Oilseed rape (Brassica napus L.) genotypic variation in response to boron deficiency
Abstract
Boron efficiency of 16 oilseed rape genotypes was tested using both hydroponic and pot-soil growing techniques. From the nutrient solution experiment (0.1 and 10 mu M B), 4 representative contrasting genotypes were selected based on relative root and shoot growth. These were then grown in pots with low-B soil (0.25 mg kg(-1)). From the nutrient solution experiment, 2 genotypes selected as B-inefficient did not show any growth disorders, and the concentration of B in the shoots was above critical. Furthermore, 4 contrasting genotypes were subjected to the stable B-11 isotope-enriched uptake solution for 6 h to verify possible low B-induced active uptake by roots and xylem loading of B. The concentration of B-11 in either root cell sap or xylem exudate was higher than in the external nutrient solution, which indicated the presence of low B-induced active uptake for all tested genotypes, and, to some extent, their efficiency with low B. In conclusion, a combination of different growing te...chniques under controlled environmental conditions together with different parameters including relative root and shoot weight, shoot B concentration, and B uptake provided reliable B efficiency results in oilseed rape genotypes.
Keywords:
Boron deficiency / boron uptake / genotypic differences / oilseed rape / screening methodsSource:
Turkish Journal of Agriculture and Forestry, 2012, 36, 4, 408-414Publisher:
- Tubitak Scientific & Technical Research Council Turkey, Ankara
Funding / projects:
- info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/173028/RS// (RS-173028)
- German Academic Exchange Service (DAAD fellowship)
DOI: 10.3906/tar-1109-43
ISSN: 1300-011X