基于转录组学解析节旋藻调控拟南芥生长的分子机制

打开文本图片集

中图分类号：S142.5：Q945.3 文献标识号：A 文章编号：1001-4942（2025）07-0001-09

AbstractThe regulatory role of Arthrospira platensis（AP），one of biofertilizers，in promoting plant growth remains elusive. This study focused on the model plant Arabidopsis thaliana，using a combination of physiological assessment and transcriptomic analysis to investigate the influence of diferent concentrations of AP on plant growth and transcriptome.The results revealed that the promotion of AP on plant growth was dosage dependent. Compared with the control group， the fresh weight of leaves increased by 44% ，the diameter of rosette leaves increased by 38% ，and the number of lateral roots increased by 20% when 6mg of AP per 100 （20 cm2 was applied for Arabidopsis.However，the growth of the main and lateral roots was significantly inhibited by applying 24mg of AP per 100cm2 for Arabidopsis. The length of the main and lateral roots both decreased by 50% ，but the length of the root hairs increased by 122% . Transcriptomic analysis indicated that lower concentration of AP might enhance plant growth by modulating the expresion of genes required for cell wall synthesis and modification.In contrast，higher concentration of AP might inhibit plant growth through influencing various plant hormone signaling pathways and absorbing inorganic salt ions from the culture medium.These results could not only provide a foundational understanding of interaction between algae and plants，but also benefit the sustainable utilization of Arthrospira in agriculture.

KeyWordsArabidopsis thaliana； Arthrospira platensis ； Transcriptomic analysis； Molecular mechanism;Biofertilizer

农业生产与土壤肥力密切相关，传统化肥的广泛使用虽极大提升了作物产量，但同时也导致土壤中氮和磷的异常积累，严重扰乱生态系统平衡，破坏生物多样性，不利于农业的高质量可持续发展[1-2]。（剩余15154字）