Exploring the effect of high-temperature on japonica rice yield by transcriptomics

文献类型： 外文期刊

第一作者： Li, Zhong

作者： Li, Zhong;Wu, Huayu;Hassan, Muhammad Ahmad;Tu, Debao;Wu, Huayu;Jiang, Yang

作者机构：

关键词： Japonica rice; High temperature; Yield; Grain filling; Sowing date

期刊名称：PLANT GROWTH REGULATION （ 影响因子：3.9； 五年影响因子：3.8 ）

ISSN： 0167-6903

年卷期： 2024 年 104 卷 2 期

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收录情况： SCI

摘要： High temperature is one of the most critical abiotic factors affecting rice growth and development, and the frequent occurrence of extremely high temperatures has severely constrained rice production in China. Therefore, it is crucial to investigate how to overcome the damage caused by heat stress on rice. This study used japonica rice lines, J565 and NJ9108, as plant material. The physiological and transcriptional mechanisms of rice crops under high-temperature stress and different sowing dates (i.e., early sowing on April 25, 2018 and late sowing on May 25, 2018) were studied in this research investigation. The research results indicated that elevated temperatures significantly inhibited carbon (C) and nitrogen (N) transport in leaves and stem sheaths, which is not conducive to grain filling, leading to reduced yield. The high-temperature tolerance of rice has resulted from intricate and complex biochemical processes that involve several gene coding and metabolic expressions. The result of transcriptomic analysis showed that there were 681 and 472 differential expression genes (DEGs) were engaged in two treatments (HJ565 VS LJ565 and HN9108 VS LN9108; HJ565 VS HN9108 and LN565 VS LN9108). The enrichment analysis of HJ565 VS LJ565 and HN9108 VS LN9108 showed that the top ten enrichment pathways were significantly enriched (p < 0.05); however, the top ten enrichment pathways enriched in HJ565 VS HN9108 and LN565 VS LN9108 were not significantly enriched (p > 0.05). This study confirmed that high temperature caused the up-regulated expression of heat shock factor-related genes (HSF) and mediated the up-regulated expression of downstream protein folding and heat response genes. The changing trend of these genes in NJ9108 was significantly greater than that in J565 under two sowing periods, indicating that NJ9108 was susceptible to high temperatures. It explains how the high-temperature tolerance capacity of J565 helped attain a higher yield than that of NJ9108 under heat stress. The findings of this study provided an important theoretical basis for in-depth research and understanding of the molecular mechanism and regulatory network of high-temperature tolerance and quality formation in rice.

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