Open AccessComparison of Cold Resistance between Aboveground and Underground of Sedum aizoon L. Seedling with Sprout under Low Temperature
Author(s) -
Yan Chen,
Haixia Wang,
Zhimin He
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/330/3/032106
Subject(s) - seedling , proline , sugar , horticulture , malondialdehyde , water content , botany , dormancy , biology , chemistry , agronomy , germination , food science , biochemistry , geotechnical engineering , amino acid , engineering , antioxidant
The difference of cold resistance between aboveground and underground parts was compared by measuring the growth and cold-resistance physiology of dormancy-released Sedum aizoon L. seedling with sprout at -5, 0 and 5 degrees Celsius respectively. The results showed that with the decreasing temperature, the plant height and root length all showed a downward trend, and the plant height decreased more than root length. The aboveground fresh weight showed an upward trend, while the underground fresh weight showed a downward first and then upward trend. The relative electrical conductivity (REC), tissue water content, total soluble sugar and free proline content all showed an upward trend, while malondialdehyde (MDA) content showed a downward trend in leaves. The content of soluble protein showed a downward first and then upward trend in leaves. The changing trend of roots was the same as leaves in REC, total soluble sugar and soluble protein content, but the REC of roots increased less than leaves. There was no significant change in tissue water content, free proline and MDA content in roots. At the same low temperature, roots were all higher than leaves in the content of total soluble sugar and soluble protein, while the tissue water content and MDA content were the contrary. In conclusion, the cold resistance of the underground part was stronger than aboveground part in Sedum aizoon L. seedling with sprout.