Determination of photosynthetic parameters Vcmax and Jmax for a C3 plant (spring hulless barley) at two altitudes on the Tibetan Plateau
Determination of photosynthetic parameters Vcmax and Jmax for a C3 plant (spring hulless barley) at two altitudes on the Tibetan Plateau
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青藏高原两个海拔高度C3植物（春青稞）光合参数Vcmax和Jmax的测定
DOI：
10.1016/j.agrformet.2011.06.004
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发表时间：
2011-12
影响因子：
6.2
通讯作者：
钟志明
中科院分区：
文献类型：
--
作者：
范玉枝;张宪洲;钟志明
On the Tibetan Plateau, the unique alpine climate factors of low air pressure, low CO2partial pressure and low air temperature have significant but non-explicit influences on the photosynthetic capacity of plants. To evaluate these influences, we measured the net photosynthetic rates for spring hulless barley leaves at two altitudes of 3688m (the low altitude) and 4333m (the high altitude), respectively. Two photosynthetic parameters—Vcmax, the maximum rate of Rubisco carboxylase activity, and Jmax, the maximum rate of photosynthetic electron transport—were determined. The net photosynthetic rate and the photosynthetic parameters Vcmaxand Jmaxwere higher for leaves from plants grown at the high altitude than for those at the low altitude. Vcmaxand Jmaxwere approximately 24% and 22% greater, respectively, for leaves from plants grown at the high altitude. The CO2and air temperature at the high altitude were lower than those at the low altitude. As a consequence, plants exposed to lower CO2partial pressure and lower air temperature have a higher photosynthetic capacity on the Tibetan Plateau. The optimal temperatures for Vcmaxand Jmaxwere approximately 6.5% and 3.5% higher, respectively, in leaves from plants grown at the high altitude than those grown at the low altitude, and the ratio of Jmaxto Vcmaxwas 12.7% lower at the low altitude. Simulation analyses revealed that the photosynthetic capacities of plants decreased after long-term increases in CO2partial pressure and temperature associated with global climate change on the Tibetan Plateau.
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影响因子：
5.7
作者：
W. Cannon;B. Roberts
通讯作者：
W. Cannon;B. Roberts
影响因子：
7.3
作者：
B. Medlyn;D. Loustau;S. Delzon
通讯作者：
B. Medlyn;D. Loustau;S. Delzon
影响因子：
--
作者：
Wen-feng Qi;Jinjun Zhou
通讯作者：
Wen-feng Qi;Jinjun Zhou
影响因子：
6.9
作者：
Hikosaka, K;Ishikawa, K;Onoda, Y
通讯作者：
Onoda, Y
影响因子：
2.7
作者：
KORNER, C
通讯作者：
KORNER, C