|Explore||Here on earth, plants and seeds are some of the top needs for survival of life. Seeds are not only edible, like soybean and sunflower seeds, but they also help plants reproduce and grow more. If we did not have them, plants wouldn’t be able to keep growing, and they would eventually die. Seeds...|
|Research Question||How do different pH levels affect seed growth?|
|Predictions||We think that if we water the plants with higher pH levels it will slow down the plant growth. If the plant is water with water of a lower pH level, the growth of the plant will quicken, or not be affected.|
|Experimental Design||Soak soybeans in tap water (7pH) for 12 hours. Spread the seeds out evenly between 4 groups. Each group will be watered with water that has different levels of pH (7.00, 9.18, 4.000). Every Friday, measure the growth of the stem. We want to see which group of seeds grow the most,...|
|Conclusion||Our prediction was incorrect, the plants with the lower level of PH (4.00) grew better than the plants with higher PH (9.18), but the plants that grew the best were our control that we watered with tap water (7.00 PH). One theory that we have about why the plants watered with more acidic water...|
As this research project is now in the final stages of wrapping-up, we wish to thank everyone who participated in this inquiry; the students, mentors, teachers and others behind the scenes. We appreciate all of your efforts and contributions to this online learning community.
Scientific exploration is a process of discovery that can be fun! There are many unanswered questions about plants just waiting for new scientists to consider, investigate, and share.
Please come back and visit the PlantingScience Project Gallery anytime to view this project in the future. You can search the Gallery by key word, team name, topic, or school name.
Good bye for now.
The PlantingScience team
If you will connect those dots in the scatter plot it would be more interactive. What you have measured here is the length of the hypocotyl. So, more appropriately you have measures the growth of the seedling under different pH condition. You may label the Y-axis as the length of the hypocotyl. The whole purpose of doing the experiment is to falsify your own hypothesis and unravel the real phenomena. I am glad that within this short time you all have made it to a conclusion and found that pH 7.0 is the appropriate pH for seedling growth and changing the pH value to higher (pH 9.18) or lower (pH 4.0) severely reduces seedling growth. So, pH is an important factor for plant growth and it is true for other living organisms. If we mess up the water bodies around us with the pollutant, that will change the pH and have serious consequences not only on plants growing in that condition but also other living organisms growing in that ecosystem. I hope you all now learn the larger message from this small but very important experiment.
My research primarily focused on two aspects of plant development. First, the effect of a transcription factor on seed germination and second, mechanism of light perception by the plant. The importance of my research is to understand the basic mechanism that governs these developmental processes. The knowledge gained from this research can be implicated to crop improvement in the future. I have attached an example data from the seed germination experiments. I would be happy to discuss more if you have any question.
Thanks All and Good Luck!
It was amazing to work with you this couple of weeks! You do a great job of educating us and you really helped out when making this project! I'm really interested in the science you do, and it would be awesome to learn more about your research! I am really thankful for you, and planting science, because I had a great time working on this experiment, and learning and answering our question, "How does the pH of water affect the growth of seeds?". Sadly, our project is ending, and we will not be able to continue for much longer. If you have any questions or if you can tell me a bit more about your research, I'll stick around! Thank you for being an amazing mentor and helping us with our project!
Thanks so much!
Team Ten: Thijs, Shana, Elizabeth, and Ryleigh.
Hi Elizabeth, Ryleigh, Shana, and Thijs,
The slides reflect that you all have done a great job with the help of your teacher. Thanks, everyone for your effort and making this project a success. I am glad that I got an opportunity to work with you. I requested the access for the data table and scatter plot. If you received my request please give me the access, or upload that into group files in planting science website. Alternatively, take a screenshot of those files and paste them to your PPT slides.
It’s great to see that teams from your school are wrapping up and posting conclusions. Enjoy the final stages of your project, and feel free to post any final comments or questions you have for your mentors.
Do you have a google account we could share the slides with you on?
We have just started analyzing our data, and we will be making charts and writing our conclusion! We are currently working on a google slides showing our entire experiment, and when we're done, you can check it out! I'm also going to be attaching some files and pictures to this project so you can see what we found.
Today is the last day for data collection! We are measuring the plant height and the number of leaves. We also collect other data, like other interesting things or observations of the plants. We actually have these amazing journals where we made graphs of the inside of seeds! We even got to dissect them! The stem is called the Hypocotyl, and the organ is called the Plumule. I actually did have an explanation for the seeds failing in 9.13. I also learned that the higher base the water is, the more saline content it has, or mineral. I know salt kills plants, so that could by why.
Our plants have started to grow!!! We have noticed that the plants that are watered with regular water (7pH) and 4.00 pH levels are growing better than the plants watered with 9.18 pH levels. We think that the plants watered with more acidity grow faster than the plants watered with more basic water. The picture we sent represents a seed germinating.
Elizabeth, Ryleigh, Shana, Thijs
I took a picture of our first germinating seed! This shows that we are doing the right thing and using the correct amount of water! We watered it with 9ml with water, so now we know that it is a good amount of water to use! We now have a 3cm plant growing, as well as many others! Looking forward to what we find in the end!
Yesterday we watered our seeds with 6ml of water. Today we watered our seeds with 9ml of water because the seeds were taking a while to germinate. We had another cup with extra seeds (not part of the project) and many of those seeds were germinating. I think they were growing more, because they were watered with more water. We are using pH buffer powder, usually used for fish tanks.
There are 4 cups in each group (3 groups total) and each cup has 2 seeds. (8 seeds total in each group.) Is that enough to have an accurate measurement? We will be measuring the height of them stem.
Today my group started our project. We have three groups, each group has 4 cups (2 seeds in each cup) We watered each group with water that had different PH levels. We are going to check them next week, on Thursday to check on the growth of the soybeans.
My group is testing how different levels of PH will affect the growth of the plant. Each container of seeds will be watered with different PH levels. Every Friday, we will measure and compare the hights of the seeds. We think the container of seeds that is watered with higher PH levels will take longer to grow than the seeds that are watered with lower PH levels. We let more than 15 seeds soak, so my group may decide to use more than 5 seeds in each container.
Elizabeth, Shana, Ryleigh, Thijs.
Hello Swadhin. We had a long weekend, so we didn't have time to update our activity.
In class, we have been filling out a worksheet, to show the process of our experiment. Our teacher found some powder to lower and raise the PH level. We are going to add this to tap water. (PH level of 7) Here is our procedure:
1. soak 15 soybeans in tapwater for 12 hours
2. spread seeds out into 3 containers. (5 seeds in each container)
3. every Friday, measure the height of the stem.
My group is using soybean for our seed. We decided to change our experiment. We are going to measure the PH levels in different types of water. A week ago we disected a lima bean seed, and looked at the different parts of it. Today we did research on the soybean. We found that it is a species of legume native to East Asia.
I gave a simplistic overview of the experimental method in the previous post. You might do it in a different way. Let's discuss the detailed plan. First, what is your hypothesis that you are going to test? What are the experimental plans? How do you record the observations? How do you interpret the result?