Effects of Chemical and Biological Inhibitors of Ethylene on Heat Tolerance in Annual Bluegrass
Heat-stress-induced ethylene accumulation in plants inhibits growth and intensifies damage. Suppressing ethylene production in heat-stressed plants through chemical and biological inhibitors has been effective in promoting heat tolerance in plants. Aminoethoxyvinylglycine (AVG), is a chemical ethyle...
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American Society for Horticultural Science (ASHS)
2025-02-01
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| author | Sean McBride William Errickson Bingru Huang |
| author_facet | Sean McBride William Errickson Bingru Huang |
| author_sort | Sean McBride |
| collection | DOAJ |
| description | Heat-stress-induced ethylene accumulation in plants inhibits growth and intensifies damage. Suppressing ethylene production in heat-stressed plants through chemical and biological inhibitors has been effective in promoting heat tolerance in plants. Aminoethoxyvinylglycine (AVG), is a chemical ethylene inhibiter that impedes the ethylene synthesis enzyme 1-aminocyclopropane-1-carboxylic acid (ACC) synthase. Biological ethylene inhibitors include bacteria with ACC deaminase (ACCd) enzyme activity, which suppresses ethylene synthesis by breaking down its precursor, ACC. This study tested two ethylene inhibitors, AVG and a novel strain of the ACCd rhizobacteria Paraburkholderia aspalathi, ‘WSF23’, on annual bluegrass (Poa annua L.) to see whether they are effective in promoting its heat tolerance. P. annua plants were subjected to heat stress conditions for 21 d in controlled-environment growth chambers. Plants were separated into three treatment groups: 1) 25 mL of water (untreated control); 2) 25 mL of 25 µmol AVG; 3) 25 mL of P. aspalathi inoculant suspension. Treatments were applied once before imposing temperature treatments and then every 7 d during 21 d of heat stress. Poa annua treated with either AVG or the P. aspalathi had higher turf quality, green canopy cover, leaf relative water content, and chlorophyll contents during heat stress than the untreated control. Additionally, root characteristics were promoted under heat stress after ethylene inhibitor application, where P. annua treated with AVG had greater root depth and dry weight, while the P. aspalathi treatment resulted in greater total root length. Both ethylene inhibitors improved P. annua performance under heat stress, as characterized by delayed chlorophyll degradation and root maintenance. |
| format | Article |
| id | doaj-art-58dc84ee6b8d4114ba9ff94cbdf0824a |
| institution | Kabale University |
| issn | 2327-9834 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | American Society for Horticultural Science (ASHS) |
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| series | HortScience |
| spelling | doaj-art-58dc84ee6b8d4114ba9ff94cbdf0824a2025-02-11T17:07:12ZengAmerican Society for Horticultural Science (ASHS)HortScience2327-98342025-02-01603https://doi.org/10.21273/HORTSCI18179-24Effects of Chemical and Biological Inhibitors of Ethylene on Heat Tolerance in Annual BluegrassSean McBride0William Errickson1Bingru Huang2Department of Plant Biology and Pathology, Rutgers, The State University of New JerseyDepartment of Agriculture and Natural Resources, Rutgers, The State University of New JerseyDepartment of Plant Biology and Pathology, Rutgers, The State University of New JerseyHeat-stress-induced ethylene accumulation in plants inhibits growth and intensifies damage. Suppressing ethylene production in heat-stressed plants through chemical and biological inhibitors has been effective in promoting heat tolerance in plants. Aminoethoxyvinylglycine (AVG), is a chemical ethylene inhibiter that impedes the ethylene synthesis enzyme 1-aminocyclopropane-1-carboxylic acid (ACC) synthase. Biological ethylene inhibitors include bacteria with ACC deaminase (ACCd) enzyme activity, which suppresses ethylene synthesis by breaking down its precursor, ACC. This study tested two ethylene inhibitors, AVG and a novel strain of the ACCd rhizobacteria Paraburkholderia aspalathi, ‘WSF23’, on annual bluegrass (Poa annua L.) to see whether they are effective in promoting its heat tolerance. P. annua plants were subjected to heat stress conditions for 21 d in controlled-environment growth chambers. Plants were separated into three treatment groups: 1) 25 mL of water (untreated control); 2) 25 mL of 25 µmol AVG; 3) 25 mL of P. aspalathi inoculant suspension. Treatments were applied once before imposing temperature treatments and then every 7 d during 21 d of heat stress. Poa annua treated with either AVG or the P. aspalathi had higher turf quality, green canopy cover, leaf relative water content, and chlorophyll contents during heat stress than the untreated control. Additionally, root characteristics were promoted under heat stress after ethylene inhibitor application, where P. annua treated with AVG had greater root depth and dry weight, while the P. aspalathi treatment resulted in greater total root length. Both ethylene inhibitors improved P. annua performance under heat stress, as characterized by delayed chlorophyll degradation and root maintenance.https://journals.ashs.org/hortsci/view/journals/hortsci/60/3/article-p310.xmlaminoethoxyvinylglycineparaburkholderia aspalathi poa annuaplant growth promoting rhizobacteriaroot morphology |
| spellingShingle | Sean McBride William Errickson Bingru Huang Effects of Chemical and Biological Inhibitors of Ethylene on Heat Tolerance in Annual Bluegrass HortScience aminoethoxyvinylglycine paraburkholderia aspalathi poa annua plant growth promoting rhizobacteria root morphology |
| title | Effects of Chemical and Biological Inhibitors of Ethylene on Heat Tolerance in Annual Bluegrass |
| title_full | Effects of Chemical and Biological Inhibitors of Ethylene on Heat Tolerance in Annual Bluegrass |
| title_fullStr | Effects of Chemical and Biological Inhibitors of Ethylene on Heat Tolerance in Annual Bluegrass |
| title_full_unstemmed | Effects of Chemical and Biological Inhibitors of Ethylene on Heat Tolerance in Annual Bluegrass |
| title_short | Effects of Chemical and Biological Inhibitors of Ethylene on Heat Tolerance in Annual Bluegrass |
| title_sort | effects of chemical and biological inhibitors of ethylene on heat tolerance in annual bluegrass |
| topic | aminoethoxyvinylglycine paraburkholderia aspalathi poa annua plant growth promoting rhizobacteria root morphology |
| url | https://journals.ashs.org/hortsci/view/journals/hortsci/60/3/article-p310.xml |
| work_keys_str_mv | AT seanmcbride effectsofchemicalandbiologicalinhibitorsofethyleneonheattoleranceinannualbluegrass AT williamerrickson effectsofchemicalandbiologicalinhibitorsofethyleneonheattoleranceinannualbluegrass AT bingruhuang effectsofchemicalandbiologicalinhibitorsofethyleneonheattoleranceinannualbluegrass |