![](https://static.igem.org/mediawiki/2021/a/ae/T--NCHU_Taichung--Model_cover.png)
Model
Purpose
Since the impetus to quantifying plant growth rate related to the efficiency of biostimulant, we exploit relative growth rate (RGR) which mathematically should be written as:
![](https://static.igem.org/mediawiki/2021/2/29/T--NCHU_Taichung--math01%282%29.jpg)
and expand to
![](https://static.igem.org/mediawiki/2021/a/a0/T--NCHU_Taichung--model_math02.png)
then in the case of two harvest, our equation [1] could calculate as:
![](https://static.igem.org/mediawiki/2021/9/90/T--NCHU_Taichung--model_math03.png)
As known M1 (unit:g), by using equation [2]&[3], for each rice, we'll get a predicted M2 (unit:g), the alternative mass of rice, and then we calculate the relative deviation between each treatment and the control as the X value and also calculate the relative deviation between exact M2 (unit:g)and the control as the Y value.
![](https://static.igem.org/mediawiki/2021/9/9e/T--NCHU_Taichung--model_math04.png)
Among these, "a" represents any treatment group.
Using linear regression, our mean value of exact M2 (unit:g)are fit in both the prediction one and the one of respective data, which could not only well explain the better concentration to dilute the supernatant from Bacillus subtilis RM125/PQQ culture in straw liquid but well evaluate the plant mass and the total rice harvest further.
![](https://static.igem.org/mediawiki/2021/c/c5/T--NCHU_Taichung--model_fig01.png)
![](https://static.igem.org/mediawiki/2021/f/f9/T--NCHU_Taichung--model_fig02.png)
![](https://static.igem.org/mediawiki/2021/b/ba/T--NCHU_Taichung--model_fig03.png)
![](https://static.igem.org/mediawiki/2021/4/43/T--NCHU_Taichung--model_fig04.png)
![](https://static.igem.org/mediawiki/2021/e/e8/T--NCHU_Taichung--model_fig05.png)
![](https://static.igem.org/mediawiki/2021/e/e0/T--NCHU_Taichung--model_fig06.png)
![](https://static.igem.org/mediawiki/2021/0/06/T--NCHU_Taichung--model_fig07.png)
![](https://static.igem.org/mediawiki/2021/6/66/T--NCHU_Taichung--model_fig08.png)
Reference
- Poorter, H. (2002). Plant Growth and Carbon Economy. In eLS, John Wiley & Sons, Ltd (Ed.).