کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2048902 1074106 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Norspermine substitutes for thermospermine in the control of stem elongation in Arabidopsis thaliana
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Norspermine substitutes for thermospermine in the control of stem elongation in Arabidopsis thaliana
چکیده انگلیسی

Thermospermine is a structural isomer of spermine and is required for stem elongation in Arabidopsis thaliana. We noted the C3C3 arrangement of carbon chains in thermospermine (C3C3C4), which is not present in spermine (C3C4C3), and examined if it is functionally replaced with norspermine (C3C3C3) or not. Exogenous application of norspermine to acl5, a mutant defective in the synthesis of thermospermine, partially suppressed its dwarf phenotype, and down-regulated the level of the acl5 transcript which is much higher than that of the ACL5 transcript in the wild type. Furthermore, in the Zinnia culture, differentiation of mesophyll cells into tracheary elements was blocked by thermospermine and norspermine but not by spermine. Our results indicate that norspermine can functionally substitute for thermospermine.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: FEBS Letters - Volume 584, Issue 14, 16 July 2010, Pages 3042–3046
نویسندگان
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