Antala Michal, Kovar Marek, Sporinová Lucia, Filacek Andrej, Juszczak Radosław, Zivcak Marek, Shomali Aida, Prasad Raghavendra, Brestic Marian, Rastogi Anshu
Laboratory of Bioclimatology, Department of Ecology and Environmental Protection, Faculty of Environmental Engineering and Mechanical Engineering, Poznan University of Life Sciences, Piątkowska 94, Poznań, 60-649, Poland.
Department of Plant Physiology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, A. Hlinku 2, Nitra, 949 76, Slovak Republic.
BMC Plant Biol. 2025 Apr 8;25(1):444. doi: 10.1186/s12870-025-06429-6.
As global agriculture faces the challenge of climate change, characterized by longer and more severe drought episodes, there is an increasing need for crop diversification and improved plant breeding. Buckwheat is one of the climate-resilient candidates for future important crops with remarkable adaptability to various biotic and abiotic stresses. As an underbred crop, a large number of genotypes should be assessed for the breeding of superior plants. Therefore, this study investigates the response of various buckwheat genotypes to water stress by high-throughput phenotyping and auxiliary plant physiology measurements.
We assessed six buckwheat genotypes from different regions under mild and severe water stress, focusing on morphological and physiological changes to understand drought tolerance mechanisms. Our findings revealed that reallocation of assimilated carbon from growth to secondary metabolite production is a common response to drought stress. Among the genotypes tested, Panda emerged as the most drought-resistant, with its morphology remaining the most stable under mild water stress and its ability to rapidly accumulate protective pigments in response to drought. Silver Hull also demonstrated resilience, maintaining its aboveground biomass under mild water stress at levels comparable to the control group. Additionally, the response magnitude to drought stress was linked to the biomass production potential of the genotypes, which was higher for those from warmer regions (Bhutan, Zimbabwe) and lower for those from colder regions (Poland, Canada).
The diversity in genotypic responses highlights the significant role of genetic variability in shaping drought resistance strategies in buckwheat. This research not only enhances our understanding of buckwheat's physiological responses to water stress but also holds promise for developing drought-resistant buckwheat varieties. These advancements are crucial for promoting sustainable agriculture in the face of climate change.
随着全球农业面临气候变化的挑战，其特点是干旱期更长且更严重，对作物多样化和改良植物育种的需求日益增加。荞麦是未来重要作物中具有气候适应能力的候选作物之一，对各种生物和非生物胁迫具有显著的适应性。作为一种未充分培育的作物，需要评估大量基因型以培育优良植株。因此，本研究通过高通量表型分析和辅助植物生理学测量来研究各种荞麦基因型对水分胁迫的响应。
我们评估了来自不同地区的六种荞麦基因型在轻度和重度水分胁迫下的情况，重点关注形态和生理变化以了解耐旱机制。我们的研究结果表明，同化碳从生长重新分配到次生代谢产物生产是对干旱胁迫的常见反应。在测试的基因型中，熊猫表现出最强的抗旱性，在轻度水分胁迫下其形态保持最稳定，并且能够在干旱时迅速积累保护性色素。银壳也表现出韧性，在轻度水分胁迫下其地上生物量保持在与对照组相当的水平。此外，对干旱胁迫的响应程度与基因型的生物量生产潜力相关，来自较温暖地区（不丹、津巴布韦）的基因型生物量生产潜力较高，而来自较寒冷地区（波兰、加拿大）的基因型生物量生产潜力较低。
基因型反应的多样性突出了遗传变异性在塑造荞麦抗旱策略中的重要作用。这项研究不仅增进了我们对荞麦对水分胁迫生理反应的理解，也为培育抗旱荞麦品种带来了希望。这些进展对于在气候变化面前促进可持续农业至关重要。
