Chemical Activators of the Natural Defences of the Plant

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Phytochemistry".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 11635

Special Issue Editor


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Guest Editor
Chemical Plant Defence Activators Group Institute of Natural Products and Agrobiology (IPNA) Spanish National Research Council - CSIC Campus de Anchieta Avenida Astrofísico Francisco Sánchez 3 38206 La Laguna, Tenerife Spain
Interests: chemical plant defence activators; bioactive molecules; induced resistance against biotic stress; induced tolerance against abiotic stress; priming; sustainable agriculture

Special Issue Information

This Special Issue is on Chemical Activators of Natural Defences of the Plant, and their potential applications provide a novel sustainable approach to crop protection. The current state of the art of this technology provides promising bioactive molecules for efficient and long-lasting treatments for crop protection against biotic or abiotic stresses. The aim of this Special Issue is to review and discuss the current knowledge of these bioactive molecules, as well as their different modes of action against biotic or abiotic stresses. A better understanding of the mechanisms underlying their positive effect could lead to novel molecules capable of protecting our crops without yield penalty, thereby contributing to the sustainable agriculture needed for the coming challenges of the 21st century.

Dr. Andres A. Borges
Guest Editor

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Keywords

  • Signalling and defence mechanisms of induced resistance (IR): SAR, ISR, priming induced by chemical activators
  • Costs and benefits associated with IR
  • Epigenetic and metabolomic aspects of IR

Published Papers (3 papers)

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Research

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23 pages, 10347 KiB  
Article
Biostimulants as an Alternative to Improve the Wine Quality from Vitis vinifera (cv. Tempranillo) in La Rioja
by Cristina E. Olavarrieta, Maria Carmen Sampedro, Asier Vallejo, Nikola Štefelová, Ramón J. Barrio and Nuria De Diego
Plants 2022, 11(12), 1594; https://doi.org/10.3390/plants11121594 - 16 Jun 2022
Cited by 3 | Viewed by 2248
Abstract
The application of biostimulants appears to be an environmentally friendly, innovative, and sustainable agronomical tool to mitigate the negative effects induced by adverse climatology in traditional grape-growing regions such as La Rioja (Spain). However, their mechanism of action in grapevines is still unclear. [...] Read more.
The application of biostimulants appears to be an environmentally friendly, innovative, and sustainable agronomical tool to mitigate the negative effects induced by adverse climatology in traditional grape-growing regions such as La Rioja (Spain). However, their mechanism of action in grapevines is still unclear. We evaluated how commercial substances (two from Ascophyllum nodosum extraction and one amino acids-based biostimulant) and the non-proteinogenic amino acid β-aminobutyric acid (BABA) affect the quality and quantity of musts and grapes in Vitis vinifera L. cv. Tempranillo from a semi-arid region of La Rioja during two seasons. We hypothesized an enhancement in organic metabolites in berries and leaves in response to these treatments, changing the organoleptic characteristics of the final products. The treatments altered the primary metabolites such as carbohydrates, organic acids (AcOrg), and free amino acids, first in the leaves as the effect of the foliar application and second in grapes and musts. As the main result, the biostimulant efficiency depended on the climatology and vineyard location to improve the final yield. Whereas biostimulant application enhanced the yield in 2018 (less dry year), it did not help production in 2019 (dry year). BABA was the most efficient biostimulant, enhancing plant production. Regarding yield quality, the biostimulant application improved the musts mainly by enhancing the fumaric acid content and by reducing carbohydrates, except in BABA-treated plants, where they were accumulated. These results corroborate biostimulants as an exciting approach in wine production, especially for improving wine quality. Full article
(This article belongs to the Special Issue Chemical Activators of the Natural Defences of the Plant)
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17 pages, 6299 KiB  
Article
Priming with Small Molecule-Based Biostimulants to Improve Abiotic Stress Tolerance in Arabidopsis thaliana
by Alba E. Hernándiz, Carlos Eduardo Aucique-Perez, Sanja Ćavar Zeljković, Nikola Štefelová, Sara Salcedo Sarmiento, Lukáš Spíchal and Nuria De Diego
Plants 2022, 11(10), 1287; https://doi.org/10.3390/plants11101287 - 11 May 2022
Cited by 6 | Viewed by 2460
Abstract
Biostimulants became a hotspot in the fight to alleviate the consequences of abiotic stresses in crops. Due to their complex nature, it is challenging to obtain stable and reproducible final products and more challenging to define their mechanism of action. As an alternative, [...] Read more.
Biostimulants became a hotspot in the fight to alleviate the consequences of abiotic stresses in crops. Due to their complex nature, it is challenging to obtain stable and reproducible final products and more challenging to define their mechanism of action. As an alternative, small molecule-based biostimulants, such as polyamines have promoted plant growth and improved stress tolerance. However, profound research about their mechanisms of action is still missing. To go further, we tested the effect of putrescine (Put) and its precursor ornithine (Orn) and degradation product 1,3-diaminopropane (DAP) at two different concentrations (0.1 and 1 mM) as a seed priming on in vitro Arabidopsis seedlings grown under optimal growth conditions, osmotic or salt stress. None of the primings affected the growth of the seedlings in optimal conditions but altered the metabolism of the plants. Under stress conditions, almost all primed plants grew better and improved their greenness. Only Orn-primed plants showed different plant responses. Interestingly, the metabolic analysis revealed the implication of the N- acetylornithine and Orn and polyamine conjugation as the leading player regulating growth and development under control and stress conditions. We corroborated polyamines as very powerful small molecule-based biostimulants to alleviate the adverse abiotic stress effects. Full article
(This article belongs to the Special Issue Chemical Activators of the Natural Defences of the Plant)
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Review

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23 pages, 2206 KiB  
Review
A Beginner’s Guide to Osmoprotection by Biostimulants
by David Jiménez-Arias, Francisco J. García-Machado, Sarai Morales-Sierra, Ana L. García-García, Antonio J. Herrera, Francisco Valdés, Juan C. Luis and Andrés A. Borges
Plants 2021, 10(2), 363; https://doi.org/10.3390/plants10020363 - 13 Feb 2021
Cited by 21 | Viewed by 6158
Abstract
Water is indispensable for the life of any organism on Earth. Consequently, osmotic stress due to salinity and drought is the greatest threat to crop productivity. Ongoing climate change includes rising temperatures and less precipitation over large areas of the planet. This is [...] Read more.
Water is indispensable for the life of any organism on Earth. Consequently, osmotic stress due to salinity and drought is the greatest threat to crop productivity. Ongoing climate change includes rising temperatures and less precipitation over large areas of the planet. This is leading to increased vulnerability to the drought conditions that habitually threaten food security in many countries. Such a scenario poses a daunting challenge for scientists: the search for innovative solutions to save water and cultivate under water deficit. A search for formulations including biostimulants capable of improving tolerance to this stress is a promising specific approach. This review updates the most recent state of the art in the field. Full article
(This article belongs to the Special Issue Chemical Activators of the Natural Defences of the Plant)
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