کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4511589 1321921 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Histological development of the sunflower fruit pericarp as affected by pre- and early post-anthesis canopy shading
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Histological development of the sunflower fruit pericarp as affected by pre- and early post-anthesis canopy shading
چکیده انگلیسی
The dynamics of pericarp development compared to that of the embryo, as well as the effect of pre-anthesis and post-anthesis shading on pericarp histogenesis and dry weight dynamics of fruits from two sunflower (Helianthus annuus L.) hybrid cultivars along three capitulum positions, peripheral, mid and central were studied. During fruit formation, the cell division phase of the carpel takes place before anthesis. Eight days after anthesis the pericarp reached its final size, while its cell wall's sclerification was almost complete 13 days after anthesis. Pre-anthesis shading affected the carpel cell division period reducing (17-33%) the number of pericarp middle layer strata and increased the thickenings of the cell wall of the mid (19%) and central (33-63%) fruits. In central fruits, the dry weight accumulation period was reduced. In contrast, post-anthesis shading reduced both the cell wall thickness (16-64%) and the number (38-58%) of pericarp middle layer sclerified strata of fruits in the three positions of the capitulum. In the mid and central fruits, the dry weight accumulation period extended 11-16 and 3-4 days, respectively, over those of the control. Both shading treatments produced thinner and lighter pericarps, but with different anatomical features that were associated with differences in the efficiency of use of the fruit for industrial oil extraction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 103, Issue 3, 13 September 2007, Pages 229-238
نویسندگان
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