The Continuation of Spines from Tatooine

Over the course of my time left in SSTEM, I still plan on continuing my research of cholla spines. I hope to sequence my bands in the future at ASU, and I hope to have some concrete results about Cylindropuntia bigelovii reproduction. I now have a solid idea of what method to use and what primers work best for the teddy-bear cholla DNA. I have found some new prospective people to work with, and their additional help to my project will help further guide me to the results I hope to gain from this research. This summer is going to be pretty hectic, but I cannot wait to return back in the fall to poke myself with these spines again. 

 <3

EMCC Presentation of Tusken Spines

Today I did an oral presentation on the work I have been doing in the lab. I presented the best method, in my experiment, to extract DNA from cholla spines. The best method for the extractions was by using the ZYMO™ Plant DNA kit. The best primers to use were the Universal Rice primers because they actually amplified the DNA, and I was able to see banding. It was a good experience and my last at an EMCC conference. Now I am on to creating a poster for the final presentations at Metro Tech. I will be going with a tan outline of my poster and not so much blue. I hope it does not hurt anyone’s feelings here at Phoenix College.

The Sand People Emerge

This week I was able to determine what were the best methods in going about extracting DNA from the cholla spines I collected. Below are results from prickly pear cactus spines and how their banding looked after two extraction methods, but both extraction methods ran with the same Universal Rice Primers. I cannot wait to exert these methods upon the teddy-bear cholla spines collected from Dreamy Draw.

These are the gels from the first DNA extraction from the kit ran with Universal Rice Primers 1-4:

These are the gels from the first DNA extraction with InstaGene matrix ran with Universal Rice Primers 1-4:

As you can see, both DNA samples are amplified, but the better banding results from the first extraction method.

Collecting Tusken Spines from Tusken heads

The day right before spring break was a blast! My mentors and my SSTEM peer Lucas traveled through Dreamy Draw for a nice, early hike. We saw some pretty interesting insects, including a Gila monster. We found some nice Cylindropuntia bigelovii populations and we were able to collect some spines for my DNA extraction. I wish more people had gone to experience what a great time we had. I was pretty worn out by the end of the trip and wanted to crash out. It was all worth it though since I had gotten the spines I needed. 

Here is a video of us finding the Gila monster:

Another PCR Run with Tusken Raider Spines

This week I ran another PCR with my DNA samples with the same chloroplast primers. The first PCR run included 10 microliters of distilled water, 10 microliters DNA samples, and 20 microliters of the plant master mix that included the chloroplast primers. The only changes to the protocol was increasing the amount of water to 15 microliters and changing the amount of DNA sample to 5 microliters. The amount of plant master mix into the PCR tube stayed the same. The idea was for the primers to have a higher chance of targeting the small amount of DNA to increase amplification. The result of this PCR after electrophoresis  is presented below in this gel:

We assumed the ladder ran off a bit weird due to how the gels were made. I'll need to run another fresh gel with my PCR samples. For the mean time, I'll be working on amplifying the DNA samples with other primers in the lab that include primers 1-7.

Harvesting from Multiple Tusken Raiders & Amplification

 Before spring break, I was able to collect spines from a population of teddy-bear cholla (cylindropuntia bigelovii) at the dreamy draw hike. Below are some pictures of the population of cholla cacti, and both of my mentors got in my way.

I ran a PCR on my five samples with chloroplast primers and the results were not what I expected. Since I did not know what kind of primers were in the master mix, I did not know which primer to avoid when running a PCR with the
DNA samples. The next step was to run a RAPD PCR with primers we have in the lab to see if the amplification would be better than the amplification from the Chloroplast primers. Below is a gel of the DNA samples amplified with the chloroplast primers.

 Here is also a video of one of our top highlights at the Dreamy Draw hike:

The Future of the Tusken Raider Spines

This week I was able to run a gel on five samples of DNA I have extracted. The most recent extraction was of prickly pear spines for which I changed the protocol by the time I conducted the extraction. The sample was cleaned in twine and bleach before it was heated for three hours at 70 degrees Celsius. I ran the sample along with four others, including the control, but I was not able to see any bands. The control sample of Trifolium sp. had a band in the first lane, but the rest of the cactus spine samples did not. The next step is to run a PCR and I hope to see DNA banding after the PCR samples undergo electrophoresis. Here is my gel below: