The effect of a microgravity (space) environment on the expression of expansins from the peg and root tissues of Cucumis sativus.

Abstract

In young cucumber seedlings, the peg is a polar outgrowth of tissue that functions by snagging the seed coat, thereby freeing the cotyledons. The development of the peg is thought to be gravity-dependent and has become a model system for plant-gravity response. Peg development requires rapid cell expansion, a process thought to be catalyzed by alpha… (More)

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