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• W2363108691 abstract "To study responses of seed germination of 3 kinds of seeds on acid rain stress, rice (O. sativa), wheat (T. aestivum) and rape (B.chinensis var. oleifera) seeds were used as experimental materials, in our test. The purpose was to understand the effects of acid rain on seed germination of various acid-fast plants in acidic deposition area and to determine reasons of growth and decline dynamics of crop population and its yield change. In the meantime, seven simulated acid rain (SAR) solutions of pH 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 and 5.0 and neutral solution (pH6.5) as control group (CK) were used. Pretreatment seeds for the three species were placed in culture dishes with filter sheets to germinate in a culture container kept at a constant temperature of 25℃. Each treatment group involved in three dishes and each dish received 50 seeds. During germination, seeds were exposed to simulated acid rain freshly prepared everyday. The germination indexes (activity of POD, content of MDA) were all studied under acid rain stress in both experiments. The results showed that at the 7th day, the activity of POD of the three seeds increased at lower acidity levels, and then decreased at higher acidity levels, but the content of MDA increased always along with the increase of the stress strength. In this time, the second index of different acidity level was higher than that of CK. Compared with CK, the amplitude of the content of MDA was found: rice (13.4%) wheat (213.7%) rape (324.5%). The responses on acid rain stress of activity for POD and content of MDA of the three species indicated that there was a acidity level significant difference of each index at P0.05 at the 7th day,i.e rice (no significant difference)wheat (3.0)rape(4.0). The experiment data further evidenced that plants could display different sensitivity under the acid rain stress, in which rice had stronger resistance than wheat, and rape was more susceptible to acid rain than rice and wheat. During 3~7 d, the results proved that the changing curves of each physiological topics were not identical. However, as time went on, all of the POD activity increased with different degrees, and the content of MDA also showed the same increase trend. On the other hand, the protective effect was related with acidity levels. Namely, at the same stress time, POD activities of all control groups of rape and wheat seeds were higher than those of CK, and increased along with the acidity levels. But POD activities of rice seed increased at the lower levels,and then decreased at higher levels.However, the content of MDA of three seeds increased always.It may be concluded that the response of the plants tested in the study was in an order with rice wheatrape." @default.
• W2363108691 created "2016-06-24" @default.
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• W2363108691 date "2005-01-01" @default.
• W2363108691 modified "2023-09-23" @default.
• W2363108691 title "Effects of Acid Rain on Activity of Peroxidase (POD) in Seed Germination of Three Plants Under Time Stress" @default.
• W2363108691 hasPublicationYear "2005" @default.
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