Li Shichen, Jiang Tao, Ahmed Waqar, Yang Yingfen, Yang Linyuan, Zhang Tao, Mei Fupeng, Alharbi Sulaiman Ali, Shan Qu, Guo Cuilian, Zhao Zhengxiong
Yunnan Agricultural University, Kunming, Yunnan, China.
Department of Botany & Microbiology College of Science, King Saud University, Riyadh, Saudi Arabia.
Front Plant Sci. 2024 Jul 1;15:1377364. doi: 10.3389/fpls.2024.1377364. eCollection 2024.
Nitrogen (N) distribution in plants is intricately linked to key physiological functions, including respiration, photosynthesis, structural development, and nitrogen storage. However, the specific effects of different N morphologies on N accumulation and plant growth are poorly understood. Our research specifically focused on determining how different N morphologies affect N absorption and biomass accumulation.
This study elucidated the impact of different application rates (CK: 0 g N/plant; T1: 4 g N/plant; T2: 8 g N/plant) of N fertilizer on N and biomass accumulation in tobacco cultivars Hongda and K326 at different growth stages.
Our findings emphasize the critical role of N distribution in various plant parts, including leaves, stems, and roots, in determining the complex mechanisms of N and biomass accumulation in tobacco. We found that in relation to total N, a greater ratio of water-soluble N ( ) in leaves facilitated N accumulation in leaves. In contrast, an increased ratio of SDS (detergent)-insoluble N ( ) in leaves and non-protein N ( ) in roots hindered this increase. Additionally, our results indicate that a greater proportion of in leaves has a negative impact on biomass accumulation in leaves. Furthermore, elevated levels of , , and in roots, and in leaves adversely affected biomass accumulation in tobacco leaves. The Hongda cultivar exhibited greater biomass and N accumulation abilities as compared to K326.
Our findings highlight the significant role of distribution of N morphologies on plant growth, as well as N and biomass accumulation in tobacco plants. Understanding N distribution allows farmers to optimize N application, minimizing environmental losses and maximizing yield for specific cultivars. These insights advance sustainable agriculture by promoting efficient resource use and reducing environmental impact.
植物中的氮（N）分布与关键生理功能密切相关，包括呼吸作用、光合作用、结构发育和氮储存。然而，不同氮形态对氮积累和植物生长的具体影响尚不清楚。我们的研究特别关注确定不同氮形态如何影响氮吸收和生物量积累。
本研究阐明了不同施氮量（对照：0克氮/株；T1：4克氮/株；T2：8克氮/株）对不同生长阶段烟草品种宏达和K326中氮和生物量积累的影响。
我们的研究结果强调了氮在植物各部分（包括叶、茎和根）中的分布在决定烟草中氮和生物量积累的复杂机制方面的关键作用。我们发现，相对于总氮，叶片中水溶性氮（ ）的比例较高有助于叶片中的氮积累。相反，叶片中SDS（去污剂）不溶性氮（ ）和根中非蛋白氮（ ）的比例增加阻碍了这种增加。此外，我们的结果表明，叶片中较高比例的 对叶片生物量积累有负面影响。此外，根中 、 和 水平的升高以及叶片中 的升高对烟草叶片生物量积累产生不利影响。与K326相比，宏达品种表现出更大的生物量和氮积累能力。
我们的研究结果突出了氮形态分布对植物生长以及烟草植株中氮和生物量积累的重要作用。了解氮分布使农民能够优化氮肥施用，将环境损失降至最低，并使特定品种的产量最大化。这些见解通过促进资源有效利用和减少环境影响推动了可持续农业的发展。
