Journal
PLOS ONE
Volume 8, Issue 9, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0073380
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Funding
- National Basic Research Program of China [2010CB126100]
- National Natural Science Foundation of China [30901854, 81273487]
- Fundamental Research Funds for the Central Universities [KYZ201107]
- Special Fund for Agro-scientific Research in the Public Interest [201303023]
- Open Research Fund Program of Jiangsu Key Laboratory of Pesticide Science [NYXKT201202]
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Chilling tolerance was increased in seed germination and root growth of wheat seedlings grown in media containing 20 mu g/mL cerebroside C (CC), isolated from the endophytic Phyllosticta sp. TG78. Seeds treated with 20 mu g/mL CC at 4 degrees C expressed the higher germination rate (77.78%), potential (23.46%), index (3.44) and the shorter germination time (6.19 d); root growth was also significantly improved by 13.76% in length, 13.44% in fresh weight and 6.88% in dry mass compared to controls. During the cultivation process at 4 degrees C for three days and the followed 24 h at 25 degrees C, lipid peroxidation, expressed by malondialdehyde (MDA) content and relative membrane permeability (RMP) was significantly reduced in CC-treated roots; activities of lipoxygenase (LOX), phospholipid C (PLC) and phospholipid D (PLD) were inhibited by 13.62-62.26%, 13.54-63.93% and 13.90-61.17%, respectively; unsaturation degree of fatty acids was enhanced through detecting the contents of CC-induced linoleic acid, linolenic acid, palmitic acid and stearic acid using GC-MS; capacities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) were individually increased by 7.69-46.06%, 3.37-37.96%, and 27.00-178.07%. These results suggest that increased chilling tolerance may be due, in part, to the reduction of lipid peroxidation and alternation of lipid composition of roots in the presence of CC.
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