کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4527520 1625806 2017 9 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Leaf ontogeny and meristem activity of Typha domingensis Pers. (Typhaceae) under different phosphate concentrations
ترجمه فارسی عنوان
رشدشناسی برگ و فعالیت مریستم Typha domingensis PERS. (لوئیان) تحت غلظت های مختلف فسفات
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کلمات کلیدی
لوئی؛ توسعه برگ؛ تمایز بافت؛ Aerenchyma؛ مریستم زمین
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
چکیده انگلیسی


• Typha domingensis leaf meristems increase cell production by phosphorus influence.
• Phosphorus eutrophication promotes palisade parenchyma and aerenchyma development.
• Phosphorus effects start in leaf meristems of Typha domingensis.

Phosphorus eutrophication may promote increased growth, photosynthesis, and shoot investment in cattail (Typha domingensis). However, its influence in early leaf development and meristem traits remains unclear. Therefore, this work aimed to evaluate the effects of phosphate levels on meristem structure and activity as well as tissue differentiation during the leaf development of T. domingensis. Plants were subjected to modified nutrient solutions containing three phosphate concentrations. The leaves were collected daily for 7 days, and were used to evaluate growth, meristem characteristics and tissue differentiation. In addition, phosphorus content was measured in roots and rhizomes exposed to phosphate treatments. The leaf primordia cultured in 0.4 and 0.8 mM phosphate levels showed a larger proportion of ground meristem than those grown in 0.1 mM. The procambium proportion was higher under 0.8 mM phosphate when compared to other concentrations. However, the proportion of protodermis was greater in 0.1 mM phosphate when compared to 0.4 and 0.8 mM. In addition, leaf primordia submitted to 0.4 and 0.8 mM phosphate increased meristem cell production. These primordia also showed fewer dividing cells and shorter cell cycle as compared to 0.1 mM phosphate. The development of aerenchyma and palisade parenchyma was promoted by greater phosphate concentrations. Higher aerenchyma proportion was found in plants from 0.8 mM phosphate treatment. Phosphorus content was higher in root than rhizomes for plants grown at 0.4 and 0.8 mM of phosphate. Likewise, the higher phosphate concentrations increased P levels in both roots and rhizomes. Therefore, optimal phosphorus levels promote the development of leaves with a higher photosynthetic potential, which may contribute to the uncontrolled growth of cattail under phosphorus eutrophication.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquatic Botany - Volume 136, January 2017, Pages 43–51
نویسندگان
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