Page 17 - Demo

tr.timacagro.com 15Bitkilerin Gizli Kahramanlar%u0131: Bitki Geli%u015fim D%u00fczenleyicileriantioksidan kapasiteyi art%u0131r%u0131r. Khan ve ark. (2020), zeatinin k%u00f6k sistemini g%u00fc%u00e7lendirdi%u011fini, Zahir ve ark. (2001) meyve kalitesini iyile%u015ftirdi%u011fini ve Dobrev ve Vankova (2012) oksidatif stresi azalt%u0131c%u0131 etkisini g%u00f6stermi%u015ftir.Glisin BetainGlisin betain, kuaterner amonyum bile%u015fi%u011fi olup kimyasal yap%u0131s%u0131 C5H11NO2 %u015feklindedir. %u00d6zellikle %u00e7evresel streslere (tuzluluk, kurakl%u0131k ve d%u00fc%u015f%u00fck s%u0131cakl%u0131k gibi) kar%u015f%u0131 bitkileri korumada avantaj sa%u011flar. Y%u0131lmaz ve ark. (2019), glisin betainin kurakl%u0131k alt%u0131nda su kullan%u0131m%u0131n%u0131 art%u0131rd%u0131%u011f%u0131n%u0131, Ashraf ve Foolad (2007) tuz stresinde fotosentez kapasitesini korudu%u011funu ve Chen ve Murata (2008) so%u011fuk stresinde h%u00fccre zarlar%u0131n%u0131 stabilize etti%u011fini g%u00f6stermi%u015ftir.Amino Asitler ve Metabolik %u00d6nemiBitkilerde amino asitler proteinlerin yap%u0131 ta%u015flar%u0131 olarak %u00f6nemli metabolik roller %u00fcstlenir. %u00d6zellikle prolin amino asidi (C5H9NO2), stres ko%u015fullar%u0131nda h%u00fccresel koruma sa%u011flar ve fotosentez etkinli%u011fini art%u0131r%u0131r. Szabados ve Savour%u00e9 (2010), prolinin fotosentez kapasitesini art%u0131rd%u0131%u011f%u0131n%u0131, Ramazan ve ark. (2018) ise stres ko%u015fullar%u0131nda bitki dayan%u0131kl%u0131l%u0131%u011f%u0131n%u0131 y%u00fckseltti%u011fini g%u00f6stermi%u015ftir.Deniz Yosunlar%u0131Deniz yosunlar%u0131, %u00f6zellikle kahverengi deniz yosunlar%u0131 (Ascophyllum nodosum ve Ecklonia maxima gibi) bitki b%u00fcy%u00fcmesini destekleyen %u00f6nemli do%u011fal kaynaklard%u0131r. Bu yosunlar, alginik asit, mannitol, laminarin, sitokininler, gibberellinler, amino asitler ve mikro elementler a%u00e7%u0131s%u0131ndan zengin olup, bitkilerin b%u00fcy%u00fcme s%u00fcre%u00e7lerini te%u015fvik eder ve %u00e7evresel streslere kar%u015f%u0131 dayan%u0131kl%u0131l%u0131%u011f%u0131n%u0131 art%u0131r%u0131r. Yosun ekstraktlar%u0131, toprak yap%u0131s%u0131n%u0131 iyile%u015ftirerek su tutma kapasitesini art%u0131r%u0131r, bitkilerin k%u00f6k geli%u015fimini te%u015fvik eder ve bitkilerde klorofil %u00fcretimini y%u00fckselterek fotosentez etkinli%u011fini art%u0131r%u0131r. Ayr%u0131ca, biyolojik aktiviteyi art%u0131r%u0131c%u0131 %u00f6zellikleri nedeniyle tar%u0131msal uygulamalarda organik ve s%u00fcrd%u00fcr%u00fclebilir %u00fcretim y%u00f6ntemleri i%u00e7inde tercih edilir.Kaynaklar:%u2022 Rademacher, W. (2015). Plant growth regulators: Backgrounds and uses in plant production. Journal of Plant Growth Regulation, 34(4), 845-872.%u2022 Havlova, M., et al. (2008). The role of cytokinins in responses to water deficit in tobacco plants. Plant, Cell & Environment, 31(3), 341-353.%u2022 Palni, L. M. S., et al. (1990). Cytokinin biochemistry and its relation to plant growth. Annual Review of Plant Physiology, 41, 105-119.%u2022 Khan, A., et al. (2020). Plant growth promoting endophytic bacteria augment growth in rice plants. Plant Biology, 22(5), 850-862.%u2022 Zahir, Z.A., et al. (2001). Plant growth promoting rhizobacteria. Advances in Agronomy, 81, 97-168.%u2022 Dobrev, P.I., & Vankova, R. (2012). Quantification of abscisic acid, cytokinin, and auxin content. Methods in Molecular Biology, 913, 251-261.%u2022 Y%u0131lmaz, H., et al. (2019). Exogenous glycine betaine protects maize against drought stress. Turkish Journal of Botany, 43(6), 716-728.%u2022 Ashraf, M., & Foolad, M.R. (2007). Roles of glycine betaine and proline in stress resistance. Environmental and Experimental Botany, 59(2), 206-216.%u2022 Chen, T.H., & Murata, N. (2008). Glycinebetaine as protectant against abiotic stress. Trends in Plant Science, 13(9), 499-505.%u2022 Szabados, L., & Savour%u00e9, A. (2010). Proline: A multifunctional amino acid. Trends in Plant Science, 15(2), 89-97.%u2022 Ramazan, S., et al. (2018). Amino acids: Stress mitigation and plant development. Plant Growth Regulation, 84(2), 209-221.