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To investigate the effects of low-pH stress on mineral nutrition absorption and transport in peanut,the peanut cultivar Yuanza9307 was utilized as material and a hydroponic culture system was employed in this study to analyze the growth phenotypes,nutrient accumulation,and transport efficiency under different pH conditions(pH 3.0-6.0).Based on the transcriptomic data,genes involved in nutrient absorption and transport responsive to low-pH stress(pH 3.5 vs.pH 6.0) were identified,and the expression levels and tissue-specific expression patterns of the candidate genes were further analyzed.The results showed that low-pH stress significantly inhibited the growth and development of peanut,leading to markedly reduced absorption of nitrogen,phosphorus,potassium,calcium,magnesium,manganese,zinc,and boron,as well as decreased transport efficiency of copper,calcium,and boron to the shoots.Under extreme low-pH conditions(pH 3.0),the transport efficiency of phosphorus and magnesium was relatively enhanced,while manganese transport exhibited a pH-dependent accumulation pattern.At the molecular level,low-pH stress induced widespread down-regulation of genes associated with the absorption and transport of nitrogen,phosphorus,potassium,boron,and other metal ions.Among these,the root-and root tip-specifically expressed genes AH03 G00930/AH13 G02820(AhNRT2;4 s),AH13 G53580(AhHAK5),AH09 G00730/AH08 G06010(AhRAMP6) and AH09 G33130(AhNIP5;1) were identified as key candidate genes regulating nutrient absorption under low-pH stress.It is revealed in this study that low-pH stress disrupts peanut growth and mineral homeostasis through coordinated inhibition of root development,differential regulation of element transport systems,and dynamic regulation of gene expression.These findings provide a theoretical foundation and genetic resources for breeding of acid-tolerant peanut cultivars.
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Basic Information:
DOI：10.14001/j.issn.1002-4093.2026.03.007
China Classification Code:S565.2
Citation Information:
[1]LIU Ling,ZHANG Xiang,SUO Yanyan ,et al.Effects of Low-pH Stress on Mineral Nutrition Absorption and Transport in Peanut[J].Journal of Peanut Science().DOI:10.14001/j.issn.1002-4093.2026.03.007.
Fund Information:
国家花生产业技术体系养分管理岗位(CARS-13); 河南省花生产业技术体系(HARS-22-05-G2); 河南省重点研发专项(241111114400); 河南省科技攻关项目(242102110174); 河南省农科院优秀创新团队项目(2024TD10)
2026-04-14
2026-04-14
2026-04-14