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Title: DiverseSorghum bicoloraccessions show marked variation in growth and transcriptional responses to arbuscular mycorrhizal fungi

Journal Article · · Plant, Cell and Environment
DOI:https://doi.org/10.1111/pce.13509· OSTI ID:1611821

Sorghum is an important crop grown worldwide for feed and fibre. Like most plants, it has the capacity to benefit from symbioses with arbuscular mycorrhizal (AM) fungi, and its diverse genotypes likely vary in their responses. Presently, the genetic basis of mycorrhiza-responsiveness is largely unknown. Here, we investigated transcriptional and physiological responses of sorghum accessions, founders of a bioenergy nested association mapping panel, for their responses to four species of AM fungi. Transcriptome comparisons across four accessions identified mycorrhiza-inducible genes; stringent filtering criteria revealed 278 genes that show mycorrhiza-inducible expression independent of genotype and 55 genes whose expression varies with genotype. The latter suggests variation in phosphate transport and defence across these accessions. The mycorrhiza growth and nutrient responses of 18 sorghum accessions varied tremendously, ranging from mycorrhiza-dependent to negatively mycorrhiza-responsive. Additionally, accessions varied in the number of AM fungi to which they showed positive responses, from one to several fungal species. Mycorrhiza growth and phosphorus responses were positively correlated, whereas expression of two mycorrhiza-inducible phosphate transporters, SbPT8 and SbPT9, correlated negatively with mycorrhizal growth responses. AM fungi improve growth and mineral nutrition of sorghum, and the substantial variation between lines provides the potential to map loci influencing mycorrhiza responses.

Research Organization:
Boyce Thompson Institute for Plant Research, Ithaca, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0012460
OSTI ID:
1611821
Journal Information:
Plant, Cell and Environment, Vol. 42, Issue 5; ISSN 0140-7791
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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The effect of zinc fertilisation and arbuscular mycorrhizal fungi on grain quality and yield of contrasting barley cultivars journal January 2020
Transcriptomic analysis of field-droughted sorghum from seedling to maturity reveals biotic and metabolic responses journal December 2019
Carbon for nutrient exchange between arbuscular mycorrhizal fungi and wheat varies according to cultivar and changes in atmospheric carbon dioxide concentration journal October 2019
An opportunity to breed rice for improved benefits from the arbuscular mycorrhizal symbiosis? journal December 2019
Effect of Root Colonization by Arbuscular Mycorrhizal Fungi on Growth, Productivity and Blast Resistance in Rice journal June 2020
Mechanisms and Impact of Symbiotic Phosphate Acquisition. text January 2019
Mechanisms and Impact of Symbiotic Phosphate Acquisition journal March 2019
Comparative Analysis of In Vitro Responses and Regeneration between Diverse Bioenergy Sorghum Genotypes journal February 2020
Editorial: Interactions of Plants With Bacteria and Fungi: Molecular and Epigenetic Plasticity of the Host journal March 2020