![]() ✅ Pinheads and primordia form a few days earlier. ✅ Cold shock stimulates the fruiting phase: pinheads and primordia formation. Such rehydration with cold shock is sometimes practiced before each flush of fruiting. In this way, cold shock and rehydration of the mushroom cakes is carried out at the same time. There are 2 options for implementing a cold shock.ġ️⃣ Cover the mushroom cakes after colonizing the substrate and completing the colonization of the casing layer and place in the refrigerator at +2☌ to +4☌ (35-39☏) for 12-24 hours.Ģ️⃣ Pour cold water over the mushroom cakes, cover with a lid so the cakes are completely submerged, and place in the refrigerator at +2☌ to +4☌ (35-39☏) for 12-24 hours. The conditions and results will be presented in this section. That's why we decided to conduct our own experiment «Cold Shock by Shroomok». ![]() But often the conclusions are based on hypotheses and guesswork. There are a million discussions about temperature shock for psilocybin mushrooms in forums. Temperature shock, whether it is a heat shock or a cold shock, affects the productivity of warm-weather strains and cold-weather strains differently. He also found that the effectiveness of temperature shock depends on the genetics. Thus, for shiitake, heat shock (at +37☌ or 99☏ for 3 hours) increased the speed of pinhead formation, while cold shock (at +4☌ or 39☏ for about 12 hours) increased the number of pinheads and overall yield (compared to the inhibitory effect of non-temperature stresses with salts and ethanol in his study). He found the stress gene, which was a trigger for fruiting initiation. P rofessor Tjia Wai Mui used different strains of shiitake in his researches: The temperature during pinning is also critical for maximum yields and mushroom shape (Ohira et al., 1982).Ī detailed study of stress factors can be found in "Effect of Stress on Fruit Body Initiation of Shiitake Mushroom Lentinula edodes" by professor Tjia Wai Mui (The Chinese University of Hong Kong, 2002). Komatsu (1961) showed that pinning is induced by a sudden shift in temperature or by a period of fluctuating temperatures. Many researchers indicated that temperature also plays a very important role in pinning and fruiting. ![]() The cold shocking and heat shocking techniques came from experiments of various kinds of stresses on edible mushrooms. Including their natural climatic conditions where they grow in the wild. The limits of temperature sensitivity of different fungal species depends on their genetics. However, prolonged exposure at temperatures above 35☌ can also kill the mycelium (Tokimoto et al., 1982).ĭeveloping mushrooms will tolerate freezing temperatures for short periods of times, but can be damaged or killed by prolonged exposure (Tokimoto et al., 1982). Mycelium perishes at high temperatures around 45☌ (Tokimoto and Komatsu, 1978). The survival of fungi is determined by temperature but also exposure time. Temperature is one of the most critical factors in cultivation of any kind of fungi as it affects survival, growth rate, time of fruiting, yields, molecular changes in protein structure and even mushroom morphology. Scientific studies on the effect of temperature shock This works as some kind of trigger, so that the mycelium understands that it has been taken out of its comfort zone and needs to form the reproductive organ of the fungus - the fruit body to spread spores as soon as possible and continue its fungal lineage. Heat Shock - is a procedure when the colonized mushroom cake with a casing layer is stressed by raising the temperature - for 3 hours at +35☌ to +37☌ (95-99☏) before introducing it to the fruiting conditions. What is cold shock and heat shock?Ĭold Shock - is a procedure when the colonized mushroom cake with a casing layer is stressed by a sudden drop in temperature - for 12-24 hours in the refrigerator at +2✬ to 4✬ (35-39☏) before introducing it to the fruiting conditions. Let's figure out what is Cold Shock? What is Heat Shock? Why and how to proceed Cold Shock? Advantages and disadvantages of such methods. That's why it's highly debated topic online.įor each «pro» and «contra» there is its own logical argumentation. There are a number of positive and negative effects of temperature shock (cold shock and heat shock). Temperature shock method is used for pinhead initiation and for increasing yield. ![]() Another part of growers are vehement opponents of such approach. ![]() Cold shock and Heat shock in mushroom growing Temperature shock: pros and consīefore moving mushroom cakes in fruiting chamber, some growers proceed Cold Shock (Cold Shocking), less common - Heat Shock. ![]()
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