Malondialdehyde content as a potential biochemical indicator of tolerant Cenchrus ciliaris L. genotypes under heat stress treatment

Abstract

Buffel grass (Cenchrus ciliaris L.) is an important forage grass in arid and semiarid regions. As part of a genetic improvement programme, four genotypes [Biloela (Bl), Americana (Am), Texas (Tx) and Sexual (Sx)] were categorized by tolerance to heat stress in a greenhouse experiment. At 30 d after sowing, half of the plants (control plants) were transferred to growth chambers (28°C day per night), and the other half (pre-treated plants, Prt) were exposed to heat stress treatment (0, 24, 48 and 72 h; 45°C day per night). Malondialdehyde (MDA) content, an indicator of oxidative damage, was determined from foliar samples. During heat stress, Sx showed the earliest increase in MDA (at 24 h) followed by Tx (48 h) and Am and Bl (72 h). Results were compared with heat-stress tolerance evaluated as morphological traits at the end of recuperation (60 d after sowing). Fresh weight and aerial plant height were lowest in the Prt-Sx genotype and highest in Am and Bl genotypes; Tx showed intermediate tolerance. Results suggest that tolerance to heat stress in C. ciliaris genotypes could be related to the capacity for regulating the oxidative damage increase. Foliar MDA content might therefore be used in a genetic improvement programme of C. ciliaris as a potential biochemical indicator for a rapid, simple and low-cost identification of heat-stress tolerant genotypes.

Taurine and tea polyphenols combination ameliorate nonalcoholic steatohepatitis in rats

“…Methane dicarboxylic aldehyde (MDA) is a decomposition product of the polyunsaturated fatty acid hydroperoxides that are generated from reactions with ROS [ 13 ]. Hence, the MDA level is considered an indirect index of the extent of lipid peroxidation.…”

Allelopathic Effects of Aqueous Leaf Extracts from Four Shrub Species on Seed Germination and Initial Growth of Amygdalus pedunculata Pall.

“…The content and composition of chlorophyll determines plants' absorption and utilization efficiency of different light; therefore, it is often considered an important indicator of photosynthetic physiology [25]. Many studies have indicated that allelochemicals can affect every aspect of plant growth and plants' physiological and biochemical processes [43][44][45][46][47]. An increase in inhibitory allelochemicals such as terpenes, furanones, phenol abscisic acid, coumarin, and so on, can hinder seed germination and seedling growth through physiological and biochemical processes [48].…”

Extreme Temperature Responses, Oxidative Stress and Antioxidant Defense in Plants

“…The drastic increase in lipid peroxidation due to HT stress was reported by many researchers [162,177]. Several lines of study indicated that under heat-stress conditions, malondialdehyde (MDA), a product of peroxidation of unsaturated fatty acids, has been used as a good indicator of free radical damage to cell membranes [12,178,179]. In wheat seedlings (8-d old) gradual increase in the accumulation of H 2 O 2 was observed (0.5, 0.58, 0.78 and 1.1 μmol g -1 FW) in response to differential heat shock treatment of 22, 30, 35 and 40°C for 2 h [180].…”