Blue light and CO(2) signals converge to regulate light-induced stomatal opening.
Blue light and CO(2) signals converge to regulate light-induced stomatal opening.
复制标题
DOI：
10.1038/s41467-017-01237-5
复制
发表时间：
2017-11-03
影响因子：
16.6
通讯作者：
Shimazaki KI
中科院分区：
文献类型：
--
作者：
Hiyama A;Takemiya A;Munemasa S;Okuma E;Sugiyama N;Tada Y;Murata Y;Shimazaki KI
气孔通过整合开闭信号来调节植物与大气之间的气体交换。气孔开放响应低CO2浓度，以最大限度地提高光合作用的光，然而，协调光合作用和气孔导度的机制还有待确定。在这里，我们确定和表征CBC 1/2（会聚蓝光（BL）和CO2 1/2），两个激酶，链接BL，光合有效辐射（PAR）的主要组成部分，和信号低浓度的CO2在保卫细胞。CBC 1/CBC 2冗余刺激气孔开放的抑制S型阴离子通道响应BL和低浓度CO2。CBC 1/CBC 2在向光蛋白和HT 1（高叶温1）的信号传导途径中起作用。CBC 1/CBC 2与HT 1相互作用并被其磷酸化。我们认为CBCs通过整合来自BL和CO2的信号来调节气孔开度，并作为BL和低CO2信号的会聚点。 气孔在低CO2条件下打开，以最大限度地提高光合作用。在这里，Hiyama等人鉴定了两种激酶，其通过抑制phototropin和HT 1下游的S型阴离子通道来促进气孔开放，从而充当蓝光和CO2信号传导的会聚点。
Stomata regulate gas exchange between plants and atmosphere by integrating opening and closing signals. Stomata open in response to low CO2 concentrations to maximize photosynthesis in the light; however, the mechanisms that coordinate photosynthesis and stomatal conductance have yet to be identified. Here we identify and characterize CBC1/2 (CONVERGENCE OF BLUE LIGHT (BL) AND CO2 1/2), two kinases that link BL, a major component of photosynthetically active radiation (PAR), and the signals from low concentrations of CO2 in guard cells. CBC1/CBC2 redundantly stimulate stomatal opening by inhibition of S-type anion channels in response to both BL and low concentrations of CO2. CBC1/CBC2 function in the signaling pathways of phototropins and HT1 (HIGH LEAF TEMPERATURE 1). CBC1/CBC2 interact with and are phosphorylated by HT1. We propose that CBCs regulate stomatal aperture by integrating signals from BL and CO2 and act as the convergence site for signals from BL and low CO2. Stomata open in response to low CO2 conditions in the light to maximise photosynthesis. Here, Hiyama et al. identify two kinases that promote stomatal opening by inhibiting S-type anion channels downstream of phototropin and HT1 thereby acting as a convergence point for blue light and CO2 signaling.
登录
查看更多内容
RAF样激酶HT1基因中的显性和隐性突变完全破坏了拟南芥中对CO2的气孔反应。
影响因子：
6.9
作者：
Hashimoto-Sugimoto M;Negi J;Monda K;Higaki T;Isogai Y;Nakano T;Hasezawa S;Iba K
通讯作者：
Iba K
DOI：
10.1073/pnas.0912021106
发表时间：
2009-12-15
影响因子：
11.1
作者：
Geiger, Dietmar;Scherzer, Soenke;Hedrich, Rainer
通讯作者：
Hedrich, Rainer
影响因子：
20.5
作者：
Engineer CB;Hashimoto-Sugimoto M;Negi J;Israelsson-Nordström M;Azoulay-Shemer T;Rappel WJ;Iba K;Schroeder JI
通讯作者：
Schroeder JI
DOI：
10.1073/pnas.82.23.8019
发表时间：
1985-01-01
影响因子：
11.1
作者：
IINO, M;OGAWA, T;ZEIGER, E
通讯作者：
ZEIGER, E
影响因子：
11.4
作者：
Kinoshita, T;Shimazaki, K
通讯作者：
Shimazaki, K