Stalk rot fungi affect grain sorghum yield components in an inoculation stage-specific manner

Bandara, Y. M. A. Y.; Weerasooriya, Dilooshi K.; Tesso, Tesfaye; Prasad, P. V. Vara; Little, Christopher R.

doi:10.1016/j.cropro.2016.12.018

Cited by 20 publications

(7 citation statements)

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“…The current study focused on fusarium stalk rot, which is caused by several Fusarium species (Tesso et al, 2010). Fusarium stalk rot is typified by deterioration of the cortical parenchyma cells surrounding the vascular bundles (Bandara et al, 2017). The pathogens can grow endophytically (without symptoms) through the plant (Funnell-Harris et al, 2010) but disease can be manifested following drought conditions during flowering or early grain fill (Tesso et al, 2004).…”

Section: Author Manuscriptmentioning

confidence: 99%

“…Additionally, forage quality can be decreased due to deterioration of stalks. Stalk diseases can also affect grain yields, which may be due to stunting of plant growth, to impaired ability of stalks to translocate water, nutrients or photosynthates to developing grain, and to reduced grain harvest from lodged plants (Bandara et al, 2017). crop is drought tolerant and can be grown in areas with limited water resources.…”

Section: Introductionmentioning

confidence: 99%

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Field response of near‐isogenic brown midrib sorghum lines to fusarium stalk rot, and response of wildtype lines to controlled water deficit

2018

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Section: Author Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Field response of near‐isogenic brown midrib sorghum lines to fusarium stalk rot, and response of wildtype lines to controlled water deficit

2018

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“…Charcoal rot is a high priority fungal disease in sorghum [ Sorghum bicolor (L.) Moench], causing tremendous crop losses wherever sorghum is grown (Tarr, 1962, Tesso et al ., 2012). Recent studies have shown that charcoal rot can negatively affect the grain sorghum physical and chemical properties (Bandara et al, 2017a), yield parameters (Bandara et al, 2017b), and leaf greenness (Bandara et al, 2016), as well as the key biofuel traits of sweet sorghum (Bandara et al, 2017c). There are limited options available to control charcoal rot disease.…”

Section: Introductionmentioning

confidence: 99%

Host lipid alterations afterMacrophomina phaseolinainfection contribute to charcoal rot disease susceptibility in grain sorghum: Evidence from transcriptomic and lipidomic data

et al. 2019

Preprint

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25• Lipids are involved in central metabolic processes and confer basic configuration to 26 cellular and subcellular membranes. Lipids also play a role in determining the outcome of 27 plant-pathogen interactions. Lipid based links that delineate either host resistance or 28 susceptibility against necrotrophic microorganisms are poorly investigated and described. 29 Macrophomina phaseolina (MP) is an important necrotrophic fungus which causes 30 diseases in over 500 plant species including charcoal rot in sorghum. 31 32 • We used RNA sequencing and automated direct infusion electrospray ionization-triple 33 quadrupole mass spectrometry (ESI-MS/MS) to quantitatively profile the transcriptomes 34 and lipidomes of a known charcoal rot resistant (SC599) and susceptible (Tx7000) 35 sorghum genotype in response to MP inoculation. 36 37 • We found that MP is capable of significantly decreasing the phosphatidylserine, 38 phytosterol, and ox-lipid contents in the susceptible genotype while significantly 39 increasing its stigmasterol:sitosterol and monogalactosyldiacylglycerol: 40 digalactosyldiacylglycerol ratios. None of the above was significantly affected in the 41 resistant genotype, except for the significantly increased ox-lipid content. 42 43 • Our transcriptome and functional lipidome findings suggested the lethal impacts of MP 44 inoculation on plastid-and cell-membrane integrity and the lipid based signaling 45

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“…With the recent interest in bioenergy feedstocks, sorghum has been recognized as a promising alternative for sustainable biofuel production (Kimber et al 2013). Recent studies have revealed the negative impacts of charcoal rot disease on grain sorghum physicochemical properties (Bandara et al 2017a), yield components (Bandara et al 2017b), and the staygreen trait (Bandara et al 2016), as well as the biofuel traits of sweet sorghum (Bandara et al 2018a; Bandara et al 2017c). As charcoal rot is a high priority fungal disease in sorghum [ Sorghum bicolor (L.) Moench], that causes crop losses where ever sorghum is grown (Tesso et al 2012), more research is needed to identify charcoal rot resistance/susceptibility mechanisms.…”

Section: Introductionmentioning

confidence: 99%

The necrotrophic fungus Macrophomina phaseolina induces oxidative stress-associated genes and related biochemical responses in charcoal rot susceptible sorghum genotypes

Bandara

Weerasooriya

Liu

et al. 2019

Preprint

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Macrophomina phaseolina (MP) is a necrotrophic fungus that causes charcoal rot disease in sorghum [Sorghum bicolor (L.) Moench]. The host resistance and susceptibility mechanisms for this disease are poorly understood. Here, the transcriptional and biochemical aspects of the oxidative stress and antioxidant system of charcoal rot resistant and susceptible sorghum genotypes in response to MP inoculation were investigated. RNA sequencing revealed 96 differentially expressed genes between resistant (SC599) and susceptible (Tx7000) genotypes that are related to the host oxidative stress and antioxidant system. Follow-up functional experiments demonstrated MP’s ability to significantly increase reactive oxygen (ROS) and nitrogen species (RNS) content in the susceptible genotypes. This was confirmed by increased malondialdehyde content, an indicator of ROS/RNS-mediated lipid peroxidation. The presence of nitric oxide (NO) in stalk tissues of susceptible genotypes was confirmed using a NO-specific fluorescent probe (DAF-FM DA) and visualized by confocal microscopy. Inoculation significantly increased peroxidase activity in susceptible genotypes while catalase activity was significantly higher in MP-inoculated resistant genotypes. MP inoculation significantly reduced superoxide dismutase activity in all genotypes. These findings suggested MP’s ability to promote a host-derived oxidative stress response in susceptible sorghum genotypes, which contributes to induced cell death-associated disease susceptibility to this necrotrophic phytopathogen.

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Stalk rot fungi affect grain sorghum yield components in an inoculation stage-specific manner

Cited by 20 publications

References 23 publications

Field response of near‐isogenic brown midrib sorghum lines to fusarium stalk rot, and response of wildtype lines to controlled water deficit

Field response of near‐isogenic brown midrib sorghum lines to fusarium stalk rot, and response of wildtype lines to controlled water deficit

Host lipid alterations afterMacrophomina phaseolinainfection contribute to charcoal rot disease susceptibility in grain sorghum: Evidence from transcriptomic and lipidomic data

The necrotrophic fungus Macrophomina phaseolina induces oxidative stress-associated genes and related biochemical responses in charcoal rot susceptible sorghum genotypes

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