Antioxidant Response to Harmone‐Containing Product in Kentucky Bluegrass Subjected to Drought

Zhang, Xungzhong; Schmidt, R. E.

doi:10.2135/cropsci1999.0011183x003900020040x

Cited by 103 publications

(98 citation statements)

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“…A high level of antioxidant in Sitreated bentgrass can condition turfgrass to tolerant environmental stress (Zhang and Schmidt, 1999).…”

Section: Superoxide Dismutase Activitymentioning

confidence: 99%

“…Zhang and Schmidt (1999) reported that bentgrass with a high level of antioxidant such as Superoxide dismutase produced better turf quality. Silicate has been shown to enhance plant growth and reduced severity of fungal diseases of creeping bentgrass (Gussack et al, 1998;Uriarte and Bowman, 1996), rice (Datnoff et al, 1991), and cucumber (Belanger et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Response of photosynthesis and superoxide dismutase to silica applied to creeping bentgrass grown under two fertility levels

Schmidt¹,

Zhang

Chalmers

1999

Journal of Plant Nutrition

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Responses of photosynthesis, Superoxide dismutase activity, and disease tolerance of creeping bentgrass (Agrostis palustris Huds. A.) to soluble potassium silicate (20.8% SiO 2 ) treatments was investigated under two fertilization regimes during 1997 and 1998. Potassium silicate was applied twice a month at 603 and 1205 mL 100 m -2 under high or low fertilization regimes in the field, sampled from which were subjected to low soil moisture in a greenhouse environment. Foliar application of silicate stimulated antioxidant superoxide dismutase (SOD) activity in the bentgarss, especially under the high fertilization regime. Silicate increased photosynthetic capacity (PC) and chlorophyll content when applied at 603 mL 100 m -2 . Dollarspot disease incidence was significantly reduced with silicate treatment regardless of fertilization regime. Silicate did not significantly impact clipping weight. Under low soil moisture (-0.05 MPa), silicate also enhanced SOD activity, PC, and chlorophyll content as well as root mass of bentgrass. Results suggest silicate may be used to enhance turfgrass drought and disease tolerance of turfgrass.

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“…A high level of antioxidant in Sitreated bentgrass can condition turfgrass to tolerant environmental stress (Zhang and Schmidt, 1999).…”

Section: Superoxide Dismutase Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Response of photosynthesis and superoxide dismutase to silica applied to creeping bentgrass grown under two fertility levels

Schmidt¹,

Zhang

Chalmers

1999

Journal of Plant Nutrition

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“…12.7 and 4.8%, respectively. [7,28] Because of these qualities, DMF, a polar solvent, demonstrated limited improvement compared with acetone for extraction of this particular pigment. After the initial 20 min of stirring, the extracts treated with DMF were noticeably darker green and had less green tissue remaining than extracts with acetone.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Acetone and N,N-Dimethylformamide for Pigment Extraction in Turfgrass

Stiegler¹,

Bell

Maness

2004

Comm Soil Sci Plant An

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The extraction and isolation of plant pigments are critical parts of the procedures used for pigment analyses by plant scientists. Various organic solvents have been used to liberate chlorophylls and carotenoids, including xanthophylls, from plant tissue. Acetone extraction is the most common extractant, but other solvents, such as N,N-dimethylformamide (DMF), have been used successfully. The objectives of this study were to compare the repeatability of acetone and DMF extraction for turfgrass pigment analysis and to investigate which extraction method is more appropriate for sample preparation before analysis using high-performance liquid chromatography (HPLC). Leaf tissue was collected from three plots ORDER REPRINTS of a mixed sward of creeping bentgrass (Agrostis stolonifera L.) and annual bluegrass (Poa annua L.) that were differentially treated in the field with magnesium (Mg), iron (Fe), and/or a plant growth regulator to encourage a range of leaf pigment concentrations. Variation among tissue samples, pigment extraction, and the HPLC process was used to compare the precision of acetone with DMF extraction. Results indicated that both acetone and DMF extraction procedures exhibited acceptable variation, but DMF extraction was more consistent at each procedural level. Procedural levels included variation among tissue samples (coefficient of variation ¼ 11.2 < 12.1), variation among HPLC measurements (coefficient of variation ¼ 2.1 < 2.9), and variation among extracted samples (coefficient of variation ¼ 4.8 < 12.7). The DMF extraction also yielded 84% more neoxanthin, 53% more violaxanthin, 47% more lutein, 104% more chlorophyll b, 145% more chlorophyll a, and 14% more b-carotene than acetone. Overall, pigment extraction with DMF produced more quantitative and more reliable results than acetone extraction.

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“…Significant increases in superoxide oxidase and ascorbate peroxidase content were also noted in different genotypes of fescue under water‐deficit; again, the extent of the increase was dependent on the extent of their drought resistance (Sarmast et al., ). Kentucky bluegrass, in contrast, showed no significant effect of drought stress on leaf superoxide dismutase activity (Zhang & Schmidt, ). Da Costa and Huang () reported a consistent decrease in both superoxide dismutase and catalase activities in the leaves of creeping bentgrass when exposed to prolonged water‐deficit, and similar decreases in superoxide dismutase expression were reported in the roots of drought‐stressed creeping bentgrass (Xu et al., ).…”

Section: Effects Of Drought On Metabolism Of Cool‐season Grassesmentioning

confidence: 99%

Impacts of abiotic stresses on the physiology and metabolism of cool‐season grasses: A review

Loka

Harper

Humphreys

et al. 2018

Food and Energy Security

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Grasslands cover more than 70% of the world's agricultural land playing a pivotal role in global food security, economy, and ecology due to their flexibility and functionality. Climate change, characterized by changes in temperature and precipitation patterns, and by increased levels of greenhouse gases in the atmosphere, is anticipated to increase both the frequency and severity of extreme weather events, such as drought, heat waves, and flooding. Potentially, climate change could severely compromise future forage crop production and should be considered a direct threat to food security. This review aimed to summarize our current understanding of the physiological and metabolic responses of temperate grasses to those abiotic stresses associated with climate change. Primarily, substantial decreases in photosynthetic rates of cool‐season grasses occur as a result of high temperatures, water‐deficit or water‐excess, and elevated ozone, but not CO2 concentrations. Those decreases are usually attributed to stomatal and non‐stomatal limitations. Additionally, while membrane instability and reactive oxygen species production was a common feature of the abiotic stress response, total antioxidant capacity showed a stress‐specific response. Furthermore, climate change‐related stresses altered carbohydrate partitioning, with implications for biomass production. While water‐deficit stress, increased CO2, and ozone concentrations resulted in higher carbohydrate content, the opposite occurred under conditions of heat stress and flooding. The extent of damage is greatly dependent on location, as well as the type and intensity of stress. Fortunately, temperate forage grass species are highly heterogeneous. Consequently, through intra‐ and in particular inter‐specific plant hybridization (e.g., Festuca x Lolium hybrids) new opportunities are available to harness, within single genotypes, gene combinations capable of combating climate change.

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Antioxidant Response to Harmone‐Containing Product in Kentucky Bluegrass Subjected to Drought

Cited by 103 publications

References 0 publications

Response of photosynthesis and superoxide dismutase to silica applied to creeping bentgrass grown under two fertility levels

Response of photosynthesis and superoxide dismutase to silica applied to creeping bentgrass grown under two fertility levels

Comparison of Acetone and N,N-Dimethylformamide for Pigment Extraction in Turfgrass

Impacts of abiotic stresses on the physiology and metabolism of cool‐season grasses: A review

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