کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2018095 1067834 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The bent peduncle phenomenon in roses is a developmental process involving auxin
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
The bent peduncle phenomenon in roses is a developmental process involving auxin
چکیده انگلیسی

In roses, bending of the peduncle during flower development – “bent peduncle phenomenon” (BPP) – results in the production of a series of developmental aberrancies. Detailed characterization of BPP revealed that the typical bending is intrinsically related to developmental features, i.e., the presence of an enlarged sepal appearing as a phylloid structure, floral organ conversions, fasciation of the stem and the higher incidence of BPP in axillary stems developing from BPP stems than from normal stems. The sclerenchymal tissue of BPP stems exhibited larger cells and thinner cell walls than those of normal stems, which may facilitate the bending process. BPP-like bending could be induced by external auxin application and inhibited by auxin transport inhibitors. Thus, in BPP auxin appears to be involved in differential growth, thereby inducing bending. However, there were no differences in endogenous IAA content between the upper and lower sides of bent peduncles, indicating that the asymmetric IAA distribution may be transient. This study strongly suggests that BPP is a developmental process, occurring during the meristematic stage of flower formation, possibly involving auxin distribution, which affects stem bending and fasciation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 176, Issue 6, June 2009, Pages 736–743
نویسندگان
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