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14 resultados
Characterization of an acidic chitinase from seeds of black soybean (Glycine max (L) Merr Tainan No. 3).
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Using 4-methylumbelliferyl-β-D-N,N',N″-triacetylchitotrioside (4-MU-GlcNAc3) as a substrate, an acidic chitinase was purified from seeds of black soybean (Glycine max Tainan no. 3) by ammonium sulfate fractionation and three successive steps of column chromatography. The purified chitinase was a
Molecular cloning and ethylene-inducible expression of Chib1 chitinase from soybean (Glycine max (L.) Merr.).
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A soybean seed-specific PR-8 chitinase, named Chib2, has a markedly extended C-terminal segment compared to other plant Chib1 homologues of the PR-8 chitinase family known to date. To further characterize the molecular structure and the expression pattern of this chitinase family, we cloned two
Characterization and expression of chitinase and 1,3-beta-glucanase genes in cotton.
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We have isolated cDNA clones representing mRNAs encoding chitinase and 1,3-beta-glucanase in cotton (Gossypium hirsutum L.) leaves. The chitinase clones were sequenced and found to encode a 28,806 Da protein with 71% amino acid sequence similarity to the SK2 chitinase from potato (Solanum
A novel family of lectins evolutionarily related to class V chitinases: an example of neofunctionalization in legumes.
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A lectin has been identified in black locust (Robinia pseudoacacia) bark that shares approximately 50% sequence identity with plant class V chitinases but is essentially devoid of chitinase activity. Specificity studies indicated that the black locust chitinase-related agglutinin (RobpsCRA)
Chitinase and peroxidase in effective (fix(+)) and ineffective (fix (-)) soybean nodules.
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Chitinase and peroxidase, two enzymes thought to be involved in the defense of plants against pathogens, were measured in soybean (Glycine max L. Merr.) roots and in nodules colonized by Bradyrhizobium japonicum strains differing in their symbiotic potential. Activities of both enzymes were higher
A class I chitinase from soybean seed coat.
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Protein extracts from soybean (Glycine max [L.] Merr) seed hulls were fractionated by isoelectric focusing and SDS-PAGE analysis and components identified by peptide microsequencing. An abundant 32 kDa protein possessed an N-terminal cysteine-rich hevein domain present in class I chitinases and in
Plant chitinase responses to different metal-type stresses reveal specificity.
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CONCLUSIONS
Chitinases in Glycine max roots specifically respond to different metal types and reveal a polymorphism that coincides with sensitivity to metal toxicity. Plants evolved various defense mechanisms to cope with metal toxicity. Chitinases (EC 3.2.1.14), belonging to so-called
Heavy-metal stress induced accumulation of chitinase isoforms in plants.
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Plant chitinases belong to so-called pathogenesis related proteins and have mostly been detected in plants exposed to phytopathogenic viruses, bacteria or fungi. A few studies revealed that they might also be involved in plant defence against heavy metals. This work was undertaken to monitor the
A class III acidic endochitinase is specifically expressed in the developing seeds of soybean (Glycine max [L.] Merr.).
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A soybean chitinase which has an apparent molecular mass of 28 kDa by SDS-PAGE, and has chitinase specific activity of 133 units per mg protein at pH 5.2 and an apparent pI of 5.7, was purified from mature dry seeds. Based upon the selected part (the residue positions 10-17) of the determined
Biocontrol efficacy and plant growth promoting activity of Bacillus altitudinis isolated from Darjeeling hills, India.
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A total of 18 bacterial isolates were obtained from the rhizosphere of Sechium edule growing in the lower foothills of Darjeeling, India. The bacterial isolates were tested for PGPR traits in vitro such as phosphate solubilization, HCN, siderophore, IAA, chitinase, protease production as well as
Comparative analyses of three legume species reveals conserved and unique root extracellular proteins.
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Increasing evidence suggests that root extracellular proteins are involved in interactions between roots and their soil environment. In the present study, exudates released by 6-day-old roots of the three legume species white lupin (Lupinus albus), soybean (Glycine max), and cowpea (Vigna sinensis)
Molecular characterisation of Ltchi7, a gene encoding a Class III endochitinase induced by drought stress in Lotus spp.
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Chitinases are enzymes that digest chitin molecules, present principally in insects and fungi. In plants, these enzymes play an important role in defence against pathogen attack, although they have also been described as induced by mechanical damage, ozone, heavy metals, cold, salinity, etc. Using
Increased Levels of Antinutritional and/or Defense Proteins Reduced the Protein Quality of a Disease-Resistant Soybean Cultivar.
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The biochemical and nutritional attributes of two soybean (Glycine max (L.) Merr.) cultivars, one susceptible (Seridó) and the other resistant (Seridó-RCH) to stem canker, were examined to assess whether the resistance to pathogens was related to levels of antinutritional and/or defense proteins in
GmPep914, an eight-amino acid peptide isolated from soybean leaves, activates defense-related genes.
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Only a handful of endogenous peptide defense signals have been isolated from plants. Herein, we report a novel peptide from soybean (Glycine max) leaves that is capable of alkalinizing the media of soybean suspension cells, a response that is generally associated with defense peptides. The peptide,
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