Mycorrhiza response and phosphorus acquisition efficiency of sorghum cultivars differing in strigolactone composition

Abdelhalim, Tilal Sayed; Jannoura, Ramia; Joergensen, Rainer Georg

doi:10.1007/s11104-019-03960-y

Cited by 13 publications

(4 citation statements)

References 32 publications

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“…germination has been associated to the reduction in striglactone production caused by the structural and chemical alterations in the roots of AMF-colonized plants that disrupts strigolactone exudation patterns, thereby leading to poor stimulation of Striga spp. seed germination (Steinkellner et al, 2007;Abdelhalim et al, 2019). This can be further affirmed in some earlier reports of the root exudates of the mycorrhizal maize and sorghum plants which induced lower Striga seed germination when compared to the control plants.…”

Section: Current Trends In Striga Managementsupporting

confidence: 77%

Trenchant microbiological-based approach for the control of Striga: Current practices and future prospects

Olowe

Akanmu

Fadiji

et al. 2023

Front. Sustain. Food Syst.

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Striga species are obligate parasitic weeds most of which are members of the Orobanchaceae family. They are commonly associated with staple crops and constitute threats to food security, especially in Sub-Saharan Africa. They pose deleterious impacts on staple cereal crops like maize and pearl millet, resulting in 7–10 billion dollars yield losses or, in extreme infestations, entire crop losses. Farmers' limited knowledge about the weed (genetics, ecology, nature of the damage caused, complex life cycle, interactions with its host and associated microbes) and their attitude toward its control have negatively affected its management and sustainability. With the present Striga management such as mechanical, chemicals, cultural and biological measures, it is extremely difficult to achieve its active management due to nature of the association between host plants and parasites, which requires highly selective herbicides. The use of soil microbes has not been well explored in the management of Striga infection in African countries. However, many soil microorganisms have been considered viable biological control techniques for fighting parasitic weeds, due to their vast action and roles they play in the early stage of host-Striga interaction. Their application for pest control is well perceived to be cost-effective and eco-friendly. In this review, we gave a comprehensive overview of major knowledge gaps and challenges of smallholders in Striga management and highlighted major potentials of microbial-based approach with respect to the mechanisms of host-Striga-microbe interactions, and the metagenomics roles on Striga management that include understanding the microbe and microbial systems of Striga-infested soil.

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Section: Current Trends In Striga Managementsupporting

confidence: 77%

Trenchant microbiological-based approach for the control of Striga: Current practices and future prospects

Olowe

Akanmu

Fadiji

et al. 2023

Front. Sustain. Food Syst.

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“…They desorb for example otherwise insoluble Fe and Zn forms in soil, which can also be taken up by dicotyledonous legumes unable to secrete the respective phytosiderophores 32 . Triticale might also be able to excrete phytohormones such as strigolactones 33 , which affect root branching and AMF colonization only over short distances. However, the role of such secondary plant components released by the intercrops to stimulate the release of legume rhizodeposits needs more experimental evidence.…”

Section: Discussionmentioning

confidence: 99%

Evidence of considerable C and N transfer from peas to cereals via direct root contact but not via mycorrhiza

