Arbuscular mycorrhizal symbiosis alleviates drought stress imposed on Knautia arvensis plants in serpentine soil

Doubková, Pavla; Vlasáková, Eva; Sudová, Radka

doi:10.1007/s11104-013-1610-7

Cited by 104 publications

(57 citation statements)

References 46 publications

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“…3A). Under severe WS conditions (21.3 MPa), tomato AM+ plants showed significant lower levels of ABA in roots compared with control plants, in agreement with what was reported for Knautia arvensis (Doubková et al, 2013). ABA concentration also was higher in FmWS than in RiWS plants (Fig.…”

Section: Aba Content and The Expression Of Aba-responsive Genessupporting

confidence: 89%

“…1B). Since water use efficiency is often considered a variable parameter in AM plants exposed to WS (Asrar et al, 2012;Doubková et al, 2013), to overcome this constraint and obtain a more precise indication of stress effects, we chose to analyze the iWUE, as reported by Schultz and Stoll (2010). During the whole duration of WS treatment, iWUE in RiWS plants followed a progressively increasing trend statistically different from that recorded for control and FmWS plants.…”

Section: Impact Of Mycorrhizal Symbiosis On Tomato Physiological Perfmentioning

confidence: 99%

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Insights On the Impact of Arbuscular Mycorrhizal Symbiosis On Tomato Tolerance to Water Stress

et al. 2016

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Arbuscular mycorrhizal (AM) fungi, which form symbioses with the roots of the most important crop species, are usually considered biofertilizers, whose exploitation could represent a promising avenue for the development in the future of a more sustainable next-generation agriculture. The best understood function in symbiosis is an improvement in plant mineral nutrient acquisition, as exchange for carbon compounds derived from the photosynthetic process: this can enhance host growth and tolerance to environmental stresses, such as water stress (WS). However, physiological and molecular mechanisms occurring in arbuscular mycorrhiza-colonized plants and directly involved in the mitigation of WS effects need to be further investigated. The main goal of this work is to verify the potential impact of AM symbiosis on the plant response to WS. To this aim, the effect of two AM fungi (Funneliformis mosseae and Rhizophagus intraradices) on tomato (Solanum lycopersicum) under the WS condition was studied. A combined approach, involving ecophysiological, morphometric, biochemical, and molecular analyses, has been used to highlight the mechanisms involved in plant response to WS during AM symbiosis. Gene expression analyses focused on a set of target genes putatively involved in the plant response to drought, and in parallel, we considered the expression changes induced by the imposed stress on a group of fungal genes playing a key role in the water-transport process. Taken together, the results show that AM symbiosis positively affects the tolerance to WS in tomato, with a different plant response depending on the AM fungi species involved.

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Section: Aba Content and The Expression Of Aba-responsive Genessupporting

confidence: 89%

Section: Impact Of Mycorrhizal Symbiosis On Tomato Physiological Perfmentioning

confidence: 99%

Insights On the Impact of Arbuscular Mycorrhizal Symbiosis On Tomato Tolerance to Water Stress

et al. 2016

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“…It is documented that the mycorrhizae are involved in nutrient transfer to the plant by increasing root surface, extending the nutrient depletion area around the root, and making phosphorus and nitrogen sources available to the plant [43]. Recently, Doubková et al [44] found that inoculation improves plant growth and increases phosphorus uptake, which is in line with this result and our other previous results [13,14].…”

Section: Resultssupporting

confidence: 87%

Heavy Metal-Induced Differential Responses to Oxidative Stress and Protection by Mycorrhization in Sunflowers Grown in Lab and Field Scales

Paun¹,

Neagoe²,

Paun³

et al. 2015

Pol. J. Environ. Stud.

