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ABSTRACT: Striga hermonthica germination variation transcriptomics

PROVIDER: PRJNA904327 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	SRR22381742.fastq.gz	Fastqsanger.gz
	SRR22381743.fastq.gz	Fastqsanger.gz
	SRR22381744.fastq.gz	Fastqsanger.gz
	SRR22381745.fastq.gz	Fastqsanger.gz
	SRR22381746.fastq.gz	Fastqsanger.gz

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Characterization of growth and development of sorghum genotypes with differential susceptibility to Striga hermonthica

Project description:Variation in strigolactone composition in sorghum root exudates underlies its resistance to parasitic weed, Striga hermonthica. Root exudates of the Striga susceptible variety Shanqui Red (SQR) contain primarily 5-deoxystrigol, which has a high efficiency of inducing Striga germination. SRN39 roots primarily exude orobanchol, leading to reduced Striga germination and making this variety resistant to Striga. This structural diversity in exuded strigolactones is determined by the polymorphism in the LGS1 (LOW GERMINATION STIMULANT 1) locus. Yet, the effects of the lgs1 mutation as well as the consequences of the vast genetic diversity between SQR and SRN39 have not been addressed in terms of growth and development. In response to this knowledge gap, we demonstrate additional consequences of LGS1 loss-of-function by phenotypic and molecular characterization. A suite of genes related to metabolism was differentially expressed between SQR and SRN39. Increased levels of gibberellin precursors in SRN39 were accompanied with its slower growth rate and developmental delay and we observed an overall increased SRN39 biomass. The slow-down in growth and differences in transcriptome profiles of SRN39 were strongly associated with plant age. Additionally, analyses of multiple LGS1 loss-of-function genotypes indicated that strigolactone stereochemistry influences root system architecture. To summarize, we demonstrated that the consequences of lgs1 mutation reach further than the changes in strigolactone profiles in root exudates and translates to alteration in growth and development.

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