Hupe

Naether

Haase

et al. 2021

Sci Rep

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Intercropping of legumes and cereals is an important management method for improving yield stability, especially in organic farming systems. However, knowledge is restricted on the relevance of different nutrient transfer pathways. The objective of the study was to quantify nitrogen (N) and carbon (C) transfer from peas to triticale by (1) direct root contact (= R), (2) arbuscular mycorrhizal fungi (AMF; = A), and (3) diffusion (= D). Pea (Pisum sativum cv. Frisson and P2) and triticale (Triticum × Secale cv. Benetto) plants as intercrop were grown for 105 days. Treatment ADR enabled all transfer paths between the two crops. Treatment AD with root exclusion enabled AMF and diffusion transfer between peas and triticale. Treatment A with a diffusion gap barrier only allowed AMF transfer. Pea plants were labelled every 14 days with a 13C glucose and 15N urea solution, using the cotton wick technique. Direct root contact resulted in the highest pea rhizodeposition and thus the largest absolute amounts of N and C transfer to triticale. Root exclusion generally changed composition of rhizodeposits from fine root residues towards root exudates. Pea plant-N consisted of 17% N derived from rhizodeposition (NdfR) in treatment ADR but only 8% in the treatments AD and A, independently of pea variety, whereas pea plant-C consisted of 13% C derived from rhizodeposition (CdfR), without pea variety and transfer path treatment effects. Averaging all transfer path treatments, 6.7% of NdfR and 2.7% of CdfR was transferred from Frisson and P2 to triticale plants. Approximately 90% of this NdfR was transferred by direct root contact from Frisson to triticale and only 10% by AMF, whereas only 55% of CdfR was transferred to triticale by direct root contact, 40% by AMF and 5% by diffusion. Similar percentages were transferred from mutant P2 to triticale. Root exclusion generally changed RD composition from fine root residues towards root exudates.

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“…AMF community assembly in our research site was well fitted to neutral model, but it still seems to be affected by the adaptivity of AMF OTUs to the soil environment and host plant. Abdelhalim, Jannoura, and Joergensen (2019a) recently reported that the AMF colonization rate and phosphorus use efficiency were different between the different sorghum cultivars with different strigolactone compositions. The difference in the AMF community structures associated with roots varied in cultivars of the same crop species also had been reported (Krishna et al 1985;Tawaraya 2003;An et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Dominance of limited arbuscular mycorrhizal fungal generalists of Sorghum bicolor in a semi-arid region in Sudan

Badi

Abdelhalim

Eltayeb

et al. 2019

Soil Science and Plant Nutrition

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Despite the economic importance of sorghum in Sudan, its productivity is low. Arbuscular mycorrhizal fungi (AMF) enhance sorghum growth, survival, and nutrient uptake, and their manipulation may have potential in mitigating biotic and abiotic stresses during droughts. However, information on the AMF community in Sudan and the host-AMF specificity at the sorghum genotype level are unknown. We investigated the AMF community structure of 19 sorghum genotypes by next-generation sequencing in a semi-arid region. A total of 102 AMF operational taxonomic units (OTUs) were detected comprising four families: Glomeraceae (85.3%), Claroideoglomeraceae (10.8%), Paraglomeraceae (2.9%), and Diversisporaceae (1%). Among them, appearance ratio of three OTUs (2.9%) belonging to Rhizoglomus was more than 75%, whereas 75 OTUs had lower appearance ratio than 25%, indicating that the AMF community comprised a small number of generalist and a large number of rare OTUs. Non-metric multidimensional scaling and permutational multivariate analysis of variance showed no AMF specificity of the sorghum genotypes. The community assembly was strongly influenced by neutral processes, but 11 OTUs had higher relative frequency than expected by neutral model. The result includes the possibility that adaptability of AMF to soil environment and positive selection by host plant also affect the AMF community assembly. Our work showed that only a few Rhizoglomus species dominated without host plant genotype specificity in a semi-arid Sudanese cropland. Further research on functional analysis of the dominant AMF species may reveal the importance of the dominant AMF species for sorghum cultivation in Sudan.

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Mycorrhiza response and phosphorus acquisition efficiency of sorghum cultivars differing in strigolactone composition

Cited by 13 publications

References 32 publications

Trenchant microbiological-based approach for the control of Striga: Current practices and future prospects

Trenchant microbiological-based approach for the control of Striga: Current practices and future prospects

Evidence of considerable C and N transfer from peas to cereals via direct root contact but not via mycorrhiza

Dominance of limited arbuscular mycorrhizal fungal generalists of Sorghum bicolor in a semi-arid region in Sudan

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