Acclimation of Arabidopsis thaliana to the light environment:: the existence of separate low light and high light responses
Acclimation of Arabidopsis thaliana to the light environment:: the existence of separate low light and high light responses
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DOI：
10.1007/s004250100556
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发表时间：
2001-09-01
期刊：
影响因子：
4.3
通讯作者：
Horton, P
中科院分区：
文献类型：
--
作者：
Bailey, S;Walters, RG;Horton, P
拟南芥光合适应能力的研究Heynh。简历。在较宽的辐照范围内评估了生长过程中的直立兰伯格。光合作用的光饱和速率和co2饱和速率（P-max）以及叶绿素a与叶绿素b的比值（Chl a/b）对生长辐照度的响应具有不连续性。P-max和Chl a/b对生长光的响应有明显的三个不同阶段，在低和高辐照范围内增加，在中等辐照范围内平稳。通过测量所有类囊体膜中含有叶绿素的成分，我们揭示了在低辐射和高辐射下不同的生长策略是不连续响应的基础。这些策略除了改变光系统II （LHCII）的主要光收集复合物外，还包括两个反应中心数量的大幅变化以及次要LHCII和LHCI组分水平的显著变化。
The capacity for photosynthetic acclimation in Arabidopsis thaliana (L.) Heynh. cv. Landsberg erecta was assessed during growth over a broad range of irradiance. Discontinuities in the response to growth irradiance were revealed for the light- and CO2-saturated rate of photosynthesis (P-max) and the ratio of chlorophyll a to chlorophyll b (Chl a/b). Three separate phases in the response of P-max and Chl a/b to growth light were evident, with increases at low and high irradiance ranges and a plateau at intermediate irradiance. By measuring all chlorophyll-containing components of the thylakoid membrane that contribute to Chl alb we reveal that distinct strategies for growth at low and high irradiance underlie the discontinuous response. These strategies include, in addition to changes in the major light-harvesting complexes of photosystem II (LHCII) , large shifts in the amounts of both reaction centres as well as significant changes in the levels of minor LHCII and LHCI components.