Germin-Like Oxalate Oxidase Activity Increase in Auxin-Treated Wheat Coleoptiles

Mahmut ÇALIŞKAN

Makale detayları

Germin-Like Oxalate Oxidase Activity Increase in Auxin-Treated Wheat Coleoptiles

Yazarlar:

Mahmut ÇALIŞKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Botany 2000 Vol.24 Issue 6, pp.329-335

Belge Tipi:

Makale

Yayın Tarihi:

5/2000

Belge Dili:

Türkçe

Document ID (Org No.):

2000724586

Sıklık:

İki Aylık

eISSN:

1303-6106

pISSN:

1300-008X

Özet:

 

Oxalic acid or more commonly its salts, oxalates, are widely distributed throughout the plant kingdom. Oxalic acid is  generally considered an inert product of metabolism and its accumulation is toxic to tissues. Therefore, the enzymes degrading oxalic acid have received considerable attention. Oxalate oxidase is an oxidoreductase which degrades oxalate into CO2  and H2O2 . Recently, oxalate oxidase was shown to have high amino acid homology with germin proteins and at the same time cereal germin proteins were shown to have oxalate oxidase activity.  Germin gene expression was shown to be auxin responsive. It was well demonstrated that coleoptile cells underwent extensive  elongation upon auxin treatment. In the current study, it was shown that during auxin-induced wheat coleoptile elongation there  was an increase in the activity of germin-like oxalate oxidase. This activity which produce H2O2  may restrict cell elongation by mediating cross-linking of cell wall polymers.

 

Oxalic acid or more commonly its salts, oxalates, are widely distributed throughout the plant kingdom. Oxalic acid is  generally considered an inert product of metabolism and its accumulation is toxic to tissues. Therefore, the enzymes degrading oxalic acid have received considerable attention. Oxalate oxidase is an oxidoreductase which degrades oxalate into CO2  and H2O2 . Recently, oxalate oxidase was shown to have high amino acid homology with germin proteins and at the same time cereal germin proteins were shown to have oxalate oxidase activity.  Germin gene expression was shown to be auxin responsive. It was well demonstrated that coleoptile cells underwent extensive  elongation upon auxin treatment. In the current study, it was shown that during auxin-induced wheat coleoptile elongation there  was an increase in the activity of germin-like oxalate oxidase. This activity which produce H2O2  may restrict cell elongation by mediating cross-linking of cell wall polymers.

Makale detayları

Germin-Like Oxalate Oxidase Activity Increase in Auxin-Treated Wheat Coleoptiles

Yazarlar: Mahmut ÇALIŞKAN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Botany 2000 Vol.24 Issue 6, pp.329-335

Belge Tipi: Makale

Yayın Tarihi: 5/2000

Belge Dili: Türkçe

Document ID (Org No.): 2000724586

Sıklık: İki Aylık

eISSN: 1303-6106

pISSN: 1300-008X

Sayı

Yazarlar:

Mahmut ÇALIŞKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Botany 2000 Vol.24 Issue 6, pp.329-335

Belge Tipi:

Makale

Yayın Tarihi:

5/2000

Belge Dili:

Türkçe

Document ID (Org No.):

2000724586

Sıklık:

İki Aylık

eISSN:

1303-6106

pISSN:

1300-008X