Abstract: The changes of physiological and biochemical indexes under the conditions of low pressure were studied. The resultshowed that hypobaric storage slowed down markedly respiratory rate and the loss rate of VC. Hypobaric storage could inhibitthe decrease of firmness, the losses of water and the decrease of soluble sugar. The activity of Superoxide dismutase (SOD) wasrelatively strong with hypobaric storage, and the activity of catalase (CAT) were suppressed remarkably under hypobaricstorage.

Key words: Huanghua pear, hypobaric storage, physiological and biochemical indexes