文献类型： 外文期刊

作者： Cheema, Hafsa Nazir ¹ ; Wang, Ke-Xiu ³ ; Ma, Haiyan ¹ ; Tang, Mingxia ³ ; Saba, Tahseen ⁴ ; Hu, Tingyuan ¹ ; Jahandad, Ambreen ⁵ ; Fang, Xiaoting ¹ ; Zhang, Kaiqin ¹ ; Ansar, Muhammad ⁵ ; He, Wei ³ ; Zheng, Shunlin ¹ ;

作者机构： 1.Sichuan Agr Univ, Coll Agron, State Key Lab Crop Gene Explorat & Utilizat Southw, Chengdu 611130, Peoples R China

2.Crop Ecophysiol & Cultivat Key Lab Sichuan Prov, Chengdu 611130, Peoples R China

3.Sichuan Acad Agr Sci, Crop Res Inst, Sichuan Key Lab Green Germplasm Innovat & Genet Im, Chengdu 610066, Sichuan, Peoples R China

4.Sichuan Agr Univ, Coll Forestry, Key Lab Ecol Forestry Engn Sichuan Prov, Chengdu 611130, Peoples R China

5.PMAS Arid Agr Univ Rawalpindi, Dept Agron, Rawalpindi, Pakistan

6.Chengdu Joyson Agr Technol Co Ltd, Minist Agr, Key Lab Tuber Crop Genet & Breeding, Xindu 610500, Peoples R China

关键词： PASP-Ca; Potato genotypes; Nitrogen use efficiency; Root system architecture; Molecular profiling

期刊名称：PLANT AND SOIL （ 影响因子：4.9； 五年影响因子：5.2 ）

ISSN： 0032-079X

年卷期： 2024 年

页码：

收录情况： SCI

摘要： BackgroundPolyaspartic Acid-Calcium (PASP-Ca) is a versatile and eco-friendly amino acid complex, primarily recognized for bolstering nitrogen use efficiency and crop productivity. However, the core significance of this complex remains enigmatic in potato crop. We hypothesized that simultaneous application of PASP-Ca with potato genotypes characterized by substantial root systems and high genetic potentials for nitrogen-use efficiency (NUE) would best address this knowledge gap.MethodsThe synergistic effect of various PASP-Ca treatments on morph physiological, N-related, and enzymatic parameters coupled with their transcript levels (shoot and root) in four potato genotypes having contrasting NUEs under low and high N supplies in aeroponics.ResultsPASP-Ca markedly boosted plant growth, yield components, and photosynthetic efficiency, with pronounced effects observed in nitrogen-efficient genotypes, especially Qingshu-9, emphasizing the importance of genotype selection in optimizing nitrogen utilization. Moreover, PASP-Ca treatments, particularly LN-P100 significantly enhances root system architecture (RSA), contributing to expanded root dimensions and improved nutrient acquisition capacity, especially under nitrogen-deficient conditions. Carbohydrate metabolism in potato tubers benefits from PASP-Ca treatment, leading to increased starch content, thereby impacting tuber quality. Among the N-assimilating enzymes, a large genotypic variation was observed for glutamine synthetase (GS), which may be considered a potential trait for improving NUE. Molecular analysis further elucidated the underlying mechanisms, demonstrating the upregulation of essential genes involved in nitrogen metabolism.ConclusionsThe potential efficacy of PASP-Ca synergist as a novel accelerant for enhancing potato crop growth, biomass production, and nitrogen utilization efficiency, all coalescing seamlessly with the ethos of sustainable agricultural practices.