add plant growth study

studies/PlantGrowth/protocols/Protocol-Growth.md

+## Plant Growth Protocol Overview
+
+The recommended protocol to grow seedlings in RoPods is presented in the Supplementary Methods. To reuse the chambers, the growth medium was gently removed using a Q-tip, the chambers were washed with cold water and dish soap, or in 1% SDS, abundantly rinsed with tap water followed by rinsing with MilliQ water, air dried and sterilized for 1 h under UV light. Alternatively, chambers were sterilized by incubating for 40 min in 70% ethanol, followed by overnight drying in the sterile bench.
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