Foliar application of salicylic acid improves growth and yield attributes by upregulating the antioxidant defense system in Brassica campestris plants grown in lead-amended soils

• Autorzy: Hasanuzzaman M. , Matin Md.A. , Fardus J. , Hasanuzzaman Md. , Hossain Md.S. , Parvin K.

Warianty tytułu

PL

Dolistna aplikacja kwasu salicylowego wpływa korzystnie na parametry wzrostu i plonowania roślin Brassica campestris rosnących w glebie zanieczyszczonej ołowiem poprzez pozytywną regulację systemu obrony antyoksydacyjne

• Języki publikacji: EN

Abstrakty

EN

Lead (Pb) toxicity causes a severe impact on plant growth and productivity. A protective role of salicylic acid (SA) is well known under different abiotic stress conditions. However, very little is known about the SA-induced Pb resistance mechanism. In this study, we investigated the effect of SA on mustard plants (Brassica campestris L.) under Pb-stress conditions. Plants were exposed to three levels of Pb amendment to the soil (0.25, 0.50, 1.00 mM), with or without SA (0.25 mM). Plant growth, yield attributes, and yield at harvest were reduced depending on the severity of the Pb stress. Exogenous application of SA improved plant growth and yield. Biochemical data revealed that Pb toxicity resulted in higher oxidative damage by reducing nonenzymatic antioxidants such as ascorbate and glutathione at the higher dose of Pb treatment. Antioxidant enzymes (ascorbate peroxidase – APX, monodehydroascorbate reductase – MDHAR, dehydroascorbate reductase – DHAR, glutathione reductase – GR, guaiacol peroxidase – POD, glutathione S-transferase – GST, and catalase – CAT) responses varied with the Pb doses. Both the nonenzymatic and enzymatic components of the antioxidant defense system were upregulated after application of SA, resulting in lower oxidative damage under Pb-stress conditions. Taken together, the results suggest that exogenous application of the SA mitigates Pb-induced oxidative damage and consequently results in better growth and yield in mustard plants.

PL

Toksyczność ołowiu (Pb) wywiera silny wpływ na wzrost i produktywność roślin. Ochronna rola kwasu salicylowego (SA) jest dobrze znana w warunkach różnych stresów abiotycznych. Jednak niewiele wiadomo na temat indukowanego SA mechanizmu oporności na Pb. W przeprowadzonych badaniach określiliśmy wpływ SA na rośliny gorczycy (Brassica campestris L.) w warunkach stresu wywołanego Pb. Rośliny poddano działaniu trzech poziomów Pb wprowadzonych do gleby (0,25, 0,50, 1,00 mM), z lub bez SA (0,25 mM). Wzrost, wskaźniki plonowania oraz plon roślin uległy zmniejszeniu w zależności od nasilenia stresu indukowanego Pb. Egzogenna aplikacja SA wpłynęła na poprawę wzrostu i plonowania roślin. Wyniki analiz biochemicznych wykazały, że toksyczność Pb powodowała większe uszkodzenia oksydacyjne związane z obniżeniem zawartości nieenzymatycznych antyoksydantów, takich jak askorbinian i glutation, w obecności wyższych stężeń tego metalu. Aktywność enzymów antyoksydacyjnych (peroksydazy askorbinianowej – APX, reduktazy monodehydroaskorbinianowej – MDHAR, reduktazy dehydroaskorbiniano- wej – DHAR, reduktazy glutationowej – GR, peroksydazy gwajakolowej – POD, S-transferazy glutationowej – GST i katalazy – CAT) była uzależniona od stężenia Pb. Zarówno nieenzymatyczne, jak i enzymatyczne elementy systemu obrony antyoksydacyjnej były pozytywnie regulowane po zastosowaniu SA, co powodowało mniejsze uszkodzenia oksydacyjne występujące w warunkach stresu Pb. Podsumowując, uzyskane wyniki sugerują, że egzogenna aplikacja SA łagodzi uszkodzenia oksydacyjne wywołane obecnością Pb, a w konsekwencji prowadzi do lepszego wzrostu i plonowania gorczycy w warunkach ekspozycji na różne poziomy stresu indukowanego Pb.

• Wydawca: -
• Czasopismo: Acta Agrobotanica
• Rocznik: 2019
• Tom: 72
• Numer: 2
• Opis fizyczny: Article: 1765 [16 p.], fig.,ref.

Twórcy

autor

Hasanuzzaman M.

• Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

autor

Matin Md.A.

• Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

autor

Fardus J.

• Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

autor

Hasanuzzaman Md.

• Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

autor

Hossain Md.S.

• Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan

autor

Parvin K.

• Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan

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Identyfikatory

DOI

10.5586/aa.1765