Facilitation of plant phosphate acquisition by arbuscular mycotrhizas from enriched soil patches

Cui, Min; Caldwell, Martyn M.

doi:10.1111/j.1469-8137.1996.tb01912.x

Cited by 78 publications

(50 citation statements)

References 31 publications

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“…Repression of root growth in the presence of an organic patch has been demonstrated previously by Hodge et al (1998). Cui & Caldwell (1996) reported that proliferation of Agropyron desertorum roots in nutrient-rich patches decreased when colonized by AM fungi, although the difference was only weakly significant (P l 0.07). By contrast, in our study the reverse was observed ; addition of a mycorrhizal inoculum enhanced proliferation within an organic patch.…”

Section: Root Proliferationsupporting

confidence: 67%

An arbuscular mycorrhizal inoculum enhances root proliferation in, but not nitrogen capture from, nutrient‐rich patches in soil

2000

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Most work on root proliferation to a localized nutrient supply has ignored the possible role of mycorrhizal fungi, despite their key role in nutrient acquisition. Interactions between roots of Plantago lanceolata, an added arbuscular mycorrhiza (AM) inoculum and nitrogen capture from an organic patch (Lolium perenne shoot material) dual-labelled with "&N and "$C were investigated, to determine whether root proliferation and nitrogen (N) capture was affected by the presence of AM fungi. Decomposition of the organic patch in the presence and absence of roots peaked in all treatments at day 3, as shown by the amounts of "$CO # detected in the soil atmosphere. Plant N concentrations were higher in the treatments with added inoculum 10 d after patch addition, but thereafter did not differ among treatments. Plant phosphorus concentrations at the end of the experiment were depressed by the addition of the organic residue in the absence of mycorrhizal inoculum. Although uninoculated plants were also colonized by mycorrhizal fungi, colonization was enhanced at all times by the added inoculum. Addition of the AM inoculum increased root production, observed in situ by the use of minirhizotron tubes, most pronouncedly within the organic patch zone. Patch N capture by the end of the experiment was c. 7.5% and was not significantly different as a result of adding an AM inoculum. Furthermore, no "$C enrichments were detected in the plant material in any of the treatments showing that intact organic compounds were not taken up. Thus, although the added AM fungal inoculum benefited P. lanceolata seedlings in terms of P concentrations of tissues it did not increase total N capture or affect the form in which N was captured by P. lanceolata roots.

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Section: Root Proliferationsupporting

confidence: 67%

An arbuscular mycorrhizal inoculum enhances root proliferation in, but not nitrogen capture from, nutrient‐rich patches in soil

2000

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“…In the accompanying study (Cui & Caldwell, 1996), mycorrhizal roots of Agropyron desertorujn were quite effective in exploiting P from enriched patches. The present work addresses how effectively the hyphae can exploit nutrient-rich patches several centimetres distant from the roots.…”

Section: Introductionmentioning

confidence: 82%

“…Field soil was collected and sterilized as described previously (Cui & Caldwell, 1996). Sixteen kg of dry soil were placed in the outer compartment of each container, and 0-4 kg in the central compartment.…”

Section: Soil and Initial Nutrient Patternsmentioning

confidence: 99%

Facilitation of plant phosphate acquisition by arbuscular mycorrhizas from enriched soil patches

Cui

Caldwell

1996

New Phytologist

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Effects of arbuscular mycorrhizas (AM) on plant exploitation of soil nutrient heterogeneity were studied with nonmycorrhizal and mycorrhizal Agropyron desertorum (Fisch. ex Link) Schult. in two-compartment containers. A central cylindrical plant compartment was separated from an outer hyphal compartment by two layers of stainlesssteel screen with a 2 mm air gap between the screen layers. Patchy or uniform nitrate (NO.,^) and phosphate (P) distribution patterns were created in the outer compartment. Oniy AM hyphae could cross the double-screen barrier to access those nutrients. Mycorrhiza! plants acquired significantly more labelled P in both the patchy-and the uniform-nutrient treatments than did non-mycorrhizal plants. Mycelia m root-free soil delivered similar amounts of P from the more distant rich patches to mycorrhiza! plants as from the uniforra and more proximate labeUing. The uptake of a more mobi!e and abundant element, nitrate, was not affected significantly by either mycorrhiza! infection or by nutrient distribution patterns in the root-free soi!. Despite a !ower root:shoot mass ratio, mycorrhiza! p!ants had significant!y greater shoot phosphorus concentration t!ian did nonmycorrhiza! plants. There was no significant difference in P uptake or phosphorus concentration between the two nutrient distribution patterns for mycorrhiza! plants, indicating that AM hyphae can explore the root-free soi! for avai!able P and transport it to host plants equal!y we!! when P was distributed in eitlier patchy or uniform patterns in the root-free soi!.

