Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato Microplants
Potato is a globally important, highly heat-susceptible crop species. We investigated the effects of prolonged exposure to elevated temperatures and exogenous salicylic acid (SA) on microplant growth and heat-shock response (HSR) in three unrelated potato genotypes/cultivars. Long-term exposure to 2...
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MDPI AG
2022-04-01
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| Series: | Horticulturae |
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| Online Access: | https://www.mdpi.com/2311-7524/8/5/372 |
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| author | Jelena Rudić Danijel Pantelić Jasmina Oljača Ivana Momčilović |
| author_facet | Jelena Rudić Danijel Pantelić Jasmina Oljača Ivana Momčilović |
| author_sort | Jelena Rudić |
| collection | DOAJ |
| description | Potato is a globally important, highly heat-susceptible crop species. We investigated the effects of prolonged exposure to elevated temperatures and exogenous salicylic acid (SA) on microplant growth and heat-shock response (HSR) in three unrelated potato genotypes/cultivars. Long-term exposure to 29 °C (mild heat stress) caused a significant reduction in the number of surviving explants and shoot morphometric parameters in heat-sensitive genotypes, while exposure to 26 °C (warming) caused only a decline in shoot growth. Interestingly, 26 °C-temperature treatment stimulated root growth in some investigated genotypes, indicating a difference between favorable temperatures for potato shoot and root growth. SA showed a protective effect regarding potato shoot growth at 26 °C. At 29 °C, this effect was genotype-dependent. SA did not affect the number of roots and inhibited root elongation at all temperature treatments, indicating the difference between shoot and root responses to applied SA concentration. Although HSR is mainly considered rapid and short-lived, elevated transcript levels of most investigated <i>HSF</i>s and <i>HSP</i>s were detected after three weeks of heat stress. Besides, two <i>StHSF</i>s and <i>StHSP21</i> showed elevated expression at 26 °C, indicating extreme potato heat-susceptibility and significance of HSR during prolonged warming. SA effects on <i>HSF</i>s and <i>HSP</i>s expression were minor and alterable. |
| first_indexed | 2024-03-10T03:47:17Z |
| format | Article |
| id | doaj.art-620b99b253d543f9bce2e24f7952761a |
| institution | Directory Open Access Journal |
| issn | 2311-7524 |
| language | English |
| last_indexed | 2024-03-10T03:47:17Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Horticulturae |
| spelling | doaj.art-620b99b253d543f9bce2e24f7952761a2023-11-23T11:16:13ZengMDPI AGHorticulturae2311-75242022-04-018537210.3390/horticulturae8050372Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato MicroplantsJelena Rudić0Danijel Pantelić1Jasmina Oljača2Ivana Momčilović3Institute for Biological Research “Siniša Stanković”-National Institute of the Republic of Serbia, University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, SerbiaInstitute for Biological Research “Siniša Stanković”-National Institute of the Republic of Serbia, University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, SerbiaFaculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, SerbiaInstitute for Biological Research “Siniša Stanković”-National Institute of the Republic of Serbia, University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, SerbiaPotato is a globally important, highly heat-susceptible crop species. We investigated the effects of prolonged exposure to elevated temperatures and exogenous salicylic acid (SA) on microplant growth and heat-shock response (HSR) in three unrelated potato genotypes/cultivars. Long-term exposure to 29 °C (mild heat stress) caused a significant reduction in the number of surviving explants and shoot morphometric parameters in heat-sensitive genotypes, while exposure to 26 °C (warming) caused only a decline in shoot growth. Interestingly, 26 °C-temperature treatment stimulated root growth in some investigated genotypes, indicating a difference between favorable temperatures for potato shoot and root growth. SA showed a protective effect regarding potato shoot growth at 26 °C. At 29 °C, this effect was genotype-dependent. SA did not affect the number of roots and inhibited root elongation at all temperature treatments, indicating the difference between shoot and root responses to applied SA concentration. Although HSR is mainly considered rapid and short-lived, elevated transcript levels of most investigated <i>HSF</i>s and <i>HSP</i>s were detected after three weeks of heat stress. Besides, two <i>StHSF</i>s and <i>StHSP21</i> showed elevated expression at 26 °C, indicating extreme potato heat-susceptibility and significance of HSR during prolonged warming. SA effects on <i>HSF</i>s and <i>HSP</i>s expression were minor and alterable.https://www.mdpi.com/2311-7524/8/5/372potatomicropropagationheat stressHSPHSFsalicylic acid |
| spellingShingle | Jelena Rudić Danijel Pantelić Jasmina Oljača Ivana Momčilović Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato Microplants Horticulturae potato micropropagation heat stress HSP HSF salicylic acid |
| title | Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato Microplants |
| title_full | Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato Microplants |
| title_fullStr | Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato Microplants |
| title_full_unstemmed | Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato Microplants |
| title_short | Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato Microplants |
| title_sort | effects of elevated temperature and salicylic acid on heat shock response and growth of potato microplants |
| topic | potato micropropagation heat stress HSP HSF salicylic acid |
| url | https://www.mdpi.com/2311-7524/8/5/372 |
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