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- W2025680510 abstract "Abstract The cotyledons of cucumber were used to investigate the effects of Nd 3+ and La 3+ on physiological characters in respect of plant resistance. The cucumber cotyledons were sprayed with 15 μg · ml −1 Nd 3+ and La 3+ , and the changes on salicylic acid (SA) and SA 2-O-β-glucoside (SAG) contents, the generation of · O 2 − , and β-1, 3-glucanase and chitinase activities were measured. The results demonstrated that the yields of endogenous SA and SAG in cucumber cotyledons were enhanced significantly in a short time in response to Nd 3+ and La 3+ treatments. At 3 h after La 3+ treatment, the levels of SA and SAG reached the maximum, with 4.3 and 3.3-fold of that in control (CK), respectively. At 12 h after Nd 3- treatment, the contents of SA and SAG reached peak levels, increased by 4.5 and 3.0-fold of that in control (CK), respectively. These two components were kept in a higher level up to 72 h after treatment. The generation rate of · O 2 − increased gradually in the treatments of Nd 3+ or La 3+ , and then decreased in cucumber at 12 h. β-1,3-glucanase activity reached peak at 3 h, while chitinase activity reached peak at 12 h, and then both decreased gradually in Nd 3- or La 3- treatments. At 72 h after treatment, activities of β-1, 3-glucanase and chitinase increased by about 30% and 50%, as compared with CK. Therefore, these results suggested that both Nd 3+ and La 3+ could increase the contents of endogenous SA and its related factors which induce plant resistance through the signal pathway of the salicylic acid." @default.
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- W2025680510 date "2007-08-01" @default.
- W2025680510 modified "2023-09-24" @default.
- W2025680510 title "Inducement of Salicylic Acid in Cucumber Cotyledons by Neodymium and Lanthanum" @default.
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- W2025680510 doi "https://doi.org/10.1016/s1002-0721(07)60464-5" @default.
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