Anatomy and Histochemistry of the Roots and Shoots in the Aquatic Selenium Hyperaccumulator Cardamine hupingshanensis (Brassicaceae)
| Autor: | Xiang Jiqian, Ming Jiajia, Yin Hongqing, Zhu Yunfen, Li Yajie, Long Lan, Ye Ziyun, Wang Haiying, Wang Xiaoe, Zhang Fan, Yang Yongkang, Yang Chaodong |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Open Life Sciences, Vol 14, Iss 1, Pp 318-326 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2391-5412 32663145 |
| DOI: | 10.1515/biol-2019-0035 |
| Popis: | The perennial selenium (Se) hyperaccumulator Cardamine hupingshanensis (Brassicaceae) thrives in aquatic and subaquatic Se-rich environments along the Wuling Mountains, China. Using bright-field and epifluorescence microscopy, the present study determined the anatomical structures and histochemical features that allow this species to survive in Se-rich aquatic environments. The roots of C. hupingshanensis have an endodermis with Casparian walls, suberin lamellae, and lignified secondary cell walls; the cortex and hypodermal walls have phi (Φ) thickenings; and the mature taproots have a secondary structure with a periderm. The stems possess a lignified sclerenchymal ring and an endodermis, and the pith and cortex walls have polysaccharide-rich collenchyma. Air spaces are present in the intercellular spaces and aerenchyma in the cortex and pith of the roots and shoots. The dense fine roots with lignified Φ thickenings and polysaccharide-rich collenchyma in the shoots may allow C. hupingshanensis to hyperaccumulate Se. Overall, our study elucidated the anatomical features that permit C. hupingshanensis to thrive in Se-rich aquatic environments. |
| Databáze: | Directory of Open Access Journals |
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