Seasonal dynamics of mycorrhizal associations in maize fields under low input agriculture

Gavito, Mayra E.; Varela, Lucía

doi:10.1016/0167-8809(93)90076-2

Cited by 20 publications

(8 citation statements)

References 18 publications

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“…Arbuscular mycorrhizal fungi are known to play an important role in agroecosystems in relation to crop health and nutrition (Gianinazzi et al., ), and they have been shown to respond to agricultural practice such as crop genotype, tillage, pesticides and fertilization (Larsen et al., ). Here, we show that AMF root colonization was higher in hybrid maize than in landrace maize, which is in contrast to Gavito and Varela (), but in both cases, only a few genotypes were included. Hence, future studies comparing mycorrhiza formation in landrace and hybrid maize should include more genotypes in order to improve the knowledge about mycorrhiza compatibility in hybrid maize compared with landraces.…”

Section: Discussioncontrasting

confidence: 89%

Organic fertilizers alter the composition of pathogens and arbuscular mycorrhizal fungi in maize roots

Aguilar

Carreón-Abud

López-Carmona

et al. 2017

Journal of Phytopathology

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Roots of agricultural crops, including maize, are hosts of different microorganisms, many beneficial, like plant growth and health‐promoting arbuscular mycorrhizal fungi (AMF), as well as pathogens including Pythium, Polymyxa and Microdochium. To improve crop nutrition and health, profound knowledge is required regarding how agricultural practices affect field populations of root‐associated microorganisms. Hence, the objective of this work was to evaluate the effect of crop genotype and organic fertilizers on the plant growth performance of maize and their root‐associated microorganisms. The experiment was conducted as a fully factorial greenhouse pot experiment with maize cultivars (two land races and two hybrids) and organic fertilizers (green manure, cow manure and compost) as the two main factors. Plants were harvested 8 weeks after sowing. In general, the different maize cultivars responded similarly to the applications of the organic fertilizers. Cow manure and compost increased plant growth, whereas green manure had limited effect on plant growth. Root colonization with AMF was reduced by green manure with rape. Infection with the root pathogens Pythium and Polymyxa was reduced by all organic fertilizers, whereas in contrast, infection with Microdochium increased with the majority of the organic fertilizers applied. In conclusion, both maize genotype and organic fertilizers affect the abundance of AMF and root pathogens in maize, which should be considered when developing management strategies of these root‐inhabiting microorganisms.

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Section: Discussioncontrasting

confidence: 89%

Organic fertilizers alter the composition of pathogens and arbuscular mycorrhizal fungi in maize roots

Aguilar

Carreón-Abud

López-Carmona

et al. 2017

Journal of Phytopathology

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“…Despite the well-known highly mycotrophic status of maize (Gavito and Varela, 1993), in our study the AM fungal root colonization of maize was lower than the natural plant species occurring in the Aband. This cannot be explained by the plant species composition in the Aband, since most of the plant species is known to be a non-mycorrhizal status (Harley and Harley, 1987).…”

Section: Root Dry Weight and Am Fungal Root Colonizationcontrasting

confidence: 68%

Agricultural abandonment in Mediterranean reclaimed peaty soils: long-term effects on soil chemical properties, arbuscular mycorrhizas and CO2 flux

Pellegrino

Bosco

Ciccolini

et al. 2015

Agriculture, Ecosystems & Environment

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“…When plants near maturity, they translocate more photosynthate to reproductive structures (seeds), and less is transported to the roots. Gavito and Varela (1993), in a field study in Mexico, concluded that the maximal infection by AM fungi occurred in the roots of 1‐mo‐old corn seedlings. In their study, the level of infection then started to decrease.…”

Section: Resultsmentioning

confidence: 99%

Endomycorrhizal Fungal Survival in Continuous Corn, Soybean, and Fallow

Troeh

Loynachan

2003

Agronomy Journal

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of propagules, and grow rapidly (Menge, 1985). Arbuscular mycorrhizal fungal species that adapt to a wide Survival of arbuscular mycorrhizal (AM) fungi in soil may be afrange of hosts and edaphic contingencies presumably fected by the presence or absence of crops and by the crop being grown. Field studies were conducted in central Iowa during three have a better chance of long-term survival. One means growing seasons with cropping to continuous corn (Zea mays L.) by which AM fungi survive is the production of spores (two cultivars), continuous soybean [Glycine max (L.) Merr.] (two although the length of survival of spores in field soils cultivars), or fallow in three soils to determine AM selection and under varying conditions is not well documented. Presurvival. The initial numbers of spores (all following soybean) in May sumably, when conditions are favorable, these spores 1996 averaged 0.9 g Ϫ1 soil in Clarion (well drained), 1.1 in Nicollet germinate, grow, and produce other fungal structures. (somewhat poorly drained), and 3.6 in Webster (poorly drained) soils. Many cornfields, especially in low-lying areas, exhib-In May 1998, the highest spore count average was 11.2 g Ϫ1 soil in Webster under corn and 3.0 spores g Ϫ1 under soybean. Nicollet soil ited stunting and purple coloration characteristic of seaveraged 6.8 spores g Ϫ1 for corn and 0.9 for soybean in May 1998, vere P deficiency in the fall following the central U.S. whereas Clarion soil had 6.3 for corn and 2.0 for soybean. The fallow floods of summer 1993 (Fixen et al., 1994). Plants treatments consistently had low spore counts, ranging from 0.7 to 1.0 seemed not to be absorbing sufficient P for fast early spores g Ϫ1 for all three soils. After 3 yr under the same cropping growth even though soil tests indicated adequate P. regime, spore numbers in soil were corn Ͼ soybean Ͼ fallow; no Farmers were advised to use 35 to 40 kg P ha Ϫ1 as starter significant differences were found between cultivars of the same crop. fertilizer in areas that had been flooded the previous Most probable number counts were correlated with spore counts and averaged 11% of spore counts, suggesting that only a portion of the year. Ellis (1998) conducted a survey to determine the spores were viable (or culturable in our determination). By the end status of AM fungal populations in areas that were of the study, Glomus albidum and G. etunicatum dominated under flooded in 1993 and reported a decline in AM fungal corn, whereas G. constrictum dominated under soybean.

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Seasonal dynamics of mycorrhizal associations in maize fields under low input agriculture

Cited by 20 publications

References 18 publications

Organic fertilizers alter the composition of pathogens and arbuscular mycorrhizal fungi in maize roots

Organic fertilizers alter the composition of pathogens and arbuscular mycorrhizal fungi in maize roots

Agricultural abandonment in Mediterranean reclaimed peaty soils: long-term effects on soil chemical properties, arbuscular mycorrhizas and CO2 flux

Endomycorrhizal Fungal Survival in Continuous Corn, Soybean, and Fallow

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