LIPID-PEROXIDATION ASSOCIATED WITH ACCELERATED AGING OF SOYBEAN AXES
LIPID-PEROXIDATION ASSOCIATED WITH ACCELERATED AGING OF SOYBEAN AXES
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DOI：
10.1104/pp.65.2.245
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发表时间：
1980-01-01
期刊：
影响因子：
7.4
通讯作者：
BEWLEY, JD
中科院分区：
文献类型：
--
作者：
STEWART, RRC;BEWLEY, JD
大豆种子在高温高湿条件下贮藏时老化迅速。这种老化种子的轴含有高水平的丙二醛，这是不饱和脂肪酸过氧化的产物。极性脂质（磷脂）部分中亚油酸（18：2）和亚麻酸（18：3）的水平在老化过程中降低，在老化后劣化过程中更显着。这些变化都没有发生在种子已被储存在高温，但相对湿度低。在任何未吸胀的种子中均未检测到超氧化物歧化酶活性。在有活力的种子中，吸胀开始后1.5小时即可检测到活性，但在老化5小时后的种子中未发现活性。衰老显然会导致脂质过氧化变化，这些变化可能会导致生存能力的丧失。
Soybean seeds age rapidly during storage at high temperature and high relative humidity. The axes of such aged seeds contain high levels of malondialdehyde, a product of the peroxidation of unsaturated fatty acids. The levels of linoleic (18:2) and linolenic (18:3) acids in a polar lipid (phospholipid) fraction decrease during aging and more dramatically during postaging deterioration. None of these changes occurred in seeds that have been stored at high temperature but low relative humidity. No superoxide dismutase activity was detected in any nonimbibed seed. In viable seeds, activity was detectable 1.5 h after the onset of imbibition, but none was found in aged seeds up to 5 h. Aging apparently leads to peroxidative changes to lipids, and these could contribute to loss of viability.