کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2015141 1067523 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Over-expression of HAP3b enhances primary root elongation in Arabidopsis
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Over-expression of HAP3b enhances primary root elongation in Arabidopsis
چکیده انگلیسی

HAPs, similar to Heme Activator Proteins (HAP) or nuclear factor-Y (NF–Y) in yeast and animals, play versatile roles in plant growth, development, and responses to environmental cues. HAP3b in Arabidopsis is a member in the HAP3 gene family and is involved in regulating flowering time through the long-day photoperiod pathway (Cai et al., 2007, Plant Physiol 145: 98–105). In this study, we report that overexpression of HAP3b enhances primary root elongation. Detailed analysis showed that HAP3b-overexpression did not affect the length of the root elongation zone and the cell length profiles in the elongation zone. Kinematic analysis indicated that root cells in HAP3b-overexpressors elongate faster than the cells in wild-type roots. Using GUS as a reporter gene, we showed that HAP3b is specifically expressed in the tip region of the root, where cell division and elongation occur. Our results provide evidence to support a role of HAP3b in regulation of root growth.


► HAP3b is a putative transcription factor and was previously reported to have a role in regulating flowering time in Arabidopsis.
► Overexpression of HAP3b enhances primary root elongation in Arabidopsis.
► Overexpression of HAP3b did not alter the length of root elongation zone and the cell length profile. Thus, overexpression of HAP3b stimulates both cell division and elongation in the root.
► A role of HAP3b in controlling root elongation was supported by its tissue expression pattern. It is expressed in the root, specifically in the cell division and elongation region.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 49, Issue 6, June 2011, Pages 579–583
نویسندگان
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