Silicon Improves the Plant Growth and Fruit Quality of Cherry Tomato (Solanum lycopersicum var. cerasiforme) under Nitrogen Imbalance by Modulating Nitrogen Assimilation and Photosynthesis
Fei Lei, Xiaozhong Pan, Huiru Lin, Zhijun Zhang, Wen Zhang, Hao Tan, Mei Yang, Hailin Liu
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引用次数: 0
Abstract
Silicon (Si) is typically considered a nonessential but beneficial element for most plants, and it can alleviate nutrient imbalance stress in crops. However, few studies have investigated the impact of Si application on the growth and fruit quality of cherry tomatoes, leading uncertainty regarding whether Si application can improve cherry tomato yields and quality under N imbalance. In this study, we performed a pot experiment with cherry tomato plants, and used two N fertilizer inputs (high N level, 0.40 g N kg− 1 soil; low N level, 0.20 g N kg− 1 soil) with or without Si application, to investigate the influence of Si application on plant growth, photosynthesis, leaf N metabolic enzyme activities, and fruit quality in cherry tomatoes under N imbalance. This study aimed to assess the promotive effects of Si application on the growth and fruit quality of cherry tomatoes under nitrogen (N) imbalance. The results showed that Si application enhanced dry matter accumulation and photosynthesis, regardless of the N conditions. Compared with treatment without Si application, the total dry matter accumulation, net photosynthetic rate, stomatal conductance, and transpiration rate were enhanced by 2.59%, 3.76%, 23.9%, and 17.1% under low N conditions, and by 7.50%, 26.2%, 49.1%, and 26.3% under high N conditions, respectively. Furthermore, Si regulated the activities of leaf N metabolic enzymes, increasing the N content of the plant under low N conditions and decreasing it under high N conditions. Si application improved fruit quality, as the vitamin C content and firmness were increased by 13.2% and 3.57% under low N conditions and by 7.09% and 17.4% under high N conditions, respectively. This study provides evidence regarding Si application as a beneficial strategy for cherry tomato production, highlighting its potential role in optimizing plant responses to varying N levels.
硅通过调节氮同化和光合作用改善氮失衡条件下樱桃番茄(Solanum lycopersicum var.
硅(Si)通常被认为是大多数植物非必需但有益的元素,它可以缓解作物养分失衡的压力。然而,很少有研究调查施硅对樱桃番茄的生长和果实品质的影响,因此施硅是否能在氮失衡的情况下提高樱桃番茄的产量和品质尚不确定。本研究以樱桃番茄植株为对象,采用两种氮肥(高氮肥水平,0.40 g N kg- 1 土壤;低氮肥水平,0.20 g N kg- 1 土壤)施用或不施用 Si 的盆栽试验,研究氮失衡条件下施用 Si 对樱桃番茄植株生长、光合作用、叶片氮代谢酶活性和果实品质的影响。本研究旨在评估施硅对氮失衡条件下樱桃番茄的生长和果实品质的促进作用。结果表明,无论氮素条件如何,施硅都能促进干物质积累和光合作用。与不施用 Si 的处理相比,在低氮条件下,总干物质积累、净光合速率、气孔导度和蒸腾速率分别提高了 2.59%、3.76%、23.9% 和 17.1%;在高氮条件下,分别提高了 7.50%、26.2%、49.1% 和 26.3%。此外,硅还能调节叶片氮代谢酶的活性,在低氮条件下提高植物的氮含量,而在高氮条件下则降低氮含量。施硅能改善果实品质,在低氮条件下,维生素 C 含量和坚硬度分别提高了 13.2% 和 3.57%,在高氮条件下,分别提高了 7.09% 和 17.4%。这项研究提供了施用硅对樱桃番茄生产有益的证据,突出了硅在优化植物对不同氮水平的反应方面的潜在作用。
期刊介绍:
The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science.
Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration.
Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies.
Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome.
The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.