Sphingomonas panaciterrae PB20 increases growth, photosynthetic pigments, antioxidants, and mineral nutrient contents in spinach (Spinacia oleracea L.)

Razia Sultana; Shah Mohammad Naimul Islam; Nurjahan Sriti; Mysha Ahmed; Sourav Biswas Shuvo; Md Habibur Rahman; Asif Iqbal Ibne Jashim

Heliyon (Feb 2024)

Sphingomonas panaciterrae PB20 increases growth, photosynthetic pigments, antioxidants, and mineral nutrient contents in spinach (Spinacia oleracea L.)

Razia Sultana,
Shah Mohammad Naimul Islam,
Nurjahan Sriti,
Mysha Ahmed,
Sourav Biswas Shuvo,
Md Habibur Rahman,
Asif Iqbal Ibne Jashim

Affiliations

Razia Sultana: Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh, Bangladesh; Corresponding author.
Shah Mohammad Naimul Islam: Institute of Biotechnology and Genetic Engineering, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh
Nurjahan Sriti: Bangladesh Agricultural University, Mymensingh, Bangladesh
Mysha Ahmed: Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh, Bangladesh
Sourav Biswas Shuvo: Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh, Bangladesh
Md Habibur Rahman: Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh, Bangladesh
Asif Iqbal Ibne Jashim: Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh, Bangladesh

Journal volume & issue: Vol. 10, no. 3
p. e25596

Abstract

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Plant growth promoting rhizobacteria (PGPR) have been intensively investigated in agricultural crops for decades. Nevertheless, little information is available on the application of Sphingomonas spp. as a PGPR particularly in vegetables, despite of potential plant growth promoting traits of this group. This study investigated the role of Sphingomonas panaciterrae (PB20) on growth and nutritional profile of spinach applied through seed priming (SP), soil drenching (SD), foliar application (FA), and bacterial culture filtrate foliar (BCF) applications. The results showed that, depending on different methods of application, PB20 significantly increased plant height (19.57–65.65 %), fresh weight (7.26–37.41 %), total chlorophyll (71.14–192.54 %), carotenoid (67.10–211.67 %) antioxidant (55.99–207.04), vitamin C (8.1–94.6 %) and protein content (6.7–21.5 %) compared to control in the edible part of spinach. Among the mineral nutrients, root nitrogen (N) showed greater response to bacterial application (18.65%–46.15 % increase over control) than shoot nitrogen (6.70%–21.52 % increased over control). Likewise, in all methods of application, phosphorus (P) content showed significant increase over control both in root (42.79–78.48 %) and in shoot (3.57–27.0 %). Seed priming and foliar application of PB20 increased the shoot calcium (Ca) content compared to control. BCF foliar application yielded maximum magnesium (Mg), iron (Fe) and zinc (Zn) in shoot. However, seed priming resulted in maximum Fe in root. Overall, seed priming outperformed in growth, vitamin C, antioxidants, N and P uptake, while BCF foliar application resulted in better uptake of several nutrients. Multivariate analysis validated the positive association of most of the growth parameters with SP while several nutrients with FA and BCF. Based on the findings it is evident that this rhizobacteria PB20 has the potentiality to be applied as a biofertilizer to produce nutrient-enriched spinach with an improved yield. Farmers can conveniently incorporate PR20 through seed priming before planting of spinach, with additional benefits through foliar spray.

Published in Heliyon

ISSN: 2405-8440 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Science: Science (General); Social Sciences: Social sciences (General)
Website: https://www.cell.com/heliyon/home

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