Influence of vesicular-arbuscular mycorrhiza on phytohormone balances in maize (Zea mays L.)

Danneberg, G.; Latus, C.; Zimmer, W.; Hundeshagen, B.; Schneider-Poetsch, Hj.; Bothe, Hermann

doi:10.1016/s0176-1617(11)80848-5

Cited by 187 publications

(94 citation statements)

References 35 publications

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“…This suggests that AM root systems either scavenge water of low activity more effectively [a finding also implicated by Bethlenfalvay et al (1988b)] or contribute to so-called nonhydraulic root-to-shoot communication (Davies et al 1994) differently than nonAM root systems. Mycorrhizal symbiosis has modified host hormonal relations Danneberg et al 1992;Goicoechea et al 1997a;Nikolaou et al 2003), and we investigated the possibility that mycorrhizal fungi, which are confined to outer root tissues, were affecting distant organs like leaf stomata by changing the hormonal flow of information from roots to shoots in the transpiration stream. Working with maize, sorghum and cowpea, we did not observe much effect of mycorrhizal symbiosis on g s or plant water relations under conditions where strictly nonhydraulic signaling of soil drying prevailed Ebel et al 1994;Augé et al 1995).…”

Section: Mycorrhizae and Plant Water Relationsmentioning

confidence: 99%

Arbuscular mycorrhizae and soil/plant water relations

Augé¹

2004

Can. J. Soil. Sci.

353

165

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Augé, R. M. 2004. Arbuscular mycorrhizae and soil/plant water relations. Can. J. Soil Sci. 84: 373-381. The water relations of arbuscular mycorrhizal (AM) plants have been compared often. However, virtually nothing is known about the comparative water relations of AM and nonAM soils or about the relative influence of AM colonization of soil vs. AM colonization of plants on host water balance. In this review, I summarize findings that support the assertion that colonization of soil may play as important a role as colonization of roots regarding how AM symbiosis affects the water relations of host plants. We observed a slight but significant AM effect on the soil moisture characteristic curve of a Sequatchie fine sandy loam following 7 mo of mycorrhization by Glomus intraradices/Vigna unguiculata. In a separate study, few AM effects on either the wet or dry hysteretic curves were discernible after 12 mo of mycorrhization by G. intraradices or Gigaspora margarita on roots of Phaseolus vulgaris. Using myc-bean mutants, we determined that about half of the considerable promotion of stomatal conductance by G. intraradices and Gi. margarita was attributable to soil colonization and about half to plant colonization. A path analysis modeling approach revealed that soil hyphal colonization had larger direct and total effects on dehydration tolerance of bean than did root hyphal colonization or several other soil or plant variables. Key words:Mycorrhizal symbiosis, soil moisture characteristic, stomatal conductance, water relations Augé, R. M. 2004. Les mycorhizes à arbuscules et leurs liens avec la teneur en eau dans le sol ou la plante. Can. J. Soil Sci. 84: 373-381. On compare souvent les relations hydriques des plantes colonisées par les mycorhizes à arbuscules (MA). Toutefois, on ignore presque tout des relations hydriques des sols à MA et sans MA et de l'influence relative de la colonisation du sol par les MA sur le bilan hydrique de l'hôte par rapport à la colonisation des plantes par les MA. Dans cet article, l'auteur résume les constatations étayant l'affirmation que la colonisation du sol pourrait s'avérer aussi importante que la colonisation des racines quant à l'incidence des MA symbiotiques sur les rapports de la plante hôte avec l'eau. Après sept mois de colonisation par les mycorhizes de Glomus intraradices/Vigna unguiculata, on observe une légère mais significative incidence des MA sur la courbe des paramètres hydriques dans un fin loam sablonneux Sequatchie. Dans le cadre d'une autre étude, les MA ont eu peu d'effets discernables sur la courbe de l'hystérésis en sol sec ou humide après 12 mois de colonisation des racines de Phaseolus vulgaris par les mycorhizes de G. intraradices ou de Gigaspora margarita. L'utilisation de haricots mutants de type myc-révèle qu'on doit environ la moitié de la très forte promotion de la conductance des stomates par G. intraradices et Gigaspora margarita à la colonisation du sol et l'autre moitié à la colonisation de la plante. L'analyse causale par modélisation indique que ...

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Section: Mycorrhizae and Plant Water Relationsmentioning

confidence: 99%

Arbuscular mycorrhizae and soil/plant water relations

Augé¹

2004

Can. J. Soil. Sci.

