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Maheshi Dassanayake

Maheshi Dassanayake

Principal Investigator

Professor

Nisha Patwa

Nisha Patwa

Postdoctoral researcher

Samadhi Wimalagunasekara

Samadhi Wimalagunasekara

Graduate Student

After completing my Bachelor's degree at the University of Colombo, Sri Lanka, I began my Ph.D. journey in fall 2021 under the guidance of Dr. Dassanayake. My research is dedicated to exploring the remarkable adaptability of halophytes to high salt. Despite the considerable phylogenetic diversity within the halophyte community, these plants share a common adaptive trait of salt tolerance. Therefore, my project aims to uncover genomic traits that have convergently evolved in >250 extremophytes adapted to high salinity using bioinformatics techniques. Additionally, I am investigating functional responses to high salinity in the model halophyte Schrenkiella parvula, focusing on photosynthesis and responses related to the accumulation of reactive oxygen species. This endeavor not only promises to deepen our understanding of halophyte adaptation but also sheds light on broader questions surrounding adaptive mechanisms in response to environmental stress.

Thu Nguyen

Thu Nguyen

Graduate Student

I joined Dassanayake’s lab in 2021 Fall for my Ph.D. program. I finished my undergraduate and my MS in Biotechnology at Nong Lam University (NLU), Vietnam. I am interested in creating abiotic stress-tolerant plants, so working in this lab gives me the chance to fulfill my dream. I am currently working on molecular biology techniques like CRISPR to make transgenic/gene-edited lines with salt tolerance traits in two research model plants:  Arabidopsis thaliana, and Schrenkiella parvula.

Sara Armstrong

Sara Armstrong

Graduate Student

I joined Dr. Dassanayake’s lab in 2022 Fall as a Ph.D. student. I graduated from LSU with a bachelor’s degree in biology and a minor in geology in 2019. I am helping to pioneer a Planetary Geobiology Ph.D. program here at LSU, where I will be studying how plants grow and adapt to extreme environments with high levels of magnesium, like serpentine soils here on Earth and areas on Mars for future manned missions. I am also co-advised by Dr. Suniti Karunatillake of the Planetary Science Lab in the Geology and Geophysics Department here at LSU.

Richard S Garcia

Richard S Garcia

Graduate Student

Before I joined Dr. Dassanayake’s lab in Fall 2022, I had previously worked on agricultural crops such as rice, sorghum, maize and foxtail millet at International Rice Research Institute and LSU-Agricultural Center. I finished my BS in Biology and MS in Molecular Biology and Biotechnology at the University of the Philippines. Basically, I have been in plant science research for a while; also, I love plants. Right now, I want to realize my research ideas in understanding plant abiotic stresses for my PhD. Here at Dr. Dassanayake’s lab I will have that opportunity. I will be using brassica extremophyte species using transcriptomic, ionomic and metabolomic studies to understand the physiology, biochemistry and underlying mechanisms of plant abiotic stress tolerance.

Isabel  Johnson

Isabel Johnson

Graduate Student

I joined Dr. Dassanayake’s lab in the Fall of 2022 as a PhD student. I attained my undergraduate degree at Ohio Wesleyan University in May of 2022. I also completed work at the Boyce Thompson Institute at Cornell for an REU. In the Dassanayake lab, I am working with the halophytes Schrenkiella parvula and Eutrema salsaginium which are considered the experts at adapting to extreme environments such as soil with high salt and low essential nutrients like phosphorus. These stresses have been studied respectively, but often in nature these types of abiotic stresses occur at the same time. Studying extremophyte plants under these conditions  will give insight into how plants are adapted to high salt and low phosphorus conditions combined. I am using a plethora of transcriptomic tools to understand these two extremophytes' responses to complex stresses, and also studying physiological responses to the combined and singular stresses.

Jason Garcia

Jason Garcia

Graduate Student

I am a Biochemistry major minoring in Physics who joined Dr. Dassanayake’s lab in early 2021 as I found the transformation research they were doing really interesting. Since then I’ve been phenotyping the species Schrenkiella parvula, Eutrema salsugineum, and Arabidopsis thaliana when exposed to different concentrations of Na+.

Nicole Bisente

Nicole Bisente

Post-baccalaureate student 

Sylvie Bonner

Sylvie Bonner

Undergraduate Student

Hi! My name is Sylvie and I'm a Biology major in the LSU Ogden Honors College with a double minor in Philosophy and Sociology. My biggest reason for joining Dr. Dassanayake's lab is my interest in genetics, as well as having the opportunity to gain neat experience in research. After completing my undergraduate studies, my goal is to get into graduate school so I can continue to study subjects in the field of genetics. In my free time, I really enjoy spending time with my friends, binge watching shows or movies, and occasionally trying to teach myself how to cook.

Luke Guidry

Luke Guidry

Undergraduate Student

My name is Luke Guidry, and I am a biochemistry major who joined Dr. Dassanayake’s lab in Spring 2023. My main reason for becoming a part of Dassanayake’s lab was my interest in the mechanisms of gene expression, and how environmental factors can affect this expression. After I graduate, I hope to go onto medical school and become a physician.

