Arbuscular mycorrhizal fungi induced alteration to root longevity of poplar

Hooker, J. E.; Black, Kyrsten E.; Perry, Ronald L.; Atkinson, David

doi:10.1007/bf00011335

Cited by 70 publications

(51 citation statements)

References 16 publications

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“…No difference in root deaths (either cumulative or instantaneous) was observed over the duration of our study and overall deaths were few. By contrast, Hooker et al (1995) reported AM colonization decreased the longevity of fine roots of poplar. The influence of mycorrhizal colonization on root production and mortality rates is clearly complex and requires further investigation with a range of host plants and fungal taxa before any firm conclusions can be made.…”

Section: Root Proliferationmentioning

confidence: 92%

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 Proliferationmentioning

confidence: 92%

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

2000

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“…They have helped improve our understanding of many aspects of root ecology, including production, longevity, phenology and distribution in a wide array of ecosystems (Aerts et al, 1992;Dubach and Russelle, 1995;Eissenstat and Caldwell, 1988;Pregitzer, 1992a, 1993a,b;Hooker et al, 1995;Kosola et al, 1995;Taylor, 1987;Upchurch and Ritchie, 1983). Within the past few years, the technology associated with minirhizotrons has advanced considerably.…”

Section: Introductionmentioning

confidence: 99%

Applications of minirhizotrons to understand root function in forests and other natural ecosystems

1996

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Minirhizotrons have proved useful to understand the dynamics and function of fine roots. However, they have been used comparatively infrequently in forests and other natural plant communities. Several factors have contributed to this situation, including anomalous root distributions along the minirhizotron surface and the difficulty of extracting data from minirhizotron images. Technical and methodological advances have ameliorated some of these difficulties, and minirhizotrons have considerable potential to address some questions of long standing interest. These questions include more fully understanding the role of roots in carbon and nutrient cycling, rates of root decomposition, responses to resource availability and the functional significance of interactions between plant roots and soil organisms. Maximizing the potential for minirhizotrons to help us better understand the functional importance of fine roots in natural plant communities depends upon using them to answer only those questions appropriate to both their inherent strengths and limitations.

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“…Induced resistance responses to microbial inoculants are well documented in plants grown in vivo (Benhamou et al 1996;Hunt and Ryals 1996;Kloepper et al 1997). Moreover, induction of stress resistance in plant propagules produced in vitro prior to transplanting is the primary target of several research groups attempting utilization of microbial inoculants in micropropagation (Hooker et al 1995;Nowak et al 1995;Balla et al 1997;Lazarovits and Nowak 1997;Murphy et al 1997;Wilhelm et al 1997).…”

Section: Introductionmentioning

confidence: 99%

Improving micropropagation: effect ofAzospirillum brasilenseSp245 on acclimatization of rootstocks of fruit tree

Vettori

Russo

Felici

et al. 2010

Journal of Plant Interactions

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The effect of Azospirillum brasilense Sp245 on the micropropagation of three fruit rootstocks: Mr.S 2/5 plum (Prunus cerasifera )P. spinosa), GF 677 hybrid (Prunus persica )P. amigdalus), and MM 106 apple (Northen Spy )M1) was assessed. Rooted shoots were treated with 3 )10 7 of Sp245 cells during transplantation from in vitro cultures to the acclimatization phase. After 60 days, growth parameters were positively affected by Sp245 inoculum. In the case of Mr.S 2/5, an increase in rootstock stem length and node number by 37% and 42%, respectively, compared to the control was noted. In the case of GF 677, the bacterial inoculum increased stem length and node number by up to the 75% and 65%, respectively, compared to the control. The inoculum did not exert on MM 106 for both parameters suggesting that the effects of Sp245 could depend on a specific clonemicrobe association. In all cases, however, a higher vigor, consistent with a wider leaf area, was present in the inoculated plantlets demonstrating that the use of Azospirillum can significantly contribute to optimize plant performance during the phase of adaptation of plants to post-vitrum conditions.

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Arbuscular mycorrhizal fungi induced alteration to root longevity of poplar

Cited by 70 publications

References 16 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

Applications of minirhizotrons to understand root function in forests and other natural ecosystems

Improving micropropagation: effect ofAzospirillum brasilenseSp245 on acclimatization of rootstocks of fruit tree

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