Efecto del peróxido de hidrógeno en la expresión de proteínas durante la germinación

Comunicaciones a congreso

Cambios inducidos por Plum pox virus en el proteoma de plantas de melocotonero

Comunicaciones a congreso

Salts and nutrients present in regenerated waters induce changes in water relations, antioxidative metabolism, ion accumulation and restricted ion uptake in Myrtus communis L. plants

The use of reclaimed water (RW) constitutes a valuable strategy for the efficient management of water and nutrients in landscaping. However, RW may contain levels of toxic ions, affecting plant production or quality, a very important aspect for ornamental plants. The present paper evaluates the effect of different quality RWs on physiological and biochemical parameters and the recovery capacity in Myrtus communis L. plants. M.communis plants were submitted to 3 irrigation treatments with RW from different sources (22 weeks): RW1 (1.7dSm-1), RW2 (4.0dSm-1) and RW3 (8.0dSm-1) and one control (C, 0.8dSm-1). During a recovery period of 11 weeks, all plants were irrigated with the control water. The RW treatments did not negatively affect plant growth, while RW2 even led to an increase in biomass. After recovery, only plants irrigated with RW3 showed some negative effects on growth, which was related to a decrease in the net photosynthesis rate, higher Na accumulation and a reduction in K levels. An increase in salinity was accompanied by decreases in leaf water potential, relative water content and gas exchange parameters, and increases in Na and Cl uptake. Plants accumulated Na in roots and restricted its translocation to the aerial part. The highest salinity levels produced oxidative stress, as seen from the rise in electrolyte leakage and lipid peroxidation. The use of regenerated water together with carefully managed drainage practices, which avoid the accumulation of salt by the substrate, will provide economic and environmental benefits. © 2014.This work was supported by the Spanish Ministry of Economy and Competitiveness cofinanced by FEDER funds (Project CICYT AGL 2011–30022-C02-01-02) and Fundación Séneca-Agencia de Ciencia y Tecnología de la Región de Murcia (11883/PI/09 and 15356/PI/10).Peer Reviewe

Application of In Vitro plant tissue culture techniques to halophyte species: A review

Halophytes are plants able to thrive in environments characterized by severe abiotic conditions, including high salinity and high light intensity, drought/flooding, and temperature fluctuations. Several species have ethnomedicinal uses, and some are currently explored as sources of food and cosmetic ingredients. Halophytes are considered important alternative cash crops to be used in sustainable saline production systems, due to their ability to grow in saline conditions where conventional glycophyte crops cannot, such as salt-affected soils and saline irrigation water. In vitro plant tissue culture (PTC) techniques have greatly contributed to industry and agriculture in the last century by exploiting the economic potential of several commercial crop plants. The application of PTC to selected halophyte species can thus contribute for developing innovative production systems and obtaining halophyte-based bioactive products. This work aimed to put together and review for the first time the most relevant information on the application of PTC to halophytes. Several protocols were established for the micropropagation of different species. Various explant types have been used as starting materials (e.g., basal shoots and nodes, cotyledons, epicotyls, inflorescence, internodal segments, leaves, roots, rhizomes, stems, shoot tips, or zygotic embryos), involving different micropropagation techniques (e.g., node culture, direct or indirect shoot neoformation, caulogenesis, somatic embryogenesis, rooting, acclimatization, germplasm conservation and cryopreservation, and callogenesis and cell suspension cultures). In vitro systems were also used to study physiological, biochemical, and molecular processes in halophytes, such as functional and salt-tolerance studies. Thus, the application of PTC to halophytes may be used to improve their controlled multiplication and the selection of desired traits for the in vitro production of plants enriched in nutritional and functional components, as well as for the study of their resistance to salt stress.info:eu-repo/semantics/publishedVersio

Funciones del metabolismo redox en la germinación y la respuesta a estrés salino en plantas de guisante "pisum sativum L." / Gregorio Barba Espín; directores, José Antonio Hernández Cortés, Pedro Díaz Vivancos.

