Effective use of high CO₂ efflux at the soil surface in a tropical understory plant.
Effective use of high CO₂ efflux at the soil surface in a tropical understory plant.
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在热带地下工厂的土壤表面有效使用高co₂外排。
DOI：
10.1038/srep08991
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发表时间：
2015-03-11
影响因子：
4.6
通讯作者：
Yoshimura J
中科院分区：
文献类型：
--
作者：
Ishida A;Nakano T;Adachi M;Yoshimura K;Osada N;Ladpala P;Diloksumpun S;Puangchit L;Yoshimura J
许多陆生植物都是在中生代进化的C3植物，当时大气中的CO2浓度（[CO2]）较高。在目前的条件下，C3植物无法再从高环境[CO2]中受益。Kaempferia marginata Carey是泰国热带干燥森林中一种独特的林下姜植物。这种植物有两片大而平的叶子，分布在土壤表面。我们发现，土壤表面和树叶之间的部分封闭空间（638 µmol mol−1）与地面以上20 cm处的大气（412 µmol mol−1）之间的[CO2]存在很大差异。 这一发现表明植物从土壤中捕获CO2流出。几乎所有的气孔都分布在叶的背面。当环境空气[CO2]从400 μ mol mol − 1增加到600 μmol mol−1时，在接近光饱和的条件下，净光合速率增加了45%到48%。在弱光条件下未观察到显著增加。这些数据表明，独特的叶片结构，提高了碳增益，通过捕获土壤CO2流出气孔网站在相对较高的光照条件下，这表明环境空气[CO2]可以作为一个重要的选择剂陆生C3植物。
Many terrestrial plants are C3 plants that evolved in the Mesozoic Era when atmospheric CO2 concentrations ([CO2]) were high. Given current conditions, C3 plants can no longer benefit from high ambient [CO2]. Kaempferia marginata Carey is a unique understory ginger plant in the tropical dry forests of Thailand. The plant has two large flat leaves that spread on the soil surface. We found a large difference in [CO2] between the partly closed space between the soil surface and the leaves (638 µmol mol−1) and the atmosphere at 20 cm above ground level (412 µmol mol−1). This finding indicates that the plants capture CO2 efflux from the soil. Almost all of the stomata are located on the abaxial leaf surface. When ambient air [CO2] was experimentally increased from 400 to 600 μmol mol−1, net photosynthetic rates increased by 45 to 48% under near light-saturated conditions. No significant increase was observed under low light conditions. These data demonstrate that the unique leaf structure enhances carbon gain by trapping soil CO2 efflux at stomatal sites under relatively high light conditions, suggesting that ambient air [CO2] can serve as an important selective agent for terrestrial C3 plants.
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影响因子：
1.5
作者：
Araki, Masatake G.;Utsugi, Hajime;Chiba, Yukihiro
通讯作者：
Chiba, Yukihiro
DOI：
10.1098/rstb.2011.0261
发表时间：
2012-02-19
影响因子：
6.3
作者：
Osborne, Colin P.;Sack, Lawren
通讯作者：
Sack, Lawren
影响因子：
6.2
作者：
Kondo, M;Muraoka, H;Koizumi, H
通讯作者：
Koizumi, H
影响因子：
6.2
作者：
Sternberg, LDS;Moreira, MZ;Nepstad, DC
通讯作者：
Nepstad, DC
影响因子：
2
作者：
Bekku, Yukiko Sakata;Sakata, Tsuyoshi;Nakano, Takashi
通讯作者：
Nakano, Takashi