Department of Crop Science, Chungbuk National University, Cheong-ju 28644, Korea.
Department of Biology, Chungbuk National University, Cheong-ju 28644, Korea.
Biomolecules. 2022 Jun 9;12(6):811. doi: 10.3390/biom12060811.
Higher plants in terrestrial environments face to numerous unpredictable environmental challenges, which lead to a significant impact on plant growth and development. In particular, the climate change caused by global warming is causing drought stress and rapid desertification in agricultural fields. Many scientific advances have been achieved to solve these problems for agricultural and plant ecosystems. In this review, we handled recent advances in our understanding of the physiological changes and strategies for plants undergoing drought stress. The activation of ABA synthesis and signaling pathways by drought stress regulates root development via the formation of complicated signaling networks with auxin, cytokinin, and ethylene signaling. An abundance of intrinsic soluble sugar, especially trehalose-6-phosphate, promotes the SnRK-mediated stress-resistance mechanism. Suberin deposition in the root endodermis is a physical barrier that regulates the influx/efflux of water and nutrients through complex hormonal and metabolic networks, and suberization is essential for drought-stressed plants to survive. It is highly anticipated that this work will contribute to the reproduction and productivity improvements of drought-resistant crops in the future.
陆生高等植物面临着无数不可预测的环境挑战，这对植物的生长和发育产生了重大影响。特别是，全球变暖导致的气候变化正在使农业领域出现干旱胁迫和快速沙漠化。为了解决这些问题，农业和植物生态系统已经取得了许多科学进展。在这篇综述中，我们介绍了对植物在干旱胁迫下的生理变化和策略的最新理解。ABA 合成和信号途径的激活通过与生长素、细胞分裂素和乙烯信号的复杂信号网络的形成来调节根的发育。大量的内在可溶性糖，特别是海藻糖-6-磷酸，促进了 SnRK 介导的抗应激机制。在根内皮层中，蜡质的沉积是一种物理屏障，通过复杂的激素和代谢网络调节水和养分的流入/流出，并且蜡质化对于耐旱植物的生存至关重要。这项工作有望为未来耐旱作物的繁殖和生产力提高做出贡献。
