Chlorella triggers stomatal closure mediated by NADPH oxidase and improves instantaneous water use efficiency in Vicia faba.
Plant Signal Behav
; 92014 May 06.
Article
en En
| MEDLINE
| ID: mdl-24801212
ABSTRACT
Stomatal closure induced by live microbes and microbe-associated molecular patterns (MAMPs) has been associated with early defense responses of plants. Chlorella is a unicellular autotrophic microorganism that can synthesize many bioactive substances with positive effects on humans, animals and plants. However, its effects on stomatal movement and instantaneous intrinsic water use efficiency (WUEi) in plants have been not explored yet. Our present work showed that application of Chlorella to isolated epidermal peels of Vicia faba induced stomatal closure in a dose-and time-dependent manner. Pharmacological study revealed that the Chlorella-triggered stomatal closure was mainly mediated by reactive oxygen species (ROS) production via NADPH oxidase. Additionally, exogenous application of optimal concentrations of Chlorella suspension caused an obvious reduction in leaf transpiration rate (E) without a parallel reduction in net photosynthetic rate (Pn), favoring the improvement of WUEi in Vicia faba. The chlorophyll fluorescence and content analysis further indicated that Chlorella had no effects on plant photosynthetic reactions center after short-term foliar application.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Plant Signal Behav
Asunto de la revista:
BOTANICA
/
FISIOLOGIA
Año:
2014
Tipo del documento:
Article