Gonzales Clarice F, Kelley Dior R
Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011, USA.
J Exp Bot. 2025 May 10;76(7):1879-1887. doi: 10.1093/jxb/eraf079.
Plants display a continuum of responses to abiotic stresses, including sensitivity and tolerance. Classical phytohormones have been implicated in these processes due to the observed changes in growth phenotypes following stress cues. This interplay is often described as the growth-stress trade-off. Recent studies have examined abiotic stress responses in maize and implicated auxin biosynthesis, transport, and signaling. However, very few auxin pathway genes have been functionally characterized for their role in stress responses in maize, leaving a large knowledge gap in the field. In this review we will describe our current understanding of relationships between auxin and a myriad of stresses, including temperature, drought, salinity, light, and heavy metals. Resilience to environmental stresses is critical for informing agricultural strategies to improve maize yield and quality. We conclude with a discussion of possible future directions and approaches that may increase our understanding of how auxin mediates growth-stress trade-offs in maize.
植物对非生物胁迫表现出一系列连续的反应，包括敏感性和耐受性。由于在胁迫信号后观察到生长表型的变化，经典植物激素已被认为参与了这些过程。这种相互作用通常被描述为生长-胁迫权衡。最近的研究已经研究了玉米中的非生物胁迫反应，并涉及生长素的生物合成、运输和信号传导。然而，在玉米中，很少有生长素途径基因因其在胁迫反应中的作用而得到功能表征，这在该领域留下了很大的知识空白。在这篇综述中，我们将描述我们目前对生长素与多种胁迫（包括温度、干旱、盐度、光照和重金属）之间关系的理解。对环境胁迫的适应能力对于制定提高玉米产量和质量的农业策略至关重要。我们最后讨论了可能的未来方向和方法，这些方向和方法可能会增加我们对生长素如何介导玉米生长-胁迫权衡的理解。
