INFLUENCE OF MYCORRHIZAS, ORGANIC SUBSTRATES AND CONTAINER VOLUMES ON THE GROWTH OF Heliocarpus popayanensis Kunth

Zangaro, Waldemar; Torezan, José Marcelo Domingues; Rostirola, Leila Vergal; Souza, Priscila Bochi de; Nogueira, Marco Antônio

doi:10.1590/01047760201521031335

Cited by 10 publications

(12 citation statements)

References 25 publications

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“…Moreover, the grain biomass was reduced in comparison with when the AMF were allowed to access the second compartment but without a nutrient patch present. AMF may become more beneficial to the plant host with increasing pot size (Audet & Charest, 2010;Zangaro, Torezan, Rostirola, Souza, & Nogueira, 2015), and the current study provides evidence that this is due to the AMF being able to explore growth substrate beyond the reach of the plant roots. However, AMF have relatively high N demands and can act as a sink for patch-derived N (Herman, Firestone, Nuccio, & Hodge, 2012;Hodge & Fitter, 2010); hence, under low N conditions, as used in this study, AMF may become less mutualistic (Johnson, Wilson, Bowker, Wilson, & Miller, 2010;Puschel et al, 2016), perhaps due to AMF fulfilling their own nutritional requirements first, before passing nutrients to the host.…”

Section: Effects Of Direct Amf Access To Organic Nutrient Patches Omentioning

confidence: 61%

Aphids can acquire the nitrogen delivered to plants by arbuscular mycorrhizal fungi

et al. 2019

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Above‐ and below‐ground organisms can interact by altering the quality of shared host plants. Arbuscular mycorrhizal fungi (AMF) influence plant nutrient uptake, including nitrogen (N) acquisition. Under low N and phosphorus conditions, AMF delivery of N from organic sources not immediately available to the plant can have large impacts on plant N status, a limiting nutrient in the aphid diet. This study investigated the effect of AMF colonisation upon aphid number and determined the consequences of AMF directly accessing an organic nutrient patch that the plant cannot. We hypothesised that AMF colonisation of plants will increase plant and aphid N status, plant performance and aphid number, but only when the AMF had direct access to the added organic patch. Barley plants hosting the grain aphid Sitobion avenae were colonised by the AMF, Funneliformis mosseae, or no AMF. A two‐compartment microcosm was used to separate the plant roots from a 15N‐labelled organic patch in a second compartment. AMF‐colonised plants, but without access to the second compartment, were used to examine the effect of AMF colonisation on aphid number. In a separate treatment, and to determine whether AMF access to a plant inaccessible N source modified the effect of AMF colonisation on aphid number, AMF hyphae were permitted access to the second compartment containing an organic patch. As a control for AMF accessing a larger substrate volume, AMF were allowed access to a second compartment without an organic patch. When the AMF accessed the organic patch, more N from the patch was delivered to the plant resulting in a higher grain N concentration although plant growth was depressed. More N from the patch was also delivered to the aphids, but the N status of the aphid remained unchanged. Regardless of the level of access to the organic patch, AMF colonisation did not affect aphid number. Our data show that by accessing N sources not readily available to plants, AMF can indirectly deliver N to above‐ground organisms, a finding which has major implications for N‐transfer between higher trophic levels. A plain language summary is available for this article.

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Section: Effects Of Direct Amf Access To Organic Nutrient Patches Omentioning

confidence: 61%

Aphids can acquire the nitrogen delivered to plants by arbuscular mycorrhizal fungi

et al. 2019

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“…2014, Zangaro et al . 2003, 2015). In contrast, seeds of late-successional woody species are usually larger and produce larger and more robust seedlings, which had their emergence less affected by the network of the competitor root system.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, root competition can be attenuated by association with arbuscular mycorrhizal fungi (AMF), which improves the woody seedling survival, establishment and growth (Zangaro et al . 2000, 2003, 2015). The AMF is an effective way for plants to partition the below-ground resources (i.e.…”

Section: Introductionmentioning

confidence: 99%

Differences between root traits of early- and late-successional trees influence below-ground competition and seedling establishment

