Drought and Heat Stress Injury to Two Cool‐Season Turfgrasses in Relation to Antioxidant Metabolism and Lipid Peroxidation

Jiang, Yiwei; Huang, Bingru

doi:10.2135/cropsci2001.412436x

Cited by 397 publications

(247 citation statements)

References 52 publications

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“…The decrease in viability of leaf tissue at 45/40°C in our case is in agreement with the observations on wheat (Wang and Nguyen 1989) and potato (Coria et al 1998) plants exposed to heat stress. Our observations on decrease in leaf water content are in concurrence with the findings on wheat (Sairam et al 2000), turfgrass (Jiang and Huang 2001) and Kentucky bluegrass (Liu et al 2008) plants subjected to heat stress. The drop in leaf water status observed here can be attributed to reduction in hydraulic conductivity of the roots by heat stress, as reported earlier in tomato (Morales et al 2003).…”

Section: Effects Of Heat Stresssupporting

confidence: 92%

Proline induces heat tolerance in chickpea (Cicer arietinum L.) plants by protecting vital enzymes of carbon and antioxidative metabolism

Kaushal

Gupta

Bhandhari

et al. 2011

Physiol Mol Biol Plants

160

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Chickpea is a heat sensitive crop hence its potential yield is considerably reduced under high temperatures exceeding 35°C. In the present study, we evaluated the efficacy of proline in countering the damage caused by heat stress to growth and to enzymes of carbon and antioxidative metabolism in chickpea. The chickpea seeds were raised without (control) and with proline (10 μM) at temperatures of 30/25°C, 35/30°C, 40/35°C and 45/40°C as day/ night (12 h/12 h) in a growth chamber. The shoot and root length at 40/35°C decreased by 46 and 37 %, respectively over control while at 45/40°C, a decrease of 63 and 47 %, respectively over control was observed. In the plants growing in the presence of 10 μM proline at 40/35°C and 45/40°C, the shoot length showed improvement of 32 and 53 %, respectively over untreated plants, while the root growth was improved by 22 and 26 %, respectively. The stress injury (as membrane damage) increased with elevation of temperatures while cellular respiration, chlorophyll content and relative leaf water content reduced as the temperature increased to 45/40°C. The endogenous proline was elevated to 46 μmol g −1 dw at 40/35°C but declined to 19 μmol g −1 dw in plants growing at 45/40°C that was associated with considerable inhibition of growth at this temperature. The oxidative damage measured as malondialdehyde and hydrogen peroxide content increased manifolds in heat stressed plants coupled with inhibition in the activities of enzymatic (superoxide dismutase, catalase, ascorbate peroxidase, glutathione reductase) and levels of non-enzymatic (ascorbic acid, glutathione, proline) antioxidants. The enzymes associated with carbon fixation (RUBISCO), sucrose synthesis (sucrose phosphate synthase) and sucrose hydrolysis (invertase) were strongly inhibited at 45/40°C. The plants growing in the presence of proline accumulated proline up to 63 μmol g −1 dw and showed less injury to membranes, had improved content of chlorophyll and water, especially at 45/40°C. Additionally, the oxidative injury was significantly reduced coupled with elevated levels of enzymatic and non-enzymatic antioxidants. A significant improvement was also noticed in the activities of enzymes of carbon metabolism in proline-treated plants. We report here that proline imparts partial heat tolerance to chickpea's growth by reducing the cellular injury and protection of some vital enzymes related to carbon and oxidative metabolism and exogenous application of proline appears to have a countering effect against elevated high temperatures on chickpea.

