Biochemical changes in the leaves of mungbean (Vigna radiata) plants infected by phytoplasma

Abstract

Biochemical changes in the leaves of mungbean (Vigna radiata) plants infected by phytoplasma[Fitoplazma ile enfekte olan mungbean (Vigna radiata) bitkilerinin yapraklarındaki biyokimyasal değişiklikler] Abstract Objective: Phyllody disease caused by phytoplasma is an emerging problem in mungbean worldwide. However, the alterations in the host physiology and its associated biochemical components induced by the infection with phytoplasma in mungbean plant remain unknown. Hence the present study was performed with the diseased plants in order to determine the patho-physiological changes that take place. Methods: Under present study, the changes in total phenolic compounds, total soluble proteins, peroxidase (POD), catalase (CAT), polyphenol oxidase (PPO), Chlorophyll a, Chlorophyll b, and total chlorophyll were studied in leaves of phytoplasma-infected and healthy plants of six mungbean genotypes. Results: Total phenols were decreased significantly in four but increased in one genotype. Protein contents were increased significantly in two genotypes, POD in four, PPO in one and PAL in two genotypes. However, activity of CAT and amount of Chl a, Chl b and total Chl were decreased significantly in all genotypes. Conclusion: These results suggest that phytoplasma can interfere with host metabolism and photosynthesis to induce disease. In conclusion, this study provides new insights into the mungbean response to phytoplasma infection.

Candidatus Phytoplasma trifolii (16SrVI) infection modifies the polyphenols concentration in pepper (Capsicum annuum) plant tissues

“…Although few studies have linked the incidence of phytoplasma infection to increase in the phenolic compounds in different crops, such as Malus pumina and Prunus domestica (Musetti, Favali, & Pressacco, ), Zea mays (Junqueira et al., ), Vitis vinifera (Margaria et al., ), Theobroma cacao (Ondobo et al., ) and Vigna radiata (Hameed et al., ), there is insufficient information regarding the effect of phytoplasma over the polyphenols content in the pepper plants. In a more specific manner, biochemical changes at the phenylpropanoid pathway level among different pepper plant tissues are less known.…”

Biological Control of Root Rot Disease and Growth Promotion in Fenugreek (Trigonella foenum-graecum L.) Mediated by Microbial Antagonism

“…The participation of protein constituents is known in plant pathogenic interactions as a mechanism of plant disease resistance (Hameed et al, 2017). Increased protein content was previously reported in plants due to their treatment with PGPR (Junqueira et al, 2004;Pandey et al, 2018).…”

“…Phenolics are eminent antimicrobial secondary metabolites acting as precursors to structural polymers or as signal molecules activating plant defense genes (Hameed et al, 2017). Reduction in the phenolics in the plant tissues indicated the susceptibility of the plant to fungal infection (Junqueira et al, 2004;Ewané et al, 2012).…”

Characterization of a novel strain of Candidatus Phytoplasma aurantifolia infecting cowpea (Vigna unguiculata) based on 16S rDNA sequence analysis

“…They have also been reported to infect many leguminous crops such as greengram (Hameed et al 2017), chickpea (Latha et al 2021), French bean (Arocha et al 2008), cowpea, pigeonpea and lentil (Rao et al 2017a).…”