کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4528418 | 1324306 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Root growth dynamics of Deyeuxia angustifolia seedlings in response to water level
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
A greenhouse experiment was performed to investigate root growth dynamics, plant growth, root porosity and root morphology of a marsh plant Deyeuxia angustifolia, one of the dominant species in the Sanjiang Plain, China. The aim of this study was to elucidate how this plant adjusts its root system to acclimate to different hydrological environments. Experimental treatments included three water depths: â5, 0 and 5Â cm (relative to the soil surface). Biomass accumulation was higher in the â5Â cm (0.90Â g per plant) and 0Â cm water-depth (1.18Â g per plant) than that in the 5Â cm water-depth treatments (0.66Â g per plant), indicating that plant growth was inhibited in the high water level. Root:shoot ratio (0.67 versus 0.42-0.43), the length (16Â cm versus 12-13Â cm) and diameter of adventitious roots (0.47Â mm versus 0.41Â mm), and root number (167 versus 81-119 number of roots per plant) were higher in the 0Â cm water-depth than those in the high and low water-depth treatments. Enhanced water level led to slightly increased porosity of main roots, but porosity was about 7% in all treatments. After 8 weeks, roots had been distributed into 14, 11 and 7Â cm soil depth in the 0, â5 and 5Â cm water-depth treatments, respectively, indicating that both high and low water levels led to shallow root systems. Our data suggest that D. angustifolia can adjust root morphology and root growth pattern according to water level, and that this plant has limited oxygen diffusion potential to the roots due to the reduced biomass in the high water level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquatic Botany - Volume 89, Issue 3, October 2008, Pages 292-296
Journal: Aquatic Botany - Volume 89, Issue 3, October 2008, Pages 292-296
نویسندگان
Yonghong Xie, Wenbo Luo, Kelin Wang, Bo Ren,