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TY - JOUR
AU - CETINKAYA, Hatice
AU - TASCI, Eda
AU - SECKIN DINLER, Burcu
PY - 2014/09/23
Y2 - 2025/09/23
TI - Regulation of glutathione S-transferase enzyme activity with salt pre-treatment under heat stress in maize leaves
JF - Research in Plant Biology
JA - RIPB
VL - 4
IS - 5
SE - Articles
DO -
UR - https://www.updatepublishing.com/journal/index.php/ripb/article/view/2627
SP -
AB - <span style="font-family: Times New Roman; font-size: small;"> </span><p style="margin: 0cm 0cm 10pt 17.85pt; text-align: justify; line-height: normal; tab-stops: 63.7pt;" class="MsoNormal"><strong style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-ansi-language: EN-US;">Abstract- </span></strong><span lang="EN-US" style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-ansi-language: EN-US;">The present study was conducted to present the responses of heat-sensitive (Shemal) and heat-tolerant (71MAY69) maize cultivars under heat stress (at <span style="background: white;">40 <sup><span style="mso-spacerun: yes;"> </span></sup></span></span><span lang="EN-US" style="background: white; font-family: Symbol; font-size: 12pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-ansi-language: EN-US; mso-char-type: symbol; mso-symbol-font-family: Symbol;"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol;">°</span></span><span lang="EN-US" style="background: white; font-family: "Times New Roman","serif"; font-size: 12pt; mso-ansi-language: EN-US;">C for 2 hours in 2 days) with pre-salinity treatment </span><span lang="EN-US" style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-ansi-language: EN-US;">(<span style="background: white;">50 mM</span><span style="background: white;"> NaCl)<span style="mso-spacerun: yes;"> </span>to determine the relation of salicylic acid (SA) and </span>glutathione <em style="mso-bidi-font-style: normal;">S</em>-transferase (GST) enzyme activity in those responses. Relative water content <span style="background: white;">(RWC), chlorophyll content (CHL), stomatal conductance (g<sub>s</sub>), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), malondialdehyde (MDA) content, GST enzyme and isoenzyme activity and internal SA levels were investigated. While heat treatments resulted in low RWC, CHL g<sub>s</sub> and high MDA and H<sub>2</sub>O<sub>2</sub> levels in sensitive cultivar, all these values were lower in tolerant cultivar. Compared to single heat stress treatments, heat stress with pre-salinity treatment increased GST enzyme and isozyme activity of both cultivars. Results also indicated that pre-salinity treatment triggered internal SA levels and hydrogen peroxide contents in sensitive leaves according to control groups. Such hydrogen peroxide levels also decreased by increasing total GST and isozyme activities under heat alone, pre-salinity treatment alone. As a result, it could be said that SA is a good signal for the changes of GST enzyme activity under heat stress treatment. </span><strong style="mso-bidi-font-weight: normal;"></strong></span></p><span style="font-family: Times New Roman; font-size: small;"> </span>
ER -