NDLI: Nitric oxide signaling is involved in arsenic-induced guard cell death in Vicia faba L. (Fabaceae)

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Brazilian Journal of Botany : Volume 40, Issue 2, June 2017

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Nitric oxide signaling is involved in arsenic-induced guard cell death in Vicia faba L. (Fabaceae)

Content Provider	Springer Nature Link
Author	Xue, Meizhao Yi, Huilan
Copyright Year	2017
Abstract	Nitric oxide (NO) is a key endogenous signaling molecule in the plant response to environmental stresses. Here, we show that NO is involved in arsenic (As) cytotoxicity in Vicia faba L. guard cells. The results showed that NaAsO$_{2}$ (0.1–10 mg L$^{−1}$) decreased cell viability and caused cell death in a concentration-dependent manner, accompanied by significant increases in intracellular NO, reactive oxygen species (ROS), and Ca$^{2+}$ levels as well as nitrate reductase (NR) activity. Arsenic-induced cell death was blocked by NO antagonists (NO scavenger c-PTIO; nitrate reductase inhibitor NaN$_{3}$), ROS scavengers (AsA or CAT), and Ca$^{2+}$ antagonists (Ca$^{2+}$ chelator EGTA; Ca$^{2+}$ channel blocker LaCl$_{3}$). In addition, NaN$_{3}$ and CAT led to a significant decrease in the intracellular Ca$^{2+}$ level, whereas LaCl$_{3}$ and EGTA barely affected the intracellular NO and ROS levels. Our results demonstrated that increased levels of NO and ROS activate Ca$^{2+}$ signaling to control responses to As cytotoxicity and that NR-dependent NO generation contributes to As toxicity in V. faba guard cells.
Starting Page	635
Ending Page	642
Page Count	8
File Format	PDF
ISSN	01008404
Journal	Brazilian Journal of Botany
Volume Number	40
Issue Number	3
e-ISSN	18069959
Language	English
Publisher	Springer International Publishing
Publisher Date	2017-03-22
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	NO Plant Systematics/Taxonomy/Biogeography NaAsO$_{2}$ ROS Cytotoxicity Ca$^{2+}$ Guard cell
Content Type	Text
Resource Type	Article
Subject	Plant Science

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