Light is an important signal for fungi in the environment and induces many genes with roles in stress and virulence responses. Conidia of the entomopathogenic fungi Aschersonia aleyrodis, Beauveria bassiana, Cordyceps fumosorosea, Lecanicillium aphanocladii, Metarhizium anisopliae, Metarhizium brunneum, Metarhizium robertsii, Simplicillium lanosoniveum, Tolypocladium cylindrosporum, and Tolypocladium inflatum were produced on potato dextrose agar (PDA) medium under continuous white light, on PDA medium in the dark, or under nutritional stress (= Czapek medium without sucrose = MM) in the dark. The conidial tolerance of these species produced under these different conditions were evaluated in relation to heat stress, oxidative stress (menadione), osmotic stress (KCl), UV radiation, and genotoxic stress caused by 4-nitroquinoline 1-oxide (4-NQO). Several fungal species demonstrated greater stress tolerance when conidia were produced under white light than in the dark; for instance white light induced higher tolerance of A. aleyrodis to KCl and 4-NQO; B. bassiana to KCl and 4-NQO; C. fumosorosea to UV radiation; M. anisopliae to heat and menadione; M. brunneum to menadione, KCl, UV radiation, and 4-NQO; M. robertsii to heat, menadione, KCl, and UV radiation; and T. cylindrosporum to menadione and KCl. However, conidia of L. aphanocladii, S. lanosoniveum, and T. inflatum produced under white light exhibited similar tolerance as conidia produced in the dark. When conidia were produced on MM, a much stronger stress tolerance was found for B. bassiana to menadione, KCl, UV radiation, and 4-NQO; C. fumosorosea to KCl and 4-NQO; Metarhizium species to heat, menadione, KCl, and UV radiation; T. cylindrosporum to menadione and UV radiation; and T. inflatum to heat and UV radiation. Again, conidia of L. aphanocladii and S. lanosoniveum produced on MM had similar tolerance to conidia produced on PDA medium in the dark. Therefore, white light is an important factor that induces higher stress tolerance in some insect-pathogenic fungi, but growth in nutritional stress always provides in conidia with stronger stress tolerance than conidia produced under white light.

光是环境中真菌的重要信号，可诱导许多在胁迫和毒力反应中起作用的基因。在昆虫病原真菌的分生孢子座壳孢壳孢，球孢白僵菌，虫草fumosorosea，蜡蚧aphanocladii，绿僵菌，绿僵brunneum，绿僵robertsii，Simplicillium lanosoniveum，弯颈cylindrosporum和多孔木霉在连续白光下在马铃薯葡萄糖琼脂 (PDA) 培养基上、在黑暗中在 PDA 培养基上或在黑暗中在营养胁迫下（= 不含蔗糖的 Czapek 培养基 = MM）产生。在这些不同条件下产生的这些物种的分生孢子耐受性在热应激、氧化应激（甲萘醌）、渗透应激（KCl）、紫外线辐射和由 4-硝基喹啉 1-氧化物 (4-NQO) 引起的遗传毒性应激方面进行了评估. 与在黑暗中相比，在白光下产生分生孢子时，一些真菌物种表现出更大的胁迫耐受性；例如，白光诱导A. aleyrodis对 KCl 和 4-NQO具有更高的耐受性；B. 球茎到 KCl 和 4-NQO；C. fumosorosea对紫外线的照射；海葵加热和甲萘醌；M. brunneum对甲萘醌、氯化钾、紫外线辐射和 4-NQO；M. robertsii对热、甲萘醌、氯化钾和紫外线辐射；和T. cylindrosporum到甲萘醌和 KCl。然而，在白光下产生的L. aphanocladii、S. lanosoniveum和T. inflatum 的分生孢子表现出与在黑暗中产生的分生孢子相似的耐受性。当在 MM 上产生分生孢子时，发现球孢菌对甲萘醌、KCl、紫外线辐射和 4-NQO 的胁迫耐受性要强得多；C. fumosorosea对 KCl 和 4-NQO；绿僵菌种类对热、甲萘醌、氯化钾和紫外线辐射；圆柱孢霉甲萘醌和紫外线辐射；和T. inflatum热和紫外线辐射。同样，在 MM 上产生的L. aphanocladii和S. lanosoniveum 的分生孢子与在黑暗中在 PDA 培养基上产生的分生孢子具有相似的耐受性。因此，白光是一些昆虫病原真菌诱导较高逆境耐受性的重要因素，但营养胁迫下的生长总是为分生孢子提供比白光下产生的分生孢子更强的逆境耐受性。