Chan-In Phukjira, Jamjod Sansanee, Prom-U-Thai Chanakan, Rerkasem Benjavan, Russell Joanne, Pusadee Tonapha
Plant Genetic Resource and Nutrition Lab (CMUPNLab), Division of Agronomy, Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand.
Lanna Rice Research Center, Chiang Mai University, Chiang Mai 50200, Thailand.
Plants (Basel). 2024 May 12;13(10):1336. doi: 10.3390/plants13101336.
Silicon (Si) is a beneficial nutrient that has been shown to increase rice productivity and grain quality. Fragrant rice occupies the high end of the rice market with prices at twice to more than three times those of non-fragrant rice. Thus, this study evaluated the effects of increasing Si on the yield and quality of fragrant rice. Also measured were the content of proline and the expression of the genes associated with 2AP synthesis and Si transport. The fragrant rice varieties were found to differ markedly in the effect of Si on their quality, as measured by the grain 2AP concentration, while there were only slight differences in their yield response to Si. The varieties with low 2AP when the Si supply is limited are represented by either PTT1 or BNM4 with only slight increases in 2AP when Si was increased. Si affects the gene expression levels of the genes associated with 2AP synthesis, and the accumulation of 2AP in fragrant rice mainly occurred through the upregulation of , , , , and genes. The findings suggest that Si is a potential micronutrient that can be utilized for improving 2AP and grain yield in further aromatic rice breeding programs.
硅（Si）是一种有益养分，已被证明能提高水稻产量和品质。香米占据大米市场高端，价格是非香米的两倍至三倍多。因此，本研究评估了增加硅对香米产量和品质的影响。还测定了脯氨酸含量以及与2-乙酰基-1-吡咯啉（2AP）合成和硅转运相关基因的表达。结果发现，以籽粒2AP浓度衡量，香米品种对硅的品质效应差异显著，而它们对硅的产量响应差异较小。当硅供应有限时，2AP含量低的品种以PTT1或BNM4为代表，增加硅时2AP仅略有增加。硅影响与2AP合成相关基因的表达水平，香米中2AP的积累主要通过上调、、、和基因实现。研究结果表明，硅是一种潜在的微量营养素，可用于进一步的香稻育种计划中提高2AP含量和籽粒产量。
