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Journal ArticleDOI

Priming memory invokes seed stress-tolerance

01 Oct 2013-Environmental and Experimental Botany (Elsevier)-Vol. 94, pp 33-45
TL;DR: A hypothetical model illustrating the cellular physiology of priming-induced stress-tolerance is proposed, likely achieved via two strategies: first, seed priming sets in motion germination-related activities that facilitate the transition of quiescent dry seeds into germinating state and lead to improved germination potential, and secondly, priming imposes abiotic stress on seeds that represses radicle protrusion but stimulates stress responses.
About: This article is published in Environmental and Experimental Botany.The article was published on 2013-10-01. It has received 283 citations till now. The article focuses on the topics: Priming (agriculture) & Radicle.
Citations
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Journal ArticleDOI
TL;DR: Promising chemical agents such as sodium nitroprusside, hydrogen peroxide, sodium hydrosulfide, melatonin, and polyamines that can potentially confer enhanced tolerance when plants are exposed to multiple abiotic stresses are reviewed.

430 citations


Cites background from "Priming memory invokes seed stress-..."

  • ...Uniform and efficient seed germination and establishment of early seedlings are crucial components for agricultural crop production under stressful environmental conditions [99]....

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Journal ArticleDOI
Ehab A. Ibrahim1
TL;DR: The aim of this paper is to review the recent literature on the response of plants to seed priming under salinity stress, and the mechanism of the effect of salinity on seed germination is discussed and the Seed priming process is summarized.

389 citations


Cites background from "Priming memory invokes seed stress-..."

  • ...Together, these two strategies make up a 'priming memory' in seeds, which can be recruited upon later stress exposure and it mediates the greater stress tolerance of germinating primed seeds (Bruce et al., 2007; Pastor et al., 2013; Chen and Arora, 2013)....

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  • ...The improved stress tolerance of germinating seeds is a cross-tolerance manifestation induced by seed priming (Chen and Arora, 2013)....

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  • ...The improved stress tolerance of germinating seeds is a cross-tolerance manifestation induced by seed priming (Chen and Arora, 2013)....

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Journal ArticleDOI
TL;DR: Different mechanisms underlying nanopriming-induced seed germination were proposed, including creation of nanopores for enhanced water uptake, rebooting ROS/antioxidant systems in seeds, generation of hydroxyl radicals for cell wall loosening, and nanocatalyst for fastening starch hydrolysis.
Abstract: Application of nanomaterials for agriculture is relatively new as compared to their use in biomedical and industrial sectors. In order to promote sustainable nanoagriculture, biocompatible silver nanoparticles (AgNPs) have been synthesized through green route using kaffir lime leaf extract for use as nanopriming agent for enhancing seed germination of rice aged seeds. Results of various characterization techniques showed the successful formation of AgNPs which were capped with phytochemicals present in the plant extract. Rice aged seeds primed with phytosynthesized AgNPs at 5 and 10 ppm significantly improved germination performance and seedling vigor compared to unprimed control, AgNO3 priming, and conventional hydropriming. Nanopriming could enhance α-amylase activity, resulting in higher soluble sugar content for supporting seedlings growth. Furthermore, nanopriming stimulated the up-regulation of aquaporin genes in germinating seeds. Meanwhile, more ROS production was observed in germinating seeds of nanopriming treatment compared to unprimed control and other priming treatments, suggesting that both ROS and aquaporins play important roles in enhancing seed germination. Different mechanisms underlying nanopriming-induced seed germination were proposed, including creation of nanopores for enhanced water uptake, rebooting ROS/antioxidant systems in seeds, generation of hydroxyl radicals for cell wall loosening, and nanocatalyst for fastening starch hydrolysis.

