Plant Biostimulants Increase the Agronomic Performance of Lavandin (Lavandula x intermedia) in Northern Apennine Range

Caccialupi, Giovanni; Caradonia, Federica; Ronga, Domenico; Hassine, Mortadha Ben; Truzzi, Eleonora; Benvenuti, Stefania; Francia, Enrico

doi:10.3390/agronomy12092189

Cited by 3 publications

(1 citation statement)

References 68 publications

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“…These results are in disagreement with that found in Lantana camara, Abelia x grandiflora [42] and Cornus alba 'Aurea' and 'Elegantissima' [94]. Our preliminary results (Tables 6 and 8) disagree with Ratore et al [95], Kocira et al [96], Gajc-Wolska et al [60] and Caccialupi et al [97] who obtained a positive effect, by applying seaweed extracts, on plant growth, development and yield. Our results agree with Francke et al [41], who exhibited a lower yield of shallots than that of the control (4%) by applying Goteo biostimulant.…”

Section: Discussioncontrasting

confidence: 89%

Different Responses to Adventitious Rhizogenesis under Indole-3-Butyric Acid and Seaweed Extracts in Ornamental’s Cuttings: First Results in Photinia x fraseri ‘Red Robin’

et al. 2023

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Fraser’s photinia ‘Red Robin’ (Photinia x fraseri Dress, Rosaceae family) is an important primary ornamental landscaping species with optimal hedge or screen effects and low maintenance, but it is difficult to root when propagated by cuttings, although high concentrations of phytohormones are used to optimize rhizogenesis. To our knowledge, there is currently no feasible enhanced method for photinia vegetative propagation through stem cuttings, using seaweed extract-based biostimulants as root promoters. Given the economic importance of the species, this research aims to assess the effects of indole-3-butyric acid (IBA) and seaweed extract-based stimulators on the quality of photinia ‘Red Robin’ cuttings, in terms of rooting indicators and ground and aboveground agronomic features. The treatments applied were different concentrations of commercial rooting stimulators compared to an untreated control: C0: distilled water; Rhizopon AA: 1% IBA (R1); Kelpak®: 2 mL L−1 (K2); Kelpak®: 3 mL L−1 (K3); Goteo®: 2 mL L−1 (G2); Goteo®: 3 mL L−1 (G3). The first results showed different responses to adventitious rhizogenesis under IBA and both seaweed extract treatments. At 70 DAC (days after cutting), the seaweed extract stimulated the production of over 80% of cuttings with callus; at 240 DAC, the percentage of rooted cuttings treated under R1 was the highest = 34.3%; the worst results were obtained by both biostimulant treatments at the highest doses: K3 = 21.3% and G3 = 20.7%. Furthermore, R1 produced 3.07 roots per cutting, which was 50% higher than the average of all other treatments. The applications of Kelpak® and Goteo® biostimulants, at both concentrations, resulted in an inhibition of root length with values below the untreated control. Rooted cuttings under R1 showed the highest ground (0.35 g) and aboveground (0.47) dry value. Neither seaweed extract, Kelpak® or Goteo®, at different concentrations, improved both the ground and above-ground weights of rooted cutting, compared to the untreated control, indicating that these natural products are not suitable for Fraser’s photinia ‘Red Robin’ propagation using this methodology. The overall quality of cuttings in IBA treatment was the strongest, with 1%, being the optimum concentration. Further research must be conducted to propose effective agronomic protocols by investigating application methods, doses and number of applications, and to clarify the biochemical and molecular mechanisms of action of these seaweed extracts.

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Section: Discussioncontrasting

confidence: 89%

Different Responses to Adventitious Rhizogenesis under Indole-3-Butyric Acid and Seaweed Extracts in Ornamental’s Cuttings: First Results in Photinia x fraseri ‘Red Robin’

et al. 2023

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Impacts of plant growth-promoting bacteria, compost and biodynamic compost preparations for alleviating the harmful effects of salinity on essential oil characteristics of lavender

Khatami,

Kasraie,

Oveysi

et al. 2023

Chem. Biol. Technol. Agric.

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Background Biodynamic agriculture and the use of plant growth-promoting bacteria (PGPBs) have been demonstrated to offer various benefits for achieving agricultural sustainability. The aim of this study was to evaluate the effects of PGPBs Azotobacter and Azospirillum, compost, and compost with biodynamic preparations (BD) on the essential oil (EO) characteristics of lavender under salinity stress. Research methods The experiment was carried out in a greenhouse for 2 years and involved three factors: four PGPBs, three types of compost, and three levels of salinity stress. Results The results indicated that the essential oil (EO) characteristics increased with 50 mM NaCl but decreased with 100 mM NaCl. Salt stress reduced the cell membrane stability (CMS) and auxin content, while increasing proline contents. However, the application of PGPBs, compost, and compost with biodynamic preparations had an opposite effect on CMS, auxin, and proline parameters compared to salt stress. Based on the results, the treatment that combined compost + BD with Azotobacter was found to be the most effective in enhancing the EO characteristics under both mild and severe salinity stress conditions. Conclusions The results of this study suggest that compost, biodynamic compost preparations, and PGPBs could be useful in enhancing the EO in medicinal plants and alleviating the adverse effects of salt stress on plants. Graphical Abstract

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Improving Okra Performance: Biostimulants and Their Influence on Yield, Quality, Physiology, and Nutrient Composition

Raza,

Rehim,

Bashir

et al. 2024

Preprint

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Plant Biostimulants Increase the Agronomic Performance of Lavandin (Lavandula x intermedia) in Northern Apennine Range

Cited by 3 publications

References 68 publications

Different Responses to Adventitious Rhizogenesis under Indole-3-Butyric Acid and Seaweed Extracts in Ornamental’s Cuttings: First Results in Photinia x fraseri ‘Red Robin’

Different Responses to Adventitious Rhizogenesis under Indole-3-Butyric Acid and Seaweed Extracts in Ornamental’s Cuttings: First Results in Photinia x fraseri ‘Red Robin’

Impacts of plant growth-promoting bacteria, compost and biodynamic compost preparations for alleviating the harmful effects of salinity on essential oil characteristics of lavender

Improving Okra Performance: Biostimulants and Their Influence on Yield, Quality, Physiology, and Nutrient Composition

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