Külheim Carsten, Agren Jon, Jansson Stefan
Umeå Plant Science Center, Department of Plant Physiology, Umeå University, SE-901 87 Umeå, Sweden.
Science. 2002 Jul 5;297(5578):91-3. doi: 10.1126/science.1072359.
We used Arabidopsis thaliana mutants to examine how a photosynthetic regulatory process, the qE-type or DeltapH-dependent nonphotochemical quenching, hereafter named feedback de-excitation, influences plant fitness in different light environments. We show that the feedback de-excitation is important for plant fitness in the field and in fluctuating light in a controlled environment but that it does not affect plant performance under constant light conditions. Our findings demonstrate that the feedback de-excitation confers a strong fitness advantage under field conditions and suggest that this advantage is due to the increase in plant tolerance to variation in light intensity rather than tolerance to high-intensity light itself.
我们利用拟南芥突变体来研究一种光合调节过程，即qE型或依赖ΔpH的非光化学猝灭（以下简称反馈去激发）如何影响植物在不同光照环境下的适应性。我们发现，反馈去激发对于田间以及可控环境中波动光照下的植物适应性很重要，但在恒定光照条件下并不影响植物表现。我们的研究结果表明，反馈去激发在田间条件下赋予了强大的适应性优势，并表明这种优势源于植物对光照强度变化耐受性的增加，而非对高强度光照本身的耐受性。