320 citations

Journal ArticleDOI
TL;DR: How seed priming/conditioning affects the integrative role of hydrogen peroxide in seed germination and aging is outlined and the detrimental effects of H2O2 on seed biology is focused on.
Abstract: Hydrogen peroxide was initially recognized as a toxic molecule that causes damage at different levels of cell organization and thus losses in cell viability. From the 1990s, the role of hydrogen peroxide as a signaling molecule in plants has also been discussed. The beneficial role of H2O2 as a central hub integrating signaling network in response to biotic and abiotic stress and during developmental processes is now well established. Seed germination is the most pivotal phase of the plant life cycle, affecting plant growth and productivity. The function of hydrogen peroxide in seed germination and seed aging has been illustrated in numerous studies; however, the exact role of this molecule remains unknown. This review evaluates evidence that shows that H2O2 functions as a signaling molecule in seed physiology in accordance with the known biology and biochemistry of H2O2. The importance of crosstalk between hydrogen peroxide and a number of signaling molecules, including plant phytohormones such as abscisic acid, gibberellins and ethylene and reactive molecules such as nitric oxide and hydrogen sulfide acting on cell communication and signaling during seed germination, is highlighted. The current study also focuses on the detrimental effects of H2O2 on seed biology, i.e., seed aging that leads to a loss of germination efficiency. The dual nature of hydrogen peroxide as a toxic molecule on one hand and as a signal molecule on the other is made possible through the precise spatial and temporal control of its production and degradation. Levels of hydrogen peroxide in germinating seeds and young seedlings can be modulated via pre-sowing seed priming/conditioning. This rather simple method is shown to be a valuable tool for improving seed quality and for enhancing seed stress tolerance during post-priming germination. In this review, we outline how seed priming/conditioning affects the integrative role of hydrogen peroxide in seed germination and aging.

257 citations


Cites background from "Priming memory invokes seed stress-..."

  • ...These two strategies constitute “priming memory” or stress imprinting mechanisms, which cover genetic or biochemical modifications induced by priming, which in turn can occur as a result of subsequent stress exposure and which mediate enhanced tolerance of subsequent stress (Chen and Arora, 2013)....

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  • ...It is well established that primed seeds are developmentally more advanced to reach complete germination than unprimed ones (Chen and Arora, 2013)....

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  • ...…organization, and cell division and increases in protein synthesis potential, post-translational processing capacity, and targeted proteolysis have been linked to the advanced germination of primed seeds (Gao et al., 1999; Gallardo et al., 2001; Chen and Arora, 2013; Kubala et al., 2015a)....

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  • ...This abiotic stress generated during priming can activate stress-responsive systems in primed seeds that lead to enhanced tolerance levels to subsequent stress during post-priming germination and seedling establishment (Chen and Arora, 2013)....

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Journal ArticleDOI
TL;DR: This is the first report showing phytochemicals-capped GNPs as a promising nanopriming agent for activating the germination of naturally aged seeds of crop plant.

171 citations


Cites background from "Priming memory invokes seed stress-..."

  • ...Priming seeds also invoke the environmental stress tolerance (Chen and Arora, 2013)....

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References
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Journal ArticleDOI
TL;DR: The mechanisms of ROS generation and removal in plants during development and under biotic and abiotic stress conditions are described and the possible functions and mechanisms for ROS sensing and signaling in plants are compared with those in animals and yeast.
Abstract: Several reactive oxygen species (ROS) are continuously produced in plants as byproducts of aerobic metabolism. Depending on the nature of the ROS species, some are highly toxic and rapidly detoxified by various cellular enzymatic and nonenzymatic mechanisms. Whereas plants are surfeited with mechanisms to combat increased ROS levels during abiotic stress conditions, in other circumstances plants appear to purposefully generate ROS as signaling molecules to control various processes including pathogen defense, programmed cell death, and stomatal behavior. This review describes the mechanisms of ROS generation and removal in plants during development and under biotic and abiotic stress conditions. New insights into the complexity and roles that ROS play in plants have come from genetic analyses of ROS detoxifying and signaling mutants. Considering recent ROS-induced genome-wide expression analyses, the possible functions and mechanisms for ROS sensing and signaling in plants are compared with those in animals and yeast.

