TaSnRK2.1-2D Contributes to Drought Tolerance by Modulating ROS Production in Wheat.

IF 6 1区 生物学 Q1 PLANT SCIENCES
Nadeem Bhanbhro, Hong-Jin Wang, Qadir Bakhsh, Mian Fazli Basit, Wangting Song, Uzair Ullah, Shengdixin Shi, Shan Gao, Abdullah Shalmani, Rui-Xiang Zhang, Kun-Ming Chen
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Abstract

Drought stress is a major constraint to global agricultural productivity, particularly for wheat (Triticum aestivum L.), a staple crop critical for food security. Climate change has exacerbated the frequency and severity of drought events, causing significant yield losses (Berauer et al. 2024). Approximately 20 million hectares of wheat crops are routinely exposed to drought, underscoring the urgent need for drought-resilient varieties (Coughlan de Perez et al. 2023). Plants respond to drought through complex physiological and molecular mechanisms, including the regulation of reactive oxygen species (ROS) and the formation of aerenchyma-specialized tissues with intercellular air spaces that enhance oxygen diffusion and stress tolerance (Bhanbhro et al. 2020; Ali and Muday 2024). SnRK2s (Sucrose Non-fermenting 1-Related Protein Kinases) are involved in ABA responses and contribute to important agronomic traits, such as grain yield in crops and enhance the adaptation of horticultural crops to drought and other abiotic stresses, partially through the reduction in ROS levels (Zhang et al. 2022, 2023). However, their interaction with catalase, one of an important ROS-scavenging enzymes, remain incompletely characterized, representing a critical gap in plant stress response mechanisms. Here, we demonstrate that TaSnRK2.1-2D enhances drought tolerance and agronomic performance in wheat by promoting aerenchyma formation, and interacting with catalase (TaCAT-1A) to modulate ROS scavenging.

TaSnRK2.1-2D通过调控小麦活性氧产生参与抗旱性研究
干旱胁迫是全球农业生产力的主要制约因素,特别是小麦(Triticum aestivum L.),这是一种对粮食安全至关重要的主要作物。气候变化加剧了干旱事件发生的频率和严重程度,造成了重大的产量损失(Berauer et al. 2024)。大约2000万公顷的小麦作物经常遭受干旱,这凸显了对抗旱品种的迫切需求(Coughlan de Perez et al. 2023)。植物通过复杂的生理和分子机制对干旱做出反应,包括活性氧(ROS)的调节和带有细胞间空气空间的通气组织的形成,从而增强氧气扩散和抗逆性(Bhanbhro et al. 2020;阿里和星期一2024)。SnRK2s(蔗糖非发酵1相关蛋白激酶)参与ABA响应,并有助于重要的农艺性状,如作物的粮食产量,增强园艺作物对干旱和其他非生物胁迫的适应性,部分通过降低ROS水平(Zhang等,2022,2023)。然而,它们与过氧化氢酶(一种重要的活性氧清除酶)的相互作用仍不完全清楚,这代表了植物逆境响应机制的关键空白。在这里,我们证明了TaSnRK2.1-2D通过促进通气组织的形成,并与过氧化氢酶(TaCAT-1A)相互作用来调节活性氧清除,从而提高小麦的耐旱性和农艺性能。
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来源期刊
Plant, Cell & Environment
Plant, Cell & Environment 生物-植物科学
CiteScore
13.30
自引率
4.10%
发文量
253
审稿时长
1.8 months
期刊介绍: Plant, Cell & Environment is a premier plant science journal, offering valuable insights into plant responses to their environment. Committed to publishing high-quality theoretical and experimental research, the journal covers a broad spectrum of factors, spanning from molecular to community levels. Researchers exploring various aspects of plant biology, physiology, and ecology contribute to the journal's comprehensive understanding of plant-environment interactions.
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