Determination Of Physiological And Biochemical Characteristics Of Aging Seeds Of Apocynum In Inner Mongolia

The experimental material is from the College of agriculture farm harvest in 2010> 2011、2012、2013 from Apocynum seed, The deterioration law of its activity during seed aging, changes of the main reasons forme decrease of the activity and some physiological and biochemical characteristics. In order to maximize the preservation of Apocynum seeds and provide a theoretical basis and reasonable preservation; Apocynum seed, maintain its germination rate and seed activity, ensure the seed quality of life in a suitable range, has very important significance to meet the needs of large industrial production. The main results are as follows:1、In different years, Apocynum seed germination rate decreased along with the increase of storage time. Description of Apocynum seed life and storage period has a negative correlation between direct.2、The relationship between Apocynum seed reducing sugar, soluble sugar and aging: In the seeds of Apocynum natural storage conditions of reducing sugar, soluble sugar increased with storage time decreased. In 2010,2011 and 2012 of the reducing sugar content of seeds of Apocynum Apocynum seed in 2013 than the reducing sugar content decreased by 20.44%,6.15%,5.37%, soluble sugar decreased by 20.10%,8.03%,4.17%. From this we can know the apocynum seeds under natural conditions with the aging and extend its internal storage substance in seed. Secondly, Apocynum venetum seeds with different moisture, reducing sugar content decreased with the increase of storage time, and the water content is higher, faster the reduced; due to the decomposition of reducing sugar, soluble sugar, has led to increased, but increased to a certain degree, the higher seed moisture content, seed activity the larger, the decomposition rate is also more and more open, the content of soluble sugar in storage period began to decline.3% Apocynum seed of superoxide dismutase (SOD) and aging:In the natural storage conditions of Apocynum seeds of superoxide dismutase activity with prolonged storage time decreased. In 2013, the latest of Apocynum venetum seeds so superoxide dismutase activity was the highest. In 2010,2011 and 2012 of Apocynum seed activity of superoxide dismutase in 2013 than the seeds of Apocynum superoxide dismutase activity were decreased by 24.14%,19.16% and 15.71%. And different water content, the activity of SOD also has a big impact, too high or too low water content and the activity of SOD by restriction.4、Apocynum seed peroxidase (POD) and aging:In the seeds of Apocynum natural storage conditions in peroxidase activity with prolonged storage time decreased. From the seeds of Apocynum superoxide dismutase and peroxidase trends can be drawn of Apocynum seeds under natural conditions with the aging and extend its internal free radical scavenging system weakened, reducing activity in seeds. The experiment also proved that under the condition of high temperature, help the internal free radical scavenging system reduced, thereby reducing the viability of seeds; and maintain appropriate seed moisture content, but also an important way to ensure the viability of seeds.5、Apocynum seed malondialdehyde (MDA) and aging:In the seeds of Apocynum natural storage conditions in MDA content with prolonged storage year increased signincuntly. MDA content of 2010,2011,2012 and 2013 respectively in the 18.06452,11.1828.10.4080,7.741935 of Apocynum seeds. The seeds of Apocynum seed aging with internal accumulation of toxic substances. At the same time, the experiment also shows that, is conducive to the accumulation of MDA in the condition of high temperature, acceleration of seed aging.