9,908 citations

Journal ArticleDOI
TL;DR: In Arabidopsis, a network of at least 152 genes is involved in managing the level of ROS, and this network is highly dynamic and redundant, and encodes ROS-scavenging and ROS-producing proteins.

4,902 citations

Book
31 Jul 1994
TL;DR: Seeds: Germination, Structure, and Composition; Development-Regulation and Maturation; Mobilization of Stored Seed Reserves; and some Ecophysiological Aspects.
Abstract: Seeds: Germination, Structure, and Composition. Seed Development and Maturation. Development-Regulation and Maturation. Cellular Events during Germination and Seedling Growth. Dormancy and the Control of Germination. Some Ecophysiological Aspects of Germination. Mobilization of Stored Seed Reserves. Control of the Mobilization of Stored Reserves. Seeds and Germination: Some Agricultural and Industrial Aspects. Index.

3,492 citations

Journal ArticleDOI
08 Aug 2007-PLOS ONE
TL;DR: The eFP Browser software is easily adaptable to microarray or other large-scale data sets from any organism and thus should prove useful to a wide community for visualizing and interpreting these data sets for hypothesis generation.
Abstract: Summary In conclusion, the eFP Browser is a convenient tool forinterpreting and visualizing gene expression and other data. Notonly is it valuable for its compatibility to existing resources but ithas also been loaded with several useful data sets. The variousmodes and other features allow the user to extract an array ofconclusions and/or generate useful hypotheses. We hope thatmany researchers will be able to use the eFP Browser both tounderstand particular microarray or other experimental results, aswell as to communicate their own findings. MATERIALS AND METHODS The eFP Browser is implemented in Python and makes use of thePython Imaging Library (PIL) Build 1.1.5 (www.python.org),which we modified to provide an optimized flood pixel re-placement function called replaceFill, and other Python modules,as described on the eFP Browser development homepage. Theinputs for the eFP Browser are illustrated in Figure 1. Apictographic representation of the sample collection as a Targa-based image is required, as is an XML control file, shown in detailin Figure 1B. Two other inputs are a database of gene identifiersand their appropriate microarray element lookups and annota-tions, and a database of gene expression values for the givensamples. In the case of the Arabidopsis, Cell and Mouse eFPBrowsers, we have mirrored publicly-available microarray datafrom several sources – described in the Data Sources andsubsequent two sections – in our Bio-Array Resource [10]. Theseinputs are used by the eFP Browser algorithm to generate anoutput image for a user’s gene identifier.The eFP Browser algorithm itself is programmed in an object-oriented manner. The main program, efpWeb.cgi, is responsiblefor the creation of the HTML code for the user interface andpresentation of the output image. It calls on four modules tocomplete the task. These modules are 1) efp.py, which performsmost of the functions for the generation of the output image,including the parsing of the XML control file, average andstandard deviation calculations, fold-change relative to controlvalue calculations, and image map HTML code; 2) efpDb.py,which connects to the gene expression, microarray element andannotation databases, and returns the appropriate values uponbeing called; 3) efpImg.py, which formulates the actual colourreplace calls on the Targa input image; and 4) efpXML.py, whichidentifies the XML control files that are present in the eFPBrowser’s data directory. These are displayed to the user in theData Source drop-down, thus obviating the need to have themhard-coded in the main efpWeb.cgi program.In the case of the Cell eFP Browser, data in the SUBAdatabase indicate the presence of a given protein in a particularsubcellular location, either based on computational methods or asmolecularly documented by mass spectrometric analysis ofsubcellular fractions, GFP fusions etc. [11]. We have used a simpleheuristic to turn these data into a confidence score for a given geneproduct’s presence in a given subcellular compartment:confidence~X

2,416 citations

Trending Questions (1)
What is seed water memory?

Seed water memory refers to the improved stress-tolerance of germinating seeds that have undergone seed priming, a pre-sowing treatment involving partial hydration of seeds.