Effect of Temperature on Mung Bean Growth Rate

Abstract

With the rise of average global temperatures, its effects on plant growth should befurther examined as plants are an integral part of life by providing oxygen, nutrients as food,and even shelter, to name a few (World of Change: Global Temperatures). Temperature is oneof the primary factors in plant development, and as such we aimed to examine the effect oftemperature on the growth rate of mung beans as they are a common food in diets throughoutAsia. Previous research has shown that increasing mean temperatures increased the rate ofgrowth in mung beans, given that the temperatures were not greatly exceeding 28° C(Aggarwal et al., 1977). Thus, we hypothesized that there would be a difference in mungbean growth dependent on temperature, with the warmer environment yielding the fastest ratedue to hotter temperatures, allowing the seed coating to tear and embryos within to plumpout. Using three different environments (cold 3° Celsius, room temperature 25° C , andwarmer 30° C), we placed mung beans in plastic ziploc bags and observed theirgrowth over the span of 10 days. Each day, a ruler and string were used to measurethe mung beans from the different environments and the data was recorded intothree tables, one for each environment (see Appendix A). Growth of the sproutsranged from 0cm - 20cm, and average growth for the warmer environment was17.33cm, 14.67cm for the room temperature environment, and 0.067 for the coldenvironment. Taking the averages of growth in each environment, a one way ANOVAtest was used and the variation between the three groups were deemed to bestatistically significant (p-value=0.0001,⍺=0.05). Our findings agreed with previousresearch and we rejected the null hypothesis. The growth rate of mung beans wasfastest in the warmer environment, with the optimal temperature ranging from 26 - 33° C for our particular experiment. Limitations may have included uneven distribution ofwater per mung bean, nonuniform temperature per bean as some beans may have been <1cmfarther from the heat source than others, and space limitations for each mung bean to properlygrow.

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