Texto en español e inglés.Tesis-Universidad de Murcia.Consulte la tesis en: BCA. GENERAL. ARCHIVO UNIVERSITARIO. TM 4305

Role of H2O2 in pea seed germination

The imbibition of pea seeds with hydrogen peroxide (H2O2) increased the germination as well as the seedling growth, producing an invigoration of the seeds. We propose that H2O2 could acts as signaling molecule in the beginning of seed germination involving specific changes at proteomic, transcriptomic and hormonal levels. These findings have practical implication in the context of seed priming technologies to invigorate low vigour seeds.This work was supported by Fundación Séneca - Agencia de Ciencia y Tecnología de la Región de Murcia (projects 05571/PI/07 and 11883/PI/09). G.B.-E. thanks CSIC for his JAE research fellowship. P.D.-V. thanks CSIC for his JAEdoc research contractPeer reviewe

Impacts of LEDs in the Red Spectrum on the Germination, Early Seedling Growth and Antioxidant Metabolism of Pea (Pisum sativum L.) and Melon (Cucumis melo L.)

© 2020 by the authors.(1) Background: In recent years, the use of light emitting diodes (LEDs) for plant production purposes has expanded. However, LEDs’ effect on seed germination and early seedling growth has been scarcely documented. (2) Methods: In this work, the effect of monochromatic red light (RL, 100 µmol m−2 s−1) for up to 60 min applied to seeds of pea and melon was analyzed in terms of seedling growth and antioxidant enzymes levels. An experimental LED chamber coupled to an electronic control system was developed for this purpose. (3) Results: RL did not alter the germination rate, but significantly improved the early seedling growth. Pea and melon seedlings showed the highest increase in fresh weight and length upon 15 min RL treatment of the seeds, whereas longer exposure times decreased seedling growth. Interestingly, RL favored the development of secondary roots in both species, which could favor the nutrition and water uptake by the seedling. The ability of the seedlings to respond to a hypothetical LED irradiance-induced oxidative stress was reflected differently on the antioxidant system of pea and melon. (4) Conclusions: These findings can be relevant for designing seed priming treatments to improve plant vigor, thus enhancing the productivity of important crop plants.This research was funded by the “Fundación Séneca”—Agency of Science and Technology of the Region of Murcia, grant number 20405/SF/17.Peer reviewe

Seeds: What Happened in 2023?

As Editor-in-Chief of Seeds, I would like to thank the Authors, Reviewers, Editorial Board Members, Academic Editors, Assistant Editors and all the Staff involved in Seeds for their effort and dedication, which has helped to establish Seeds as a scientific journal in the field of Seed Biology and Technology [...

Antioxidant system: the hub of bud dormancy regulation in Prunus sp.

Global warming, through affecting the dormancy progression of temperate fruit trees, has a profound impact on bud break, flowering and fruiting performance. This may lead to economic losses in the production of the genus Prunus sp., which cultivation is common in temperate regions worldwide, producing edible drupes such as almond, apricot, cherry, plum, peach and nectarines. To overcome climate change-related fruit tree disorders, knowledge on the biochemical mechanisms governing bud dormancy and dormancy release is essential. In this review, we gather knowledge on the understanding of bud dormancy in Prunus. Herewith, the antioxidant system is situated in the hub of a process where metabolic, physiological, biochemical and molecular components are linked in a complex manner. Moreover, the knowledge on the use of oxidative stress-related compounds to regulate dormancy release in Prunus is summarized. Finally, future research directions in this field are outlined

Portable experiment chamber with adjustable spectrum LED lighting and micro programmable control unit

[ES] Cámara de experimentación portátil con iluminación LED de espectro modulable y unidad de control micra programable, caracterizada por que comprende una caja. En su interior va instalada la luminaria LED patrón configurable en función del ensayo a realizar, además lleva instalados un sensor de iluminación (8), un sensor de temperatura y humedad (9), un sensor de radiación fotosintéticamente activo y de radiación ultravioleta (10). La unidad de control micro programable está formada por un microcontrolador arduino (1), un mini ordenador raspberry pi (2) y una interfaz gráfica (3) conectada a los servicios de proveedores de almacenamiento de datos en la nube o cloud (6).[EN] Portable experiment chamber with adjustable spectrum LED lighting and programmable micron control unit, characterized in that it comprises a box. Inside it is installed the configurable standard LED luminaire depending on the test to be carried out, it also has a lighting sensor (8), a temperature and humidity sensor (9), a photosynthetically active radiation sensor and ultraviolet radiation (10). The micro programmable control unit is made up of an arduino microcontroller (1), a raspberry pi mini computer (2) and a graphical interface (3) connected to the services of cloud or cloud data storage providers (6).NoSolano Navarro, Cristóbal JavierU Solicitud de modelo de utilida