EFFECTS OF VESICULAR-ARBUSCULAR MYCORRHIZA ON ¹⁴C AND ¹⁵N DISTRIBUTION IN NODULATED FABABEANS

Abstract

PrNo, P. C. ,rNo Peul, E. A. 1980

Growth, nutrition, and soil respiration of a mycorrhiza-defective tomato mutant and its mycorrhizal wild-type progenitor

“…Some earlier studies report an increase in respiration in roots colonised by AMF (Pang and Paul 1980;Peng et al 1993), but others do not (Silsbury et al 1983). Size asymmetry between mycorrhizal and non-mycorrhizal plants is an important factor.…”

“…Allocation of C to AMF may vary with stage of plant development (Mortimer et al 2005). Although some studies have shown that colonisation of roots by AMF can increase belowground respiration (Pang and Paul 1980;Peng et al 1993), others have suggested otherwise (Silsbury et al 1983). Reasons for such differences remain unknown, although size differences between mycorrhizal and non-mycorrhizal plants are likely an important factor in determining total belowground respiration (Langley et al 2005).…”

“…AMF can also stabilise soil aggregates (Rillig 2004), and this may slow soil C turnover and increase long-term C storage. AMF may also influence rates of soil CO 2 efflux from soils, both directly via their own metabolism (Pang and Paul 1980;Peng et al 1993;Valentine and Kleinert 2007) and indirectly via their effects on root growth and metabolism as well as by heterotrophic consumption of AMF-derived C (Langley et al 2005), for example, by collembolans and nematodes (Gange 2000;Bakhtiar et al 2001).…”

Plant mediated interactions between Pseudomonas fluorescens, Rhizobium leguminosarum and arbuscular mycorrhizae on pea

“…It is also thought that the plant-Rhizobium system benefits from the presence of arbuscular mycorrhizae because the mycorrhizae correct not only P deficiency but also any nutrient deficiency in the plant that might be limiting to the Rhizobium (Pacovsky 1986 ;O'Hara et al 1988). Increased mineral nutrient levels in the plant would not only benefit Rhizobium directly, but would also lead to increased photosynthesis, making a greater proportion of photosynthates available to the Rhizobium nodules (Pang and Paul 1980 ;Harris et al 1985). This paper is concerned with the interactions between Rhizobium leguminosarum and an antibiotic (DAPG) and non-antibiotic producing Tn5 mutant of Pseudomonas fluorescens inoculated onto pea plants planted in undisturbed grassland soil containing extensive mycelial networks of arbuscular mycorrhizae associated with the old grass roots.…”

Effects of Exogenous Putrescine on Mycorrhiza, Root System Architecture, and Physiological Traits of Glomus mosseae-Colonized Trifoliate Orange Seedlings

“…These results are in agreement with the finding of Wu et al (2010a) in Citrus tangerine colonized by G. mosseae. On the other hand, root mycorrhizal symbiosis could change the allocation of plant carbohydrates (Pang and Paul, 1980). Typically, AMF need to consume hexose Tab.…”