Effect of chitosan on physiology, photosynthesis and biomass of rice (Oryza sativa L.) under elevated ozone

Phothi, Rutairat; Theerakarunwong, Chonlada Dechakiatkrai

doi:10.21475/ajcs.17.11.05.p578

Cited by 29 publications

(19 citation statements)

References 17 publications

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“…As an example, chitosan treatment led to overexpression of photosynthesis-related genes in strawberry fruits ( Landi et al., 2017 ), increasing the fruit yield by more than 40% ( Akter Mukta et al., 2017 ). Similarly, chitosan treatment of rice plants resulted in increased photosynthesis rates and higher biomass ( Phothi and Theerakarunwong, 2017 ). Both examples suggest that chitosan treatment not only triggers the expression of photosynthesis-related genes, but indeed leads to increased photosynthetic activity.…”

Section: Discussionmentioning

confidence: 99%

Transcriptome Analysis of Solanum Tuberosum Genotype RH89-039-16 in Response to Chitosan

2020

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Potato ( Solanum tuberosum L.) is the worldwide most important nongrain crop after wheat, rice, and maize. The autotetraploidy of the modern commercial potato makes breeding of new resistant and high-yielding cultivars challenging due to complicated and time-consuming identification and selection processes of desired crop features. On the other hand, plant protection of existing cultivars using conventional synthetic pesticides is increasingly restricted due to safety issues for both consumers and the environment. Chitosan is known to display antimicrobial activity against a broad range of plant pathogens and shows the ability to trigger resistance in plants by elicitation of defense responses. As chitosan is a renewable, biodegradable and nontoxic compound, it is considered as a promising next-generation plant-protecting agent. However, the molecular and cellular modes of action of chitosan treatment are not yet understood. In this study, transcriptional changes in chitosan-treated potato leaves were investigated via RNA sequencing. Leaves treated with a well-defined chitosan polymer at low concentration were harvested 2 and 5 h after treatment and their expression profile was compared against water-treated control plants. We observed 32 differentially expressed genes (fold change ≥ 1; p-value ≤ 0.05) 2 h after treatment and 83 differentially expressed genes 5 h after treatment. Enrichment analysis mainly revealed gene modulation associated with electron transfer chains in chloroplasts and mitochondria, accompanied by the upregulation of only a very limited number of genes directly related to defense. As chitosan positively influences plant growth, yield, and resistance, we conclude that activation of electron transfer might result in the crosstalk of different organelles via redox signals to activate immune responses in preparation for pathogen attack, concomitantly resulting in a generally improved metabolic state, fostering plant growth and development. This conclusion is supported by the rapid and transient production of reactive oxygen species in a typical oxidative burst in the potato leaves upon chitosan treatment. This study furthers our knowledge on the mode of action of chitosan as a plant-protecting agent, as a prerequisite for improving its ability to replace or reduce the use of less environmentally friendly agro-chemicals.

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Section: Discussionmentioning

confidence: 99%

Transcriptome Analysis of Solanum Tuberosum Genotype RH89-039-16 in Response to Chitosan

2020

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“…Chitosan was also effective against water stress in Thymus daenensis Celak (Bistgani et al, 2017) and two species of basil (Ocimum ciliatum and Ocimum basilicum) (Pirbalouti et al, 2017). In the same way, it protected against cadmium (Cd) toxicity in Brassica rapa L. plants (Zong et al, 2017a,b) and against the effects of ozone in rice (Phothi and Theerakarunwong, 2017).…”

Section: Biopolymersmentioning

confidence: 96%

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

et al. 2020

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Biostimulants (BSs) are probably one of the most promising alternatives nowadays to cope with yield losses caused by plant stress, which are intensified by climate change. Biostimulants comprise many different compounds with positive effects on plants, excluding pesticides and chemical fertilisers. Usually mixtures such as lixiviates from proteins or algal extracts have been used, but currently companies are interested in more specific compounds that are capable of increasing tolerance against abiotic stress. Individual application of a pure active compound offers researchers the opportunity to better standarise formulations, learn more about the plant defence process itself and assist the agrochemical industry in the development of new products. This review attempts to summarise the state of the art regarding various families of organic compounds and their mode/mechanism of action as BSs, and how they can help maximise agricultural yields under stress conditions aggravated by climate change.

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“…In this context, the stimulatory role of chitosan in lignin biosynthesis and cell wall lignification in plants has been demonstrated by Vasconsuelo et al (31). Furthermore, chitosan may affect biosynthesis and translocation of carbohydrates during stimulated cell division and the synthesis of DNA and RNA (22).…”

Section: Discussionmentioning

confidence: 91%

Polymerization degree-dependent changes in the effects of in vitro chitosan treatments on photosynthetic pigment, protein, and dry matter contents of Ipomoea purpurea

Acemi

2019

The EuroBiotech Journal

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Morning Glory (Ipomoea purpurea (L.) Roth.) is a climbing plant known for its ornamental properties and ease of cultivation in temperate climates. Quality and colour of flowers and leaves, especially in the production of ornamentals, are important parameters both for producers and for customers. This study aimed to investigate the changes in photosynthetic pigment, protein and dry matter content of in vitro-propagated I. purpurea following chitosan treatment with different polymerization degrees (DP) and to determine the indirect effect of this biopolymer on leaves of the plant. Nodal explants of I. purpurea were cultured in medium supplemented with 5, 10 and 20 mg L−1 concentrations of a chitosan oligomers mixture with a variable degree of polymerization (DP) ranging from 2 to 15 or chitosan polymer with DP of 70. It was found that both oligomeric and polymeric chitosan treatments increased chlorophyll-a contents in the leaves when compared to the chitosan-naïve control group. Polymeric chitosan stimulated chlorophyll-b and carotenoid synthesis more effectively than the oligomer mixture. Also, 10 mg L−1 polymeric chitosan better triggered total protein production and plant dry matter content in I. purpurea. The results of this study showed that, due to their stimulatory effects on photosynthetic pigment, protein and plant dry matter production, chitosan oligomers at low concentration and polymers at moderate concentration might be considered as safe and natural biostimulants for ornamental plants which could affect the plant’s attractiveness and commercial success.

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Effect of chitosan on physiology, photosynthesis and biomass of rice (Oryza sativa L.) under elevated ozone

Cited by 29 publications

References 17 publications

Transcriptome Analysis of Solanum Tuberosum Genotype RH89-039-16 in Response to Chitosan

Transcriptome Analysis of Solanum Tuberosum Genotype RH89-039-16 in Response to Chitosan

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

Polymerization degree-dependent changes in the effects of in vitro chitosan treatments on photosynthetic pigment, protein, and dry matter contents of Ipomoea purpurea

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