Gene Expression, Hormone Signaling, and Nutrient Uptake in the Root Regermination of Grafted Watermelon Plants with Different Pumpkin Rootstocks
文献类型： 外文期刊
作者： Zhang, Jian 1 ; Zhang, Huijun 3 ; Wang, Pengcheng 1 ; Chen, Jing 1 ; Cao, Yu 1 ;
作者机构： 1.Anhui Acad Agr Sci, Inst Hort, Hefei 230031, Anhui, Peoples R China
2.Key Lab Intelligent Seedling Breeding Vegetable F, Maanshan 238200, Anhui, Peoples R China
3.Huaibei Normal Univ, Sch Life Sci, Huaibei 235000, Anhui, Peoples R China
4.Anhui Agr Univ, Sch Hort, Hefei 230036, Anhui, Peoples R China
关键词： Citrullus lanatus; Gene profiling; Grafting technique; Pumpkin cultivar; Root development
期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.64； 五年影响因子：4.469 ）
ISSN： 0721-7595
年卷期：
页码：
收录情况： SCI
摘要： Roots play a crucial role in plant growth by absorbing various nutrients from soils. However, the gene expression in the lateral root regermination of pumpkin rootstocks by double-root-cutting grafting remains unclear. In this study, transcriptome sequencing was performed to analyze the nutrient uptake, hormones, and differentially expressed genes (DEGs) during the lateral root formation of rootstocks (F5, F1, and DM) after grafting with watermelon. Results showed that the ability of root regermination varied in the three rootstocks. F1 had the highest root length, whereas DM had the shortest roots after cutting the main roots, suggesting that F1 had the best capacity to form lateral roots. An increased trend of nutrient uptake (N, Mg2+, and K) was observed. However, the P content decreased after root cutting in the three rootstocks. Meanwhile, grafted watermelon plants exhibited different abilities to adsorb nutrient elements with the three rootstocks. Three hormones (indole acetic acid, salicylic acid, and jasmonic acid) were involved in root development, and the highest amounts of salicylic acid were observed. The most significant metabolic pathways involved the mechanisms of signal transduction, secondary metabolite biosynthesis, carbohydrate transport, and cell wall biogenesis. DEGs were also related to the functions of the membrane and response to organic substances, chitin, and wounding. Our results provide a new understanding of root regermination and elucidate a potential gene expression for the regulation and improvement of the root system in grafted plants with pumpkin rootstocks.
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