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Section: Effects Of Heat Stresssupporting

confidence: 92%

Proline induces heat tolerance in chickpea (Cicer arietinum L.) plants by protecting vital enzymes of carbon and antioxidative metabolism

Kaushal

Gupta

Bhandhari

et al. 2011

Physiol Mol Biol Plants

160

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“…Moreover, it also alters the physiological processes such as photosynthesis, accumulation of lipids and transcript expression [52,53].…”

Section: Combined Effects Of Drought and Heat Stressmentioning

confidence: 99%

Impacts of Heat Stress on Wheat: A Critical Review

Iqbal¹,

Raja²,

Yasmeen³

et al. 2017

Adv Crop Sci Tech

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A brief review is given of investigations on stress-induced alterations in the yield of different biochemical contents in wheat. Wheat is major cereal crop for fulfilling the calories demands of growing population. Alterations in the worldwide climate are predicted to have critical sentence for crop production. Abiotic stresses such as heat and drought are major abiotic stresses restraining crop production. Heat stress reduces wheat growth by upsetting various physiological and biochemical processes and the developmental stage of the plant is critical in demonstrating the vulnerability of various species and cultivars subjected to high temperature. Heat stress did not affect the protein content but there is strong correlation between leaf nitrogen content and grain protein content. Induction of HSPs seems to be the universal response and adaptation to temperature stress. The synthesis of HSPs is believed to play significant role either in preventing or minimizing the adverse effects of high temperature both at molecular and cellular levels. Wheat has the tendency to adopt diverse types of responses to temperature stress as well as a heat shock by developing thermo-tolerance for the enhancement of the grain quality and yield.

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“…Oxidative stress can prevent photosynthetic activity, respiration process and plant growth. Plants are naturally provided by enzymatic and non-enzymatic systems to take care active oxygen [13] .…”

Section: Introductionmentioning

confidence: 99%

Response of Maize to Nutrients Foliar Application Under Water Deficit Stress Conditions

Naderi¹

2009

American J. of Agricultural and Biological Sciences

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Problem statement:To investigate the effect of nutrient application on agronomical characteristic and water use efficiency under water deficit stress of hybrid maize 704, an experiment was arranged in a split plot factorial based on a complete randomized block design with four replicates in the research station of Islamic Azad University-Arak Branch, Iran in 2007. Approach: Main factors studied were four irrigation levels including irrigation equal to crop water requirement, water deficit stress at eight-leaf stage (V 8 ), stage of blister (R 2 ) and stage of filling grain in the main plot. Combined levels of selenium treatment (without and with application 20 g ha −1 ) were applied 2 weeks before execution of water stress treatment and micronutrients (without and with application) that was provided by specific fertilizer for maize called "Biomin", which contained Fe, Zn, Cu, Mn, B, Mo and Mg in the form of foliar application at six-leaf stage and 1 week before tasseling stage at the rate of 2 L ha −1 were situated in sub plots. Results: Results indicated that effect of water deficit stress on 1000 grain weight, grain yield, harvest index and water use efficiency at different growth stages was significant at 1% level. Water deficit stress decreased grain yield 33% in grain filling stage as compared with control. Using selenium increased mentioned traits but the increase was non significant. Effects of twofold interactions of water deficit stress and selenium showed that using selenium in water deficit stress condition increased measured traits as compared with treatment without selenium. A negative antagonistic interaction was found between selenium and micronutrients on some measured traits. In between treatments of water deficit stress, highest grain yield (8159.33 kg ha −1 ) was obtained from combined treatment of water deficit stress at eight-leaf stage with selenium application and without micronutrients which compared with treatment of irrigation equal to crop water requirement, without selenium and microelements did not differ significant. Conclusion: According to the results of experiment, using microelements in optimum water availability and using selenium in water deficit stress condition increased mentioned traits as compared to treatments control.

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Drought and Heat Stress Injury to Two Cool‐Season Turfgrasses in Relation to Antioxidant Metabolism and Lipid Peroxidation

Cited by 397 publications

References 52 publications

Proline induces heat tolerance in chickpea (Cicer arietinum L.) plants by protecting vital enzymes of carbon and antioxidative metabolism

Proline induces heat tolerance in chickpea (Cicer arietinum L.) plants by protecting vital enzymes of carbon and antioxidative metabolism

Impacts of Heat Stress on Wheat: A Critical Review

Response of Maize to Nutrients Foliar Application Under Water Deficit Stress Conditions

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