Publications by authors named "Robert W Duncan"

L. plants are sensitive to water stress conditions throughout their life cycle from seed germination to seed setting. This study aims at identifying quantitative trait loci (QTL) linked to tolerance to water stress mimicked by applications of 10% polyethylene glycol-6000 (PEG-6000).

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Article Synopsis
  • * In conditions of hypoxia, wild type plants show root damage linked to the breakdown of the RAM and a decrease in auxin levels, primarily due to changes in how auxin moves through the roots, rather than its production.
  • * Studies reveal that enhancing Pgb1 expression maintains the functional RAM during stress, while suppressing it leads to phenotypic issues; restoring auxin levels can reverse RAM degradation, underscoring Pgb1's role in root health under stress.
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To examine the function of phytoglobin 2 (Pgb2) on seed oil level in the oil-producing crop Brassica napus L., we generated transgenic plants in which BnPgb2 was over-expressed in the seeds using the cruciferin1 promoter. Over-expression of BnPgb2 elevated the amount of oil, which showed a positive relationship with the level of BnPgb2, without altering the oil nutritional value, as evidenced by the lack of major changes in composition of fatty acids (FA), and key agronomic traits.

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Background And Aims: Drought reduces plant productivity, especially in the susceptible species Brassica napus. Water stress, mimicked by applications of 10 % polyethylene glycol (PEG), elevates nitric oxide (NO) in root cells after a few hours, contributing to degradation of the root apical meristems (RAMs), the function of which relies on auxin and brassinosteroids (BRs). Phytoglobins (Pgbs) are effective NO scavengers induced by this stress.

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Interest in canola ( L.). In response to this interest, scientists have been tasked with altering and optimizing the protein production chain to ensure canola proteins are safe for consumption and economical to produce.

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The phytopathogenic fungus causes the blackleg disease on , resulting in severe loss of rapeseed production. Breeding of resistant cultivars containing race-specific resistance genes is provably effective to combat this disease. While two allelic resistance genes and recognizing avirulence genes and at plant apoplastic space have been cloned in , the downstream gene expression network underlying the resistance remains elusive.

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Clubroot disease is devastating to crop production when susceptible cultivars are planted in infected fields. European turnips are the most resistant sources and their resistance genes have been introduced into other crops such oilseed rape ( L.), Chinese cabbage and other vegetables.

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Identifying parental combinations that exhibit high heterosis is a constant target for commercial L. hybrid development programs. Finding high heterotic parental combinations can require hundreds of test crosses and years of yield evaluation.

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() microspore-derived embryogenesis has become a model system to study basic aspects of plant development. Recognized transcription factors governing embryogenesis include: (), a member of the plant-specific B3-domain family, and (), a member of the HAP3 subunit of the CCAAT binding factor family. The effects of altered expression of both genes were investigated during microspore-derived embryogenesis in established lines over-expressing or down-regulating , as well as in tilling lines where was mutated.

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Over the last few decades, research focusing on canola (Brassica napus L.) seed oil content and composition has expanded. Oil production and accumulation are influenced by genes participating in embryo and seed development.

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Canola (Brassica napus L.) oil is extensively utilized for human consumption and industrial applications. Among the genes regulating seed development and participating in oil accumulation is FUSCA3 (FUS3), a member of the plant-specific B3-domain family of transcription factors.

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Common bacterial blight (CBB) of common bean (Phaseolus vulgaris L.) is caused by Xanthomonas campestris pv. phaseoli and X.

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