Endophytic bacterium Sphingomonas panaciterrae NB5 influences soil properties and improves growth, nutrient contents, and yield of red amaranth (Amaranthus tricolor L.)

IF 5.4 Q1 PLANT SCIENCES
Razia Sultana , Shah Mohammad Naimul Islam , Sourav Biswas Shuvo , Gazi Md. Adnan Ehsan , Prinon Saha , Md. Mustafijur Rahman Khan , Nishat Rumman
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Abstract

Plant growth promoting rhizobacteria (PGPR) are crucial for enhancing plant growth and restoring soil health. Despite the excellent plant growth promoting traits, information is limited on the efficacy of Sphingomonas as a PGPR, especially in vegetable crops. In this study, we used Sphingomonas panaciterrae NB5 as a biofertilizer in leafy vegetable red amaranth in three methods: seed priming (SP), root drenching + foliar (RD + FA), and bacterial culture filtrate (BCF) foliar application. Bio-inoculation of NB5 significantly increased the plant height, number of leaves, leaf area, stem girth, total chlorophyll, vitamin C, and antioxidant contents of red amaranth in all methods of application. Bacterial treatment resulted in notable alterations to the root structure, consisting of the formation of secondary, tertiary, and fibrous roots, particularly in the BCF foliar application and RD + FA treatment.The fresh and dry biomass significantly increased both in root and shoot, resulting in improved yield. The nutritional profile revealed that bacterial application significantly increased the nitrogen, potassium, magnesium, iron, and zinc content, with a slight increase in phosphorus content, in shoots and roots in all the methods of bacterial application compared to control. In post-harvest soil, NB5 boosted total nitrogen, available phosphorus, calcium, and sulfur, as well as soil organic carbon (SOM) and total bacterial populations, regardless of the application methods. The RD+FA treatment outperformed the other methods of application in most of the plant and soil parameters, and the next was the BCF foliar application. Multivariate analysis also confirmed the better performance of RD+ FA and BCF foliar applications. Therefore, simultaneous application of NB5 through root drenching and foliar application could be recommended to the farmers for increasing the yield of red amaranth with improved nutrients and restoring soil health and productivity.

内生细菌 Sphingomonas panaciterrae NB5 影响土壤性质并改善红苋菜(Amaranthus tricolor L.)的生长、养分含量和产量
植物生长促进根瘤菌(PGPR)对促进植物生长和恢复土壤健康至关重要。尽管鞘氨单胞菌具有优异的植物生长促进特性,但有关其作为植物生长促进根瘤菌(PGPR)功效的信息却很有限,尤其是在蔬菜作物中。在本研究中,我们将 Sphingomonas panaciterrae NB5 用作叶菜类作物红苋菜的生物肥料,使用了三种方法:种子处理(SP)、根部淋水+叶面喷施(RD + FA)和细菌培养滤液(BCF)叶面喷施。在所有施用方法中,NB5 的生物接种都能显著增加红苋菜的株高、叶片数、叶面积、茎围、叶绿素总量、维生素 C 和抗氧化剂含量。细菌处理显著改变了根部结构,包括形成次生根、三级根和须根,尤其是在 BCF 叶面施肥和 RD + FA 处理中。营养成分分析表明,与对照组相比,所有施菌方法的芽和根中的氮、钾、镁、铁和锌含量都明显增加,磷含量略有增加。在收获后的土壤中,无论采用哪种施用方法,NB5 都能提高总氮、可利用磷、钙、硫以及土壤有机碳(SOM)和细菌总数。在大多数植物和土壤参数方面,RD+FA 处理优于其他施肥方法,其次是 BCF 叶面施肥。多变量分析也证实了 RD+FA 和 BCF 叶面喷施的效果更好。因此,建议农民通过根部淋施和叶面喷施同时施用 NB5,以提高红苋菜的产量,改善营养状况,恢复土壤健康和生产力。
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来源期刊
Current Plant Biology
Current Plant Biology Agricultural and Biological Sciences-Plant Science
CiteScore
10.90
自引率
1.90%
发文量
32
审稿时长
50 days
期刊介绍: Current Plant Biology aims to acknowledge and encourage interdisciplinary research in fundamental plant sciences with scope to address crop improvement, biodiversity, nutrition and human health. It publishes review articles, original research papers, method papers and short articles in plant research fields, such as systems biology, cell biology, genetics, epigenetics, mathematical modeling, signal transduction, plant-microbe interactions, synthetic biology, developmental biology, biochemistry, molecular biology, physiology, biotechnologies, bioinformatics and plant genomic resources.
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