et al. 2016

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Abstract:The competitive influence of the root system of the exotic grass Urochloa brizantha and the widespread forb Leonotis nepetifolia on the emergence, survival and early growth of the seedlings of eight tropical heliophilous herbaceous species, six early-successional woody species and five late-successional woody species from Brazil, grown in 3500-cm3 pots and in greenhouse without light restriction were assessed. The density of fine-root systems produced by the forb and the grass in pots were 6.8 cm cm−3 soil and 48.1 cm cm−3 soil, respectively. Seedlings survival of the heliophilous herbaceous, early- and late-successional woody species were 86%, 70% and 100% in presence of the forb root system and 12%, 14% and 100% in competition with grass root system, respectively. The competitive pressure applied by the grass root system on seedling growth of the heliophilous herbaceous, early- and late-successional woody species were 2.4, 1.9 and 1.4 times greater than the forb root system. Total root length of the heliophilous herbaceous, early- and late-successional woody species grown without competitors were 13, 33 and 5 times greater than in competition with forb, and were 66, 54 and 6 times greater than in competition with grass root system, respectively. The averages of fine-root diameter of plants grown without competitors were 209 μm for the heliophilous herbaceous, 281 μm for early-successional trees and 382 μm for late-successional trees. The root system of the forb did not avoid seedling establishment of most plant species, but the grass root system hampered more the establishment of heliophilous herbaceous and early-successional woody species than the seedling establishment of late-successional woody species. The different density of root systems produced in soil by the forb and the grass, and the distinct root traits (e.g. root diameter and root tissue density) of the early- and late-successional plant species can explain the differences in the establishment of seedlings of plant species belonging to different groups of tropical succession when exposed to below-ground competition.

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“…Además, se ha comprobado que las micorrizas son un factor importante que contribuye al mantenimiento de la biodiversidad vegetal de un ecosistema (Van der Heijden et al, 1998), ya que existen plantas que dependen de la micorrización para sobrevivir (Wilson y Hartnett, 1997). La estimulación en el crecimiento de las plantas por efecto de la micorrización se ha comprobado en diversas especies vegetales de importancia agrícola como por ejemplo el tomate (Ley-Rivas et al, 2015), la papaya (Quiñones-Aguilar et al, 2012), el café (Parra et al, 1990), el maíz (Bi et al, 2018), el frijol (Liriano et al, 2012) y en el árbol Heliocarpus popayanensis usado para reforestación (Zangaro et al, 2015).…”

Section: Introductionunclassified

“…In addition, mycohrrizae have shown to be an important factor that contributes to the maintenance of plant biodiversity in an ecosystem (Van der Heijden et al, 1998) since plants depend on mycorrhizae to survive (Wilson and Hartnett, 1997). Plant growth stimulation by the effects of mycorrhization has been proven in different plant species of agricultural importance, for example, tomato (Ley-Rivas et al, 2015), papaya (Quiñones-Aguilar et al, 2012), coffee (Parra et al, 1990), maize (Bi et al, 2018), bean (Liriano et al, 2012) and the tree Heliocarpus popayanensis used for reforestation (Zangaro et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Crecimiento de girasol ornamental en maceta a nivel de campo por efecto de hongos micorrízicos arbusculares

Vital-Vilchis¹,

Quiñones-Aguilar²,

Hernández-Cuevas

et al. 2020

Terra

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La popularidad del girasol como planta ornamental se incrementó dramáticamente en la última década. Algunos estudios muestran que hongos micorrízicos arbusculares (HMA) aumentaron el diámetro del capítulo floral y un adelanto en la floración de gerbera; sin embargo, esto depende tanto de la especie de HMA, como de la planta hospedera. El objetivo de este trabajo fue evaluar el efecto de diferentes inóculos de HMA en el crecimiento de variedades ornamentales de girasol. Se estableció un experimento en Zapopan durante 2017 en bloques al azar con seis repeticiones por tratamiento con dos factores: HMA con cinco niveles: Rhizophagus intraradices (Ri), Funneliformis mosseae (Fm), consorcios: Cerro del Metate (CM) y Las Campesinas (LC) y sin HMA; variedad de girasol ornamental con cuatro niveles: belleza de otoño (BO), gigante simple amarillo (GSA), doble enana (DE) y doble gigante (DG). Setenta días después de establecido el experimento se evaluaron variables de crecimiento y colonización micorrízica. Los resultados mostraron que GSA-CM fue superior en variables de crecimiento respecto a los otros tratamientos (Tukey, P ≤ 0.05). El consorcio CM estimuló el crecimiento de GSA con respecto al girasol no inoculado en un 31%. Sin embargo, la variedad BO mostró 60% de decremento del crecimiento con todos los inóculos de HMA respecto al control sin HMA. Con el inóculo Fm, se tuvo la menor colonización micorrízica (28%); sin embargo, mostró efectos signif icativos en el crecimiento del girasol. Estos resultados sugieren una diversidad de respuesta al crecimiento dependiendo de la variedad de girasol y el tipo de HMA.

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INFLUENCE OF MYCORRHIZAS, ORGANIC SUBSTRATES AND CONTAINER VOLUMES ON THE GROWTH OF Heliocarpus popayanensis Kunth

Cited by 10 publications

References 25 publications

Aphids can acquire the nitrogen delivered to plants by arbuscular mycorrhizal fungi

Aphids can acquire the nitrogen delivered to plants by arbuscular mycorrhizal fungi

Differences between root traits of early- and late-successional trees influence below-ground competition and seedling establishment

Crecimiento de girasol ornamental en maceta a nivel de campo por efecto de hongos micorrízicos arbusculares

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