Effects of MC-RR on the seed germination and characteristics of physiologyand biochemistry in Trifolium repens seedlings

Abstract

Abstract: The seed and seedlings of Trifolium repens were treated with various concentrations of MC-RR. The effects of MC-RR on the seed germination, the change of antioxidant enzymes and the regulation of MC-RR accumulation in T. repens were studied in this paper. The results showed that the germination percentage and the germinating viability decreased with the increase of MC-RR concentration. When at the higher concentration, the germination percentage and the germinating viability significantly decreased compared with the control. Shoot height markedly inhibited with the rising of MC-RR concentration. Root length and fresh weight significantly increased under the lower concentration, whereas they markedly reduced at the higher concentration. The changes of antioxidant enzymes were different each other. SOD activity indicated the trend of increase-decrease-increase compared with the control. POD activity illustrated that it increased firstly and then decreased. However, the trend of CAT activity was different from SOD and POD. The MC-RR content of T. repens increased with the treating concentration compared with the concentration of 0.05 mg/L, whereas bioconcentration factor (BCF) decreased. All the results suggested that the seed and seedlings of T. repens would be damaged seriously with the increase of MC-RR concentration.

CLC Number:

XUE Yan-feng,LI Hui-ming,YI Neng,LI You-qin,SHI Zhi-qi. Effects of MC-RR on the seed germination and characteristics of physiologyand biochemistry in Trifolium repens seedlings[J]. Acta Prataculturae Sinica, 2009, 18(6): 180-185.

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