Akademik Veri Yönetim Sistemi
FRESENIUS ENVIRONMENTAL BULLETIN, cilt.25, sa.11, ss.4944-4951, 2016 (SCI-Expanded)
Excessive B reduces germination, inhibiting the process of plant growth and changing the balance among ions of sunflower. The impacts of B on cultivars vary. In this study, we aimed at determining the responses of 4 sunflower cultivars (Sanbro, 64A14, 64A71 and Tunca) against B levels (0, 4, 8, 16, 32, 64 and 128 mg kg(-1)). The rate of net photosynthesis, transpiration, the height of plant, the leaf number of per plant, the fresh & dry weight, B, Na, K, Ca and P uptake were investigated. The consequences of the study revealed that the rate of net photosynthesis, the plant height, the shoot fresh and the dry weight dramatically decreased as the level of B increased. Cv. Sanbro had the minimum values for the number of leaves of per plant, the fresh and dry weight compared to other cultivars. The B uptake of inflorescence and shoots was enhanced by B. The Na uptake of cv. Sanbro, cv. 64A14 and cv. 64A71 increased while it decreased in the cv. Tunca. Ca, K and P uptake showed variations among cultivars. Germination was not observed at 128 mg kg(-1) B level in any of the cultivars. The most stabile phenotypic characters were observed in 64A71 compared to other cultivars. The increased B uptake, which is the indicator of being less tolerant to B toxicity, was more prominent in the cv. Sanbro and cv. 64A14. Among all cultivars, the cv. 64A71 appeared more tolerant under the excessive B.