NDLI: Effects of arsenate on tobacco hairy root and seedling growth, and its removal

Content Provider	Springer Nature Link
Author	Tala, Melina A. Oller, Ana L. Wevar González, Patricia González, Soledad Oliva Agostini, Elizabeth
Copyright Year	2013
Abstract	Arsenic (As) is a highly toxic environmental contaminant to which most living organisms are exposed. Plants have evolved several mechanisms to cope with this toxic metalloid; however, these mechanisms are only partially understood. The response of plants to As phytotoxicity is highly complex, with considerable variation among species. In this study, arsenate (As$^{+5}$) effects on germination and early root development of tobacco (Nicotiana tabacum) seedlings were investigated. Also, As$^{+5}$ tolerance and removal efficiency of tobacco hairy roots (HRs) and seedlings were assessed and compared. Total seed germination capacity was not affected by 10 to 200 μM As$^{+5}$, while primary root length and root branching were reduced by As$^{+5}$ concentrations that were at or above 100 μM. Both systems were able to tolerate As$^{+5}$ concentrations of 10 μM since no growth inhibition was detected. For higher As$^{+5}$ concentrations, phytotoxicity increased, but it was mitigated by higher phosphate (Pi) availability. Under the studied conditions, As$^{+5}$ removal efficiency of HRs greatly exceeded that of seedlings. Further, tobacco HRs were able to accumulate As in their tissues. These results justify further investigations on As tolerance and detoxification mechanisms in tobacco, an easy-to-transform crop species with high biomass, which could allow evaluation of the possible application of wild type or alternatively transgenic tobacco plants for As phytoextraction.
Starting Page	217
Ending Page	225
Page Count	9
File Format	PDF
ISSN	10545476
Journal	In Vitro Cellular & Developmental Biology - Plant
Volume Number	50
Issue Number	2
e-ISSN	14752689
Language	English
Publisher	Springer US
Publisher Date	2013-09-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Arsenic Removal efficiency Tobacco hairy roots Tobacco seedlings Tolerance Plant Sciences Cell Biology Developmental Biology Plant Breeding/Biotechnology Plant Genetics & Genomics
Content Type	Text
Resource Type	Article
Subject	Cell Biology Developmental Biology Plant Science Biotechnology

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