一种新的NAC转录因子ZmNAC55对Zea mays的干旱压力产生负面调节
Kai Fan1, Yuchen Wu1, Zhijun Mao1
1Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Key Laboratory of Biological Breeding for Fujian and Taiwan Crops, Ministry of Agriculture and Rural Affairs, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
Plant physiology and biochemistry : PPB
|July 27, 2024
概括
研究人员确定了ZmNAC55,这是玉米中一种新的NAC转录因子,它对干旱压力的负面调节. 了解ZmNAC55的功能是改善玉米抗旱能力的关键.
科学领域:
- 植物分子生物学 植物分子生物学
- 农业科学 农业科学
- 遗传学 是一个遗传学.
背景情况:
- 干旱压力显著限制了玉米的产量.
- 识别抗干旱的新基因和机制对于玉米的改善至关重要.
- NAC转录因子在植物应激反应中的作用是一个活跃的研究领域.
研究的目的:
- 在玉米 (Zea mays) 中识别和表征一种新的NAC转录因子ZmNAC55.
- 为了研究ZmNAC55在干旱应激反应中的功能.
- 阐明ZmNAC55调节干旱耐受性的分子机制.
主要方法:
- 鉴定和描述ZmNAC55基因及其蛋白质结构.
- 在干旱压力下分析ZmNAC55表达模式.
- 在阿拉比多普西斯中使用过度表达和在玉米中使用低表达的ZmNAC55的功能分析.
- 研究ZmNAC55在活性氧物种 (ROS) 生产和调节下游基因 (如ZmHOP3.3) 中的作用.
主要成果:
- ZmNAC55是一种具有转录激活活性的核蛋白,在玉米叶中受到干旱压力的高度诱导.
- 在阿拉比多普西斯中ZmNAC55的过度表达导致干旱敏感性增加,而在玉米中表达不足增加了干旱耐受性.
- 通过激活ZmHOP3表达,ZmNAC55在调节ROS产量方面发挥着至关重要的作用,并对干旱耐受性产生负面影响.
结论:
- NAC转录因子ZmNAC55负面调节玉米的干旱压力,主要是通过激活ZmHOP3.
- ZmNAC55代表了一种有希望的基因候选基因,用于基因工程,以提高玉米品种的抗旱能力.
更多相关视频
相关概念视频
Responses to Drought and Flooding
10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.6K
Regulation of Transpiration by Stomata
28.1K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
28.1K
Adaptations that Reduce Water Loss
25.4K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.4K
Transcription
146.8K
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
146.8K
Responses to Salt Stress
13.1K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.1K
Responses to Heat and Cold Stress
13.4K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.4K


