| Title: | Foliar application of protein hydrolysates promotes growth and affects leaf ionome in olive |
|---|
| Authors: | ID Pasković, Igor (Author)
ID Andlovic, Maša (Author)
ID Plešnik, Helena, Institut "Jožef Stefan" (Author)
ID Vavpetič, Primož, Institut "Jožef Stefan" (Author)
ID Žurga, Paula (Author)
ID Šala, Martin (Author)
ID Polić Pasković, Marija (Author)
ID Kosjek, Tina, Institut "Jožef Stefan" (Author)
ID Pongrac, Paula, Institut "Jožef Stefan" (Author) |
|---|
| Files: |  URL - Source URL, visit https://www.mdpi.com/2311-7524/12/2/151
 PDF - Presentation file, download (2,71 MB)
MD5: 570D674EE446256656690D3C51DF414D
|
|---|
| Language: | English |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: |  IJS - Jožef Stefan Institute
|
|---|
| Abstract: | The foliar application of various biostimulants, such as protein hydrolysates (PHs), has been associated with improved nutrient uptake efficiency and stress tolerance in perennial crops, like olive (Olea europaea L.). In this study, PHs obtained by enzymatic hydrolysis by Alcalase Pure (referred to as treatment H1), Alcalase Pure and Flavourzyme (referred to as treatment H2), or Alcalase Pure and Protana™ Prime (referred to as treatment H3) with proteins from pumpkin seed cake were tested for their potential beneficial growth, performance, and nutrition effects in one-year-old olive seedlings grown under controlled conditions. Amino acid and element compositions were evaluated in the PHs, which were used for foliar application six times at eight-day intervals. Control (C) plants were treated the same way, but without PHs. Shoot and root growth, leaf reflectance indices, and the composition of micro and macronutrients in different organs and leaf tissues were determined. Plants in the H2 treatment grew significantly better than C plants. They had the highest Photochemical Reflectance Index and a Chlorophyll-Normalized Difference Vegetation Index similar to that of C plants, indicating an optimal growth/photosynthesis balance. A decrease in the concentration of several mineral elements in the lower epidermis in H2- and H3-treated plants compared to C and H1-treated plants was accompanied by their increase in the spongy mesophyll, indicating their redistribution to support increased metabolism, resulting in increased shoot growth in these two treatments. Arguably, these observed effects could be attributed to the amino acid profile of the H2 mixture, which had the highest concentration of L-proline, L-arginine, and L-lysine among the three PH mixtures, and a higher L-asparagine concentration than the H1 mixture. Overall, the results highlight the applicative potential of tailored PH formulations for the optimization of growth, mineral element composition, and physiological performance in olive cultivation. |
|---|
| Keywords: | hydrolyzed proteins, pumpkin cake, biostimulants, element localization, olive cultivation, olive leaves |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Submitted for review: | 03.12.2025 |
|---|
| Article acceptance date: | 27.01.2026 |
|---|
| Publication date: | 29.01.2026 |
|---|
| Publisher: | MDPI |
|---|
| Year of publishing: | 2026 |
|---|
| Number of pages: | str. 1-20 |
|---|
| Numbering: | Vol. 12, iss. 12, [article no.] 151 |
|---|
| Source: | Švica |
|---|
| PID: | 20.500.12556/DiRROS-27401  |
|---|
| UDC: | 634.1/.7 |
|---|
| ISSN on article: | 2311-7524 |
|---|
| DOI: | 10.3390/horticulturae12020151 |
|---|
| COBISS.SI-ID: | 267338243 |
|---|
| Copyright: | © 2026 by the authors. |
|---|
| Note: | Nasl. z nasl. zaslona;
Soavtorji iz Slovenije: Maša Andlovic, Helena Plešnik, Primož Vavpetič, Martin Šala, Tina Kosjek, Paula Pongrac;
Opis vira z dne 4. 2. 2026;
|
|---|
| Publication date in DiRROS: | 05.02.2026 |
|---|
| Views: | 56 |
|---|
| Downloads: | 26 |
|---|
| Metadata: |    |
|---|
|
:
|
Copy citation |
|---|
| | | | Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
