Cytokinin Effects on Creeping Bentgrass Response to Heat Stress: II. Leaf Senescence and Antioxidant Metabolism

• DOI: 10.2135/cropsci2002.4660
• Publication Date: 2018-09-11T16:07:57Z
• Authors: Xiaozhong Liu; Bingru Huang
• Keywords: Agrostis; Malondialdehyde; Agrostis stolonifera

In another study, results of growth responses to cytokinin indicate that heat stress injury in creeping bentgrass can be alleviated some extent by injection the root zone. The objective this study was examine whether alleviating effects exogenous application a on ( Agrostis palustris L.) involve regulation antioxidant activities. Creeping exposed three air/soil temperature regimes for 56 d chambers: (i) low air and soil control (20/20°C); (ii) high (20/35°C); (iii) temperatures (35/35°C). Four different concentrations (0.01, 0.1, 1, 10 μmol) zeatin riboside (ZR) or water (control) were injected into zone (0 5 cm depth) plants day before imposed d) 14 after. Leaf electrolyte leakage (EL) content lipid peroxidation product, malondialdehyde (MDA), increased, whereas leaf chlorophyll activities superoxide dismutase (SOD) catalase (CAT) decreased at 20/35°C 35/35°C ZR‐untreated plants. Exogenous ZR significantly suppressed these under both regimes. Application μmol most effective slowing senescence heat‐induced cell membranes, followed 1 35/35°C. Applying 0.1 0.01 had no 20/35 Our suggested related inhibition senescence.