Symbiotic Exchange of Nutrients in Arbuscular Mycorrhizas: Transport and Transfer of Phosphorus

Saitô, Masanori

doi:10.1007/978-94-017-0776-3_5

Cited by 26 publications

(25 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…AMF enhancement in ALP activity in our study is consistent with other reports (Fries et al 1998, Saito 2000, Tawaraya and Saito 1994. Higher plant roots are devoid of ALP (Tabatabai 1994), thus ALP activity is largely due to rhizosphere organisms (AMF, bacteria, etc.).…”

Section: Discussionsupporting

confidence: 95%

See 1 more Smart Citation

Arbuscular mycorrhizal fungi and organic fertilizer influence photosynthesis, root phosphatase activity, nutrition, and growth of Ipomoea carnea ssp. fistulosa

Amaya-Carpio¹,

Davies²,

Fox³

et al. 2009

Photosynt.

View full text Add to dashboard Cite

The effect of arbuscular mycorrhizal fungi (AMF) inoculation and organic slow release fertilizer (OSRF) on photosynthesis, root phosphatase activity, nutrient acquisition, and growth of Ipomoea carnea N. von Jacquin ssp. fistulosa (K. Von Martinus ex J. Choisy) D. Austin (bush morning glory) was determined in a greenhouse study. The AMF treatments consisted of a commercial isolate of Glomus intraradices and a non-colonized (NonAMF) control. The OSRF was applied at 10, 30, and 100 % of the manufacturer's recommended rate. AMF plants had a higher net photosynthetic rate (P N ), higher leaf elemental N, P, and K, and generally greater growth than NonAMF plants. Total colonization levels of AMF plants ranged from 27 % (100 % OSRF) to 79 % (30 % OSRF). Root acid phosphatase (ACP) and alkaline phosphatase (ALP) activities were generally higher in AMF than non-AMF plants. When compared to NonAMF at 100 % OSRF, AMF plants at 30 % OSRF had higher or comparable ACP and ALP activity, higher leaf elemental P, N, Fe, Cu, and Zn, and a greater P N (at the end of the experiment), leading to generally greater growth parameters with the lower fertility in AMF plants. We suggest that AMF increased nutrient acquisition from an organic fertilizer source by enhancing ACP and ALP activity thus facilitating P acquisition, increasing photosynthesis, and improving plant growth.

show abstract

Section: Discussionsupporting

confidence: 95%

“…The activities of ACP and ALP are closely related to the level of AMF colonization in maize (Zea mays) roots (Fries et al 1998). However, Gianinazzi-Pearson (1996) and Saito (2000) reported less ACP and ALP activity in AMF than NonAMF roots.…”

Section: Introductionmentioning

confidence: 81%

Arbuscular mycorrhizal fungi and organic fertilizer influence photosynthesis, root phosphatase activity, nutrition, and growth of Ipomoea carnea ssp. fistulosa

Amaya-Carpio¹,

Davies²,

Fox³

et al. 2009

Photosynt.

View full text Add to dashboard Cite

show abstract

“…This hypothesis is supported by the report of Azcon , showing that the increased total root length and surface induced by AM improves nutrient transport, and by the well known effect of the AM fungus on uptake of phosphorus and other nutrients through external hyphae and translocation to the plant (George, 2000;Saito, 2000).…”

Section: Discussionsupporting

confidence: 63%

Morphogenetic modifications induced by Pseudomonas fluorescens A6RI and Glomus mosseae BEG12 in the root system of tomato differ according to plant growth conditions

