Surface electric charge of thylakoid membranes from genetically modified tobacco plants under freezing stress

Doltchinkova, Virjinia; Angelova, Plamena R.; Ivanova, Elena; Djilianov, D.; Moyankova, Daniela; Konstantinova, T.; Atanassov, A.

doi:10.1016/j.jphotobiol.2012.12.004

Cited by 10 publications

(11 citation statements)

References 47 publications

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“…It was recently demonstrated that Raf can be imported in chloroplasts (Schneider and Keller, 2009) and therefore it could function as a cryoprotectant. As explained above for fructans or other osmolytes, it can be speculated that the · OH scavenging capacity of Raf counteracts membrane and protein damage, contributing to thylakoid membrane stability and chloroplast integrity under stress (Doltchinkova et al, 2013). Likewise, targeting the synthesis of mannitol, another well-known · OH scavenger (Stoyanova et al, 2011), to chloroplasts resulted in increased resistance to oxidative stress (Shen et al, 1997a, b), similar to what is observed in GolS overexpressors with their increased Raf levels (Nishizawa et al, 2008).…”

Section: Membrane Stabilization and Antioxidant Propertiesmentioning

confidence: 99%

Multifunctional fructans and raffinose family oligosaccharides

Ende¹

2013

Front. Plant Sci.

199

116

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Fructans and raffinose family oligosaccharides (RFOs) are the two most important classes of water-soluble carbohydrates in plants. Recent progress is summarized on their metabolism (and regulation) and on their functions in plants and in food (prebiotics, antioxidants). Interest has shifted from the classic inulin-type fructans to more complex fructans. Similarly, alternative RFOs were discovered next to the classic RFOs. Considerable progress has been made in the understanding of structure–function relationships among different kinds of plant fructan metabolizing enzymes. This helps to understand their evolution from (invertase) ancestors, and the evolution and role of so-called “defective invertases.” Both fructans and RFOs can act as reserve carbohydrates, membrane stabilizers and stress tolerance mediators. Fructan metabolism can also play a role in osmoregulation (e.g., flower opening) and source–sink relationships. Here, two novel emerging roles are highlighted. First, fructans and RFOs may contribute to overall cellular reactive oxygen species (ROS) homeostasis by specific ROS scavenging processes in the vicinity of organellar membranes (e.g., vacuole, chloroplasts). Second, it is hypothesized that small fructans and RFOs act as phloem-mobile signaling compounds under stress. It is speculated that such underlying antioxidant and oligosaccharide signaling mechanisms contribute to disease prevention in plants as well as in animals and in humans.

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Section: Membrane Stabilization and Antioxidant Propertiesmentioning

confidence: 99%

Multifunctional fructans and raffinose family oligosaccharides

Ende¹

2013

Front. Plant Sci.

199

116

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“…Plants developed a variety of defense mechanism to adapt from stress environment, although it is not enough to defend them. Due to stress, plants experience cellular dehydration and accumulate reactive oxygen species which ultimately affects membrane potentials and macromolecules like carbohydrates, proteins, and DNA (Doltchinkova et al 2013 ). Therefore, to fulfi ll the demand, crop production must be increased exponentially.…”

Section: Abiotic Stress: Serious Threat To Global Crop Productionmentioning

confidence: 99%

Engineering Phytohormones for Abiotic Stress Tolerance in Crop Plants

Kumar

Sah

Khare

et al. 2016

Plant Hormones Under Challenging Environmental Factors

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Abiotic stresses including salinity, drought, extreme temperatures, and heavy metals are posing serious threats to agricultural yields as well as the quality of produce. This necessitates the production of cultivars capable to withstand the harsh environmental conditions without substantial yield losses. Owing to the complexity underlying stress tolerance traits, conventional breeding techniques have met with limited success and demand effective supplements to feed the growing food demands worldwide. This necessitates the development and deployment of novel and potent approaches, and engineering of phytohormone metabolism could be a method of choice to produce climate resilient crops with higher yields. Phytohormones are considered critical for regulating and coordinating plant growth and development; however, in recent years, they have received great attention for their multifunctional roles in plant responses to environmental stimuli. Creditable research has shown that phytohormones including the classical ones -auxins, cytokinins, ethylene, gibberellins, and newer members including brassinosteroids, jasmonates, and strigolactones -may prove to be potent targets for their metabolic engineering for producing abiotic stress-tolerant crop plants. This chapter presents short description of the roles of phytohormones in abiotic stress responses and tolerance followed by reviewing attempts made by the plant biotechnologists for

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“…Typically, mitogen-activated protein kinase (MAPK) cascades are universal signaling pathways employed in such responses . Plants adapt to unfavorable environmental conditions by accumulating highly soluble organic compounds of low molecular weight like sugars, sugar alcohols, amino acids and amino acid derivatives (Doltchinkova et al, 2013). In addition, plants detoxify ROS through a combination of antioxidants (ascorbate (AsA) and glutathione (GSH), and antioxidative enzymes [superoxide dismutase (SOD); ascorbate peroxidase (APX); monodehydroascorbate reductase (MDHAR); dehydroascorbate reductase, (DHAR); and catalase (CAT)] (Choe et al, 2013;Peshev et al, 2013).…”

Section: Mxcs1mentioning

confidence: 99%

“…Antioxidative enzymes are involved in chloroplasts, cytosol and mitochondria that are known sources of ROS generation. In addition, transgenic plants with increased contents of compatible solutes show a strong potential for improving their stress tolerance (Doltchinkova et al, 2013). This review summarizes the gene sources and the effects on stress tolerance after transforming these genes into tobacco.…”

Section: Mxcs1mentioning

confidence: 99%

“…Abiotic stress causes cellular dehydration and accumulation of reactive oxygen species (ROS) such as hydrogen peroxide, which may function as signal to counteract these stresses, for instance by increasing endogenous osmotic pressure to prevent further water loss from the cell (Doltchinkova et al, 2013). In general, ROS are one of the major damaging factors that arise when plants are exposed to various abiotic stresses, including nutrient excess/depletion, flooding drought, desiccation, extreme temperatures, light/dark cycles, high salinity, ozone, anoxia and herbicides (Choet et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Current trends in genetic manipulations to enhance abiotic and biotic stresses in tobacco

Tesfaw¹,

Feyissa²

2014

Afr. J. Biotechnol.

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Environmental stresses, both abiotic and biotic, are the main factors reducing crops productivity. Biotic stresses caused by fungi, viruses, bacteria and insects are the major threats. However, abiotic stresses have more adverse effects on crop yield and crop survival. Hitherto, tolerant plants were mainly produced by classical breeding techniques. Success in breeding for better adapted varieties to abiotic and biotic stresses depends on the concerted efforts of various research domains including plant and cell physiology, molecular biology, genetics and breeding. However, such process is time consuming. The production of transgenic plants by genetic engineering allows a much faster progress. This review focuses on stress tolerance on tobacco. Tolerance to salt, drought, water stress, low and high temperature, heavy metals, pathogens and pests were enhanced via overexpression of specific stress related genes from different sources.

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Surface electric charge of thylakoid membranes from genetically modified tobacco plants under freezing stress

Cited by 10 publications

References 47 publications

Multifunctional fructans and raffinose family oligosaccharides

Multifunctional fructans and raffinose family oligosaccharides

Engineering Phytohormones for Abiotic Stress Tolerance in Crop Plants

Current trends in genetic manipulations to enhance abiotic and biotic stresses in tobacco

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