论文部分内容阅读
本研究设置2个臭氧浓度处理,即空气对照(CK,臭氧浓度约4～10 nL·L-1),臭氧浓度升高处理(O3,8 h平均浓度为110 nL·L-1),利用13C同位素示踪的方法,模拟研究了臭氧浓度升高对水稻碳固定和迁移的影响。结果表明:臭氧浓度升高后减少了植株对13C的固定,两次标记时臭氧处理下植株总的13C固定分别比对照处理低37.8%和20.0%;臭氧浓度升高处理1个月和2个月后叶片的13C分配相对于对照而言分别提高了47.3%和37.5%;而臭氧处理则降低了茎和根中的碳分配;臭氧浓度升高后叶的库强有明显的提高,而根的库强则明显降低,茎的库强虽有所降低但不明显;臭氧处理1个月和2个月后植株叶片的相对吸收能力分别比对照显著提高了48.5%和93.3%,臭氧处理下根的相对吸收能力则显著降低。
In this study, two ozone concentration treatments (CK, ozone concentration of about 4 ~ 10 nL·L-1) and ozone concentration (O3,8 h average concentration of 110 nL·L-1) 13C isotope tracing method to simulate the effects of elevated ozone on carbon fixation and migration in rice. The results showed that the increase of ozone concentration decreased the plant immobilization to 13C, and the total 13C fixation of plants under ozone treatment was 37.8% and 20.0% lower than that of the control under the ozone treatment. The ozone concentration was increased by 1 month and 2 After 13 months, the 13C distribution of leaves increased by 47.3% and 37.5% respectively compared with that of the control, while the ozone treatment reduced the carbon distribution in the stem and the roots. The leaf strength increased significantly after the ozone concentration increased, While the relative intensities of plant leaves at 1 month and 2 months after ozone treatment were significantly increased by 48.5% and 93.3%, respectively. Under ozone treatment The relative abilities of roots are significantly reduced.