulants: Metabolomics and Epigenetics Perspectives

et al. 2021

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In response to abiotic stresses, plants mount comprehensive stress-specific responses which mediate signal transduction cascades, transcription of relevant responsive genes and the accumulation of numerous different stress-specific transcripts and metabolites, as well as coordinated stress-specific biochemical and physiological readjustments. These natural mechanisms employed by plants are however not always sufficient to ensure plant survival under abiotic stress conditions. Biostimulants such as plant growth-promoting rhizobacteria (PGPR) formulation are emerging as novel strategies for improving crop quality, yield and resilience against adverse environmental conditions. However, to successfully formulate these microbial-based biostimulants and design efficient application programs, the understanding of molecular and physiological mechanisms that govern biostimulant-plant interactions is imperatively required. Systems biology approaches, such as metabolomics, can unravel insights on the complex network of plant-PGPR interactions allowing for the identification of molecular targets responsible for improved growth and crop quality. Thus, this review highlights the current models on plant defence responses to abiotic stresses, from perception to the activation of cellular and molecular events. It further highlights the current knowledge on the application of microbial biostimulants and the use of epigenetics and metabolomics approaches to elucidate mechanisms of action of microbial biostimulants.

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“…Biostimulants are products that reduce the requirement of fertilizers and increase plant growth; increase resistance to water and abiotic stresses; favor good performance of the plant's vital processes; enable high yields and good-quality products; and enhance nutrition efficiency and plant quality traits, regardless of its nutrient contents [22]. Research confirms the positive effect of biostimulants, including algae preparations, used in plant cultivation and propagation [7,23,24].…”

Section: Introductionmentioning

confidence: 84%

Effect of Phenological Stage and Rooting Enhancers on Physiological Parameters in Stem Cuttings in the Process of Rhizogenesis of Rosa × alba ‘Maiden’s Blush’

2020

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Once-blooming roses belong to difficult-to-root. One-bud leafy cuttings have limited storage capacity, due to the small size of the stem, and are exposed to prolonged stress conditions. The objective of this study was to examine if the treatment of the cuttings of Rosa × alba ‘Maiden’s Blush’ with plant origin preparations as rooting enhancers may increase their rooting percentage, chlorophyll a/b, and proteins concentration in leaves. The cuttings were prepared from shoots in four phenological stages: flower buds closed, flowers open, immediately after petal shedding, and 7–14 days after petal fall. The following were used: 0.4% indole butyric acid (Ukorzeniacz Aaqua), 0.2% naphthalene acetic acid (Ukorzeniacz Baqua), Bio Rhizotonic; Root Juice™, and Bio Roots. Controls included untreated cuttings. The highest rooting percentage was obtained after two treatments with 0.6% Bio Rhizotonic (81.5%), compared to the control (55.0%), using cuttings from shoots with flower buds closed, but the rooting enhancers did not show any unequivocal impact on rooting percentage in cuttings of all phenological stages or affected improvement this feature in cuttings harvested 7–14 after shedding petals with low root ability. However, the action of plant preparations affected positively higher soluble proteins and chlorophyll content. The plant-origin preparations can be used as alternatives to chemicals in nursery production.

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Biostimulants and Their Role in Improving Plant Growth under Abiotic Stresses

Cited by 35 publications

References 46 publications

Biostimulant Properties of Seaweed Extracts in Plants: Implications towards Sustainable Crop Production

Biostimulant Properties of Seaweed Extracts in Plants: Implications towards Sustainable Crop Production

Plant Responses to Abiotic Stresses and Rhizobacterial Biostimulants: Metabolomics and Epigenetics Perspectives

Effect of Phenological Stage and Rooting Enhancers on Physiological Parameters in Stem Cuttings in the Process of Rhizogenesis of Rosa × alba ‘Maiden’s Blush’

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