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Fungal symbionts of endangered Crocanthemum canadense (Cistaceae) in Nova Scotia
Botany ( IF 1.0 ) Pub Date : 2021-03-09 , DOI: 10.1139/cjb-2020-0187
Philicity R.M. Byers 1 , Rodger C. Evans 2 , Zoë Migicovsky 3 , Allison K. Walker 2
Affiliation  

Botany, Ahead of Print.
Crocanthemum canadense (L.) Britton (Cistaceae) is critically imperiled in Nova Scotia. The decline of Nova Scotian Crocanthemum canadense is largely due to the loss of the Annapolis Valley sand barrens habitat. Fungal symbionts may aid in nutrient and water acquisition as well as plant defenses. The role of fungal associations with Crocanthemum canadense is unknown; our goal was to identify fungal symbionts to inform ongoing conservation research. We isolated fungi from eighteen Crocanthemum canadense plants collected from Greenwood, Nova Scotia. Using internal transcribed spacer (ITS) rDNA barcoding of fungal cultures, we identified 58 fungal taxa. ITS2 meta-amplicon barcoding of roots and rhizosphere soil revealed 241 fungi with basidiomycetes accounting for 53.8% of reads. Chaetothyriales sp., Mycetinis scorodonius, Acidomelania panicicola, and Scleroderma citrinum were the most abundant root associates based on meta-amplicon data. We quantified percent root colonization of arbuscular mycorrhizal fungi (AMF) using root staining and microscopy. The average AMF colonization rate of the roots was 29.6% (n = 18). Our research provides a foundation for understanding the fungal community in this declining habitat and the first account of fungal symbionts in the above- and below-ground tissues and rhizosphere of Crocanthemum canadense. Identifying fungi influencing endangered Nova Scotian Crocanthemum canadense is valuable for developing conservation strategies.


中文翻译:

新斯科舍省濒临灭绝的 Crocanthemum canadense (Cistaceae) 的真菌共生体

植物学,超前印刷。
Crocanthemum canadense (L.) Britton (Cistaceae) 在新斯科舍省受到严重威胁。Nova Scotian Crocanthemum canadense 的衰落主要是由于安纳波利斯谷沙地贫瘠栖息地的丧失。真菌共生体可能有助于营养和水分的获取以及植物防御。真菌与加拿大 Crocanthemum 的关联作用未知;我们的目标是确定真菌共生体,为正在进行的保护研究提供信息。我们从从新斯科舍省格林伍德收集的 18 株 Crocanthemum canadense 植物中分离出真菌。使用真菌培养物的内部转录间隔 (ITS) rDNA 条形码,我们确定了 58 个真菌类群。根和根际土壤的 ITS2 宏扩增子条形码显示 241 种真菌,担子菌占读数的 53.8%。Chaetothyriales sp., Mycetinis scorodonius, Acidomelania panicicola, 和 Scleroderma citrinum 是基于宏扩增数据的最丰富的根关联物。我们使用根染色和显微镜量化了丛枝菌根真菌 (AMF) 的根定植百分比。根的平均 AMF 定植率为 29.6% (n = 18)。我们的研究为了解这个不断下降的栖息地中的真菌群落提供了基础,并首次说明了 Crocanthemum canadense 的地上和地下组织和根际中的真菌共生体。识别影响濒危的新斯科舍省 Crocanthemum canadense 的真菌对于制定保护策略很有价值。根的平均 AMF 定植率为 29.6% (n = 18)。我们的研究为了解这个不断下降的栖息地中的真菌群落提供了基础,并首次说明了 Crocanthemum canadense 的地上和地下组织和根际中的真菌共生体。识别影响濒危的新斯科舍省 Crocanthemum canadense 的真菌对于制定保护策略很有价值。根的平均 AMF 定植率为 29.6% (n = 18)。我们的研究为了解这个不断下降的栖息地中的真菌群落提供了基础,并首次说明了 Crocanthemum canadense 的地上和地下组织和根际中的真菌共生体。识别影响濒危的新斯科舍省 Crocanthemum canadense 的真菌对于制定保护策略很有价值。
更新日期:2021-03-09
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