来自Schima superba和Cunninghamia lanceolata的异oprenoid排放:它们对两个变暖设施升高的温度的反应
Fangyuan Ma1, Geye Zhang2, Junchuan Zhang2
1College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, Guangdong 511443, China.
The Science of the total environment
|April 27, 2024
概括
变暖最初增加了Schima superba和Cunninghamia lanceolata幼苗的异类排放量,但在四个月后抑制了它们. 加热电线比红外辐射器造成更大的生理干扰.
科学领域:
- 生物地质化学生物地质化学
- 植物生理学 植物生理学
- 大气化学 大气化学
背景情况:
- 包括异二烯 (ISO) 和单二烯 (MTs) 在内的异二烯是主要的生物原挥发性有机化合物 (BVOC),对陆地生态系统至关重要.
- 关于全球变暖对异oprenoid 排放的影响的先前研究显示出不同的结果,导致持续的辩论.
研究的目的:
- 调查不同变暖设施对两个亚热带树种异oprenoid排放的影响.
- 评估异oprenoid排放对一个,两个和四个月的变暖的时间反应.
主要方法:
- 在没有加热 (CK),红外散热器 (IR) 和加热电线 (HW) 的开放式顶部室 (OTC) 中种植Schima superba和Cunninghamia lanceolata幼苗.
- 使用预度器-GC-MS系统测量异oprenoid排放量.
- 分析生理参数,如净光合作用 (Pn) 和透气率 (Tr),以及单合成酶 (MTPS) 活性.
主要成果:
- 一个月后,IR和HW都在两个物种中最初刺激了异oprenoid排放,并观察到显著增加.
- 四个月后,排放量被抑制,HW的影响更为明显.
- 异oprenoid排放与Pn,Tr和MTPS活动有关,单烯是两种物种释放的主要化合物.
结论:
- 变暖对异oprenoid排放的影响是物种特异的,取决于变暖方法和持续时间.
- 与红外辐射器相比,加热电线引起的生理干扰更大.
- 结果支持将温度升高实验整合到评估森林碳循环对全球变暖的反应中.
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