Root-growth characteristics contributing to genotypic variation in nitrogen efficiency of oilseed rape

2012 ◽  
Vol 175 (3) ◽  
pp. 489-498 ◽  
Author(s):  
Abdullah Ulas ◽  
Gunda Schulte auf'm Erley ◽  
Mahmoud Kamh ◽  
Franz Wiesler ◽  
Walter J. Horst
Keyword(s):  
Root Growth ◽  
Oilseed Rape ◽  
Genotypic Variation ◽  
Growth Characteristics ◽  
Nitrogen Efficiency

scholarly journals Root-growth Characteristics Contributing to Genotypic Variation in Nitrogen Efficiency of Bottle Gourd and Rootstock Potential for Watermelon

Plants ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 77 ◽  
Author(s):  
Abdullah Ulas ◽  
Esat Doganci ◽  
Firdes Ulas ◽  
Halit Yetisir
Keyword(s):  
Root Growth ◽  
Root System ◽  
Genotypic Variation ◽  
Growth Characteristics ◽  
Bottle Gourd ◽  
Nitrogen Efficiency ◽  
N Efficiency ◽  
Growth System ◽  
Agricultural Faculty ◽  
Active Root

In this study, two hydroponic experiments were conducted in nutrient solution growth system. Experiments were conducted in growth chamber of Erciyes University, Agricultural Faculty in Kayseri, Turkey. In the first experiment, 10 local Turkish bottle gourd genotypes and two commercial watermelon cultivars were screened under 2 N doses (0.3 mM and 3.0 mM N) in RBD design with three replications for six weeks. In the second experiment, four genotypes (N-efficient: 70-07 and 07-45, N-inefficient: 35-10 and 45-07) were selected and used as rootstock for grafting with N-inefficient watermelon cultivar (Crimson Sweet) under 2 N doses. The grafted N-efficient gourd genotypes (07-45 and 70-07) significantly contributed to growth and biomass production of the N-inefficient watermelon plants as compared to non-grafted control plants and thus showed a higher rootstock potential for watermelon. The N-efficiency of some gourd genotypes was associated with vigor root growth and active root system particularly at low N conditions. These traits could be useful characters to select ‘N-efficient’ bottle gourd rootstocks for sustainable agriculture in the future.

Root growth and N-uptake activity of oilseed rape (Brassica napus L.) cultivars differing in nitrogen efficiency

2005 ◽  
Vol 168 (1) ◽  
pp. 130-137 ◽  
Author(s):  
Mahmoud Kamh ◽  
Franz Wiesler ◽  
Abdullah Ulas ◽  
Walter J. Horst
Keyword(s):  
Brassica Napus ◽  
Root Growth ◽  
Oilseed Rape ◽  
N Uptake ◽  
Nitrogen Efficiency ◽  
Brassica Napus L ◽  
Uptake Activity

The significance of litter loss and root growth on nitrogen efficiency in normal and semi-dwarf winter oilseed rape genotypes

2016 ◽  
Vol 186 ◽  
pp. 166-178 ◽  
Author(s):  
Dorte Bodin Dresbøll ◽  
Irene Skovby Rasmussen ◽  
Kristian Thorup-Kristensen
Keyword(s):  
Root Growth ◽  
Oilseed Rape ◽  
Nitrogen Efficiency ◽  
Winter Oilseed Rape

Does genotypic variation in nitrogen remobilisation efficiency contribute to nitrogen efficiency of winter oilseed-rape cultivars (Brassica napus L.)?

2013 ◽  
Vol 371 (1-2) ◽  
pp. 463-471 ◽  
Author(s):  
Abdullah Ulas ◽  
Torsten Behrens ◽  
Franz Wiesler ◽  
Walter J. Horst ◽  
Gunda Schulte auf’m Erley
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Genotypic Variation ◽  
Nitrogen Efficiency ◽  
Winter Oilseed Rape ◽  
Brassica Napus L ◽  
Nitrogen Remobilisation

scholarly journals In-Field Observation of Root Growth and Nitrogen Uptake Efficiency of Winter Oilseed Rape

Agronomy ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 105
Author(s):  
Julien Louvieaux ◽  
Antoine Leclercq ◽  
Loïc Haelterman ◽  
Christian Hermans
Keyword(s):  
Root Growth ◽  
Oilseed Rape ◽  
Root Development ◽  
Nitrogen Uptake ◽  
Root Morphology ◽  
Growth Stages ◽  
Winter Oilseed Rape ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
N Concentration

Field trials were conducted with two nitrogen applications (0 or 240 kg N ha−1) and three modern cultivars of winter oilseed rape (Brassica napus L.) previously selected from a root morphology screen at a young developmental stage. The purpose is to examine the relationship between root morphology and Nitrogen Uptake Efficiency (NUpE) and to test the predictiveness of some canopy optical indices for seed quality and yield. A tube-rhizotron system was used to incorporate below-ground root growth information. Practically, clear tubes of one meter in length were installed in soil at an angle of 45°. The root development was followed with a camera at key growth stages in autumn (leaf development) and spring (stem elongation and flowering). Autumn was a critical time window to observe the root development, and exploration in deeper horizons (36–48 cm) was faster without any fertilization treatment. Analysis of the rhizotron images was challenging and it was not possible to clearly discriminate between cultivars. Canopy reflectance and leaf optical indices were measured with proximal sensors. The Normalized Difference Vegetation Index (NDVI) was a positive indicator of biomass and seed yield while the Nitrogen Balance Index (NBI) was a positive indicator of above-ground biomass N concentration at flowering and seed N concentration at harvest.

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