Nuclei of Taxus baccata : Flavanols Linked to Chromatin Remodeling Factors
المؤلفون المشاركون
Dithmar, Heike
Polster, Jürgen
Feucht, Walter
المصدر
العدد
المجلد 2009، العدد 2009 (31 ديسمبر/كانون الأول 2009)، ص ص. 1-9، 9ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2009-11-30
دولة النشر
مصر
عدد الصفحات
9
التخصصات الرئيسية
الملخص EN
Microscopic studies of young needles and shoot tips from Taxus baccata showed that flavanols are localized in the nuclei.
This observation is based on the histochemical staining of flavanols with the DMACA reagent.
The colour that is obtained with this reagent varies from pale to deep blue, depending on the amount of flavanols.
This study is focused on nondifferentiated cell lineages and on differentiating cells.
The key point to note is that all nuclei of a cell lineage showed a uniform DMACA staining pattern based on the amount and structural appearence of nuclear flavanols.
This points to transcriptional and epigenetic programming.
However, comparing various cell lineages from different shoot tips and needles revealed a lineage-specific expression of nuclear flavanols.
This result implied that both positional and developmental signals from neighbouring cells were involved in the nuclear flavanol binding of lineages.
The cells of a developmentally advanced lineage loose their intimate contact and, then, they separate from each other to undergo an autonomous, individual sequence of differentiation.
This in turn was accompanied by differences in the nuclear flavanol patterns of the single cells.
Investigating different mitotic stages revealed a wide spectrum in flavanol staining intensities of the chromosomes.
These observations should be linked to UV-VIS spectroscopical kinetic results indicating that nuclear flavanols bound to histones are involved in epigenetically regulated modification of chromatin.
The kinetic studies show that catechin is relatively rapidly degraded by oxygen in the presence of Mg2+-ions.
However, this degradation reaction is strongly inhibited when histone proteins were added.
This behaviour is a clear indication that coregulatory interactions exist between catechin and histones.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Feucht, Walter& Dithmar, Heike& Polster, Jürgen. 2009. Nuclei of Taxus baccata : Flavanols Linked to Chromatin Remodeling Factors. Journal of Botany،Vol. 2009, no. 2009, pp.1-9.
https://search.emarefa.net/detail/BIM-502658
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Feucht, Walter…[et al.]. Nuclei of Taxus baccata : Flavanols Linked to Chromatin Remodeling Factors. Journal of Botany No. 2009 (2009), pp.1-9.
https://search.emarefa.net/detail/BIM-502658
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Feucht, Walter& Dithmar, Heike& Polster, Jürgen. Nuclei of Taxus baccata : Flavanols Linked to Chromatin Remodeling Factors. Journal of Botany. 2009. Vol. 2009, no. 2009, pp.1-9.
https://search.emarefa.net/detail/BIM-502658
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-502658
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر