lnduction of Resistance to Botrytis cinerea Pers in Pepper by p-Aminobutyric Acid


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Tosun N. , Aktaş L.

The Journal of Turkish Phytopathological Society, cilt.32, ss.175-184, 2003 (Diğer Kurumların Hakemli Dergileri)

  • Cilt numarası: 32 Konu: 3
  • Basım Tarihi: 2003
  • Dergi Adı: The Journal of Turkish Phytopathological Society
  • Sayfa Sayıları: ss.175-184

Özet

Biber fideleri kullamlarak, proteinik olmayan bir aminoasit Dl-beta-amino-n-butirik asitin (BABA), gti ktif hastahgl etmern Botrytis cinerea'yakarqr direnci uyarmadaki etkinlili aragnnlmqnr. Yapraklara piisktirtiilen BABA'nm gri kiif enfeksiyonunu V059.3 orarunda konfrol edebildili bulunmugtur. Aynca BABA ve ardrEk olarak uygulanan fungisitin (fenhexamide) sinerjik etkilegimi, BABA ve fungisitin tek baglanna uygulamalanna giire Vo82.2 dtneyne varan daha yiiksek bir koruma saglam$ff. BABA uygulanm4 bitkilerde artan direng, PR proteinleri kitinaz (PR-3), p-1,3 glukanaz (PR-2) and peroksidaz alrivitesindeki iinemli m$la birlikte olugmuqtrn. PR proteinleri ve proksidaz birikiminin, BABA'nn muhtemel etki geklinde temel bir rol oynama olasrhgr yiiksektir. Hasahk direncinin uyamasmrn yatu sra, BABA fotosentetik pigmentlerin (klorofil a, klorofil b and karotenoidler) igeri[inde ve krik boyunda dnemli artga neden olrnughn. 

Using pepper seedlings, the nonprotein amino acid, Dl-beta-amino-n-butyric acid (BABA) was assayed for its ability to induce resistance in pepper against gray mould disease caused by Botrytis cinerea.It was found that foliar spray of BABA to leaves confrolled the gray mould infection by 59.37o. Moreover, the synergistic interaction between BABA and subsequent treatment of fungicide (fenhexamide) gave a higher protection rale reaching to 82.27o when compared with the single Eeatments of BABA and fungicide. The enhanced resistance of BABA-reated plants was associated with significant increases in the activities of PR proteins chitinases (PR-3), p-1,3 glucanase (PR-2) and peroxidase. Accumulation of PR proteins and peroxidase may play an essential role in BABA's possible mode of action. Besides the induction of disease resistance, BABA caused a significant increase in the content of photosynthetic pigments (chlorophyl a, chlorophyl b and carotenoids) and root heights in reated pepper plants.