Details

Autor(en) / Beteiligte

• Wei, Mi-Yin
• Chao, Yung-Yang
• Kao, Ching Huei

Titel

NaCl-induced heme oxygenase in roots of rice seedlings is mediated through hydrogen peroxide

Ist Teil von

• Plant growth regulation, 2013-04, Vol.69 (3), p.209-214

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Recent findings have suggested that H 2 O 2 is an important signaling molecule for regulating plant responses to abiotic stress. H 2 O 2 plays a critical role in NaCl stress. Heme oxygenase (HO) is known to play a protective role against oxidative stress. In this study, we examined the possible involvement of H 2 O 2 in regulating NaCl-promoted HO activity in rice roots. Treatment with NaCl increased HO activity and H 2 O 2 content in rice roots. As well, NaCl could induce OsHO1 mRNA expression. NaCl (150 mM) and NaNO 3 (150 mM) were equally effective in inducing HO activity. However, mannitol at the concentration (276 mM) iso-osmotic with 150 mM NaCl had no effect on HO activity. NaCl-promoted HO activity and OsHO1 expression in rice roots was reduced by NADPH oxidase inhibitors i.e. dipehnyleneiodonium and imidazole. Moreover, exogenous application of H 2 O 2 enhanced the activity of HO and the mRNA level of OsHO1. Our data suggest that H 2 O 2 production plays a positive role in NaCl- induced HO activity by enhancing its mRNA level in rice roots.