Cropping practices impact fungal endophytes and pathogens in durum wheat roots

Taheri, Ahmad Esmaeili; Hamel, Chantal; Gan, Yantai

doi:10.1016/j.apsoil.2015.12.007

Cited by 28 publications

(12 citation statements)

References 47 publications

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“…For example, Berg et al (2005) found Trichoderma and other Verticillium antagonists such as Penicillium and Monographella to vary in diversity and abundance across sites and among host plant (strawberry and oilseed rape) rhizosphere soils. Recently, Taheri et al (2016) reported that fungal antagonist communities differed depending on the identity of the legume in crop rotation. Unfortunately, understanding of the mechanisms by which plant communities selectively amplify disease-protective fungi does not go beyond single plant species or genotypes (Hartmann et al 2009).…”

Section: Disease-protective Fungimentioning

confidence: 99%

Cover crops to increase soil microbial diversity and mitigate decline in perennial agriculture. A review

Vukicevich

Lowery

Bowen

et al. 2016

Agron. Sustain. Dev.

265

157

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Section: Disease-protective Fungimentioning

confidence: 99%

Cover crops to increase soil microbial diversity and mitigate decline in perennial agriculture. A review

Vukicevich

Lowery

Bowen

et al. 2016

Agron. Sustain. Dev.

265

157

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“…In a previous study, we found that plant density had a significant effect on aboveground dry matter accumulation in intercropping (Yin et al, 2017), suggesting that the belowground interspecies interactions may also stimulate the growth of the aboveground plant parts. Furthermore, the outcome of the recovery effect may be related to other soil-related factors because soil environments in the rooting zone are complex in nature and are affected by many factors, such as soil water availability (Niu et al, 2017), and soil physical (Luo et al, 2017), chemical (Grant et al, 2016), and biological (Taheri et al, 2016) properties. Agronomic practices may also affect the outcome of the recovery such as preceding crops in the rotation (Luce et al, 2016), tillage practices (Lupwayi et al, 2015), and soil microbial community structure and functionalities (Borrell et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Interspecies Interactions in Relation to Root Distribution Across the Rooting Profile in Wheat-Maize Intercropping Under Different Plant Densities

Wang

Qin²,

Chai

et al. 2018

Front. Plant Sci.

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In wheat-maize intercropping systems, the maize is often disadvantageous over the wheat during the co-growth period. It is unknown whether the impaired growth of maize can be recovered through the enhancement of the belowground interspecies interactions. In this study, we (i) determined the mechanism of the belowground interaction in relation to root growth and distribution under different maize plant densities, and (ii) quantified the “recovery effect” of maize after wheat harvest. The three-year (2014–2016) field experiment was conducted at the Oasis Agriculture Research Station of Gansu Agricultural University, Wuwei, Northwest China. Root weight density (RWD), root length density (RLD), and root surface area density (RSAD), were measured in single-cropped maize (M), single-cropped wheat (W), and three intercropping systems (i) wheat-maize intercropping with no root barrier (i.e., complete belowground interaction, IC), (ii) nylon mesh root barrier (partial belowground interaction, IC-PRI), and (iii) plastic sheet root barrier (no belowground interaction, IC-NRI). The intercropped maize was planted at low (45,000 plants ha−1) and high (52,000 plants ha−1) densities. During the wheat/maize co-growth period, the IC treatment increased the RWD, RLD, and RSAD of the intercropped wheat in the 20–100 cm soil depth compared to the IC-PRI and IC-NRI systems; intercropped maize had 53% lower RWD, 81% lower RLD, and 70% lower RSAD than single-cropped maize. After wheat harvest, the intercropped maize recovered the growth with the increase of RWD by 40%, RLD by 44% and RSAD by 11%, compared to the single-cropped maize. Comparisons among the three intercropping systems revealed that the “recovery effect” of the intercropped maize was attributable to complete belowground interspecies interaction by 143%, the compensational effect due to root overlap by 35%, and the compensational effect due to water and nutrient exchange (CWN) by 80%. The higher maize plant density provided a greater recovery effect due to increased RWD and RLD. Higher maize plant density stimulated greater belowground interspecies interaction that promoted root growth and development, strengthened the recovery effect, and increased crop productivity.

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“…A significant innovation in the durum wheat agronomy on the Canadian prairie is the discovery of the association between durum wheat productivity and soil microbial community. A number of studies have shown that, in pulse-durum rotations, the preceding pulse crops influence microbial community in the soil, the root, and in the rhizosphere of the subsequent durum wheat [80,81,127]. The stimulation of soil microbial community with preceding pulses promotes the stand establishment, root growth, and grain yield of the subsequent durum wheat [80,81,128].…”

Section: Optimizing Feedback Benefits From Soil Microbiomesmentioning

confidence: 99%

“…For example, dry pea matures about 40 to 70 days earlier than chickpea under the southwestern Saskatchewan conditions; this influences the abundance of endophytic fungal antagonist hosted by the following durum wheat. In a 3-year field study, it was found that there were more fungal antagonist after early-maturing pea than after the long-season chickpea [127]. The endophytic fungal antagonists in the pea roots may function as root disease protectors for their host.…”

Section: Pulse Terminationmentioning

confidence: 99%

Agronomic Advancement in Tillage, Crop Rotation, Soil Health, and Genetic Gain in Durum Wheat Cultivation: A 17-Year Canadian Story

Niu

Ruan

et al. 2018

Agronomy

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The global demands for various grains, including durum wheat (Triticum turgidum L. subsp. durum (Desf.) Husn.), are expected to increase substantially in the coming years, due to the ever-growing human population’s needs for food, feed, and fuel. Thus, providing consistent or increased durum grain to the world market is one of the priorities for policy-makers, researchers, and farmers. What are the major achievements in agronomic advancement for durum wheat cultivation in recent decades? How might the current cropping systems be improved to increase crop yield and quality and improve resource use efficiencies while minimizing input costs and decreasing negative impact on the environment? Canada is one of the major durum wheat producers in the world, as Canada contributes about 50% to global trade of durum grain. Canada’s research achievements in durum wheat might serve as a guide for advancing the cultivation of the crop in other regions/countries on the planet. This review summarizes the major Canadian research findings in the aspects of durum wheat agronomics during the period 2001 to 2017 years. It highlights the main advancements in seeding and tillage, crop rotation and diversification, and use of pulse-induced microbiomes to improve soil health and feedback mechanisms. The genetic gain and breeding for resistance against abiotic and biotic stresses are discussed. Finally, we identified the main constraints and suggested some near-term research priorities. The research findings highlighted in this review will be of use for other areas on the planet to increase durum wheat productivity, improve soil fertility and health, and enhance long-term sustainability.

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Cropping practices impact fungal endophytes and pathogens in durum wheat roots

Cited by 28 publications

References 47 publications

Cover crops to increase soil microbial diversity and mitigate decline in perennial agriculture. A review

Cover crops to increase soil microbial diversity and mitigate decline in perennial agriculture. A review

Interspecies Interactions in Relation to Root Distribution Across the Rooting Profile in Wheat-Maize Intercropping Under Different Plant Densities

Agronomic Advancement in Tillage, Crop Rotation, Soil Health, and Genetic Gain in Durum Wheat Cultivation: A 17-Year Canadian Story

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