Carotene-enhanced Heat Tolerance in Creeping Bentgrass in Association with Regulation of Enzymatic Antioxidant Metabolism
Heat-induced leaf senescence has been associated with stress-induced oxidative damage. The major objective of this study was to determine whether exogenous application of β-carotene may improve heat tolerance in creeping bentgrass (Agrostis stolonifera cv. Penncross) by suppressing leaf senescence a...
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| Format: | Article |
| Language: | English |
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American Society for Horticultural Science (ASHS)
2022-04-01
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| Series: | Journal of the American Society for Horticultural Science |
| Subjects: | |
| Online Access: | https://journals.ashs.org/jashs/view/journals/jashs/147/3/article-p145.xml |
| _version_ | 1811282502321438720 |
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| author | Stephanie Rossi Bingru Huang |
| author_facet | Stephanie Rossi Bingru Huang |
| author_sort | Stephanie Rossi |
| collection | DOAJ |
| description | Heat-induced leaf senescence has been associated with stress-induced oxidative damage. The major objective of this study was to determine whether exogenous application of β-carotene may improve heat tolerance in creeping bentgrass (Agrostis stolonifera cv. Penncross) by suppressing leaf senescence and activating antioxidant metabolism. Plants were subjected to heat stress at 35/30 °C (day/night) or at the optimal temperature of 22/18 °C (day/night), and were treated with either β-carotene (1 mm) or water (untreated control) by foliar spraying every 7 days for 28 days in controlled-environment growth chambers. β-Carotene application suppressed heat-induced leaf senescence, as demonstrated by an increase in turf quality (TQ) and leaf chlorophyll content as well as a reduction in electrolyte leakage (EL). β-Carotene-treated plants had a significantly lower malondialdehyde (MDA) content and significantly greater activity of antioxidant enzymes, including superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) from 14 through 28 days of heat stress, and ascorbate peroxidase (APX) activity from 21 through 28 days of heat stress. These findings suggest that β-carotene may promote heat tolerance by enhancing antioxidant activity to suppress leaf senescence. |
| first_indexed | 2024-04-13T01:53:57Z |
| format | Article |
| id | doaj.art-6f354487526840dcac78d5a415f8652b |
| institution | Directory Open Access Journal |
| issn | 2327-9788 |
| language | English |
| last_indexed | 2024-04-13T01:53:57Z |
| publishDate | 2022-04-01 |
| publisher | American Society for Horticultural Science (ASHS) |
| record_format | Article |
| series | Journal of the American Society for Horticultural Science |
| spelling | doaj.art-6f354487526840dcac78d5a415f8652b2022-12-22T03:07:49ZengAmerican Society for Horticultural Science (ASHS)Journal of the American Society for Horticultural Science2327-97882022-04-011473https://doi.org/10.21273/JASHS05201-22Carotene-enhanced Heat Tolerance in Creeping Bentgrass in Association with Regulation of Enzymatic Antioxidant MetabolismStephanie RossiBingru HuangHeat-induced leaf senescence has been associated with stress-induced oxidative damage. The major objective of this study was to determine whether exogenous application of β-carotene may improve heat tolerance in creeping bentgrass (Agrostis stolonifera cv. Penncross) by suppressing leaf senescence and activating antioxidant metabolism. Plants were subjected to heat stress at 35/30 °C (day/night) or at the optimal temperature of 22/18 °C (day/night), and were treated with either β-carotene (1 mm) or water (untreated control) by foliar spraying every 7 days for 28 days in controlled-environment growth chambers. β-Carotene application suppressed heat-induced leaf senescence, as demonstrated by an increase in turf quality (TQ) and leaf chlorophyll content as well as a reduction in electrolyte leakage (EL). β-Carotene-treated plants had a significantly lower malondialdehyde (MDA) content and significantly greater activity of antioxidant enzymes, including superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) from 14 through 28 days of heat stress, and ascorbate peroxidase (APX) activity from 21 through 28 days of heat stress. These findings suggest that β-carotene may promote heat tolerance by enhancing antioxidant activity to suppress leaf senescence.https://journals.ashs.org/jashs/view/journals/jashs/147/3/article-p145.xmlabiotic stressbiostimulantcarotenoidsexogenousleaf senescenceturfgrass |
| spellingShingle | Stephanie Rossi Bingru Huang Carotene-enhanced Heat Tolerance in Creeping Bentgrass in Association with Regulation of Enzymatic Antioxidant Metabolism Journal of the American Society for Horticultural Science abiotic stress biostimulant carotenoids exogenous leaf senescence turfgrass |
| title | Carotene-enhanced Heat Tolerance in Creeping Bentgrass in Association with Regulation of Enzymatic Antioxidant Metabolism |
| title_full | Carotene-enhanced Heat Tolerance in Creeping Bentgrass in Association with Regulation of Enzymatic Antioxidant Metabolism |
| title_fullStr | Carotene-enhanced Heat Tolerance in Creeping Bentgrass in Association with Regulation of Enzymatic Antioxidant Metabolism |
| title_full_unstemmed | Carotene-enhanced Heat Tolerance in Creeping Bentgrass in Association with Regulation of Enzymatic Antioxidant Metabolism |
| title_short | Carotene-enhanced Heat Tolerance in Creeping Bentgrass in Association with Regulation of Enzymatic Antioxidant Metabolism |
| title_sort | carotene enhanced heat tolerance in creeping bentgrass in association with regulation of enzymatic antioxidant metabolism |
| topic | abiotic stress biostimulant carotenoids exogenous leaf senescence turfgrass |
| url | https://journals.ashs.org/jashs/view/journals/jashs/147/3/article-p145.xml |
| work_keys_str_mv | AT stephanierossi caroteneenhancedheattoleranceincreepingbentgrassinassociationwithregulationofenzymaticantioxidantmetabolism AT bingruhuang caroteneenhancedheattoleranceincreepingbentgrassinassociationwithregulationofenzymaticantioxidantmetabolism |