Thursday Physiologicals

This seminar series allows communication of proposed research or recent results to the P&B graduate group. Participation is compulsory for Physiology & Biochemistry students, and all members of the department are welcome as guests. The talks are held each Thursday at 12:30 on ZOOM in the Kresge Building Room K 103. A reminder and link will be sent each Thursday morning.

Contact Brent Sinclair for further information.

The schedule for the upcoming talks is below.

April 18, 2024

Arani Cuevas-Sanchez: Untangling the cues for freeze tolerance acclimation

Supervisor: Dr. Brent Sinclair

G. veletis requires three environmental cues to become freeze tolerant, but why? This proposal talk will introduce methods that may help us begin understanding the role of environmental cues in shifting physiological processes.

Lorena Yeung: Deciphering the Role of Cytochrome P450s in Soybean Aliphatic Suberin Biosynthesis

Supervisor: Dr. Mark Bernards

Aliphatic suberin is a key component for partial resistance in soybean; however, many key enzymes invovled in it's biosynthesis remain uncharacterized. My research employ molecular and genome-editing tools to understand the roles of CYPs in soybean aliphatic suberin biosynthesis.

April 11, 2024

Olaide Ajibola: Nutritional Composition and Biological Properties of three Selected Edible Functional Mushroom Species

Supervisor: Dr. Raymond Thomas

Knowledge of mycochemical profile of these mushrooms can be utilized as a data-driven decision support tool in the development of novel functional products and optimization of green valorization processes.

April 4, 2024

Betty Paton: Characterizing vision in freeze-tolerant crickets

Supervisor: Dr. Brent Sinclair

How do freeze-tolerant crickets ensure the delicate tissue of the compound eye doesn’t turn into eyes-cream? My objective is to characterize how freezing and thawing affects the eye of the spring field cricket Gryllus veletis.

Andrew Rabas: Two Spores are Deadlier than One: Interplay of Fusarium solani and Ilyonectria mors-panacis in Ginseng Root Rot

Supervisor: Dr. Mark Bernards

Ginseng cultivation is affected by ginseng replant disease (GRD) mainly due to the fungal root rot pathogen Ilyonectria mors-panacis (Imp). I'm studying the interaction between another root pathogen found in ginseng garden soil and Imp to see if it enhances disease symptoms in ginseng.

Elham Momeny: Extraction, partial purification, identification and characterization of lysosomal proteases from Newfoundland marine sources

Supervisor: Dr. Raymond Thomas

Due to the climate conditions in the Newfoundland region, enzymes derived from marine organisms have distinct biochemistry. This study focuses on marine-based lysosomal proteases with medicinal and industrial applications.

March 21, 2024

Mika Little: Investigating the contribution of different damping systems in spider leg joints

Supervisor: Dr. Natasha Mhatre

Spider legs contain systems that contribute to damping, the dissipation of energy over time, which is important for receiving vibration signals. I am investigating how much each system contributes to overall damping in the leg joints on Black Widow spiders.

Lauren Rego: Posttranslational modifications of mitochondrial proteins in hibernating thirteen-lined ground squirrels

Supervisor: Dr. Jim Staples

Thirteen-lined ground squirrels oscillate between two physiological states during hibernation: torpor and interbout euthermia. My research investigates posttranslational modifications as a potential driving force in changes to mitochondrial metabolism between these two states.

March 7, 2024

Jessica Sinka: Building Suberin: Timing is Everything but a Strong Foundation helps too

Supervisor: Dr. Mark Bernards

Suberin has two distinct domains: (1) phenolic (2) aliphatic. My data supports the phenolic domain being made first. Today we will explore the dynamics of carbon sharing between suberin domains and the importance of the phenolic domain.

February 15, 2024

Stefane Saruhashi: How do frozen crickets maintain mitochondrial function?

Supervisor: Dr. Brent Sinclair

Freezing compromises mitochondrial function in insects, yet mitochondria are robust against ice formation in freeze-tolerant crickets. Here we describe the changes in mitochondrial morphology and function that occur with freeze tolerance acquisition and freezing.

February 8, 2024

Alexander Harrison: Tetranychus urticae metabolic responses to Arabidopsis thaliana defensive phenylpropanoids

Supervisors: Dr. Vojislava Grbic and Dr. Mark Bernards

Arabidopsis phenylpropanoids offer a large family of secondary metabolites with uncharacterized roles in plant-spider mite interactions. My goal is to determine how mites respond to phenylpropanoid exposure on a metabolic level.

Kathryn Lamoureux: The effect of copper-induced oxidative stress on symbiosis between model legume Lotus japonicus and Mesorhizobium loti

Supervisor: Dr. Sheila Macfie

Legumes fix nitrogen with the help of symbiotic rhizobia. Excess copper causes stress in plants and reduces nodulation. I hypothesize that copper-induced oxidative stress is a mechanism for the breakdown of legume-rhizobia symbiosis.

February 1, 2024

Hossein Asgari: Variation in kinematics of black widow spider legs during locomotion.

Supervisors: Dr. Natasha Mhatre and Dr. Brent Sinclair

Irregularity of black widow cobwebs makes the task of locomotion complex for them. It's been hypothesized that they use their front legs as "feelers". I test this hypothesis by studying their leg movements during locomotion.

Eric Fordjour: The methods of manufacturing Nano-Bio Liquid Fertilizer from chaga mushrooms.

Supervisor: Dr. Raymond Thomas

The work establishes a protocol for industrial manufacturing of the organic nano-bio liquid fertilizer from Chaga mushroom, defined by its size and optical analysis. Indicating potential for sustainable use for crop production.

Le Anh Minh Nguyen: A multimodal analytical approach is important in accurately assessing terpene composition in edible essential oils

Supervisor: Dr. Raymond Thomas

Current workflow of terpen analysis is single, which can lead to missing some important terpenes of samples. I showed that more than one method is necessary to get more accurate and complete terpene profile of essential oils.

January 25, 2024

Grace Callahan: Applications of lipid bioinformatics in assessing environmental stress, skin health, and brain health.

Supervisor: Dr. Raymond Thomas

The advancement of lipidomics tools could act as a guide for decision making in assessing environmental stress response, the innovation of novel products, and validation of health benefits in improving skin and brain health.

Mina Esfandiari: The role of Peroxidase genes in suberin assembly in potato.

Supervisors: Dr. Mark Bernards and Dr. Sangeeta Dhaubhadel

Suberin is a polymer of phenolic and aliphatic domains deposited in the cell wall. Peroxidase genes polymerize polyphenolic domain. I will knockdown these genes in potato to understand their role in suberin assembly.

Amalie Hutchinson: The physiology of torpor in ruby-throated hummingbirds

Supervisors: Dr. Jim Staples and Dr. Chris Guglielmo

No more information.

Date Speakers
Thursday 8 February Alexander Harrison, Kathryn Lamoureux
Thursday 15 February Stefane Saruhashi
Thursday 22 February (no seminars) Reading week
Thursday 29 February Anka Colo, Kyle Hendricks
Thursday 7 March Jessica Sinka
Thursday 14 March Brynne Duffy
Thursday 21 March Mika Little, Lauren Rego
Thursday 28 March Yanira Jiménez Padilla
Thursday 4 April Betty Paton, Andrew Rabas
Thursday 11 April Olaide Ajibola (special virtual performance)
Thursday 18 April Arani Cuevas-Sanchez, Lorena Yeung