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plants growing in space have to cope

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with the physical realities of a

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microgravity environment where the lack

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of buoyancy driven convection can cause

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low oxygen conditions around the plant I

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spoke with one researcher who has grown

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plants on the space station inside a

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unique container what is brick it's not

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a brick like we think about on our house

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right though it's not brick means

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biological research in canister and it's

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a type of NASA hardware that's often

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been used to fly plants to the

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International Space Station there's five

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petri plates inside the shoe box sighs

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brick those petri plates are held in a

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petri dish fixation unit and the five

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petri plates also have a data logger

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which records the temperature inside the

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brick when you talk about growing plants

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in space this really excites people how

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did you get involved the growing lab is

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interested in studying plants responses

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to the environment and part of our

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expertise is looking at calcium changes

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in plant cells as they respond to

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different stresses so for example during

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low oxygen stress which is common on

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earth during flooding when flooding

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displaces the air spaces from the soil

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the roots experience low oxygen stress

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and this causes a lot of changes in gene

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expression and the ability for the plant

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to grow well so that naturally grew into

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the idea well if we can study plants on

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the space station in microgravity then

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there'll be some parallels to how plants

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are experiencing low oxygen stress on

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earth overall we've done a lot of these

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what have we learned what's the most

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important thing that we can take away so

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far after the plants are returned to

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earth we can study differences in gene

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expression so in addition to growing the

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plants on the space station we also grew

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plants at Kennedy Space Center on the

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earth to as a control so we can compare

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in parallel what's going on in the

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different environments and it turns out

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in space not only are the low oxygen

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stress

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genes upregulated like we had predicted

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but also a number of defense related

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genes including plant hormone signaling

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such as jasmonic acid and salicylic acid

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signaling genes are upregulated along

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with reactive oxygen species so all of

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these categories of genes indicate the

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plants are experiencing stress when

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they're in space flight but they're

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using the tools they have at hand the

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changes in gene expression to be able to