Pareek Amit, Khurana Ashima, Sharma Arun K, Kumar Rahul
Department of Plant Molecular Biology, University of Delhi, South Campus, Benito Juarez Road, Dhaula Kuan, New Delhi-110021, India.
Ashima Khurana, Botany Department, Zakir Husain Delhi College, University of Delhi, New Delhi-110002, India.
Curr Genomics. 2017 Dec;18(6):498-511. doi: 10.2174/1389202918666170228141345.
Plants, being sessile organisms, constantly withstand environmental fluctuations, including low-temperature, also referred as cold stress. Whereas cold poses serious challenges at both physiological and developmental levels to plants growing in tropical or sub-tropical regions, plants from temperate climatic regions can withstand chilling or freezing temperatures. Several cold inducible genes have already been isolated and used in transgenic approach to generate cold tolerant plants. The conventional breeding methods and marker assisted selection have helped in developing plant with improved cold tolerance, however, the development of freezing tolerant plants through cold acclimation remains an unaccomplished task. Therefore, it is essential to have a clear understanding of how low temperature sensing strategies and corresponding signal transduction act during cold acclimation process. Herein, we synthesize the available information on the molecular mechanisms underlying cold sensing and signaling with an aim that the summarized literature will help develop efficient strategies to obtain cold tolerant plants.
植物作为固着生物,不断承受包括低温(也称为冷胁迫)在内的环境波动。虽然寒冷在生理和发育层面给生长在热带或亚热带地区的植物带来严峻挑战,但来自温带气候地区的植物能够耐受低温或冰冻温度。几个冷诱导基因已被分离出来,并用于转基因方法以培育耐寒植物。传统育种方法和标记辅助选择有助于培育出耐寒性提高的植物,然而,通过冷驯化培育耐冻植物仍是一项未完成的任务。因此,清楚了解低温感知策略以及相应的信号转导在冷驯化过程中如何发挥作用至关重要。在此,我们综合了关于冷感知和信号传导潜在分子机制的现有信息,目的是使总结的文献有助于制定获得耐寒植物的有效策略。