D'Amico-Damião Victor, Carvalho Rogério Falleiros
Department of Biology Applied to Agriculture, São Paulo State University, São Paulo, Brazil.
Front Plant Sci. 2018 Dec 19;9:1897. doi: 10.3389/fpls.2018.01897. eCollection 2018.
It is well known that light is a crucial environmental factor that has a fundamental role in plant growth and development from seed germination to fruiting. For this process, plants contain versatile and multifaceted photoreceptor systems to sense variations in the light spectrum and to acclimate to a range of ambient conditions. Five main groups of photoreceptors have been found in higher plants, cryptochromes, phototropins, UVR8, zeitlupes, and phytochromes, but the last one red/far red wavelengths photoreceptor is the most characterized. Among the many responses modulated by phytochromes, these molecules play an important role in biotic and abiotic stress responses, which is one of the most active research topics in plant biology, especially their effect on agronomic traits. However, regarding the light spectrum, it is not surprising to consider that other photoreceptors are also part of the stress response modulated by light. In fact, it has become increasingly evident that cryptochromes, which mainly absorb in the blue light region, also act as key regulators of a range of plant stress responses, such as drought, salinity, heat, and high radiation. However, this information is rarely evidenced in photomorphogenetic studies. Therefore, the scope of the present review is to compile and discuss the evidence on the abiotic stress responses in plants that are modulated by cryptochromes.
众所周知，光是一种关键的环境因素，在植物从种子萌发到结果的生长发育过程中起着基础性作用。对于这一过程，植物拥有多功能且多方面的光受体系统，以感知光谱变化并适应一系列环境条件。在高等植物中已发现五类主要的光受体，即隐花色素、向光素、UVR8、zeitlupes和光敏色素，但最后一种红/远红波长光受体是研究最为深入的。在由光敏色素调节的众多反应中，这些分子在生物和非生物胁迫反应中发挥着重要作用，这是植物生物学中最活跃的研究课题之一，尤其是它们对农艺性状的影响。然而，就光谱而言，认为其他光受体也是光调节的胁迫反应的一部分并不奇怪。事实上，越来越明显的是，主要在蓝光区域吸收的隐花色素也作为一系列植物胁迫反应的关键调节因子，如干旱、盐度、高温和高辐射。然而，这一信息在光形态建成研究中很少得到证实。因此，本综述的范围是汇编和讨论由隐花色素调节的植物非生物胁迫反应的证据。
