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首页> 外文期刊>Biochemical Engineering Journal >Colonization of solid particles by Rhizopus oligosporus and Aspergillus oryzae in solid-state fermentation involves two types of penetrative hyphae: A model-based study on how these hyphae grow
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Colonization of solid particles by Rhizopus oligosporus and Aspergillus oryzae in solid-state fermentation involves two types of penetrative hyphae: A model-based study on how these hyphae grow

机译：固态发酵中低聚根霉和米曲霉对固体颗粒的定殖涉及两种类型的穿透性菌丝：基于模型的研究，这些菌丝如何生长

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摘要

Among all hyphal types formed on substrate particles during solid-state fermentation, penetrative hyphae are the least studied. Important questions regarding penetrative hyphae remain to be answered: for example, what determines the final length of a penetrative hypha and why do some fungi produce two types of penetrative hyphae, long and short penetrative hyphae? In this work, we develop a discrete model to describe the biomass distribution of penetrative hyphae as a function of depth inside solid particles and apply this model to Rhizopus oligosporus and Aspergillus oryzae, growing in different media. We use our model to suggest different modes of growth and roles for long and short penetrative hyphae: the long ones, also called scouting hyphae, explore the composition of the particle and search for new colonization sites across the particle, while the short hyphae, also called vegetative hyphae, act as anchors for the colony and as enzyme producers. The same factors, namely the firmness of the solid particle and the pressure drop inside the hypha, may determine the final hyphal length of both hyphae. Scouting hyphae may be longer due to a lower pressure drop along the hypha. These hypotheses regarding growth of penetrative hyphae now require experimental investigation. (C) 2016 Elsevier B.V. All rights reserved.
机译：在固态发酵过程中在底物颗粒上形成的所有菌丝类型中，对穿透菌丝的研究最少。关于穿透性菌丝的重要问题仍有待回答：例如，什么决定穿透性菌丝的最终长度，以及为什么某些真菌会产生两种类型的穿透性菌丝，长而短的穿透性菌丝？在这项工作中，我们建立了一个离散模型来描述穿透性菌丝的生物量分布，它是固体颗粒内部深度的函数，并将该模型应用于在不同培养基中生长的低聚根霉和米曲霉。我们使用我们的模型来建议长短穿透菌丝的不同生长方式和作用：长长菌丝，也称为球菌菌丝，探索颗粒的组成并在整个颗粒上寻找新的定居点，而短菌丝也被称为营养菌丝，充当菌落的锚点和酶的产生者。相同的因素，即固体颗粒的硬度和菌丝内部的压降，可能会决定两个菌丝的最终菌丝长度。由于沿菌丝的压降较低，因此探测菌丝的菌丝可能更长。这些有关穿透性菌丝生长的假说现在需要进行实验研究。 （C）2016 Elsevier B.V.保留所有权利。

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