Publications by authors named "Tracy E Hawk"
Soybean cyst nematode (SCN, [Hg]) is a serious root parasite of soybean () that induces extensive gene expression changes associated with pleiotropic biological activities in infected cells. However, the impacts of various SCN Hg types on host transcriptome reprogramming remain largely unknown. Here, we developed and used two recombinant inbred lines (RIL; RIL-72 and RIL-137) to profile transcriptome reprogramming in the infection sites during the resistant and susceptible interactions with SCN Hg Type 1.
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- - The study investigates the role of GmMKK2, a soybean MPK kinase, in plant immunity against soybean cyst nematode (SCN), highlighting its upregulation in response to SCN feeding sites.
- - Overexpression of a kinase-dead variant (KD-GmMKK2) significantly reduces soybean susceptibility to SCN, suggesting its role in priming defense mechanisms compared to the wild type variant which shows no effect.
- - Transcriptomic and phosphoproteomic analyses reveal that KD-GmMKK2 enhances defense signaling pathways and identifies multiple biological targets influenced by GmMKK2, indicating alternative signaling routes beyond standard MAPK cascades in response to SCN infection.
BAK1-INTERACTING RECEPTOR LIKE KINASE1 (BIR1) is a negative regulator of various aspects of disease resistance and immune responses. Here, we investigated the functional role of soybean (Glycine max) BIR1 (GmBIR1) during soybean interaction with soybean cyst nematode (SCN, Heterodera glycines) and the molecular mechanism through which GmBIR1 regulates plant immunity. Overexpression of wild-type variant of GmBIR1 (WT-GmBIR1) using transgenic soybean hairy roots significantly increased soybean susceptibility to SCN, whereas overexpression of kinase-dead variant (KD-GmBIR1) significantly increased plant resistance.
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- A study reveals that DNA methylation plays a significant role in how plants interact with nematodes, though the specific gene activities in feeding sites are still unclear.
- Researchers investigated the promoter activity of 12 genes related to DNA methylation in Arabidopsis plants infected by two types of nematodes, finding that certain types of DNA methylation are active during different stages of nematode feeding site development.
- The results suggest that these DNA methylation mechanisms influence the plant's susceptibility to infection, with different effects depending on the type of methylation and the stage of infection.