The mitogen-activated protein kinase kinase 9 (MKK9) modulates nitrogen acquisition and anthocyanin accumulation under nitrogen-limiting condition in Arabidopsis.
Biochem Biophys Res Commun
; 487(3): 539-544, 2017 06 03.
Article
en En
| MEDLINE
| ID: mdl-28435067
ABSTRACT
Nitrogen (N) plays important roles as both a macronutrient and signal in plant growth and development. However, our understanding of N signaling and/or response mechanisms in plants is still limited. Here, we show that the mitogen-activated protein kinase kinase 9 (MKK9) is involved in plant N responses in Arabidopsis by regulating production of anthocyanins and the ability of N acquisition under low N conditions. Transgenic plants that express a constitutively active version of MKK9 (MKK9DD) showed decreased accumulation of anthocynanins and reduced expression of key anthocyanin biosynthetic genes under low N condition compared to the plants expressing the inactive form of MKK9 (MKK9KR). The decreased anthocyanin accumulation could be due to the increased N level in the MKK9DD plants as these plants were shown to accumulate more N and have higher expression of N acquisition-related genes under low N condition as compared with the MKK9KR plants. Taken together, our results suggest that MKK9 plays a role in plant adaptation to low N stress by modulating both anthocyanin accumulation and N status.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Arabidopsis
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Quinasas de Proteína Quinasa Activadas por Mitógenos
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Proteínas de Arabidopsis
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Antocianinas
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Nitrógeno
Idioma:
En
Revista:
Biochem Biophys Res Commun
Año:
2017
Tipo del documento:
Article
Pais de publicación:
EEUU
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ESTADOS UNIDOS
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ESTADOS UNIDOS DA AMERICA
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EUA
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UNITED STATES
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UNITED STATES OF AMERICA
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US
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USA