353

165

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“…The induction of resistance is realized in two ways: first, via a limitation of the absorption of Na and Cl ions from the circulating solution, lowering their intake to levels tolerable for the plant, which is performed by the fungus (Al- Karaki andHammad 2001, Mohammad et al 2003); second, through a general amelioration of the nutritional status by means of a better bal-ance of the intake of more and less available ions (Graham 1986). Other authors show how mycorrhizal fungi can improve the resistance to salinity by influencing the hormonal equilibrium of the plant (Danneberg et al 1992), enhancing water uptake (Ruiz-Lozano and Azcón 1995), stimulating photosynthetic activity (Augè and Stodola 1990) and proline accumulation in the cytoplasm .…”

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confidence: 99%

Mycorrhizal infection ameliorates chlorophyll content and nutrient uptake of lettuce exposed to saline irrigation

Zuccarini¹

2007

Plant Soil Environ.

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Salinity is one of the most serious environmental problems influencing crop growth. Today, the use of microorganisms as biofertilizers in agriculture is quite diffused, and good results have been obtained in terms of induction of resistance to biotic and abiotic stresses in crops. The effects of inoculation with a mixture of the mycorrhizal fungi Glomus mosseae, G. intraradices and G. coronatum have been investigated on lettuce (Lactuca sativa L.) cultivated at three different levels of salinity of the irrigation water (0, 1.5 and 3 g NaCl/l) and collected during three subsequent samplings. Dry mass production was significantly enhanced in the inoculated plants collected at the first sampling, and the effect was even more evident at the highest salinity; however, it was not observed at the latest samplings. The chlorophyll content and total foliar area were mostly enhanced by colonization with the mycorrhizal fungi. Moreover, mycorrhization significantly reduced Na and Cl plant uptake, and stimulated the absorption of K and P. The experiment suggests that mycorrhization can be a suitable way to induce salt-stress resistance in horticultural crops, and that it can show its best effects at medium-high salinity levels of the irrigation water.

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“…Such changes in morphology are expected to be under phytohormonal control (Selvaraj, 1998). Abscisic acid (ABA) was found to be considerably enhanced in both roots and shoots of AM plants as compared with nonmycorrhizal control (Danneberg, 1992). Also, an increase in Indole Acetic Acid (IAA), gibberellin and cytokinin level was observed in G. fasciculatum-inoculated P. juliflora recorded by Selvaraj (1998), showed the influence of the AM fungi, G. fasciculatum, on increased level of growth hormones.…”

Section: Miscellaneous Roles Of Arbuscular Mycorrhizal (Am) Fungimentioning

confidence: 88%

Arbuscular mycorrhizal networks: process and functions. A review

Garg

Chandel

2010

Agron. Sustain. Dev.

154

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-An unprecedented, rapid change in environmental conditions is being observed, which invariably overrules the adaptive capacity of land plants. These environmental changes mainly originate from anthropogenic activities, which have aggravated air and soil pollution, acid precipitation, soil degradation, salinity, contamination of natural and agro-ecosystems with heavy metals such as cadmium (Cd), lead (Pb), mercury (Hg), arsenic (As), global climate change, etc. The restoration of degraded natural habitats using sustainable, low-input cropping systems with the aim of maximizing yields of crop plants is the need of the hour. Thus, incorporation of the natural roles of beneficial microorganisms in maintaining soil fertility and plant productivity is gaining importance and may be an important approach. Symbiotic association of the majority of crop plants with arbuscular mycorrhizal (AM) fungi plays a central role in many microbiological and ecological processes. In mycorrhizal associations, the fungal partner assists its plant host in phosphorus (P) and nitrogen (N) uptake and also some of the relatively immobile trace elements such as zinc (Zn), copper (Cu) and iron (Fe). AM fungi also benefit plants by increasing water uptake, plant resistance and biocontrol of phytopathogens, adaptation to a variety of environmental stresses such as drought, heat, salinity, heavy metal contamination, production of growth hormones and certain enzymes, and even in the uptake of radioactive elements. The establishment of symbiotic association usually involves mutual recognition and a high degree of coordination at the morphological and physiological level, which requires a continuous cellular and molecular dialogue between both the partners. This has led to the identification of the genes, signal transduction pathways and the chemical structures of components relevant to symbiosis; however, scientific knowledge on the physiology and function of these fungi is still limited. This review unfolds our current knowledge on signals and mechanisms in the development of AM symbiosis; the molecular basis of nutrient exchange between AM fungi and host plants; and the role of AM fungi in water uptake, disease protection, alleviation of various abiotic soil stresses and increasing grain production.

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Influence of vesicular-arbuscular mycorrhiza on phytohormone balances in maize (Zea mays L.)

Cited by 187 publications

References 35 publications

Arbuscular mycorrhizae and soil/plant water relations

Arbuscular mycorrhizae and soil/plant water relations

Mycorrhizal infection ameliorates chlorophyll content and nutrient uptake of lettuce exposed to saline irrigation

Arbuscular mycorrhizal networks: process and functions. A review

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