Role of Glycine in Protecting Pectinophora Gossypiella (Saund.) Against Strong Protein-Denaturing Activity of Phenolic Compounds in Cotton Plants

Ahmed, Dina A.; El-Sharkawy, Manal A.A.; Hassan, K.; Shairra, Souad

doi:10.21608/jppp.2014.88026

Cited by 2 publications

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“…Also, it could be noted that the generality of glycine secretion related to the concentration of PCs; whereas the less in glycine content was more clear association with the detoxification activity of the PCs. These findings approve our early findings(Ahmed et al, 2014), and in agreement with(konno et al, 2009).Whether glycine is the only amino acid that has a role against the PCs defense? And what amino acids structure is important for the PCs activity inhibition?…”

supporting

confidence: 94%

Role of Amino Acids in Protecting Pectinophora Gossypiella (Saund.) Against Strong Protein-Denaturing Activity of Phenolic Compounds in Cotton Plants

Abd-Elfattah

2019

Egyptian Journal of Agricultural Research

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o test if the generality of glycine secretion in the pink bollworm larvae related to the concentration of phenolic compounds (PCs), a feeding experiment with two concentrations of selected two PCs (pyrocatechol; Pyro & resorcinol; Res) was performed. Then, we determined and compared the lysine and glycine contents in the total body homogenate of treated and untreated 4 th instar larvae. Results showed that the lysine and glycine contents recorded were 2.29 & 1.47 mg/100mg of control larval body weight. Lysine content increased at low PCs concentration by 5.68 & 7.42% for Pyro and Res, respectively. On the other hand, its concentration decreased at high PCs concentration by 0.87 & 0.44%, respectively. On the other hand, glycine content generally decreased (except at low concentration of Pyro; 8.84%) by 4.76, 4.08 & 12.24%. Also, it could be noted that the generality of glycine secretion related to the concentration of PCs; whereas the less in glycine content was more notable in high concentration of PCs. And, the loss in glycine content was more than that for lysine. Also, studies extend to other amino acids (AA) and the results indicated that it could be grouped AA in 3 groups: 1. A high AA concentration (more than 3 mg/100mg): GLU and ASP acid. 2. A moderate AA concentration (more than 2 mg/100mg): VAL, LEU, LYS, ARG, ALA and TYR. 3. A low AA concentration (less than 2 mg/100mg): THR, ILE, PHE, HIS, CYS, SER, GLY and PRO. In the control PBW, glutamic acid and aspartic acid were present in high concentration (4.24 & 3.19 mg/100mg, respectively). As same manner with glycine; the losses in GLU and ASP contents were more than that for LYS. So, it could be used by PBW to overcome PCs toxicity. In addition, generally, at low PCs concentration, AA content increased except in the case of VAL and CYS. On contrast, at high PCs concentration, AA content decreased except in the case of MET, PHE, HIS and TYR. Commonly, it could be noted that Val, Cys, Gly and Ala had a higher percent of reduction. So, it means that other free amino acids may be used by some herbivores as counteractive agents against the denaturing activity of PCs.

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confidence: 94%

Role of Amino Acids in Protecting Pectinophora Gossypiella (Saund.) Against Strong Protein-Denaturing Activity of Phenolic Compounds in Cotton Plants

Abd-Elfattah

2019

Egyptian Journal of Agricultural Research

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“…Also, it used as source of energy producing compounds (Van Marrewijk & Ravestein et al, 1974), as a taxonomic tool (Schaefer & Wallace, 1967), and for the determination of nutritional requirements (Kleiner & Peacock, 1971). Further, some insects can develop molecular strategies depended on the secretion amino acids as a neutralizer, to feed on the host plants which defended by accumulated PCs (Konno et al, 2010and Ahmed et al, 2014& 2019.…”

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confidence: 99%

Comparative Studies on the Free Amino Acid Composition in the Total Body Homogenate of some Lepidopterous and Neuropterous Insects دراسة لمقارنة محتوى الأحماض الأمینیة لبعض حشرات رتبتی حرشفیة وشبکیة الأجنحة

الشناوی¹,

أحمد²,

الشرقاوى³

2019

Journal of Plant Protection and Pathology

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Three different insect species belonging to three families [i.e. P. gossypiella (PBW), S. littoralis (CLW) and C. carnea (APL)] were studied for their amino acid composition. Seventeen free amino acids (FAA) figured out in the total body homogenate of the tested insects. The essential AA were threonine (THR), valine (VAL), methionine (MET), isoleucine (ILE), leucine (LEU), phenylalanine (PHE), lysine (LYS). Semi-essential AA were histidine (HIS), arginine (ARG), cysteine (CYS), and Non-essential were aspartic acid (ASP), serine (SER), glutamic acid (GLU), glycine (GLY), alanine (ALA), tyrosine (TYR), and proline (PRO). Generally, results showed that non-essential AA were the most predominant fraction of FAA, following by essential then semi-essential AA, and the PBW had the highest average of AA (1.89, 1.32 & 2.41 for essential, semi-essential & non-essential AA, respectively), followed by APL (1.78, 1.22 & 2.34, respectively), then CLW (1.66, 1.16 & 2.17, respectively). In details, from the results it could be grouped AA in 3 groups as follows: 1-A high AA concentration (more than 3 mg/100mg). 2-A moderate AA concentration (more than 2 mg/100mg). 3-A low AA concentration (less than 2 mg/100mg).The results showed that the PBW characterized by a high AA concentration of ASP (3.19 mg/100mg) and GLU (4.24 mg/100mg), while CLW and APL had only a high AA concentration of GLU (3.98 & 5.24 mg/100mg, respectively), and a moderate concentration of ASP (2.46 & 2.90 mg/100mg, respectively). In addition, GLU had a highest concentration in APL. The obtained results indicated that glutamic acid and aspartic acid (non-essential AA) were the most predominant FAA. For moderate AA, PBW characterized by an amino acids VAL and TYR (2.28 mg/100mg; 17.26% & 2.53 mg/100mg; 13.88%, respectively). In contrast, CLW and APL had a low VAL and TYR concentration (1.73 & 1.78 mg/100mg; 14.91 & 14.25% & 1.63 & 1.87 mg/100mg; 9.96 & 10.61% for VAL & TYR, respectively). Also, ALA had a moderate concentration in PBW (2.28 mg/100mg) and CLW (2.50 mg/100mg), while had a low concentration in APL (1.83 mg/100mg). In addition, CYS had a least concentration of AA (0.55, 0.59 and 0.57 mg/100mg for PBW, CLW and APL, respectively.

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Role of Glycine in Protecting Pectinophora Gossypiella (Saund.) Against Strong Protein-Denaturing Activity of Phenolic Compounds in Cotton Plants

Cited by 2 publications

References 0 publications

Role of Amino Acids in Protecting Pectinophora Gossypiella (Saund.) Against Strong Protein-Denaturing Activity of Phenolic Compounds in Cotton Plants

Role of Amino Acids in Protecting Pectinophora Gossypiella (Saund.) Against Strong Protein-Denaturing Activity of Phenolic Compounds in Cotton Plants

Comparative Studies on the Free Amino Acid Composition in the Total Body Homogenate of some Lepidopterous and Neuropterous Insects دراسة لمقارنة محتوى الأحماض الأمینیة لبعض حشرات رتبتی حرشفیة وشبکیة الأجنحة

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