Received for publication 24 Sept. 1984. Scientific Paper No. 6937. Washington State Univ., Agr. Res. Center, Pullman, WA 99164-6414. Project 0322. The assistance of C.L. Chu in obtaining respiration and ethylene data is gratefully acknowledged. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.