Effects of dehydration degree on the physiological and chemical characteristics of Camellia oleifera seedlings
Relationship between the dehydration degree of Camellia oleifera seedlings and the enzyme ac-tivities of polyphenoloxidase(PPO),peroxidase(POD),catalase(CAT),and other characteristics such as the content of MDA,the relative conductivity and planting survival rate were studied in this paper.The results showed that when the oil-tea seedlings dehydrated by 10%,20%,30% and 40%,the activity of PPO were respectively 0.654,0.734,0.612 and 0.513 U·min-1·g-1;the activity of POD were respectively 13.635,16.514,12.511 and 9.021 U·min-1·g-1;the activity of CAT were respectively 3.153,4.021,3.011 and 1.412 U·min-1·g-1;the content of MDA were respectively 45.28,50.98,61.42 and 73.72 μmol·g-1;the relative conductivity were respectively 34.88%,38.07%,48.90% and 50.45%;the planting survival rates were respectively 91.1%,80.0%,6.7% and 0%.The seedlings should be kept fresh and the dehydration degree maintains within 20% in the planting process.