A zinc finger suppressor involved in stress resistance, cell wall integrity, conidiogenesis, and autophagy in the necrotrophic fungal pathogen Alternaria alternata

Lu, Hsin-Yu; Wu, Pei-Ching; Wei, Xian-Yong; Yago, Jonar I.; Chung, Kuang‐Ren

doi:10.1016/j.micres.2022.127106

Cited by 1 publication

(2 citation statements)

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“…Autophagy and autolysis are extreme and effective ways for filamentous fungi to quickly obtain nutrients and cell materials under nutrient deficiency. Extreme nutrient deficiency will activate or promote the massive expression of genes related to autophagy, autolysis, and asexual sporulation in filamentous fungal cells [ 27 , 28 , 29 ]. For example, in Aspergillus nidulans , carbon starvation will induce the synthesis of a large number of proteases to promote cell autolysis [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…In addition, flbD is also involved in the response to nitrogen starvation, and its expression is significantly increased under carbon starvation [ 38 ]. On the basis of the above bioinformatic and RT-qPCR analysis results and relevant references [ 18 , 19 , 23 , 24 , 25 , 28 , 31 , 37 , 38 , 39 , 40 , 41 , 42 ], the molecular regulatory mechanism underlying the asexual sporulation of A. cinnamomea induced by nutrient limitation was predicted ( Figure 5 ).…”

Section: Resultsmentioning

confidence: 99%

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Comparative Transcriptomic Analyses Reveal the Regulatory Mechanism of Nutrient Limitation-Induced Sporulation of Antrodia cinnamomea in Submerged Fermentation

Luo

et al. 2022

Foods

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Antrodia cinnamomea is a precious edible and medicinal mushroom with various biological activities, such as hepatoprotection, antitumor, antivirus, immunoregulation, and intestinal flora regulation. However, the wild fruiting bodies of A. cinnamomea are scarce and expensive. Submerged fermentation based on spore inoculation has become the most efficient and popular artificial culture method for A. cinnamomea. In order to complement the mechanism of asexual sporulation of A. cinnamomea in submerged fermentation, and provide a theoretical basis to further improve the sporulation, comparative transcriptomics analysis using RNA-seq and RT-qPCR were conducted on A. cinnamomea mycelia cultured under different nutritional conditions to reveal the regulatory mechanism underlying the asexual sporulation induced by nutrient limitation. The obtained mechanism is as follows: under nitrogen starvation, the corresponding sensors transmit signals to genes, such as areA and tmpA, and promote their expression. Among these genes, AreA has a direct or indirect effect on flbD and promotes its expression, further enhancing the expression of brlA. Meanwhile, TmpA has a direct or indirect effect on brlA and promotes its expression; under carbon starvation, transport protein Rco-3, as a glucose sensor, directly or indirectly transmits signals to brlA and promotes its expression. BrlA promotes the expression of abaA gene, which further enhances the expression of wetA gene, and wetA then directly leads to asexual sporulation and promotes spore maturation; meanwhile, gulC can also promote cell autolysis, which provides energy and raw materials for sporulation.

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