Abstract Detail



Ecology

Pearl , Carson Howard [1], Abrahams, Richard [2], Velasco, Pablo [3], PIRES , JOSEPH CHRIS [4].

Glucosinolate Diversity in Kale: Implications in a Missouri Environment.

Mustard oils (glucosinolates) are a diverse group of natural plant compounds that are present in many important crop species. We are familiar with these compounds from the taste and smell of mustard, wasabi, arugula, Brussels sprouts, kale, and a variety of vegetables and spices. However, glucosinolates affect not just human palatability, but also human health, plant defense, and how plants interact with their environment. However, breeding efforts for one trait may have a negative trade-off with other important traits; e.g., selecting for better tasting Brussel sprouts may reduce the plants ability to fend off insect pests. Thus, elucidating the specific function(s) that each glucosinolate plays in the context of a local environment is important to understand both crop development and improvement. In this study, we used four accessions of kale (Brassica oleracea), which were selectively bred for high and low levels of two glucosinolates: sinigrin and glucobrassicin. Plants were grown for one month in laboratory conditions and then transplanted into field mesocosms. Over a one month period, the plants were measured for insect recruitment, growth speed, and other conditions. The plants then were harvested to assess percent leaf herbivory and for metabolomic analyses. We hypothesize that plants with high levels of glucosinolates will be correlated with decreased overall insect recruitment rate, but with a higher ratio of specialist to generalist herbivores. The inverse is expected in the low sinigrin and glucobrassicin lines. Results will highlight the impact of glucosinolate profile diversity in Brassica oleracea grown in a mid-Missouri environment.


1 - University of Missouri, Columbia, Biological/ Plant Sciences, Columbia, MO - Missouri, 65211, USA
2 - University of Missouri, Columbia, Division of Biological Sciences, Columbia, MO, 65211, USA
3 - Misión Biológica de Galicia (CSIC), Group of Genetics, Breeding and Biochemistry of Brassicas, Pontevedra, 36080, Spain
4 - University Of Missouri, 371 Bond Life Sciences Center, 1201 Rollins Street, Columbia, MO, 65211, United States

Keywords:
Brassica
Plant-Insect interaction
Glucosinolates
Trophic interactions.

Presentation Type: Poster
Number: PEC004
Abstract ID:124
Candidate for Awards:Ecological Section Best Undergraduate Presentation Award


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