Ectomycorrhizas in Lycopodiopsida: their first registry and arbuscular mycorrhiza in Phlegmariurus saururus (Huperziaceae).

IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES
Anais da Academia Brasileira de Ciencias Pub Date : 2025-05-12 eCollection Date: 2025-01-01 DOI:10.1590/0001-3765202520241248
María Gabriela Romagnoli, Myriam Del Valle Catania, Marcelo Daniel Arana, Patricia Liliana Albornoz
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引用次数: 0

Abstract

Lycophytes show no instances of ectomycorrhizas. Phlegmariurus saururus is the only Huperziaceae that grows in Comechingones biogeographic province, in sunny, exposed surficial rock crevices with poor soil development and very scarce water. As mycorrhizas improve plant fitness in natural ecosystems, it was hypothesized that P. saururus can develop multiple types of fungal symbiosis, including ectomycorrhizas. For detecting, identification and description of mycorrhizas, conventional techniques were employed, and samples of roots were cut with an ultra-microtome to obtain thin (3 µm) and ultrathin (0.1 µm) sections. Phlegmariurus saururus is the first species of Lycopodiopsida where the ectomycorrhizas are evidenced. Arbuscular mycorrhizas and septate endophytes were also found. Ectomycorrhizas can alter the anatomy and hydrophilic properties of roots, improving the adaptation of the plant hosts to habitats with a marked period of drought, as the novel Andean Comechingones habitats. The ectomycorrhizas detected in P. saururus could be considered as an adaptive mechanism related to the successful colonisation of this habitat and can undergo a significant transformation in the lifestyle of fungal symbiosis of lycophytes, which could provide important insights into this morphological and functional evolution.

石松属植物外生菌根的首次登记和石杉科植物黏痰菌根的丛枝菌根。
石松植物没有外生菌根的实例。痰尿龙是唯一生长在Comechingones生物地理省的石杉科植物,生长在阳光充足,土壤发育不良,水非常稀缺的地表岩石裂缝中。由于菌根可以提高自然生态系统中植物的适应性,因此我们假设P. saururus可以发展多种类型的真菌共生,包括外生菌根。为了检测、鉴定和描述菌根,采用常规技术,并使用超显微切片机切割根样品,获得薄(3µm)和超薄(0.1µm)切片。痰菌是最早发现外生菌根的石松科植物。还发现了丛枝菌根和隔生内生菌。外生菌根可以改变根系的解剖结构和亲水特性,提高植物宿主对具有显著干旱时期的栖息地的适应能力,如新的安第斯山脉Comechingones栖息地。在P. saururus中检测到的外生菌根可以被认为是一种与该栖息地成功定殖有关的适应机制,并且可以在石松真菌共生的生活方式中发生重大转变,这可以为这种形态和功能进化提供重要的见解。
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来源期刊
Anais da Academia Brasileira de Ciencias
Anais da Academia Brasileira de Ciencias 综合性期刊-综合性期刊
CiteScore
2.20
自引率
0.00%
发文量
347
审稿时长
1 months
期刊介绍: The Brazilian Academy of Sciences (BAS) publishes its journal, Annals of the Brazilian Academy of Sciences (AABC, in its Brazilianportuguese acronym ), every 3 months, being the oldest journal in Brazil with conkinuous distribukion, daking back to 1929. This scienkihic journal aims to publish the advances in scienkihic research from both Brazilian and foreigner scienkists, who work in the main research centers in the whole world, always looking for excellence. Essenkially a mulkidisciplinary journal, the AABC cover, with both reviews and original researches, the diverse areas represented in the Academy, such as Biology, Physics, Biomedical Sciences, Chemistry, Agrarian Sciences, Engineering, Mathemakics, Social, Health and Earth Sciences.
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