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“…Therefore, mycorrhiza increases phosphorus uptake by plant roots under drought stress and without stress (Hetrick et al, 1996). Phosphorus uptake increased by absorption from roots (Smith and Read, 1997;Cui and Caldwell, 1996). The symbiosis with the G. intraradices fungus in pepper resulted in an increase in leaf area ratio, which is due to mycorrhizal effect on increasing phosphorus content in this plant (Demir, 2004).…”

Section: Figure 24 Effect Of Drought Stress Levels On Na Concentrationmentioning

confidence: 99%

The Effect of Mycorrhizal Symbiosis and Seed Priming on the Amount of Chlorophyll Index and Absorption of Nutrients Under Drought Stress in Sesame Plant Under Field Conditions

Askari¹

2018

Appl. Ecol. Env. Res.

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Askari et al. : The effect of mycorrhizal symbiosis and seed priming on the amount of chlorophyll index and absorption of nutrients under drought stress in sesame plant under field conditions - Abstract. Plants are exposed to environmental stresses during their growth. One of the most important stresses is drought stress, which can affect the absorption and transfer of nutrients to the plant. The use of advantageous microorganisms such as mycorrhizal fungi as well as seed priming are among the solutions that have been taken into consideration in many p lants in recent years to mitigate the effects of water shortages and drought stress. In the present study, the effect of mycorrhizal symbiosis and seed priming on the amount of chlorophyll index and absorption of nutrients in sesame oilseed under drought stress was investigated during 2013 and 2014 at the farm of Hajiabad Agricultural Research Station in Hormozgan-Iran. The main drought stress factor included irrigation based on providing 100% of the plant 's water requirement (normal irrigation), providing 70% of the plant's water requirement (mild stress) and providing 50% of the plant's water requirement (severe stress), Priming substrate was at three levels: no priming (control), hydro-priming and osmo-priming, and another sub-factor consisted of mycorrhiza fungi species: without inoculation mycorrhizal fungi (control), using Glomus mosseae and Glomus intraradices. The results of combined analysis of variance showed that the effects of drought stress and mycorrhizal symbiosis on leaf chlorophyll index, nitrogen (N), phosphorus (P), potassium (K), iron (Fe), zinc (Zn) and copper concentration (Cu) in leaf were significant. Sodium concentration was only significantly affected by drought stress and seed priming was only effective on Cu concentration. Interaction of irrigation × mycorrhizal symbiosis was significant on pand Cu uptake and interaction of irrigation × seed priming was only significant on iron concentration. Results showed that severe drought stress (providing 50% of plant water requirement) had the highest effect on decreasing amount of chlorophyll index and concentration of nitrogen and phosphorus elements in leaves, whereas concentrations of potassium, zinc, iron, copper and sodium increased with drought stress. Inoculation with mycorrhizal fungi increased the amount of chlorophyll index, nitrogen, phosphorus, potassium, zinc, iron and copper uptake compared with the absence of mycorrhizal fungi. Keywords: chlorophyll index, drought stress, mycorrhizal symbiosis, nutrients, seed priming, sesame Askari et al.: The effect of mycorrhizal symbiosis and seed priming on the amount of chlorophyll index and absorption of nutrients under drought stress in sesame plant under field conditions -336 -APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 16(1):335-357.

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Facilitation of plant phosphate acquisition by arbuscular mycotrhizas from enriched soil patches

Cited by 78 publications

References 31 publications

An arbuscular mycorrhizal inoculum enhances root proliferation in, but not nitrogen capture from, nutrient‐rich patches in soil

An arbuscular mycorrhizal inoculum enhances root proliferation in, but not nitrogen capture from, nutrient‐rich patches in soil

Facilitation of plant phosphate acquisition by arbuscular mycorrhizas from enriched soil patches

The Effect of Mycorrhizal Symbiosis and Seed Priming on the Amount of Chlorophyll Index and Absorption of Nutrients Under Drought Stress in Sesame Plant Under Field Conditions

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