Extending Cassava Root Shelf Life via Reduction of Reactive Oxygen Species Production

Zidenga, Tawanda; Leyva-Guerrero, Elisa; Moon, Haksu; Siritunga, Dimuth; Sayre, Richard T.

doi:10.1104/pp.112.200345

Cited by 141 publications

(173 citation statements)

References 56 publications

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“…Furthermore, other evidence has suggested that overexpression of AOX1 could increase stress tolerance ability by generating less ROS (Vanlerberghe et al, 2009). However, most of these genetics studies were performed on the dicot plants Arabidopsis thaliana and Nicotiana tabacum or on species with unique physiological processes (Wang et al, 2011;Zidenga et al, 2012). Therefore, the function of AOX1 in monocot rice remains largely unknown.…”

Section: Introductionmentioning

confidence: 99%

Overexpression of an alternative oxidase gene, OsAOX1a, improves cold tolerance in Oryza sativa L.

Li¹,

Liang²,

Xu³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Low temperature is a major environmental stress in rice cultivating and production. The alternative oxidase 1 (AOX1) gene is potentially important for genetic engineering to increase cold adaptation. However, previous studies related to this effect have mostly focused on the dicot plants Arabidopsis and tobacco, whereas functional research on rice is limited. In this study, we cloned a rice predominant cold-response AOX1 gene, OsAOX1a. Transgenic rice plants with overexpression of OsAOX1a were obtained. We found that OsAOX1a overexpression could strongly enhance the cold growth of seedlings, especially with respect to root extension. However, growth between transgenic and control plants did not differ under normal conditions. Furthermore, the lipid peroxidation and ion leakage rate were determined after cold treatment in transgenic plants. Both factors were reduced by OsAOX1a OsAOX1a overexpression enhanced cold tolerance overexpression, which revealed that OsAOX1a could reduce oxidative damage under cold stress. Taken together, our results suggested that overexpressing OsAOX1a could improve growth performance of rice under cold stress, which might be closely related to the reduction of reactive oxygen species generation and oxidative damage.

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Section: Introductionmentioning

confidence: 99%

Overexpression of an alternative oxidase gene, OsAOX1a, improves cold tolerance in Oryza sativa L.

Li¹,

Liang²,

Xu³

et al. 2013

Genet. Mol. Res.

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“…PPD is initiated by mechanical damage, which typically occurs during tuberous roots harvesting and progresses from the proximal site of damage to the distal end, making the roots unpalatable within 72 h [22,23]. Reactive oxygen species (ROS) production has been identified as one of the earliest events in PPD [21,22,24]. Under conditions of stress, the equilibrium between the production and scavenging of ROS is disturbed, resulting in a rapid increase in the buildup of ROS known as an oxidative burst [25].…”

Section: Postharvest Physiological Deterioration and Storagementioning

confidence: 99%

Recent Biotechnological Advances in the Improvement of Cassava

Fondong¹,

Rey²

2018

Cassava

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Cassava (Manihot esculenta Crantz) is the fourth most important source of carbohydrates for human consumption in the tropics and thus occupies a uniquely important position as a food security crop for smallholder farmers. Consequently, cassava improvement is of high priority to most national agricultural research institutions in the tropics. With advances in functional genomics and genome editing approaches in this post genomics era, there are unprecedented opportunities and potential to accelerate the improvement of this important crop. These new technologies will need to be directed toward addressing major cassava production constraints, notably virus resistance, protein content, tolerance to drought and reduction of hydrogen cyanide content. Here, we discuss the important role novel functional genomics and genome editing technologies have and will continue to play in cassava improvement efforts. These approaches, including artificial miRNA (amiRNA), trans-acting small interfering RNA (tasiRNA), clustered regularly interspaced short palindromic repeat (CRISPR)-associated protein 9 (Cas9), and Targeting Induced Local Lesions IN Genomes (TILLING), have been shown to be effective in addressing major crop production constraints. In addition to reviewing specific applications of these technologies in cassava improvement, this chapter discusses specific examples being deployed in the amelioration of cassava or of other crops that could be applied to cassava in future.

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“…Based on the stability of each individual contaminant, including its by-products, the mobility can also be spontaneously inluenced by the rate of conversion, thus degradation, and can even become volatilised under suitable conditions [65,70], depending on vapour pressure. Time or length of exposure is a very important aspect, particularly where human exposure is assessed, which is generally neglected or unclear in many recent studies.…”

Section: Behaviour Of Cyanogen and Mycotoxin In Soilmentioning

confidence: 99%

Leaching of Cyanogens and Mycotoxins from Cultivated Cassava into Agricultural Soil: Effects on Groundwater Quality

Itoba-Tombo¹,

Ntwampe²,

Mudumbi³

2017

Aflatoxin-Control, Analysis, Detection and Health Risks

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Cyanogens and mycotoxins are vital in protecting lora against predation. Nevertheless, their increased concentrations and by-products in agricultural soil could result in produce contamination and decreased crop yield and soil productivity. When exposed to unsuitable weather conditions, agricultural produce such as cassava is susceptible to bacterial and fungal atack, culminating in spoilage, particularly in arid and semi-arid regions, and contributing to cyanogen and mycotoxins loading of the arable land. The movement of cyanogen including mycotoxins in such soil can result in sub-surface and/ or groundwater contamination, thus deteriorating the soil's environmental health and negatively afecting wildlife and humans. Persistent cyanogen and mycotoxins loading into agricultural soil changes its physico-chemical characteristics and biotic parameters. These contaminants and their biodegradation by-products can be dispersed from soil's surface and sub-surface to groundwater systems by permeation and percolation through the upper soil layer into underground water reservoirs, which can result in their exposure to humans and wildlife. Thus, an assessment and monitoring of cyanogen and mycotoxins loading impacts on arable land and groundwater in communities with minimal resources should be done. Overall, these toxicants impacts on agricultural soil's biotic community, afect soil's aggregates, functionality and lead to the soil's low productivity, cross-contamination of fresh agricultural produce.

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Extending Cassava Root Shelf Life via Reduction of Reactive Oxygen Species Production

Cited by 141 publications

References 56 publications

Overexpression of an alternative oxidase gene, OsAOX1a, improves cold tolerance in Oryza sativa L.

Overexpression of an alternative oxidase gene, OsAOX1a, improves cold tolerance in Oryza sativa L.

Recent Biotechnological Advances in the Improvement of Cassava

Leaching of Cyanogens and Mycotoxins from Cultivated Cassava into Agricultural Soil: Effects on Groundwater Quality

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