Molecular and biochemical insight into biochar and Bacillus subtilis induced defense in tomatoes against Alternaria solani

Rasool, Mujahid; Akhter, Adnan; Haider, Muhammad Saleem

doi:10.1016/j.scienta.2021.110203

Cited by 25 publications

(29 citation statements)

References 91 publications

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“…were added to biochar (Arshad et al, 2021; Rasool et al, 2021a ). For example, the combination of biochar and B. subtilis was showed to stimulate not only the plant growth but also the response to the soil-inhabiting fungus Alternaria solani , as revealed by the overexpression of defense-associated genes, such as salicylic acid-related PR genes, and the significant reduction of the early blight symptoms (Rasool et al, 2021a , b ). Such effect was not so evident in this study since only the addition of Bacillus spp.…”

Section: Discussionmentioning

confidence: 99%

Effects of Biochar on the Growth and Development of Tomato Seedlings and on the Response of Tomato Plants to the Infection of Systemic Viral Agents

et al. 2022

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Biochar is a rich carbon product obtained by pyrolysis of biomass under a limited supply of oxygen. It is composed mainly of aromatic molecules, but its agronomic value is hard to evaluate and difficult to predict due to its great variable characteristics depending on the type of starting biomass and the conditions of pyrolysis. Anyway, it could be used as soil amendment because it increases the soil fertility of acidic soils, increases the agricultural productivity, and seems to provide protection against some foliar and soilborne diseases. In this study, the effects of biochar, obtained from olive pruning, have been evaluated on tomato seedlings growth and on their response to systemic agents' infection alone or added with beneficial microorganisms (Bacillus spp. and Trichoderma spp.). First, experimental data showed that biochar seems to promote the development of the tomato seedlings, especially at concentrations ranging from 1 to 20% (w/w with peat) without showing any antimicrobial effects on the beneficial soil bacteria at the tomato rhizosphere level and even improving their growth. Thus, those concentrations were used in growing tomato plants experimentally infected with tomato spotted wilt virus (TSWV) and potato spindle tuber viroid (PSTVd). The biochar effect was estimated by evaluating three parameters, namely, symptom expression, number of infected plants, and pathogen quantification, using RT-qPCR technique and −ΔΔCt analysis. Biochar at 10–15% and when added with Trichoderma spp. showed that it reduces the replication of PSTVd and the expression of symptoms even if it was not able to block the start of infection. The results obtained on TSWV-infected plants suggested that biochar could contribute to reducing both infection rate and virus replication. For systemic viral agents, such as PSTVd and TSWV, there are no curative control methods, and therefore, the use of prevention means, as can be assumed the use biochar, for example, in the nursery specialized in horticultural crops, can be of great help. These results can be an encouraging starting point to introduce complex biochar formulates among the sustainable managing strategies of plant systemic diseases.

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Section: Discussionmentioning

confidence: 99%

Effects of Biochar on the Growth and Development of Tomato Seedlings and on the Response of Tomato Plants to the Infection of Systemic Viral Agents

et al. 2022

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“…In addition to Fusarium, approximately 80% of tomato crop losses involve Alternaria solani, a causative agent of early blight disease [85]. The synergistic effect of green waste and wood biochar mixed with PGPR (Bacillus subtilis) inhibited the mycelial growth of A. solani by up to 55% in tomato [86]. Tariq et al [87] evaluated the effect of PGPR on bell pepper (Capsicum annuum) yield by applying a consortium of Klebsiella, Burkholderia, Panibacillus, and Bacillus spp.…”

Section: Role Of Pgpr In Vegetable Crop Productionmentioning

confidence: 99%

Plant-Growth-Promoting Rhizobacteria Emerging as an Effective Bioinoculant to Improve the Growth, Production, and Stress Tolerance of Vegetable Crops

Kumar

Giri

Pandey

et al. 2021

IJMS

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Vegetable cultivation is a promising economic activity, and vegetable consumption is important for human health due to the high nutritional content of vegetables. Vegetables are rich in vitamins, minerals, dietary fiber, and several phytochemical compounds. However, the production of vegetables is insufficient to meet the demand of the ever-increasing population. Plant-growth-promoting rhizobacteria (PGPR) facilitate the growth and production of vegetable crops by acquiring nutrients, producing phytohormones, and protecting them from various detrimental effects. In this review, we highlight well-developed and cutting-edge findings focusing on the role of a PGPR-based bioinoculant formulation in enhancing vegetable crop production. We also discuss the role of PGPR in promoting vegetable crop growth and resisting the adverse effects arising from various abiotic (drought, salinity, heat, heavy metals) and biotic (fungi, bacteria, nematodes, and insect pests) stresses.

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“…Zwart and Kim [72] observed that 5% of biochar added to growth media reduced the progression and physiological stress caused by Phytophthora canker in seedlings of Quercus rubra and Acer rubrum. Rasool et al [73] proved that in tomatoes affected by Alternaria solani, the response protection elicited was dependant on the type of biochar, and it involves both induced systemic resistance and acquired systemic resistance mechanisms. In our study, the addition of 0.2% of biochar may have induced a similar systemic response in Physalis ixocarpa since the plants were less affected by mildew infection in the biochar treatments.…”

Section: Effect Of Biochar and Biofertilizer On The Crop Physalis Ixocarpamentioning

confidence: 99%

Bamboo Biochar and a Nopal-Based Biofertilizer as Improvers of Alkaline Soils with Low Buffer Capacity

et al. 2021

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Alkaline soils with low buffering capacity are susceptible to amendments such as biochar or biofertilizers, which could drastically alter their pH. For that, this study aimed to evaluate the effectiveness of a low biochar and biofertilizer addition to improve soil characteristics and the use of nutrients to reduce the doses of chemical fertilizer. For that, we measured the initial effect of biochar addition on the soil characteristics. Then, to evaluate the changes produced by biochar and biofertilizer on cultivated soil, we carried out a greenhouse experiment with Physalis ixocarpa for two crop cycles. We also studied the nutrient use efficiency, comparing chemical fertilization at 100% (without biochar) against 50% and 20% with biochar on crop yield, plant height, fruit weight, and root length. Finally, we compared the combination of biochar and biofertilizer with the treatments mentioned earlier. The results showed that after adding 0.2% of bamboo biochar, bulk density (BD) decreased while CEC, as well as OM, Pav, Fe, and Cu contents, increased in the soil. The combination of biochar and biofertilizer improved WHC, Pav, and OM comparing to the soil added with biochar. We found that the bamboo biochar and nopal-based fertilizer are suitable improvers for the studied soil.

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Molecular and biochemical insight into biochar and Bacillus subtilis induced defense in tomatoes against Alternaria solani

Cited by 25 publications

References 91 publications

Effects of Biochar on the Growth and Development of Tomato Seedlings and on the Response of Tomato Plants to the Infection of Systemic Viral Agents

Effects of Biochar on the Growth and Development of Tomato Seedlings and on the Response of Tomato Plants to the Infection of Systemic Viral Agents

Plant-Growth-Promoting Rhizobacteria Emerging as an Effective Bioinoculant to Improve the Growth, Production, and Stress Tolerance of Vegetable Crops

Bamboo Biochar and a Nopal-Based Biofertilizer as Improvers of Alkaline Soils with Low Buffer Capacity

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