Biostimulant Effect of Four Moroccan Seaweed Extracts Applied as Seed Treatment and Foliar Spray on Maize

Fayzi, Lahbib; Dayan, M. P.; Cherifi, Ouafa; B, El Houssine; Chérifi, Khalil

doi:10.3923/ajps.2020.419.428

Cited by 14 publications

(8 citation statements)

References 39 publications

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“…Another significant observation was the remarkable increase in pigments (chlorophylls and carotenoids). These results are consistent with previous studies on the effect of biostimulants on both monocot and dicot plants [5,41,47,51,[82][83][84].…”

Section: Discussionsupporting

confidence: 93%

“…There is a need for novel agricultural methods that promote sustainable use of natural resources, such as salty water, and allow reclamation of polluted lands. Biostimulants from seaweeds [2][3][4][5][6][7][8][9], plants [10][11][12] and microorganisms (monocultures and co-cultures) [13][14][15][16][17][18] have been found to improve plant growth and yield in several plant species under normal as well as stressful conditions.…”

Section: Introductionmentioning

confidence: 99%

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Strain-Specific Biostimulant Effects of Chlorella and Chlamydomonas Green Microalgae on Medicago truncatula

Gitau

Farkas

Balla

et al. 2021

Plants

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Microalgae have been identified to produce a plethora of bioactive compounds exerting growth stimulating effects on plants. The objective of this study was to investigate the plant-growth-promoting effects of three selected strains of eukaryotic green microalgae. The biostimulatory effects of two Chlorella species (MACC-360 and MACC-38) and a Chlamydomonas reinhardtii strain (cc124) were investigated in a Medicago truncatula model plant grown under controlled greenhouse conditions. The physiological responses of the M. truncatula A17 ecotype to algal biomass addition were characterized thoroughly. The plants were cultivated in pots containing a mixture of vermiculite and soil (1:3) layered with clay at the bottom. The application of live algae cells using the soil drench method significantly increased the plants’ shoot length, leaf size, fresh weight, number of flowers and pigment content. For most of the parameters analyzed, the effects of treatment proved to be specific for the applied algae strains. Overall, Chlorella application led to more robust plants with increased fresh biomass, bigger leaves and more flowers/pods compared to the control and Chlamydomonas-treated samples receiving identical total nutrients.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Strain-Specific Biostimulant Effects of Chlorella and Chlamydomonas Green Microalgae on Medicago truncatula

Gitau

Farkas

Balla

et al. 2021

Plants

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“…Weekly foliar application of pot-grown maize seedlings with seaweed extracts for 90 days were reported to have a significant effect on the plant diameter and resulted in an increase in plant length by an average of 43% in comparison to control seedlings [65]. It was reported that during growth, plants accumulate sugars, phytohormones, coumaroyl-and feruloyl-related metabolites in the roots, whereas, when stressed, regulatory and defense-related metabolites, such as antioxidants, abscisic acid, coumaroyl-and feruloyl-related metabolites, may be synthesized or act in specific plant tissues [66,67]. Thus, the observed increase in coumaroylquinic acid levels in the foliar application seaweed-based biostimulant treated plants under drought stress (Figure S5B, Supplementary Materials), may be related to the increase in the plant's height and diameter.…”

Section: Impacted Biological Pathways and Changes In Plant Height And...mentioning

confidence: 99%

Computational Metabolomics Tools Reveal Metabolic Reconfigurations Underlying the Effects of Biostimulant Seaweed Extracts on Maize Plants under Drought Stress Conditions

et al. 2022

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Drought is one of the major abiotic stresses causing severe damage and losses in economically important crops worldwide. Drought decreases the plant water status, leading to a disruptive metabolic reprogramming that negatively affects plant growth and yield. Seaweed extract-based biostimulants show potential as a sustainable strategy for improved crop health and stress resilience. However, cellular, biochemical, and molecular mechanisms governing the agronomically observed benefits of the seaweed extracts on plants are still poorly understood. In this study, a liquid chromatography–mass spectrometry-based untargeted metabolomics approach combined with computational metabolomics strategies was applied to unravel the molecular ‘stamps’ that define the effects of seaweed extracts on greenhouse-grown maize (Zea mays) under drought conditions. We applied mass spectral networking, substructure discovery, chemometrics, and metabolic pathway analyses to mine and interpret the generated mass spectral data. The results showed that the application of seaweed extracts induced alterations in the different pathways of primary and secondary metabolism, such as phenylpropanoid, flavonoid biosynthesis, fatty acid metabolism, and amino acids pathways. These metabolic changes involved increasing levels of phenylalanine, tryptophan, coumaroylquinic acid, and linolenic acid metabolites. These metabolic alterations are known to define some of the various biochemical and physiological events that lead to enhanced drought resistance traits. The latter include root growth, alleviation of oxidative stress, improved water, and nutrient uptake. Moreover, this study demonstrates the use of molecular networking in annotating maize metabolome. Furthermore, the results reveal that seaweed extract-based biostimulants induced a remodeling of maize metabolism, subsequently readjusting the plant towards stress alleviation, for example, by increasing the plant height and diameter through foliar application. Such insights add to ongoing efforts in elucidating the modes of action of biostimulants, such as seaweed extracts. Altogether, our study contributes to the fundamental scientific knowledge that is necessary for the development of a biostimulants industry aiming for a sustainable food security.

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“…The absorbed light energy used as the form of heat dissipation decreased and more energy was involved in the photosynthesis of quinoa (Figure 4f). The improvement of photosynthetic activity may be due to the increased availability of soil nutrients that were supplied by algal cell, especially nitrogen and phosphorus that are the fundamental component of chlorophyll forming and important participant in the metabolic process of photosynthesis (Fayzi et al, 2020; Puglisi et al, 2020). In addition, this result might also be explained by the decrease in the degradation of pigment molecule, caused by cytokinins and betaines present in algal cell or excretion, and the reduction of oxidative and osmotic stresses (Kapoore et al, 2021; Lee & Ryu, 2021).…”

Section: Discussionmentioning

confidence: 99%

Saline‐alkali land amendment and value development: Microalgal biofertilizer for efficient production of a halophytic crop ‐ Chenopodium quinoa

et al. 2022

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Saline-alkali land amendment and value development should be conducted simultaneously, and microalgal biofertilizer may provide an efficient solution. Here, a salinealkali tolerant algae was selected and applied to saline-alkali land to reveal its effects on land amendment and quinoa production. The results showed that Chlorella pyrenoidosa showed best growth and photosynthetic characteristics with increasing salinealkali stress. Whether planting quinoa (Chenopodium quinoa Longli No. 1) or not, the application of C. pyrenoidosa supplied soil available nutrients, held water retention,

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Biostimulant Effect of Four Moroccan Seaweed Extracts Applied as Seed Treatment and Foliar Spray on Maize

Cited by 14 publications

References 39 publications

Strain-Specific Biostimulant Effects of Chlorella and Chlamydomonas Green Microalgae on Medicago truncatula

Strain-Specific Biostimulant Effects of Chlorella and Chlamydomonas Green Microalgae on Medicago truncatula

Computational Metabolomics Tools Reveal Metabolic Reconfigurations Underlying the Effects of Biostimulant Seaweed Extracts on Maize Plants under Drought Stress Conditions

Saline‐alkali land amendment and value development: Microalgal biofertilizer for efficient production of a halophytic crop ‐ Chenopodium quinoa

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