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Oilseed rape genotypes response to boron toxicity

By Savić Jasna, Marjanović-Jeromela Ana, Glamočlija Đorđe and Prodanović Slaven

Abstract

Response of 16 oilseed rape genotypes to B (boron) toxicity was analyzed by comparing the results of two experiments conducted in a glasshouse. In Experiment 1 plants were grown in standard nutrient solutions with 10 µMB (control) and 1000 µM B. Relative root and shoot growth varied from 20-120% and 31-117%, respectively. Variation in B concentration in shoots was also wide (206.5-441.7 µg B g-1 DW) as well as total B uptake by plant (62.3-281.2 µg B g1). Four selected genotypes were grown in Experiment 2 in pots filled with high B soil (8 kg ha-1 B; B8). Shoot growth was not affected by B8 treatment, while root and shoot B concentration was significantly increased compared to control. Genotypes Panther and Pronto which performed low relative root and shoot growth and high B accumulation in plants in Experiment 1, had good growth in B8 treatment. In Experiment 2 genotype NS-L-7 had significantly lower B concentration in shots under treatment B8, but also very high B accumulation in Experiment 1. In addition, cluster analyses classified genotypes in three groups according to traits contrasting in their significance for analyzing response to B toxicity. The first group included four varieties based on their shared characteristics that have small value for the relative growth of roots and shoots and large values of B concentration in shoot. In the second largest group were connected ten genotypes that are heterogeneous in traits and do not stand out on any characteristic. Genotypes NS-L-7 and Navajo were separated in the third group because they had big relative growth of root and shoot, but also a high concentration of B in the shoot, and high total B uptake. Results showed that none of tested genotypes could not be recommended for breeding process to tolerance for B toxicity. [Projekat Ministarstva nauke Republike Srbije, br. OI 173028

Topics: B toxicity, oilseed rape, B concentration, nutrient solution, cluster analyses, Genetics, QH426-470, Biology (General), QH301-705.5, Science, Q, DOAJ:Genetics, DOAJ:Biology, DOAJ:Biology and Life Sciences
Publisher: Serbian Genetics Society
Year: 2013
DOI identifier: 10.2298/GENSR1302565S
OAI identifier: oai:doaj.org/article:3846a8c87bc444a492be835b1f476a61
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