Paper Title
Growth Kinetic Analysis of Grey Oyster Mushroom (Pleurotus Pulmonarious) Spore Induction Spawn from Various Preservation Treatments

Abstract
Mushroom spawns is easily spoiled upon maturation and has limited storage duration. A study was conducted to determine a reliable preservation technique for Pleurotus pulmonarious spawn in aspect of maximum specific growth rate and doubling time derived from growth kinetic profiling and contois kinetic model. The spawn, which prepared by spore induction technique was compared with the preserved spawn using cryopeservation, lyophilization and 4OC refrigeration techniques. The untreated spawn as expected exhibited higher growth rate which is 0.22d-1. This is followed by lyophilized (0.148 d-1), cryopreserved (0.148 d-1) and 4OC refrigerated (0.113 d-1) spawn. Lyophilization technique is considered a relible preservation technique without significantly destroyed the biochemical content of the spawn.. Index Terms - Lyophilization, Cryopreservation, Growth kinetic, Doubling time, Grey oyster mushroom.