National Institute of Plant Genome Research, New Delhi, India.
Agriculture Biotechnology Department, National Agri-Food Biotechnology Institute, Mohali, Punjab, India.
Physiol Plant. 2021 Jun;172(2):847-868. doi: 10.1111/ppl.13268. Epub 2020 Nov 22.
Amid apprehension of global climate change, crop plants are inevitably confronted with a myriad of abiotic stress factors during their growth that inflicts a serious threat to their development and overall productivity. These abiotic stresses comprise extreme temperature, pH, high saline soil, and drought stress. Among different abiotic stresses, drought is considered the most calamitous stressor with its serious impact on the crops' yield stability. The development of climate-resilient crops that withstands reduced water availability is a major focus of the scientific fraternity to ensure the food security of the sharply increasing population. Numerous studies aim to recognize the key regulators of molecular and biochemical processes associated with drought stress tolerance response. A few potential candidates are now considered as promising targets for crop improvement. Transcription factors act as a key regulatory switch controlling the gene expression of diverse biological processes and, eventually, the metabolic processes. Understanding the role and regulation of the transcription factors will facilitate the crop improvement strategies intending to develop and deliver agronomically-superior crops. Therefore, in this review, we have emphasized the molecular avenues of the transcription factors that can be exploited to engineer drought tolerance potential in crop plants. We have discussed the molecular role of several transcription factors, such as basic leucine zipper (bZIP), dehydration responsive element binding (DREB), DNA binding with one finger (DOF), heat shock factor (HSF), MYB, NAC, TEOSINTE BRANCHED1/CYCLOIDEA/PCF (TCP), and WRKY. We have also highlighted candidate transcription factors that can be used for the development of drought-tolerant crops.
在全球气候变化的担忧下,作物在生长过程中不可避免地会遇到各种非生物胁迫因素,这些因素严重威胁着它们的发展和整体生产力。这些非生物胁迫因素包括极端温度、pH 值、高盐土壤和干旱胁迫。在不同的非生物胁迫中,干旱被认为是最具灾难性的胁迫因素,对作物产量稳定性的影响最为严重。培育具有抗旱性的作物以适应水资源减少是科学界的主要关注点,以确保急剧增长的人口的粮食安全。许多研究旨在识别与干旱胁迫耐受反应相关的分子和生化过程的关键调节剂。一些潜在的候选者现在被认为是作物改良的有前途的目标。转录因子作为一个关键的调控开关,控制着各种生物过程的基因表达,最终控制着代谢过程。了解转录因子的作用和调控机制将有助于制定和实施旨在培育具有优良农艺性状的作物的改良策略。因此,在这篇综述中,我们强调了转录因子的分子途径,可以利用这些途径来工程化作物的抗旱潜力。我们讨论了几种转录因子的分子作用,如碱性亮氨酸拉链(bZIP)、脱水响应元件结合(DREB)、具有一个手指的 DNA 结合(DOF)、热休克因子(HSF)、MYB、NAC、TEOSINTE BRANCHED1/CYCLOIDEA/PCF(TCP)和 WRKY。我们还强调了可用于开发抗旱作物的候选转录因子。