Qiu Fan, Bachle Seton, Estes Ryan, Duvall Melvin R, Nippert Jesse B, Ungerer Mark C
Division of Biology, Kansas State University, Manhattan, KS, USA.
Department of Biological Sciences and Plant Molecular and Bioinformatics Center, Northern Illinois University, DeKalb, IL, USA.
Genome. 2021 Jan;64(1):15-27. doi: 10.1139/gen-2020-0055. Epub 2020 Oct 1.
Water stress associated with drought-like conditions is a major factor limiting plant growth and impacts productivity of natural plant communities and agricultural crops. Molecular responses of plants to water stress have been studied most extensively in model species and crops, few of which have evolved natural drought tolerance. In the current study, we examined physiological and transcriptomic responses at multiple timepoints during increasing water stress and following initial recovery from stress in a drought-tolerant C species, . Results demonstrated non-linear transcriptomic changes during increasing stress, but largely linear declines in physiological measurements during this same period. Transcription factors represented approximately 12.7% of all differentially expressed genes. In total, 117 homologs of previously identified and molecularly characterized drought-responsive plant genes were identified. This information will be valuable for further investigations of the molecular mechanisms involved in drought tolerance in C plants.
与干旱样条件相关的水分胁迫是限制植物生长的主要因素，影响天然植物群落和农作物的生产力。植物对水分胁迫的分子反应在模式物种和作物中研究最为广泛，其中很少有物种进化出天然耐旱性。在本研究中，我们在耐旱C物种水分胁迫增加期间及胁迫初始恢复后的多个时间点检查了生理和转录组反应。结果表明，在胁迫增加期间转录组发生非线性变化，但同期生理测量值大致呈线性下降。转录因子约占所有差异表达基因的12.7%。总共鉴定出117个先前已鉴定并进行分子表征的干旱响应植物基因的同源物。这些信息对于进一步研究C植物耐旱性的分子机制将是有价值的。
