NUTRITIONAL AND FLAVOR COMPONENTS OF BRASSICA RAPA L. GROWN ON ISS

摘要

Brassica rapa L. cv. 'Astroplants' were grown on the International Space Station during April -June 2002 in the Biomass Production System. Plants were manually pollinated and were maturing seeds when they were harvested for preservation in flight by fixation or freezing. Overall growth and development were comparable between flight and ground control plants. Chlorophyll and carbohydrate content of the leaves were the same in the two treatments. Although comparable numbers of seeds were produced inside the seed pods, the developing seeds from the spaceflight treatment had only half of the dry weight of the ground controls and had altered storage components. Glucosinolate content of the stem tissue was also determined. The concentration of 3-butenyl-glucosinolate was on average 75% greater in the spaceflight samples than in the ground control. The results demonstrate how the spaceflight environment influences nutritional and flavor characteristics of a potential crop for use in a Biological Life Support System.