Enzymatic and hormonal studies in Acacia eburnea infected with Ravenelia esculenta

Gandhe, Kanchanganga; Aniket, Kuvalekar

doi:10.11609/jott.zpj.1723.2781-5

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Activation of POX indicates the biochemical hurdle posed by the host to the growth of the pathogen. But the pathogen successfully establishes in the host and sporulates profusely at severe infection stage (Stage VII), even when there is maximal activity of peroxidase in terms of all the parameters studied previously by the authors (Gandhe and Kuvalekar 2007). We also analyzed these POX from various disease stages for their preference of substrates (guaiacol, chlorogenic acid, caffeic acid and tetramethyl benzidine) at different pH values (5.0 to 8.0) (data not in context with this paper).…”

Section: Discussionmentioning

confidence: 81%

Hydrogen peroxide generation and lignification by peroxidases from Acacia eburneainfected with Ravenelia esculenta

Kuvalekar¹,

Gandhe²

2010

PLANT SOIL ENVIRON

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Ravenelia esculenta Naras. and Thirum. is a rust fungus which infects Acacia eburnea Willd. producing hypertrophy in the infected organs. We analysed the changes in the reaction patterns of peroxidase from the tissues at progressive disease stages. Peroxidases (POX) from the tissues were analysed for oxidation of reduced nicotinamine adenine dinucleotide (NADH), NADH-dependent hydrogen peroxide (H2O2) generation and polymerization of cinnamyl alcohol, a lignin precursor in plants. The effect of cofactors like Mn2+ and dichlorophenol (DCP) was also studied. Effect of externally added H2O2 on NADH oxidation and cinnamyl alcohol polymerization was analyzed. NADH oxidation and H2O2 generation are accelerated by supplement of cofactors. The cofactor requirements of the two reactions are different. The amount of H2O2 generated varies with disease stages, but the rate of NADH oxidation is comparable. Externally added H2O2 has an accelerating effect on NADH oxidation. Cinnamyl alcohol polymerizing activity of POX increased with disease progression and was strongly inhibited by H2O2. Stimulation of these reactions by cofactors has a physiological significance in terms of susceptibility of the host.

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Section: Discussionmentioning

confidence: 81%

Hydrogen peroxide generation and lignification by peroxidases from Acacia eburneainfected with Ravenelia esculenta

Kuvalekar¹,

Gandhe²

2010

PLANT SOIL ENVIRON

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Auxin-like activity of extract from hypertrophied tissue of Acacia eburnea infected with Ravenelia esculenta

Aniket¹,

Pawar

Ankita

et al. 2008

Plant Cell Tiss Organ Cult

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Ravenelia esculenta Naras. and Thirum. is a rust, pathogenic to Acacia eburnea Willd. The infection leads to hypertrophy changing the morphology with bizarre shapes of plant organs. Healthy and infected tissues were subjected to extraction of IAA and indole derivatives and were estimated by spectrophotometric methods. The hypertrophy produced was presumed to be due to increase in the indole-3-acetic acid (IAA) content in the infected tissue, however, the amount of IAA in infected tissues decreased with the progression of disease. Concomitantly, the infected tissue showed the presence of a novel, slow migrating, indole derivative on TLC. Cultured shoot tips of Withania somnifera were dosed with the methanolic extract of the infected hypertrophied tissue (MEHT) (0.25, 0.5, 0.75, 1.00 and 1.25 mg/l). The stimulation in shoot growth along with profuse rooting was observed in a dose dependent manner with maximum at 1.00 and 1.25 mg/l concentration.

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Notes, outline and divergence times of Basidiomycota

et al. 2019

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The Basidiomycota constitutes a major phylum of the kingdom Fungi and is second in species numbers to the Ascomycota. The present work provides an overview of all validly published, currently used basidiomycete genera to date in a single document. An outline of all genera of Basidiomycota is provided, which includes 1928 currently used genera names, with 1263 synonyms, which are distributed in 241 families, 68 orders, 18 classes and four subphyla. We provide brief notes for each accepted genus including information on classification, number of accepted species, type species, life mode, habitat, distribution, and sequence information. Furthermore, three phylogenetic analyses with combined LSU, SSU, 5.8s, rpb1, rpb2, and ef1 datasets for the subphyla Agaricomycotina, Pucciniomycotina and Ustilaginomycotina are conducted, respectively. Divergence time estimates are provided to the family level with 632 species from 62 orders, 168 families and 605 genera. Our study indicates that the divergence times of the subphyla in Basidiomycota are 406–430 Mya, classes are 211–383 Mya, and orders are 99–323 Mya, which are largely consistent with previous studies. In this study, all phylogenetically supported families were dated, with the families of Agaricomycotina diverging from 27–178 Mya, Pucciniomycotina from 85–222 Mya, and Ustilaginomycotina from 79–177 Mya. Divergence times as additional criterion in ranking provide additional evidence to resolve taxonomic problems in the Basidiomycota taxonomic system, and also provide a better understanding of their phylogeny and evolution.

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Enzymatic and hormonal studies in Acacia eburnea infected with Ravenelia esculenta

Cited by 3 publications

References 13 publications

Hydrogen peroxide generation and lignification by peroxidases from Acacia eburneainfected with Ravenelia esculenta

Hydrogen peroxide generation and lignification by peroxidases from Acacia eburneainfected with Ravenelia esculenta

Auxin-like activity of extract from hypertrophied tissue of Acacia eburnea infected with Ravenelia esculenta

Notes, outline and divergence times of Basidiomycota

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