et al. 2002

View full text Add to dashboard Cite

Summary• The ability of fluorescent pseudomonads and glomalean fungi to promote plant growth has been reported many times. However, little is known of their effects on root morphogenesis. Growth and root morphogenesis were compared in tomato (Lycopersicon esculentum) plants inoculated or not with a model strain of Pseudomonas fluorescens (A6RI) or with the arbuscular mycorrhizal fungus Glomus mosseae (BEG12).• Plants were cultivated in a sandy-loam soil mixed with sand at two different ratios (2 : 1 and 1 : 2), in gnotobiotic conditions. Plant growth was evaluated by measuring root and shoot fresh weight, and various morphometric parameters were compared.• Growth of control plants was less in the 1 : 2 than in the 2 : 1 soil : sand mixture, and root morphogenesis was also significantly altered by soil:sand mixture. P. fluorescens A6RI promoted plant growth and increased total root length, surface area and volume in the more fertile soil:sand mixture (2 : 1) whereas G. mosseae BEG12 did the same in the less fertile soil : sand mixture (1 : 2).• The relevance of differences between the two types of organisms in relation to the environmental conditions favourable for the expression of their beneficial effects is discussed in the context of microbial inoculation.

show abstract

“…To conclude, the enhancement of mineral uptake by fungal hyphae is well recognized as a primary mechanism responsible for plant growth stimulation by AM fungi (Saito, 2000). Whether the enhancement in plant hormones has a direct effect on the establishment of AM symbiosis is not yet known.…”

Section: Discussionmentioning

confidence: 99%

Hormone concentrations in tobacco roots change during arbuscular mycorrhizal colonization with *Glomus intraradices**

et al. 2002

View full text Add to dashboard Cite

Summary• Phytohormones are known to play a pivotal role in various developmental processes in plants and in arbuscular-mycorrhizal (AM) fungal-host symbiosis. This study focuses on characterizing the changes in the concentrations of auxins, cytokinins and gibberellins in tobacco ( Nicotiana tabacum ) during the early stages of colonization by Glomus intraradices , using advanced analytical detection techniques.• High-pressure liquid chromatography analysis followed by radioimmunoassay detection revealed that AM colonization induced the accumulation of specific zeatin riboside-like and isopentenyl adenosine-like compounds in both roots and shoots.• Use of the gas chromatography-mass spectrometry technique on the same developmental stage revealed that gibberellins (GA) of the earl-13-hydroxylation biosynthetic pathway (GA 1 , GA 8 , GA 19 and GA 20 ) were significantly more abundant in roots, but not shoots, of AM inoculated plants than in those of nonmycorrhizal plants. Indoleacetic acid concentrations (total and free) remained unaltered by AM colonization.• This study demonstrates that hormonal changes do occur during AM symbiosis with tobacco, before the fungal benefits manifest.

show abstract

Symbiotic Exchange of Nutrients in Arbuscular Mycorrhizas: Transport and Transfer of Phosphorus

Cited by 26 publications

References 91 publications

Arbuscular mycorrhizal fungi and organic fertilizer influence photosynthesis, root phosphatase activity, nutrition, and growth of Ipomoea carnea ssp. fistulosa

Arbuscular mycorrhizal fungi and organic fertilizer influence photosynthesis, root phosphatase activity, nutrition, and growth of Ipomoea carnea ssp. fistulosa

Morphogenetic modifications induced by Pseudomonas fluorescens A6RI and Glomus mosseae BEG12 in the root system of tomato differ according to plant growth conditions

Hormone concentrations in tobacco roots change during arbuscular mycorrhizal colonization with *Glomus intraradices**

Contact Info

Product

Resources

About

Symbiotic Exchange of Nutrients in Arbuscular Mycorrhizas: Transport and Transfer of Phosphorus

Cited by 26 publications

References 91 publications

Arbuscular mycorrhizal fungi and organic fertilizer influence photosynthesis, root phosphatase activity, nutrition, and growth of Ipomoea carnea ssp. fistulosa

Arbuscular mycorrhizal fungi and organic fertilizer influence photosynthesis, root phosphatase activity, nutrition, and growth of Ipomoea carnea ssp. fistulosa

Morphogenetic modifications induced by Pseudomonas fluorescens A6RI and Glomus mosseae BEG12 in the root system of tomato differ according to plant growth conditions

Hormone concentrations in tobacco roots change during arbuscular mycorrhizal colonization with Glomus intraradices*

Contact Info

Product

Resources

About

Hormone concentrations in tobacco roots change during arbuscular mycorrhizal colonization with *Glomus intraradices**