Salicylic Acid and ۲۴-Epibrassinolide Induced Thermotolerance in Bell Pepper through Enhanced Antioxidant Enzyme System and Heat Shock Proteins
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JASTMO-25-1_006
تاریخ نمایه سازی: 22 آبان 1402
Abstract:
Elevated temperature negatively affects the production of bell pepper (Capsicum annuum L.) especially under North Indian plains where the temperature is above ۴۰°C during summers. In the present study, the effect of exogenous application of Plant Growth Regulators (PGRs) viz. Salicylic Acid (SA) and ۲۴-Epibrassinolide (EBR) on biochemical parameters and antioxidant system of bell pepper cv. Royal Wonder was evaluated. PGRs were applied exogenously ۳۰, ۶۰ and ۹۰ Days After Transplantation (DAT). All the concentrations of PGRs i.e SA (۰.۱۰, ۰.۲۰, and ۰.۵۰ mM) and EBR (۰.۰۵, ۰.۱۰, and ۰.۲۰ µM) were effective in ameliorating the heat shock-induced effects, which enhanced thermotolerance in terms of increased proline content, soluble proteins, total phenols, total soluble sugars and starch content, improved antioxidant system (CAT, APX, POX, SOD and GR) with reduced lipid peroxidation and cellulase enzyme activity at high temperature, and, ultimately, improving total fruit yield. Application of ۰.۲۰ mM SA improved thermotolerance most efficiently at all growth stages, specifically when spray was done at ۳۰ and ۶۰ DAT. It resulted in a significant enhancement in biochemical parameters and antioxidant enzyme system as compared to the untreated control.
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Authors
T. Preet
Department of Botany, Saroop Rani Government College for Women, Amritsar-۱۴۳۰۰۱, India.
N. Ghai
Department of Botany, Punjab Agricultural University, Ludhiana-۱۴۱۰۰۴, India.
S. K. Jindal
Department of Vegetable Science, Punjab Agricultural University, Ludhiana-۱۴۱۰۰۴, India.
M. Kaur Sangha
Department of Biochemistry, Punjab Agricultural University, Ludhiana-۱۴۱۰۰۴, India.
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