Functional analysis of glycin rich- RNA binding protein, a suppressor of trehalose-6-phosphate mediating growth arrest in Arabidopsis thaliana
نویسندگان: ثبت نشده
چکیده مقاله:
Metabolism of the alpha-1,1 glucose disaccharide, trehalose, is indispensable in plants. In the Murashigeand Skoog (MS) medium, trehalose inhibits plant growth and allocation of carbon to roots. A suppressorof trehalose-6-phosphate (T6P) mediated growth arrest, GR-RBP2, is characterized in more detail.Phylogenetic analysis revealed that GR-RBP2 is a protein of likely prokaryotic origin. A knockout mutantof GR-RBP2 was identified in the T-DNA insertion line SALK-059714, yet plants of this line were not alteredwith regard to growth on different carbon sources and on trehalose compared to WT. GUS expression analysisshowed that GR-RBP2 was detected in adult leaves, flowers and siliques. Expression was particularlyhigh in root tips. GR-RBP2 expression also is insensitive to 100 mM trehalose. TAP-tagged versionsof this protein showed that GR-RBP2 is part of a protein complex in planta.
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Trehalose mediated growth inhibition of Arabidopsis seedlings is due to trehalose-6-phosphate accumulation.
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عنوان ژورنال
دوره 10 شماره 1
صفحات 22- 31
تاریخ انتشار 2012-01-01
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