铜对平菇生长发育、品质和铜含量的影响

Effect of Copper on Growth and Development,Fruiting Body Quality and Copper Content of Pleurotus ostreatus

为了探明平菇对Cu胁迫的响应机制,研究了培养料中添加不同质量浓度Cu对平菇菌丝生长、原基诱导时间、产量、子实体品质和Cu含量的影响。结果表明,Cu对平菇菌丝生长、原基诱导时间、产量、子实体氨基酸、蛋白质、粗脂肪含量的影响具有显著的浓度效应。Cu质量浓度为1 500 mg/kg时,平菇菌丝生长速度最快,且原基比对照早2 d出现;Cu质量浓度为500 mg/kg时,平菇产量(干质量)最高;Cu质量浓度为1 000 mg/kg时,子实体氨基酸、蛋白质、粗脂肪含量均最高,分别为16.00%、24.88%、2.34%。而子实体菌柄和菌盖中Cu含量随着培养料中Cu质量浓度(0~3 000 mg/kg)的升高而增加。

Mycelial growth , primordia formation, yield, fruiting body quality and copper content were stud-ied under different concentrations of copper so as to explore the response mechanism to copper in Pleuro-tus ostreatus. The results showed that the effects of copper on mycelial growth, primordia formation, yield, contents of amino acid,total protein and crude fat were significantly concentration-dependent. The growth speed of mycelia had maximum value and primordial formation was 2 days earlier than that of control un-der 1 500 mg/kg of copper. The yield （dry weight） was the highest under 500 mg/kg of copper. The con-tents of amino acids, total protein and crude fat all reached maximal values under 1 000 mg/kg of copper, which were 16. 00% ,24. 88% and 2. 34% respectively. However,the copper contents in stipe and pileus gradually increased with the increase of copper concentration（0-3 000 mg/kg）.