Effects of various concentrations of EGCG on seed germination and resistance in cucumber under NaCl stress

doi:10.3969/j.issn.1004-1524.2018.07.08

›› 2018, Vol. 30 ›› Issue (7): 1160-1167.DOI: 10.3969/j.issn.1004-1524.2018.07.08

• Horticultural Science • Previous Articles Next Articles

Effects of various concentrations of EGCG on seed germination and resistance in cucumber under NaCl stress

LI Yang^{1, 2}, LIU Kai¹, WEI Jipeng², ZHANG Lan², LI Xin^{2, *}, HAN Wenyan^{2, *}, LI Qingyun^{1, *}

1.Horticulture College, Hebei Agricultural University, Baoding 071000, China;
2. Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China

Received:2017-12-10 Online:2018-07-20 Published:2018-08-02

Abstract

Abstract: The present study investigated the effects of exogenous application with various concentrations of EGCG (epigallocatechin gallate) on seed germination, malondialdehyde (MDA) content and activities of antioxidant enzymes in radicles of cucumber under NaCl stress. Results showed that, without salt stress, seed germination, radicle length and root branch number responded differently to various concentrations of EGCG. While those were significantly restrained under 200 mmol·L^-1 NaCl treatment, accompanying the great increases in content of MDA and activities of antioxidant enzymes. Furthermore, application with various concentrations of EGCG(10, 100, 1 000 μmol·L^-1)could significantly increase seed germination, radicle length and root branch number under NaCl stress. Moreover, EGCG application decreased MDA content by improving the activities of antioxidant enzymes (APX, CAT, SOD and POD) under NaCl stress. And the treatment with 100 μmol·L^-1 EGCG performed best. These results suggested that exogenous EGCG could enhance seed germination and mitigate NaCl-induced salt stress through promoting the activities of antioxidant enzymes in cucumber.

Key words: EGCG, cucumber, NaCl, salt stress, seed germination, MDA, antioxidant enzyme activity

CLC Number:

S642.2

LI Yang, LIU Kai, WEI Jipeng, ZHANG Lan, LI Xin, HAN Wenyan, LI Qingyun. Effects of various concentrations of EGCG on seed germination and resistance in cucumber under NaCl stress[J]. , 2018, 30(7): 1160-1167.

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Effects of various concentrations of EGCG on seed germination and resistance in cucumber under NaCl stress

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