Genetic variation in Arabidopsis thaliana reveals the existence of natural heat resilience factors for meiosis

IF 6.5 1区 生物学 Q1 PLANT SCIENCES Plant Physiology Pub Date : 2024-12-23 DOI:10.1093/plphys/kiae671
Jiayi Zhao, Huiqi Fu, Zhengze Wang, Min Zhang, Yaoqiong Liang, Xueying Cui, Wenjing Pan, Ziming Ren, Zhihua Wu, Yujie Zhang, Xin Gui, Li Huo, Xiaoning Lei, Chong Wang, Arp Schnittger, Wojciech P Pawlowski, Bing Liu
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引用次数: 0

Abstract

Heat interferes with multiple meiotic processes, leading to genome instability and sterility in flowering plants, including many crops. Despite its importance for food security, the mechanisms underlying heat tolerance of meiosis are poorly understood. In this study, we analyzed different meiotic processes in the Arabidopsis (Arabidopsis thaliana) accessions Columbia (Col) and Landsberg erecta (Ler), their F1 hybrids, and the F2 offspring under heat stress (37°C). At 37°C, Col exhibits significantly reduced formation of double-strand breaks (DSBs) and completely abolished homolog pairing, synapsis, and crossover (CO) formation. Strikingly, Ler and Col/Ler hybrids exhibit normal CO formation and show mildly impacted homolog pairing and synapsis. Interestingly, only 10% ∼ 20% of F2 offspring behave as Ler, revealing that heat tolerance of meiotic recombination in Arabidopsis is genetically controlled by several loci. Moreover, F2 offspring show defects in chromosome morphology and integrity and sister-chromatid segregation, the levels of which exceed those in either inbreds and/or hybrids, thus implying a transgressive effect on heat tolerance of meiosis. Furthermore, correlation and cytogenetic analyses suggest that homolog pairing and/or synapsis have an impact on heat tolerance of chromosome morphology and stability at post-recombination stages. This study reveals natural heat resilience factors for meiosis in Arabidopsis, which have the great potential to be exploited in breeding programs.
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来源期刊
Plant Physiology
Plant Physiology 生物-植物科学
CiteScore
12.20
自引率
5.40%
发文量
535
审稿时长
2.3 months
期刊介绍: Plant Physiology® is a distinguished and highly respected journal with a rich history dating back to its establishment in 1926. It stands as a leading international publication in the field of plant biology, covering a comprehensive range of topics from the molecular and structural aspects of plant life to systems biology and ecophysiology. Recognized as the most highly cited journal in plant sciences, Plant Physiology® is a testament to its commitment to excellence and the dissemination of groundbreaking research. As the official publication of the American Society of Plant Biologists, Plant Physiology® upholds rigorous peer-review standards, ensuring that the scientific community receives the highest quality research. The journal releases 12 issues annually, providing a steady stream of new findings and insights to its readership.
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