Anamaria Bao-Loc-Trung

Anamaria Bao-Loc-Trung

Undergraduate Student

Through the LSU Explorers’ Program, I joined Dassanayake’s lab in 2023 Fall. I joined research because I wanted to gain experience working in a lab, expand upon my skills, and gather new opportunities at LSU. As a biology major in Pre-Health, I am always interested in science, hoping to foster more interest in various topics. Through Dassanayake’s lab, I am especially excited to collaborate with a team on research that is finding ways to protect food from the rising dangers of climate change. Outside of school, I really love reading, watching movies, and crocheting.

Jackson L Kirn

Jackson L Kirn

Undergraduate Student

I am an undergraduate majoring in biology here at LSU. The main reason I joined Dr. Dassanayake's lab in the fall of 2023 is to broaden my knowledge of genomics and gain useful research experience for the future. After college I plan on attending medical school and becoming a physician.

Former lab members

Former lab members

Past postdocs, graduate students, and lab managers 

  • Dr. Pramod Pantha, Postdoc (2021-2024), Graduate student (2015-2021)

  • Dr. Guannan Wang, Postdoc (2020-2023), Graduate student (2014-2020)

  • Chathura Wijesinghage, Graduate student (2016-2022)

  • Dr. Dong-Ha Oh, Research assistant professor (2013-2022)

  • Dr. Kieu-Nga Tran, Postdoc (2021-2022), Graduate student (2016-2021)

  • Dr. Narender Kumar, Postdoc (2015 - 2017) 

  • Swati Tyagi, Lab manager (2015 - 2017) 

  • Sandra DiTusa, Lab manager (2014-2015) 

  • Dr. Subbaiah Chalivendra, Postdoc (2013 - 2014)


Past undergraduate students

  • Hannah Holliday - 2023-2024 (Biology Major)

  • August R Antis - 2022-2023 (President's Future Leaders Research Program, Biology Major)

  • Jason Garcia - 2019-2023 (Biochemistry major)

  • Ashley Doan - 2019-2023 (Biology Major)

  • August Steinkamp  - 2019-2023 (President's Future Leaders Research Program, Biology Major)

  • Khadijah Taite - 2022-2022 (Biology Major)

  • Saad Chaudhari- 2018-2022 (Pre-med, biochemistry major)

  • Todd Thibodaux- 2018-2022 (Microbiology major)

  • Megan Guilbeau--2018-2021 (President's Student Aid, Biology Major)

  • Jordan Vivien-- 2016-2020 (President's Student Aid, Biology Major)

  • Christine Tran -- 2017-2020 (Biology Major)

  • Sravya Pochana- 2017-2018 (President's Student Aid, Biology Major)

  • Cally Quick- 2017-2018 (President's Student Aid, Biology Major)

  • Ashley Clement- 2017-2018 (Biology Major)

  • Delaney Campagna- 2016-2018 (Biology Major)

  • Lauren Taylor –2015 -2017, graduated Dec 2017 (Honors College; Chancellor's Aide; Biology Major)

  • John Johnson –2014 – 2017, graduated May 2017 (Honors College; Chancellor's Aide; Biochemistry Major)

  • Cameron Fleur –2015 -2017, graduated May 2017 (Biology Major)

  • Harel Schwartzberg – 2017 Spring (Biology Major)

  • Melody Salmanian - 2015-2017 (Honors College; Chancellor's Aide; Microbiology Major)

  • Matthew Johnson –2014 -2016, graduated May 2016 (McNair Scholar; BIOL 3999; Biology Major)

  • Madison Boudreaux – 2014 -2016, graduated May 2016 (BIOL 3999; Honors College; Chancellor's Aide; Biology Major)

  • Blake Delacroix –2015 Fall- 2016 Fall (Honors College; Biochemistry Major)

  • Trey Leiva –2016 Spring (Volunteer; Biology Major)

  • Sadie Thompson –2016 Spring (Volunteer; Biology Major)

  • Emily Asbury –2015 (BIOL 3999; Conservation Sciences Major)

  • Vaibhav Rajora - 2015 Fall (Physics major)

  • Kieu-Nga Tran – 2014-2015, graduated May 2015 (Biology Major)

  • Ross Kelt – 2014 -2015, graduated May 2015 (Biology Major)

  • Mary Bergeron- 2014 (Biology Major)

  • Kendall Dicke – 2013 (Engineering Major)

  • Stephanie Presedo (School of Veterinary Medicine)

  • Thuy-Mai Nguyen – 2013 Fall, graduated December 2013 (Biology Major)


Visiting scholars

  • Jorge A Parada - Post-baccalaureate student 

  • Michele F da Silva- University of Campinas (UNICAMP), Campinas, SP, Brazil ; Dissertation research; August, 2022

  • Dr. Patrick Finnegan – University of Western Australia; Sabbatical research; Oct – December 2017

  • Michelle Arland - Ben-Gurion University of the Negev, Israel - Ph.D. advisee of Gidon Winters and Simon Barak; Dissertation research; Jun-Sep 2017

  • Mariana Vargas Cruz - Univ. Est de Campinas, Brazil - Ph.D. advisee of Anete Pereira de Souza; Dissertation research; Feb – August, 2016

  • Gil Eshel – Ben-Gurion University of the Negev, Israel - Ph.D. advisee of Simon Barak; Dissertation research; Jan-Feb 2016

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