Role of nitric oxide dependence on nitric oxide synthase-like activity in the water stress signaling of maize seedling

Journal of Integrative Plant Biology
Gang-Ping HaoJian-Hua Zhang

Abstract

Nitric oxide (NO) has been known as an important signal in plant antioxidative defense but its production and roles in water stress are less known. The present study investigated whether NO dependence on a NO synthase-like (NOS) activity is involved in the signaling of drought-induced protective responses in maize seedlings.NOS activity, rate of NO release and drought responses were analyzed when NO donor sodium nitroprusside (SNP), NO scavenger c-PTIO (2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) and NOS inhibitor L-NAME (NG-nitro-L-arginine methyl ester) were applied to both detached maize leaves and whole plants. Both NOS activity and the rate of NO release increased substantially under dehydration stress. The high NOS activity induced by c-PTIO as NO scavenger and NO accumulation inhibited by NOS inhibitor L-NAME in dehydration-treated maize seedlings indicated that most NO production under water deficit stress may be generated from NOS-like activity. After dehydration stress for 3 h, detached maize leaves pretreated with NO donor SNP maintained more water content than that of control leaves pretreated with water. This result was consistent with the decrease in the transpiration rate of SNP-treated lea...Continue Reading

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Citations

Sep 10, 2010·Protoplasma·Manzer H SiddiquiMohammed O Basalah
Jan 29, 2013·Plant Science : an International Journal of Experimental Plant Biology·Santiago SignorelliJorge Monza
Sep 7, 2011·Plant Science : an International Journal of Experimental Plant Biology·Francisco J CorpasJuan B Barroso
Aug 8, 2009·The New Phytologist·Francisco J CorpasJuan B Barroso
Sep 24, 2015·Plant Science : an International Journal of Experimental Plant Biology·Parankusam SantisreeKiran K Sharma
Apr 29, 2021·Plant Cell Reports·Noushina IqbalFrancisco J Corpas
May 23, 2021·Journal of Photochemistry and Photobiology. B, Biology·Ritesh Kumar RaipuriaMeeta Jain

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