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Heavy metals (HM) are some of the most frequent soil contaminants and a cause for long-term loss of soils, for destruction of natural habitats, loss of agricultural and inhabitable soils, and numerous health problems for wildlife and the human population. Reactive oxygen species (ROS) are generated during the normal metabolism of plants and activated by both biotic and abiotic stressors such as HM [1]. They are key messengers in plant responses to HM stress as part of their defense and adaptation mechanisms, either directly, by disturbing electron transport, or indirectly, by disturbing metabolic reactions, inactivation, and down-regulation of stress response enzymes and depletion of antioxidant substrates [2,3]. They also affect the photosynthetic system at many levels, leading to Pol. J. Environ. Stud. Vol. 24, No. 3 (2015), [1235][1236][1237][1238][1239][1240][1241][1242][1243][1244][1245][1246][1247] AbstractThe influence of arbuscular mycorrhizal (AM) fungi (Glomus intraradices) and of heavy metal stress on the characteristics of biomass production, as well as non-enzymatic and enzymatic variables in the roots, shoots, and leaves of sunflower (Helianthus annuus L.) plants were studied at pot and field scales. The intensity of the mycorrhizal colonization (M%) and the arbuscular abundance in the root system (A%) were found to be higher in the sunflower grown at lab scale (artificially inoculated) than that grown at field scale (natively inoculated). Thus, the AM symbiosis with the sunflower root system exposed to a different degree of pollution had a differential protective effect on plants at lab and field scales. A huge biomass of sunflower was harvested from the field compared to that obtained from the lab experiment. Furthermore, after measuring the biochemical variables of the plant parts, the results indicated a decrease in field for the superoxide dismutase and peroxidase activity, for the lipid peroxidation content, and for the assimilating pigments, while all quantified variables showed almost the same pattern of variation in all three plant parts. Consequently, it can be concluded that it is possible to use biochemical response variables, which in the case of our study are consistent with the protective effect of the fungus, as environmental biomarkers for soils with moderate pollution.

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“…Its numerous benefits to the plant include improved mineral (particularly P) nutrition, better water supply and protection against certain root pathogenic fungi (Brundrett, 1991 Doubková et al, 2013). The mechanisms of AMF induced water stress amelioration include a more efficient exploration of the soil through modification of root morphology (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…thinner, longer, more frequently branching roots), improvement and stabilization of soil aggregate structure resulting in higher water holding capacity, enhancement of the accumulation of osmotically active substances in roots, better protection against photodamage through higher amount of plant antioxidants, and enhancement of plant water uptake via stimulation of plant metabolic activity (Augé, 2001;Rapparini and Peñuelas, 2014). For example, Doubková et al (2013) measured better plant water status and growth in AMF associated than in non-mycorrhizal Knautia arvenis plants when subjected to water stress, and detected a stress severity threshold beyond which the AMF alleviation of water stress failed. In a pot experiment, Zhu et al (2012) observed higher water content, stomatal conductance, photosynthetic rate and photochemical efficiency for mycorrhizal then for non-mychorrizal maize plants.…”

Section: Introductionmentioning

confidence: 99%

Deficit Watering Reduces Plant Growth to a Smaller Extent With Arbuscular Mycorrhizal Association Than Without It for Non-Invasive Grass Species but Not for Invasive Grass Species

Endresz

Mojzes

Kalapos

2015

AEER

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Abstract. Symbiotic associations with the soil microbiota, particularly with arbuscular mycorrhizal fungi (AMF), might ameliorate the effects of environmental stress on plants, and this capacity may be different for resident and alien species. In a growth room pot experiment we tested if imposed water deficit leads to greater growth reduction in the absence of AMF than in the presence of AMF for two non-invasive resident (Danthonia alpina, Chrysopogon gryllus) and two invasive (Calamagrostis epigejos, Cynodon dactylon) grass species from semiarid temperate grasslands in Hungary. Both deficit watering and soil sterilization decreased biomass accumulation, but the non-invasive Danthonia and Chrysopogon performed better when grown in intact soil containing AMF than in sterilized soil. In contrast, the invasive Calamagrostis and Cynodon displayed mostly no difference in growth and biomass accumulation between intact and sterilized soil when subjected to water deficit. When plants were grown well-watered but deprived of AMF symbionts, both Danthonia and Chrysopogon achieved poorer growth than in AMF containing soil, while neither Calamagrostis nor Cynodon displayed any reduction. These results indicate that the influence of deficit watering was ameliorated by the presence of AMF in the soil for the resident non-invasive species, while not for the invasive species.

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Arbuscular mycorrhizal symbiosis alleviates drought stress imposed on Knautia arvensis plants in serpentine soil

Cited by 104 publications

References 46 publications

Insights On the Impact of Arbuscular Mycorrhizal Symbiosis On Tomato Tolerance to Water Stress

Insights On the Impact of Arbuscular Mycorrhizal Symbiosis On Tomato Tolerance to Water Stress

Heavy Metal-Induced Differential Responses to Oxidative Stress and Protection by Mycorrhization in Sunflowers Grown in Lab and Field Scales

Deficit Watering Reduces Plant Growth to a Smaller Extent With Arbuscular Mycorrhizal Association Than Without It for Non-Invasive Grass Species but Not for Invasive Grass Species

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