NDLI: Distribution of elements on tobacco trichomes and leaves under cadmium and sodium stresses

Content Provider	Springer Nature Link
Author	Choi, Yong Eui Harada, Emiko Kim, Gwang Hoon Yoon, Eui Soo Sano, Hiroshi
Copyright Year	2004
Abstract	When tobacco (Nicotiana tabacum) plants are exposed to toxic level of cadmium (0.2 mM Cd), their trichomes actively excrete crystals (Choi et al., 2001). In this study, we investigated the distribution of Cd and NaCI on trichomes and leaf surfaces. Energy dispersive x-ray (EDX) analysis revealed that, under toxic Cd stress, crystals exudated from the trichomes contained high amounts of Ca, Mg, and Cd, as well as low levels of P, S, and Mn. Electron spectroscopic imaging (ESI) from trichomes and attached crystals showed that these crystals emitted denser radiation energy for Ca and Cd than did the head cells of the trichomes. However, no Cd was detected on the trichome surface itself or within the leaf epidermis. In contrast, treatment with salt (NaCI) did not stimulate crystal formation; instead, it induced the abnormal expansion of trichome cells. Although Na was not accumulated within the crystals, a considerable amount of both Na and CI was sequestered within the stalk cells of the long trichomes. Therefore, we believe that tobacco trichomes play an important role in Cd crystal exudation through crystallization, but that, under NaCI stress, the long trichomes sequester those elements within their stalks.
Starting Page	75
Ending Page	82
Page Count	8
File Format	PDF
ISSN	12269239
Journal	Journal of Plant Biology
Volume Number	47
Issue Number	2
e-ISSN	18670725
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	crystal heavy metal salt trichome Plant Sciences Plant Breeding/Biotechnology Plant Genetics & Genomics Plant Systematics/Taxonomy/Biogeography Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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