Zinc and selenium as modulating factors of the anatomy and physiologyof Billbergia zebrina (Bromeliaceae) during in vitro culture

Photosynthetica

卷:58

A.B.P.L.GONTIJO¹  J.P.R.MARTINS¹  A.R.FALQUETO¹  A.F.C.SOUZA¹  P.C.S.BRAGA¹  L.C.A.RODRIGUES² 

[1] Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, Litorâneo - 29932-540São Mateus, ES, Brazil;

[2] Faculty of Dentistry, Federal University of Alfenas, Centro - 37130-001 Alfenas, MG, Brazil;

关键词: biomonitors;    bromeliad;    jip test;    plant anatomy;   

DOI  :  10.32615/ps.2020.058

来源: DOAJ

【 摘 要 】

Deleterious effects induced by high zinc (Zn) concentrations can be alleviated with selenium (Se) co-exposure. Therefore, we analyzed the morphophysiological changes of Billbergia zebrina in response to Zn and Se co-exposure. Plants were cultured in media containing three Zn concentrations (0, 30, and 300 μM) combined with two Se concentrations (0 and4 μM), for a total of six treatments. At 75 d of culture, the leaf anatomy, chlorophyll (Chl) a fluorescence, and contents of photosynthetic pigments (Chl) and nutrients were analyzed. The total Chl content declined with rising Zn concentrations. Plants cultured with Se presented a decrease in the Chl a/b ratio and greater total Chl content. Positive L- and K-bands were verified under Se absence and with 30 and 300 μM Zn. Plants showed bioaccumulation capacity and tolerance to excess Zn. Se acted as a modulator to alleviate the Zn stress.

【 授权许可】

Unknown