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Kokila V, Prasanna R, Kumar A, Nishanth S, Singh B, Gaur Rudra S, Pal P, Pal M, Shivay YS, Singh AK. Elevated CO 2 along with inoculation of cyanobacterial biofilm or its partners differentially modulates C-N metabolism and quality of tomato beneficially. Heliyon 2023; 9:e20470. [PMID: 37860516 PMCID: PMC10582307 DOI: 10.1016/j.heliyon.2023.e20470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 09/06/2023] [Accepted: 09/26/2023] [Indexed: 10/21/2023] Open
Abstract
Diazotrophic cyanobacteria are known to influence nutrient availability in soil, however, their benefits under elevated CO2 environment, particularly on fruit quality attributes, is a less investigated aspect. Laboratory developed cyanobacterium-fungal biofilm (An-Tr), composed of Anabaena torulosa (An) as the matrix with the partner as Trichoderma viride (Tr), along with the individual partners were evaluated under ambient (aCO2-400 ± 50 ppm) and elevated (eCO2-700 ± 50 ppm) conditions, with and without tomato plants. An-Tr inoculation exhibited distinct and significantly higher values for most of the soil microbiological parameters, plant growth attributes and antioxidant/defense enzyme activities measured at 30 and 60 DAI (days after inoculation). Significant enhancement in soil nutrient availability, leaf chlorophyll, with 45-50% increase in the enzyme activities related to carbon and nitrogen assimilation, higher yields and better-quality parameters of tomato, with An-Tr biofilm or An inoculation, were recorded, particularly under eCO2 conditions. The fruits from An-Tr treatments under eCO2 exhibited a higher titrable acidity, along with more ascorbic acid, carotenoids and lycopene content, highlighting the superiority of this inoculant. Multivariate analyses revealed significant (p ≤ 0.05) interactions among cultures, DAI, and CO2 levels, illustrating that cyanobacterial inoculation can be advocated as a strategy to gainfully sequester eCO2. Significant improvement in yield and fruit quality along with 50% N savings, further attest to the promise of cyanobacterial inoculants for tomato crop in the climate change scenario.
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Affiliation(s)
- Venkatesh Kokila
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Radha Prasanna
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Arun Kumar
- National Phytotron Facility, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Sekar Nishanth
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Bhupinder Singh
- Division of Environment Science, ICAR-Indian Agricultural Research Institute (IARI), New Delhi, 110 012, India
| | - Shalini Gaur Rudra
- Division of Food Science and Post Harvest Technology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Priya Pal
- Division of Food Science and Post Harvest Technology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Madan Pal
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Yashbir Singh Shivay
- Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Awani Kumar Singh
- Centre for Protected Cultivation Technology (CPCT), ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
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