Pop-Moldovan Victoria, Corcoz Larisa, Stoian Valentina, Moldovan Cristina, Pleșa Anca, Vâtcă Sorin, Stoian Vlad, Vidican Roxana
Department of Microbiology, Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Cluj-Napoca, Romania.
Department of Plant Physiology, Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Cluj-Napoca, Romania.
Front Plant Sci. 2022 Nov 17;13:1052066. doi: 10.3389/fpls.2022.1052066. eCollection 2022.
Agronomic inputs and technologies, especially fertilizers, act on the evolution of the symbiotic partnership between arbuscular mycorrhizal fungi and cultivated plants. The use of the MycoPatt method for the assessment of mycorrhizas in maize roots leads to the extraction of large parameter databases with an increased resolution over the colonization mechanism. The application of a biostimulator treatment on plants acted toward a reduction of root permissiveness for mycorrhizas. The phenomenon was noticeable through an increased colonization variability that overlapped with plant nutritional needs. The annual characteristic of the plant was highlighted by the simultaneous presence of arbuscules and vesicles, with a high share of arbuscules in the advanced phenophases. Colonized root parts presented numerous arbuscule-dominated areas in all phenophases, which indicated a continuous formation of these structures and an intense nutrient transfer between partners. Mycorrhizal maps showed the slowing effect of the biostimulators on colonization, with one phenophase delay in the case of biostimulated plants compared to the ones without biostimulators. The forecast models presented gradual colonization in plants without biostimulators, with the expansion of new hyphal networks. The use of biostimulators on plants exhibited a lower permissiveness for new colonization areas, and the mechanism relies on hyphae developed in the former phenophases.
农艺投入和技术，尤其是肥料，对丛枝菌根真菌与栽培植物之间共生关系的演变产生影响。使用MycoPatt方法评估玉米根中的菌根，可提取大量参数数据库，其对定殖机制的分辨率有所提高。对植物进行生物刺激剂处理会导致植物根系对菌根的允许性降低。通过与植物营养需求重叠的定殖变异性增加，这一现象很明显。植物的年度特征通过同时存在丛枝和泡囊得以突出，在后期物候阶段丛枝的比例很高。在所有物候阶段，被定殖的根部分都呈现出许多以丛枝为主的区域，这表明这些结构在持续形成，且共生伙伴之间存在强烈的养分转移。菌根图谱显示了生物刺激剂对定殖的减缓作用，与未使用生物刺激剂的植物相比，使用生物刺激剂的植物在物候阶段上延迟了一个阶段。预测模型显示，未使用生物刺激剂的植物定殖逐渐进行，新的菌丝网络不断扩展。在植物上使用生物刺激剂对新的定殖区域表现出较低的允许性，其机制依赖于在前一阶段形成的菌丝。
